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Strasding M, Marchand L, Merino E, Zarauz C, Pitta J. Material and abutment selection for CAD/CAM implant-supported fixed dental prostheses in partially edentulous patients - A narrative review. Clin Oral Implants Res 2024. [PMID: 38864592 DOI: 10.1111/clr.14315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 05/15/2024] [Accepted: 05/27/2024] [Indexed: 06/13/2024]
Abstract
Restorative material selection has become increasingly challenging due to the speed of new developments in the field of dental material science. The present narrative review gives an overview of the current indications for implant abutments and restoration materials for provisional and definitive implant-supported fixed dental prostheses in partially edentulous patients. For single implant restorations, titanium base abutments for crowns are suggested as an alternative to the conventional stock- and customized abutments made out of metal or zirconia. They combine the mechanical stability of a metallic connection with the esthetic potential of ceramics. For multiple-unit restorations, conical titanium bases especially designed for bridges are recommended, to compensate for deviating implant insertion axes and angulations. Even though titanium base abutments with different geometries and heights are available, certain clinical scenarios still benefit from customized titanium abutments. Indications for the definitive material in fixed implant restorations depend on the region of tooth replacement. In the posterior (not esthetically critical) zone, ceramics such as zirconia (3-5-Ymol%) and lithium-disilicate are recommended to be used in a monolithic fashion. In the anterior sector, ceramic restorations may be buccally micro-veneered for an optimal esthetic appearance. Lithium-disilicate is only recommended for single-crowns, while zirconia (3-5-Ymol%) is also recommended for multiple-unit and cantilever restorations. Attention must be given to the specific mechanical properties of different types of zirconia, as some feature reduced mechanical strengths and are therefore not indicated for all regions and restoration span lengths. Metal-ceramics remain an option, especially for cantilever restorations.
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Affiliation(s)
- Malin Strasding
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Laurent Marchand
- Department of Prosthodontics, School of Dental Medicine, Tufts University, Boston, Massachusetts, USA
| | - Elizabeth Merino
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Cristina Zarauz
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - João Pitta
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
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Ferrairo BM, de Azevedo-Silva LJ, Minim PR, Monteiro-Sousa RS, Pereira LF, Bitencourt SB, Cesar PF, Sidhu SK, Borges AFS. Biomechanical consideration in tooth-supported glass-ceramic restorations: A systematic review and meta-analysis of survival rates and irreparable failures. J Prosthet Dent 2024:S0022-3913(24)00357-3. [PMID: 38849264 DOI: 10.1016/j.prosdent.2024.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 05/08/2024] [Accepted: 05/09/2024] [Indexed: 06/09/2024]
Abstract
STATEMENT OF PROBLEM Knowledge on the biomechanical behavior of glass-ceramics, their survival rate over time, and their potential failures is essential for decision-making in clinical practice. Systematic reviews and meta-analysis of their survival rates and irreparable failures are lacking. PURPOSE The purpose of this systematic review and meta-analysis was to evaluate the survival rates and irreparable failures of various monolithic glass-ceramic dental restorations to help determine biomechanical indications. MATERIAL AND METHODS A comprehensive literature search was conducted across the PubMed, Scopus, Web of Science, and EMBASE databases based on the population, intervention, comparison, and outcome (PICO) question, risk of bias assessment, data extraction, subgroup analysis, and meta-analysis. Both randomized and nonrandomized clinical trials that reported survival rate and irreparable failure were screened. The risk, with a 95% confidence interval, was calculated by using the Mantel-Haenszel method. RESULTS A total of 46 articles met the inclusion criteria: 8 for laminate veneers, 20 for partial coverage restorations, 11 for single crowns, and 6 for fixed partial dentures, encompassing 1715 participants rehabilitated with 4209 restorations. The estimated cumulative survival rate for partial coverage restorations was 90% over an average span of 6.2 years, with an irreparable failure occurrence of n=5.9. Laminate veneers had a survival rate of 90.2% over 6.5 years, with an irreparable failure occurrence of n=8.2. Single crowns had a survival rate of 96% over 4.6 years and an irreparable failure of n=2.7. Conversely, fixed partial dentures had a survival rate of 76.1% over 6.5 years with an irreparable failure of n=5.2. CONCLUSIONS Glass-ceramic materials demonstrate relatively high survival rates, indicating that they provide a safe and reliable option for partial coverage restorations, laminate veneers, and single crowns. However, fixed partial dentures had a higher proportion of irreparable failures and a lower survival rate, and caution is required.
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Affiliation(s)
- Brunna M Ferrairo
- Postgraduate student, Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo (USP), Bauru, Brazil
| | - Lucas José de Azevedo-Silva
- Postgraduate student, Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo (USP), Bauru, Brazil
| | - Pedro R Minim
- Postgraduate student, Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo (USP), Bauru, Brazil
| | - Raphaelle S Monteiro-Sousa
- Postgraduate student, Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo (USP), Bauru, Brazil
| | - Leticia F Pereira
- Postgraduate student, Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo (USP), Bauru, Brazil
| | - Sandro B Bitencourt
- Professor, Department of Rehabilitative and Reconstructive Dentistry, School of Dentistry, University of Louisville, Louisville, Ky
| | - Paulo Francisco Cesar
- Associate Professor, Department of Biomaterials and Oral Biology, School of Dentistry, School of Dentistry, University of São Paulo (USP), Bauru, Brazil
| | - Sharanbir K Sidhu
- Full Professor, Institute of Dentistry, Queen Mary, University of London, London, England, UK
| | - Ana Flávia S Borges
- Associate Professor, Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo (USP), Bauru, Brazil.
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Saláta J, Szabó F, Csuti P, Antal M, Márton P, Hermann P, Borbély J, Ábrám E. Quantitative examination of factors influencing the colour reproduction ability of lithium disilicate glass-ceramics. BMC Oral Health 2024; 24:660. [PMID: 38840111 PMCID: PMC11155037 DOI: 10.1186/s12903-024-04429-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Accepted: 05/31/2024] [Indexed: 06/07/2024] Open
Abstract
BACKGROUND Effects of ceramic translucency, layer thickness, and substrate colour on the shade of lithium disilicate glass-ceramic restorations proved to be significant in several studies, however, quantitative, numerical results on the relationship between the colour difference and these parameters are still lacking. The purpose of this in vitro study was to quantitatively determine how the colour reproduction ability of a lithium disilicate glass-ceramic is affected by its translucency, layer thickness, and substrate colour. METHODS Ceramic samples were prepared from A2 shade IPS e.max CAD blocks with high and low translucencies (HT and LT) in a thickness range of 0.5-2.5 mm (+/- 0.05 mm). Layered samples were acquired utilizing composite substrates in 9 shades; transparent try-in paste was used. The spectral reflectance of the specimens was assessed under D65 standard illumination with a Konica Minolta CM-3720d spectrophotometer. The CIEDE2000 colour difference (ΔE00) between two samples was analysed using perceptibility and acceptability thresholds set at 50:50%. Statistical analysis involved linear regression analysis and the Kruskal-Wallis test. RESULTS An increase in the thickness of 0.5 mm reduced the ΔE00 of the HT samples to 72.8%, and that of the T samples to 71.1% (p < 0.0001). 7 substrates with HT and LT specimens had significantly different results from the mean (p < 0.05). A thickness of 0.5 mm is not sufficient to achieve an acceptable result at any level of translucency, while the low translucency ceramic at a thickness of 1.5 mm gave acceptable results, except for severely discoloured substrates (ND8 and ND9). CONCLUSIONS The colour reproduction ability of lithium disilicate glass-ceramics is significantly affected by their translucency, layer thickness, and 7 substrates out of 9 substrates examined.
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Affiliation(s)
- József Saláta
- Department of Prosthodontics, Faculty of Dentistry, Semmelweis University, Szentkirályi Street 47, Budapest, H-1088, Hungary.
- School of PhD Studies, Semmelweis University, Budapest, Hungary.
| | - Ferenc Szabó
- LightingLab Calibration Laboratory Ltd, Veszprém, Hungary
| | - Péter Csuti
- LightingLab Calibration Laboratory Ltd, Veszprém, Hungary
| | - Melinda Antal
- School of PhD Studies, Semmelweis University, Budapest, Hungary
- Faculty of Dentistry, Semmelweis University, Budapest, Hungary
| | - Péter Márton
- School of PhD Studies, Semmelweis University, Budapest, Hungary
- Faculty of Dentistry, Semmelweis University, Budapest, Hungary
| | - Péter Hermann
- Department of Prosthodontics, Faculty of Dentistry, Semmelweis University, Szentkirályi Street 47, Budapest, H-1088, Hungary
| | - Judit Borbély
- Department of Prosthodontics, Faculty of Dentistry, Semmelweis University, Szentkirályi Street 47, Budapest, H-1088, Hungary
| | - Emese Ábrám
- Department of Prosthodontics, Faculty of Dentistry, Semmelweis University, Szentkirályi Street 47, Budapest, H-1088, Hungary
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Song HS, Huh YH, Park CJ, Cho LR, Ko KH. Evaluation of shear bond strength based on substructure materials and ceramic veneering techniques. J Prosthodont 2024. [PMID: 38822528 DOI: 10.1111/jopr.13889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Accepted: 05/15/2024] [Indexed: 06/03/2024] Open
Abstract
PURPOSE Bilayered restorations have both the strength of the substructure material and the esthetics of the veneer material; however, they should have appropriate bonding between the two materials. This study aimed to evaluate the shear bond strength (SBS) according to the substructure material and veneering technique used in bilayered restorations. MATERIALS AND METHODS The experimental group was divided into four groups (n = 15 per group) based on the substructure materials (cobalt-chromium [Co-Cr] alloy and 3 mol% yttrium-stabilized tetragonal zirconia polycrystal [3Y-TZP]) and veneering techniques (pressing and layering). Veneering was performed with disk shape (diameter: 5 mm, height: 2 mm) on a substructure using each veneering technique. Shear stress was applied to the interface of the substructure and the veneering ceramic using a universal testing machine. The shear bond strength, according to the substructure and veneering technique, was analyzed using a two-way analysis of variance with a post-hoc Tukey's honestly significant difference test. The failure mode was observed, and the surface was analyzed using a scanning electron microscope and energy-dispersive spectroscopy. RESULTS The shSBS of the Co-Cr alloy and 3Y-TZP substructure was not different (p > 0.05); however, the pressing technique showed a higher SBS than the layering technique (p < 0.05). The SBS did not differ depending on the veneering technique in the Co-Cr alloys (p > 0.05), whereas the SBS in the pressing technique was higher than that in the layering technique for 3Y-TZP (p < 0.05). In the layering technique, the Co-Cr alloy showed a higher SBS than 3Y-TZP (p < 0.05). In the failure mode, mixed failure occurred most frequently in all groups. Extensive elemental interdiffusion was observed through the opaque layer in the Co-Cr alloy, regardless of the veneering technique. In 3Y-TZP, a wider range of elemental interdiffusion was observed in the pressing technique than in the layering technique. CONCLUSIONS In bilayered restorations with a 3Y-TZP substructure, the pressing technique yielded higher bonding strength than layering. Using the layering technique, 3Y-TZP showed a lower SBS than the Co-Cr alloy. In bilayered restorations using 3Y-TZP as a substructure, the veneering technique and thermal compatibility of the materials must be considered.
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Affiliation(s)
- Han-Sol Song
- Department of Prosthodontics and Research Institute of Oral Science, College of Dentistry, Gangneung-Wonju National University, Gangneung, Republic of Korea
| | - Yoon-Hyuk Huh
- Department of Prosthodontics and Research Institute of Oral Science, College of Dentistry, Gangneung-Wonju National University, Gangneung, Republic of Korea
| | - Chan-Jin Park
- Department of Prosthodontics and Research Institute of Oral Science, College of Dentistry, Gangneung-Wonju National University, Gangneung, Republic of Korea
| | - Lee-Ra Cho
- Department of Prosthodontics and Research Institute of Oral Science, College of Dentistry, Gangneung-Wonju National University, Gangneung, Republic of Korea
| | - Kyung-Ho Ko
- Department of Prosthodontics and Research Institute of Oral Science, College of Dentistry, Gangneung-Wonju National University, Gangneung, Republic of Korea
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Zhu Z, Huang X, Lyu J, Yang X, Tan J, Liu X. Optical properties of monolithic zirconia fabricated with nanoparticle jetting. J Prosthet Dent 2024:S0022-3913(24)00346-9. [PMID: 38796354 DOI: 10.1016/j.prosdent.2024.05.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 05/03/2024] [Accepted: 05/07/2024] [Indexed: 05/28/2024]
Abstract
STATEMENT OF PROBLEM Excellent optical properties are essential for esthetic dental materials. However, the translucency and color masking ability of zirconia fabricated with nanoparticle jetting (NPJ), a type of printed zirconia, are unknown. PURPOSE The purpose of this in vitro study was to evaluate the translucency and color masking ability of zirconia fabricated using NPJ. MATERIAL AND METHODS A total of 90 specimens with thicknesses of 1.5, 1.0, and 0.5 mm were fabricated using high translucent milled zirconia (HT), low translucent milled zirconia (LT), and NPJ. CIELab values (L*, a*, and b*) of the specimens over 7 backgrounds, black, white, VitaB1, VitaA2, VitaA4, gold alloy (Au), and titanium (Ti), were obtained using a spectral radiometer. The relative translucency parameter (RTP) and color difference (∆E) of specimens over VitaB1, VitaA4, Au, and Ti were determined using VitaA2 as the control with the CIEDE2000 color difference equation. The normality of the data distribution was determined using the Shapiro-Wilk test. Differences among groups were analyzed using 2-way analysis of variance and the Student-Newman-Keuls (SNK) post hoc test (α=.05). The ∆E of specimens was analyzed according to perceptibility (∆E=0.8) and acceptability (∆E=1.8) thresholds using the 1 sample t test. The correlation between RTP and ∆E and RTP/∆E and thickness was examined using the Pearson correlation analysis. RESULTS Statistically significant differences were observed in translucency and color masking ability among HT, LT, and NPJ (P<.05). The RTP value was the lowest for zirconia fabricated with NPJ (P<.001) and highest for HT (P<.001). Monolithic zirconia fabricated with NPJ had lower ∆E values than those of HT and LT for the same thickness and background (P<.05). A positive correlation was found in RTP and ∆E (P<.001). A negative correlation was observed in RTP and thickness (P<.001) and ∆E and thickness across a constant background (P<.001). CONCLUSIONS Zirconia fabricated with NPJ was less translucent and had a greater color masking ability for discolored backgrounds than HT and LT.
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Affiliation(s)
- Zhiyao Zhu
- Graduate student, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, PR China
| | - Xinyue Huang
- Graduate student, Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - Jizhe Lyu
- Graduate student, Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - Xu Yang
- Clinical Associate Professor, Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - Jianguo Tan
- Professor, Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - Xiaoqiang Liu
- Clinical Professor, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, PR China.
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Moussa C, Savard G, Rochefort G, Renaud M, Denis F, Daou MH. Fracture Resistance of Direct versus Indirect Restorations on Posterior Teeth: A Systematic Review and Meta-Analysis. Bioengineering (Basel) 2024; 11:536. [PMID: 38927772 PMCID: PMC11201167 DOI: 10.3390/bioengineering11060536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 05/14/2024] [Accepted: 05/21/2024] [Indexed: 06/28/2024] Open
Abstract
The aim of this systematic review and meta-analysis was to compare static compression forces between direct composite resin restorations and indirect restorations for posterior teeth. All studies comparing mechanical properties of direct versus indirect restorations of posterior teeth were included from 2007 up to February 2024. A meta-analysis was conducted for static compression fracture resistance. Medline, Central, and Embase databases were screened. Twenty-four articles were included in the qualitative synthesis, and sixteen studies were finally included in the quantitative synthesis. There was no difference in terms of fracture resistance between direct and indirect restorations for posterior teeth (p = 0.16 for direct and indirect composite resin restorations and p = 0.87 for direct composite resin restorations and indirect ceramic restorations). Also, sub-group analysis with or without cusp coverage in each group revealed no discernable difference. Based on this study, it can be concluded that the choice between direct and indirect restoration approaches may not significantly impact fracture resistance outcomes. There was no statically significant difference between direct and indirect restorations for posterior teeth in all cases of restorations with or without cusp coverage and no matter the used materials. However, to better evaluate these materials, further studies are warranted.
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Affiliation(s)
- Carol Moussa
- Faculty of Dentistry, University of Tours, 37032 Tours, France; (G.S.); (G.R.); (M.R.); (F.D.); (M.H.D.)
- Department of Restorative Dentistry, Faculty of Dental Medicine, Saint-Joseph University, Beirut 1107 2180, Lebanon
- Division of Education, Ethics, Health, Faculty of Medicine, University of Tours, 37044 Tours, France
| | - Guillaume Savard
- Faculty of Dentistry, University of Tours, 37032 Tours, France; (G.S.); (G.R.); (M.R.); (F.D.); (M.H.D.)
- Division of Education, Ethics, Health, Faculty of Medicine, University of Tours, 37044 Tours, France
- Department of Medicine and Bucco-Dental Surgery, Tours University Hospital, 37044 Tours, France
| | - Gael Rochefort
- Faculty of Dentistry, University of Tours, 37032 Tours, France; (G.S.); (G.R.); (M.R.); (F.D.); (M.H.D.)
- INSERM, Imaging Brain & Neuropsychiatry iBraiN U1253, 37032 Tours, France
| | - Matthieu Renaud
- Faculty of Dentistry, University of Tours, 37032 Tours, France; (G.S.); (G.R.); (M.R.); (F.D.); (M.H.D.)
- Department of Medicine and Bucco-Dental Surgery, Tours University Hospital, 37044 Tours, France
- N2C Laboratory, UMR INSERM U 1069, University of Tours, 37032 Tours, France
| | - Frédéric Denis
- Faculty of Dentistry, University of Tours, 37032 Tours, France; (G.S.); (G.R.); (M.R.); (F.D.); (M.H.D.)
- Division of Education, Ethics, Health, Faculty of Medicine, University of Tours, 37044 Tours, France
- Department of Medicine and Bucco-Dental Surgery, Tours University Hospital, 37044 Tours, France
| | - Maha H. Daou
- Faculty of Dentistry, University of Tours, 37032 Tours, France; (G.S.); (G.R.); (M.R.); (F.D.); (M.H.D.)
- Department of Pediatric Dentistry, Faculty of Dental Medicine, Saint Joseph University, Beirut 1107 2180, Lebanon
- Division of Biomaterials, Craniofacial Research Laboratory, Saint Joseph University, Beirut 1107 2180, Lebanon
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Sukkasam C, Kamonkhantikul K, Homsiang W, Arksornnukit M. In vitro damping and strain distribution for implant-supported crowns using 5 different CAD-CAM crowns and 3 different luting cements. J Prosthet Dent 2024; 131:916.e1-916.e9. [PMID: 38443240 DOI: 10.1016/j.prosdent.2024.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 02/09/2024] [Accepted: 02/13/2024] [Indexed: 03/07/2024]
Abstract
STATEMENT OF PROBLEM Dental implants are particularly susceptible to occlusal overloading because, unlike natural teeth, they lack a periodontal ligament to help absorb occlusal forces. However, studies evaluating the impact of different crown and luting materials on the damping behavior and strain distribution of implant-supported crowns are lacking. PURPOSE The purpose of this in vitro study was to investigate the damping behavior and strain distribution of peri-implant bone associated with 5 different CAD-CAM implant-supported crowns and 3 luting materials. MATERIAL AND METHODS A titanium implant was embedded in a plastic tube with epoxy resin and 5 different crown materials (polymethyl methacrylate, resin-infiltrated ceramic, lithium disilicate, titanium, and zirconia) luted to prosthetic abutments with 3 different luting materials (zinc oxide non-eugenol cement, zinc phosphate cement, and adhesive resin cement) and an uncemented condition were tested (n=5). Strain gauges were attached at the crestal and apical levels of the implant model. All specimens were load tested from 0 to 200 N. Slopes of load/time, microstrain/time, and time required to reach the maximum load were examined to represent the damping behavior. Absolute maximum strain (AMS) and its occurrence level were examined to represent the strain distribution. Two-way ANOVA, followed by the Tukey HSD test, were used for statistical analysis (α=.05). RESULTS All slopes and times to reach the maximum load in each crown material were statistically similar (P>.05), except for the polymethyl methacrylate group, which showed less steepness in all slopes and more time required to reach the maximum load significantly (P<.05). Both the polymethyl methacrylate group (224.5 ±30.2) and the titanium group (224.0 ±24.3) exhibited significantly higher AMS at the crestal level compared with the resin-infiltrated ceramic group (210.6 ±5.0) (P<.05). The lithium disilicate (218.1 ±15.0) and zirconia groups (217.3 ±14.8) demonstrated comparable AMS values with the others (P>.05). The uncemented group demonstrated steeper slopes and less time required to reach the maximum load compared with the adhesive resin group (P<.05), while slopes and times of the zinc phosphate and zinc oxide non-eugenol groups were comparable (P>.05). The uncemented group (242.7 ±25.3) exhibited significantly higher AMS at the crestal level than the other groups (P<.05). CONCLUSIONS The crown material significantly affected the damping behavior of peri-implant bone, unlike the luting material. Polymethyl methacrylate with a high damping behavior exhibited high strain at the crestal level. In contrast, resin-modified ceramic with a moderate damping behavior exhibited low strain at the crestal level. Strain at the crestal level could be effectively reduced by approximately 13% through cementation.
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Affiliation(s)
- Charnikan Sukkasam
- Postgraduate student, Department of Prosthodontics, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Krid Kamonkhantikul
- Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand.
| | - Woraporn Homsiang
- Lecturer, Department of Family and Community Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Mansuang Arksornnukit
- Professor, Department of Prosthodontics, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
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Floriani F, Coelho NF, de Azevedo Linhares L, Stolf SC, Lopes GC. Semidirect Resin Composite Veneers in a Patient with Bruxism. Case Rep Dent 2024; 2024:5572481. [PMID: 38560367 PMCID: PMC10980552 DOI: 10.1155/2024/5572481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 02/18/2024] [Accepted: 02/28/2024] [Indexed: 04/04/2024] Open
Abstract
This case report details the esthetic rehabilitation of a 32-year-old male patient suffering from sleep bruxism, primarily manifesting as a fracture and significant loss of tooth structure in the anterior maxillary central incisors. To address these concerns, the patient underwent a restorative treatment involving the application of semidirect resin composite veneers on the maxillary incisors and direct resin composite restoration on the incisal regions of the maxillary canines. This approach not only restored the functional integrity of the teeth but also significantly enhanced the patient's esthetic appearance.
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Affiliation(s)
- Franciele Floriani
- University of Iowa, Prosthodontics Department, Iowa, USA
- Federal University of Santa Catarina, Florianópolis, Brazil
| | | | | | - Sheila Cristina Stolf
- Department of Operative Dentistry, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Guilherme Carpena Lopes
- Department of Operative Dentistry, Federal University of Santa Catarina, Florianópolis, Brazil
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Solís Pinargote NW, Yanushevich O, Krikheli N, Smirnov A, Savilkin S, Grigoriev SN, Peretyagin P. Materials and Methods for All-Ceramic Dental Restorations Using Computer-Aided Design (CAD) and Computer-Aided Manufacturing (CAM) Technologies-A Brief Review. Dent J (Basel) 2024; 12:47. [PMID: 38534271 DOI: 10.3390/dj12030047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 12/21/2023] [Accepted: 01/03/2024] [Indexed: 03/28/2024] Open
Abstract
The materials used in dentistry for the fabrication of all-ceramic restorations have undergone great and rapid developments over the last two decades. Among the most common ceramic materials in dentistry are those based on zirconium and lithium disilicate. Due to the properties of these materials, they are in great demand in the field of dental restoration production. Thus, dental restorations that will use those materials are commonly machined in CAD/CAM systems, which offer the possibility of manufacturing all-ceramic dental restorations in a very short period of time. This article reviews the modern materials in the field of all-ceramic dental restorations, their manufacturing processes, as well as what determines which ceramic materials are used for the production of CAD/CAM blanks and their production technology.
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Affiliation(s)
- Nestor Washington Solís Pinargote
- Federal State Budgetary Educational Institution of the Higher Education Moscow State University of Technology "STANKIN", 127055 Moscow, Russia
| | - Oleg Yanushevich
- Federal State Budgetary Educational Institution of the Higher Education "A.I. Yevdokimov Moscow State University of Medicine and Dentistry" of the Ministry of Healthcare of the Russian Federation, 127473 Moscow, Russia
| | - Natella Krikheli
- Federal State Budgetary Educational Institution of the Higher Education "A.I. Yevdokimov Moscow State University of Medicine and Dentistry" of the Ministry of Healthcare of the Russian Federation, 127473 Moscow, Russia
| | - Anton Smirnov
- Federal State Budgetary Educational Institution of the Higher Education Moscow State University of Technology "STANKIN", 127055 Moscow, Russia
| | - Sergey Savilkin
- Federal State Budgetary Educational Institution of the Higher Education Moscow State University of Technology "STANKIN", 127055 Moscow, Russia
| | - Sergey N Grigoriev
- Federal State Budgetary Educational Institution of the Higher Education Moscow State University of Technology "STANKIN", 127055 Moscow, Russia
| | - Pavel Peretyagin
- Federal State Budgetary Educational Institution of the Higher Education Moscow State University of Technology "STANKIN", 127055 Moscow, Russia
- Federal State Budgetary Educational Institution of the Higher Education "A.I. Yevdokimov Moscow State University of Medicine and Dentistry" of the Ministry of Healthcare of the Russian Federation, 127473 Moscow, Russia
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10
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da Rosa LS, Pilecco RO, Soares PM, Rippe MP, Pereira GKR, Valandro LF, Kleverlaan CJ, Feilzer AJ, Tribst JPM. Repair protocols for indirect monolithic restorations: a literature review. PeerJ 2024; 12:e16942. [PMID: 38406292 PMCID: PMC10893862 DOI: 10.7717/peerj.16942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 01/23/2024] [Indexed: 02/27/2024] Open
Abstract
Despite the advancements in indirect monolithic restorations, technical complications may occur during function. To overcome this issues, intraoral repair using resin composite is a practical and low-cost procedure, being able to increase the restoration's longevity. This review aimed to evaluate the need for repair and suggest a standardized repair protocol to the main indirect restorative materials. For this, studies were surveyed from PubMed with no language or date restriction, to investigate the scientific evidence of indirect monolithic restoration repair with direct resin composite. A classification to guide clinical decisions was made based on the FDI World Dental Federation criteria about defective indirect restorations considering esthetic and functional standards, along with the patient's view, to decide when polishing, repairing or replacing a defective restoration. Based on 38 surveyed studies, different resin composite intraoral repair protocols, that included mechanical and chemical aspects, were defined depending on the substrate considering resin-based, glass-ceramic or zirconia restorations. The presented criteria and protocols were developed to guide the clinician's decision-making process regarding defective indirect monolithic restorations, prolonging longevity and increasing clinical success.
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Affiliation(s)
| | | | | | | | | | | | - Cornelis Johannes Kleverlaan
- Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam en Vrije Universiteit, Amsterdam, the Netherlands
| | - Albert J. Feilzer
- Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam en Vrije Universiteit, Amsterdam, the Netherlands
| | - João Paulo Mendes Tribst
- Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam en Vrije Universiteit, Amsterdam, the Netherlands
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11
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Benalcazar-Jalkh EB, Cunha VS, Bergamo ETP, Alves LMM, de Monteiro-Sousa RS, Campos TMB, Tanaka R, Marcolino GDA, Souza FMD, Bonfante EA. Finishing technique effect on strength of zirconia-reinforced lithium silicate ceramic. Eur J Oral Sci 2024; 132:e12964. [PMID: 38062529 DOI: 10.1111/eos.12964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 11/14/2023] [Indexed: 01/25/2024]
Abstract
The aim of this study was to evaluate the effect of two finishing techniques, glazing or polishing, in comparison with the as-cut condition, on the biaxial-flexural-strength (BFS) of a zirconia-reinforced lithium silicate ceramic (ZLS). Cylinders were milled from CAD/CAM blocks and sliced to obtain disc-shaped specimens (ISO6872:2015). Polished and glazed specimens were processed following the manufacturer's instructions. Thirty-three specimens were obtained for each condition and microstructural and BFS/fractographic characterizations were performed. BFS and roughness data were analyzed using Weibull statistics and ANOVA one-way with Tukey post-hoc test, respectively. While a rougher surface was observed for as-cut specimens, smoother surfaces were observed for polished and glazed ZLS at microscopical evaluation and confirmed through surface-roughness evaluation. X-ray spectra depicted a glass phase for all groups and characteristic metasilicate, lithium disilicate, and lithium phosphate peaks for the as-cut and polished specimens. Glazed specimens showed higher characteristic strength than polished and as-cut specimens, which did not differ significantly. While higher Weibull-modulus was observed for the polished than for the as-cut specimens, no statistically significant differences were noted between glazed and polished, and between glazed and as-cut specimens. ZLS presents higher strength when glazed, and polishing increases the structural reliability of the material relative to the as-cut condition. Both finishing techniques reduced surface roughness similarly.
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Affiliation(s)
| | - Verena Souza Cunha
- Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Sao Paulo, Brazil
| | - Edmara Tatiely Pedroso Bergamo
- Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Sao Paulo, Brazil
- Biomaterials Division, NYU Dentistry, New York, USA
- Department of Prosthodontics, NYU Dentistry, New York, USA
| | - Larissa Marcia Martins Alves
- Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Sao Paulo, Brazil
| | | | - Tiago Moreira Bastos Campos
- Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Sao Paulo, Brazil
| | | | - Giovana de Assis Marcolino
- Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Sao Paulo, Brazil
| | - Felipe Machado de Souza
- Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Sao Paulo, Brazil
| | - Estevam Augusto Bonfante
- Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Sao Paulo, Brazil
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12
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Borouziniat A, Majidinia S, Shirazi AS, Kahnemuee F. Comparison of bond strength of self-adhesive and self-etch or total-etch resin cement to zirconia: A systematic review and meta-analysis. JOURNAL OF CONSERVATIVE DENTISTRY AND ENDODONTICS 2024; 27:113-125. [PMID: 38463466 PMCID: PMC10923229 DOI: 10.4103/jcde.jcde_225_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 11/12/2023] [Accepted: 12/11/2023] [Indexed: 03/12/2024]
Abstract
The aim of this study was to systematically compare the bond strength of self-adhesive and self-etch or total-etch resin cement to zirconia. The PubMed, ISI (all), and Scopus databases were searched for the selected keywords up to November 1, 2021, without date or language restrictions. In vitro studies comparing the bond strength of self-adhesive and self-etch or total-etch resin cement to zirconia were eligible for inclusion in the study. The selected articles were divided into four groups based on the type of resin cement and the storage time. Statistical analysis was performed using the Biostat Comprehensive Meta-Analysis Software version 2 (α = 0.05). The effect of conventional cement ( Glass Ionomer (GI), Resin Modified Glass Ionomer (RMGI) and zinc phosphate) was analyzed using descriptive analysis. The initial search yielded 376 articles, of which 26 were selected after a methodological assessment. Two reviewers independently extracted data and assessed the risk of bias. The results showed that the immediate or delay bond strength of the self-adhesive resin cement to zirconia has no significant difference with the bond strength of self-etch resin cement to zirconia. The immediate and delay bond strength of total-etch cement-zirconia was significantly lower than that of self-adhesive cement-zirconia (P = 0.00). A descriptive analysis of the selected articles showed that the bond strength of self-adhesive resin cement to zirconia was significantly higher than total-etch cement. The results of the meta-analysis showed that both self-adhesive and self-etch resin cement (if applied according to their manufacturer's instruction) are suitable for bonding to zirconia.
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Affiliation(s)
- Alireza Borouziniat
- Associate Professor, Dental Research Center, Mashhad Dental School, Mashhad, Iran
| | - Sara Majidinia
- Dental Materials Research Center, Mashhad Dental School, Mashhad, Iran
| | - Alireza Sarraf Shirazi
- Department of Pediatric Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Fatemeh Kahnemuee
- Department of Orthodontics, Zahedan Dental School, Zahedan University of Medical Science, Zahedan, Iran
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13
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Elmoselhy HAS, Hassanien OES, Haridy MF, Salam El Baz MAE, Saber S. Two‑year clinical performance of indirect restorations fabricated from CAD/CAM nano hybrid composite versus lithium disilicate in mutilated vital teeth. A randomized controlled trial. BMC Oral Health 2024; 24:101. [PMID: 38233771 PMCID: PMC10792922 DOI: 10.1186/s12903-023-03847-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Accepted: 12/31/2023] [Indexed: 01/19/2024] Open
Abstract
TRIAL DESIGN This is a randomized, controlled, superiority, double-blinded, parallel-group, two-arms trial with an allocation ratio of 1:1. The aim of this trial was to compare the two-year clinical performance of partial indirect restorations fabricated from CAD/CAM nano-hybrid composite and ceramic lithium disilicate blocks using the modified USPHS criteria. METHODS In two parallel groups (n = 50 restorations), fifty participants having mutilated vital teeth with a minimum of two remaining walls were randomly enrolled in this trial and received indirect restorations of either nano-hybrid composite resin blocks (Brilliant, Coltene, Switzerland) or Lithium Disilicate (IPS Emax CAD). The restorations were assessed using modified USPHS criteria by two independent blinded assessors at baseline, six months, one-year and two years follow-up visits. Categorical and ordinal data were presented as frequencies and percentages. Categorical data were analyzed using the chi-square test. Ordinal data were analyzed using the Mann-Whitney U test for intergroup comparisons and Freidman's test followed by the Nemenyi post hoc test for intragroup comparisons. Numerical data were presented as mean and standard deviation values. They were analyzed for normality using the Shapiro-Wilk test. Data were found to be normally distributed and were analyzed using the independent t-test. The significance level was set at p ≤ 0.05 within all tests. RESULTS Forty-eight participants received the allocated intervention and completed the follow-up periods. There was a statistically significant difference between both tested materials for all USPHS criteria regarding Marginal integrity and Marginal discoloration at six-months Follow-up, but with no statistically significant difference at one- and two-year follow-up. CONCLUSIONS Both materials showed an acceptable, successful clinical performance along the two-years follow-up period. CLINICAL RELEVANCE The CAD/CAM nano-hybrid composite blocks are as reliable as Lithium disilicate for restoring mutilated vital teeth.
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Affiliation(s)
- Haneen Ahmad Shafik Elmoselhy
- Conservative Dentistry Department, Faculty of Dentistry, The British University in Egypt, Suez Desert Road El Sherouk City, Egypt
| | | | - Mohamed Fouad Haridy
- Conservative Dentistry, Faculty of Dentistry, Cairo University and The British University in Egypt, Suez Desert Road El Sherouk City, Egypt
| | | | - Shehabeldin Saber
- Endodontics, Faculty of Dentistry, Ain Shams University and The British University in Egypt, Suez Desert Road El Sherouk City, Egypt.
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14
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Liu X, Yao X, Zhang R, Sun L, Zhang Z, Zhao Y, Zhang T, Yan J, Zhang Y, Wu X, Li B. Recent advances in glass-ceramics: Performance and toughening mechanisms in restorative dentistry. J Biomed Mater Res B Appl Biomater 2024; 112:e35334. [PMID: 37776023 DOI: 10.1002/jbm.b.35334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 09/13/2023] [Accepted: 09/18/2023] [Indexed: 10/01/2023]
Abstract
The use of glass-ceramics in the medical field has grown significantly since the 1980s. With excellent aesthetic properties, semi-translucency, outstanding mechanical properties, corrosion resistance, wear resistance and great biocompatibility and workability glass-ceramics is one of the most commonly used materials in restorative dentistry and is widely used in veneers, inlays, onlays, all-ceramic crowns, and implant abutments. This review provides an overview of the research progress of glass-ceramics in restorative dentistry, focusing on the classification, performance requirements, toughening mechanisms and their association with clinical performance, as well as the manufacturing and fabrication of glass-ceramics in restorative dentistry. Finally, the developments and prospects of glass-ceramics in restorative dentistry are summarized and discussed.
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Affiliation(s)
- Xiaoming Liu
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan, Shanxi, China
| | - Xuemin Yao
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan, Shanxi, China
| | - Ran Zhang
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan, Shanxi, China
| | - Lingxiang Sun
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan, Shanxi, China
| | - Zheyuan Zhang
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan, Shanxi, China
| | - Yifan Zhao
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan, Shanxi, China
| | - Tong Zhang
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan, Shanxi, China
| | - Jingyu Yan
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan, Shanxi, China
| | - Yanjie Zhang
- Research Institute of Photonics, Dalian Polytechnic University, Dalian, Liaoning, China
| | - Xiuping Wu
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan, Shanxi, China
| | - Bing Li
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan, Shanxi, China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Taiyuan, Shanxi, China
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15
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Freitas JS, Souza LFB, Dellazzana FZ, Silva TMRD, Ribeiro L, Pereira GKR, May LG. Advanced lithium disilicate: A comparative evaluation of translucency and fatigue failure load to other ceramics for monolithic restorations. J Mech Behav Biomed Mater 2023; 148:106192. [PMID: 37865017 DOI: 10.1016/j.jmbbm.2023.106192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/12/2023] [Accepted: 10/13/2023] [Indexed: 10/23/2023]
Abstract
The aim of this in vitro study was to evaluate the surface roughness, translucency, fatigue failure load (FFL), and number of cycles for fatigue failure (CFF) of a recently released lithia-based material called advanced lithium disilicate and three other ceramics indicated for monolithic restorations. First, ALD (advanced lithium disilicate, CEREC Tessera, Dentsply Sirona), LD (lithium disilicate, IPS e. max CAD, Ivoclar), LS (lithium silicate-disilicate, Suprinity, Vita Zahnfabrik), and 4Y-PSZ (Yttria-stabilized zirconia, IPS e.max ZirCAD MT, Ivoclar) discs (n = 15, Ø = 10 mm and thickness = 1.0 mm) were fabricated from CAD/CAM blocks/discs, A2 shade. The discs were sintered/crystallized and subsequently analyzed by a rugosimeter (Mitutoyo SJ-410) to determine Ra and Rz surface roughness parameters. Next, they were evaluated to determine the translucency parameter (TP) using a bench-top spectrophotometer (SP60, EX-Rite). The discs were subsequently cemented to glass fiber epoxy resin discs, and the specimens were tested under cyclic loading (Step-test), immersed in distilled water at a frequency of 20 Hz, with an initial cyclic load of 200 N for 5,000 cycles and increments of 50 N every 10,000 cycles until failure. Fatigue failure load (FFL) and number of cycles for fatigue failure (CFF) were recorded for subsequent Kaplan Meier analysis, with post-hoc Mantel-Cox and Weibull analysis (α = 0.05). Complementary fractographic, topographic and energy dispersive spectroscopy analyses (EDS) were performed. 4Y-PSZ showed higher survival (p < 0.05), with higher FFL and CFF (1077 N; 180,333 cycles), followed by LD (980 N; 161,000 cycles), LS (937 N; 152,333 cycles) and ALD (910 N; 147,000 cycles). No differences were observed between the tested groups regarding Weibull modulus. ALD presented TP (28.14) equal to DL (28.27) and higher than LS (25.51). All lithia-based materials had higher translucency than 4Y-PSZ (TP = 8.62) (p < 0.05). ALD appears to have a similar elemental composition to LD and LSD for oxygen and silicon. ALD and LSD have a similar zirconium content. Fractures originated on the cemented surface of the ceramic discs. Lithia-based ceramics showed lower surface roughness, with ALD (Ra = 0.04 μm; Rz = 0.66 μm) showing the lowest values (p < 0.05). Despite showing lower FFL when compared to LD and 4Y-PSZ, ALD has compatible translucency and mechanical fatigue performance with its indication for fabricating monolithic, anterior and posterior adhesively cemented single-unit restorations. However, further studies are needed to substantiate its clinical performance.
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Affiliation(s)
- Júlia Saccol Freitas
- MScD and PhD Post-Graduate Program in Oral Science, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil.
| | - Luiza Freitas Brum Souza
- MScD and PhD Post-Graduate Program in Oral Science, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil.
| | - Fernando Zurlo Dellazzana
- Faculty of Denstistry, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil.
| | | | - Luiza Ribeiro
- Faculty of Denstistry, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil.
| | - Gabriel Kalil Rocha Pereira
- MScD and PhD Post-Graduate Program in Oral Science, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil.
| | - Liliana Gressler May
- MScD and PhD Post-Graduate Program in Oral Science, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil.
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16
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Urkande NK, Mankar N, Nikhade PP, Chandak M. Understanding the Complexities of Cast Post Retention: A Comprehensive Review of Influential Factors. Cureus 2023; 15:e51258. [PMID: 38288201 PMCID: PMC10823198 DOI: 10.7759/cureus.51258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Accepted: 12/27/2023] [Indexed: 01/31/2024] Open
Abstract
This comprehensive review delves into the intricate landscape of cast post retention in restorative dentistry, encompassing historical perspectives, contemporary techniques, and future directions. Examining factors ranging from tooth-related considerations to prosthesis-related dynamics, the review provides a detailed analysis of clinical techniques, including step-by-step procedures, common challenges, and innovative advancements. Technological breakthroughs, such as digital impressions, computer-aided design and computer-aided manufacturing (CAD/CAM) technology, three-dimensional (3D) printing, and finite element analysis, are explored for their transformative impact on precision and customization. The discussion extends to the promising future of cast post retention, emphasising emerging materials, the integration of artificial intelligence in treatment planning, and patient-specific approaches. Implications for clinical practice underscore the importance of individualised treatment planning and the adoption of advanced technologies. Recommendations for future research advocate for comprehensive long-term clinical studies, investigations into AI-driven treatment planning, and a focus on patient outcomes and satisfaction. This review consolidates existing knowledge and anticipates a future marked by enhanced precision, individualised care, and improved long-term success in cast post-retained restorations.
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Affiliation(s)
- Neha K Urkande
- Conservative Dentistry and Endodontics, Sharad Pawar Dental College and Hospital, Datta Meghe Institute of Higher Education & Research, Wardha, IND
| | - Nikhil Mankar
- Conservative Dentistry and Endodontics, Sharad Pawar Dental College and Hospital, Datta Meghe Institute of Higher Education & Research, Wardha, IND
| | - Pradnya P Nikhade
- Conservative Dentistry and Endodontics, Sharad Pawar Dental College and Hospital, Datta Meghe Institute of Higher Education & Research, Wardha, IND
| | - Manoj Chandak
- Conservative Dentistry and Endodontics, Sharad Pawar Dental College and Hospital, Datta Meghe Institute of Higher Education & Research, Wardha, IND
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17
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Kui A, Manziuc M, Petruțiu A, Buduru S, Labuneț A, Negucioiu M, Chisnoiu A. Translucent Zirconia in Fixed Prosthodontics-An Integrative Overview. Biomedicines 2023; 11:3116. [PMID: 38137337 PMCID: PMC10740999 DOI: 10.3390/biomedicines11123116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 11/12/2023] [Accepted: 11/15/2023] [Indexed: 12/24/2023] Open
Abstract
Over the past two decades, dental ceramics have experienced rapid advances in science and technology, becoming the fastest-growing field of dental materials. This review emphasizes the significant impact of translucent zirconia in fixed prosthodontics, merging aesthetics with strength, and highlights its versatility from single crowns to complex bridgework facilitated by digital manufacturing advancements. The unique light-conducting properties of translucent zirconia offer a natural dental appearance, though with considerations regarding strength trade-offs compared to its traditional, opaque counterpart. The analysis extends to the mechanical attributes of the material, noting its commendable fracture resistance and durability, even under simulated physiological conditions. Various zirconia types (3Y-TZP, 4Y-TZP, 5Y-TZP) display a range of strengths influenced by factors like yttria content and manufacturing processes. The study also explores adhesive strategies, underlining the importance of surface treatments and modern adhesives in achieving long-lasting bonds. In the realm of implant-supported restorations, translucent zirconia stands out for its precision, reliability, and aesthetic adaptability, proving suitable for comprehensive dental restorations. Despite its established benefits, the review calls for ongoing research to further refine the material's properties and adhesive protocols and to solidify its applicability through long-term clinical evaluations, ensuring its sustainable future in dental restorative applications.
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Affiliation(s)
- Andreea Kui
- Prosthetic Dentistry and Dental Materials Department, Iuliu Hatieganu University of Medicine and Pharmacy, 32 Clinicilor Street, 400006 Cluj-Napoca, Romania; (A.K.); (A.C.)
| | - Manuela Manziuc
- Prosthetic Dentistry and Dental Materials Department, Iuliu Hatieganu University of Medicine and Pharmacy, 32 Clinicilor Street, 400006 Cluj-Napoca, Romania; (A.K.); (A.C.)
| | - Adrian Petruțiu
- Oral Rehabilitation Department, Iuliu Hatieganu University of Medicine and Pharmacy, 13 Victor Babes Street, 400008 Cluj-Napoca, Romania
| | - Smaranda Buduru
- Prosthetic Dentistry and Dental Materials Department, Iuliu Hatieganu University of Medicine and Pharmacy, 32 Clinicilor Street, 400006 Cluj-Napoca, Romania; (A.K.); (A.C.)
| | - Anca Labuneț
- Prosthetic Dentistry and Dental Materials Department, Iuliu Hatieganu University of Medicine and Pharmacy, 32 Clinicilor Street, 400006 Cluj-Napoca, Romania; (A.K.); (A.C.)
| | - Marius Negucioiu
- Prosthetic Dentistry and Dental Materials Department, Iuliu Hatieganu University of Medicine and Pharmacy, 32 Clinicilor Street, 400006 Cluj-Napoca, Romania; (A.K.); (A.C.)
| | - Andrea Chisnoiu
- Prosthetic Dentistry and Dental Materials Department, Iuliu Hatieganu University of Medicine and Pharmacy, 32 Clinicilor Street, 400006 Cluj-Napoca, Romania; (A.K.); (A.C.)
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18
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Gershater E, Griswold O, Talsania BE, Zhang Y, Chung CH, Zheng Z, Li C. Effects of Plasma Treatment on the Strength of Bonding to Ceramic Surfaces in Orthodontics-A Comprehensive Review. Bioengineering (Basel) 2023; 10:1323. [PMID: 38002447 PMCID: PMC10669322 DOI: 10.3390/bioengineering10111323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 11/10/2023] [Accepted: 11/14/2023] [Indexed: 11/26/2023] Open
Abstract
Over the past several decades, orthodontic treatment has been increasingly sought out by adults, many of whom have undergone restorative dental procedures that cover enamel. Because the characteristics of restorative materials differ from those of enamel, typical bonding techniques do not yield excellent restoration-bracket bonding strengths. Plasma treatment is an emerging surface treatment that could potentially improve bonding properties. The purpose of this paper is to evaluate currently available studies assessing the effect of plasma treatment on the shear bond strength (SBS) and failure mode of resin cement/composite on the surface of ceramic materials. PubMed and Google Scholar databases were searched for relevant studies, which were categorized by restorative material and plasma treatment types that were evaluated. It was determined that cold atmospheric plasma (CAP) treatment using helium and H2O gas was effective at raising the SBS of feldspathic porcelain to a bonding agent, while CAP treatment using helium gas might also be a potential treatment method for zirconia and other types of ceramics. More importantly, CAP treatment using helium has the potential for being carried out chairside due to its non-toxicity, low temperature, and short treatment time. However, because all the studies were conducted in vitro and not tested in an orthodontic setting, further research must be conducted to ascertain the effectiveness of specific plasma treatments in comparison to current orthodontic bonding treatments in vivo.
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Affiliation(s)
- Elizabeth Gershater
- Division of Orthodontics, College of Dental Medicine, Columbia University, New York, NY 10032, USA
| | - Olivia Griswold
- Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Brooke E. Talsania
- School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Yu Zhang
- Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Chun-Hsi Chung
- Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Zhong Zheng
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Chenshuang Li
- Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
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19
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Zancopé K, Borges G, Ribeiro M, Miranda RR, Peres TS, Soares CJ. Influence of Mono- and Multiwave Light-curing Units on the Microhardness and Degree of Conversion of Light-cured Resin Cements. Oper Dent 2023; 48:711-719. [PMID: 37881034 DOI: 10.2341/23-039-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/10/2023] [Indexed: 10/27/2023]
Abstract
OBJECTIVES This study evaluated the Knoop hardness (KH, N/mm2) and degree of conversion (DC, %) on the margins of light-cured resin cements with different photoinitiators using a single light-curing unit (LCU) with two heads (mono- and multiwave). METHODS AND MATERIALS Three types of resin cements were used with different photoinitiators: Megalink Esthetic (Odontomega, São Paulo, Brazil) with a camphorquinone photoinitiator; Allcem Veneer (FGM, Joinville, Brazil) with the Advanced Polymerization system (APS), and Variolink Esthetic LC (Ivoclar Vivadent, Schaan, Liechtenstein). Thirty samples were collected and divided into six groups (n=5 each). The resin cement samples were made into the shape of a maxillary right central incisor and photoactivated under a 0.5-mm-thick ceramic sheet. A single LCU (Radii Xpert, SDI) with two heads (mono- and multiwave) was used. The tip of the LCU was positioned at the center of the sample in a standardized manner. Raman spectroscopy was performed to evaluate the DC, and KH was evaluated through the Knoop microhardness test. Five regions were evaluated: cervical, mesial, buccal (center), distal, and incisal. RESULTS There was a significant difference in the DC only for the type of cement (p<0.001), indicating that the cement with the APS photoinitiator presented excellent results. There were significant differences in the type of cement (p<0.001), type of light (p<0.001), region (p<0.001), and the interaction between the type of cement and type of light (p<0.001). The resin cement with the APS photoinitiator cured with monowave light showed the highest KH values. The beam profiles of all groups, with and without the interposition of ceramic and resin cement, were examined by light transmission. CONCLUSIONS The cement with the APS photoinitiator presented the best results with respect to the DC and KH. In comparison with mono- and multiwaves, the LCU may not be a determining factor for the properties of light-cured resin cements. The buccal region showed the best results for DC and KH, indicating the need for a greater amount of light-curing at the cementation margins.
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Affiliation(s)
- K Zancopé
- *Karla Zancopé, DDS, MSc, PhD, professor, Department of Occlusion, Fixed Prosthesis and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Gcs Borges
- Giovanna C S Borges, DDS, MS, Department of Occlusion, Fixed Prosthesis and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Mth Ribeiro
- Maria Tereza H Ribeiro, DDS, MS, PhD student, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - R R Miranda
- Rafael R Miranda, DDS, MS, PhD, professor, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - T S Peres
- Thiago S Peres, DDS, MS, PhD student, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - C J Soares
- Carlos J Soares, DDS, MS, PhD, professor and chair, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil
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20
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Alamoush RA, Yang J, Alhotan A, Haider J, Matinlinna JP, Elraggal A. The effect of in-office bleaching agents on the Vickers hardness and surface topography of polished and unpolished CAD/CAM composite materials. Sci Rep 2023; 13:15341. [PMID: 37714943 PMCID: PMC10504265 DOI: 10.1038/s41598-023-42415-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Accepted: 09/10/2023] [Indexed: 09/17/2023] Open
Abstract
In-office bleaching, using hydrogen peroxide, is effective to remove dental enamel stains. However, bleaching agents can deteriorate surface properties of CAD-CAM materials. This in vitro study aimed to investigate the effect of in-office bleaching agents on Vickers hardness and surface topography of polished and unpolished dental CAD-CAM composite materials (Grandio blocs, Lava Ultimate, BRILLIANT Crios, Cerasmart), and a polymer-infiltrated ceramic network block (Vita Enamic). The specimens were randomly divided into two groups: unpolished or polished. The micro-hardness and surface topography of each group were measured before bleaching, after a 60 min bleaching period, and 24-h and one-month post-bleaching. In-office bleaching significantly influenced the Vickers hardness of both the polished and unpolished CAD/CAM composite blocks, with Vita Enamic exhibiting the least hardness stability among all groups. Furthermore, in-office bleaching significantly influenced the surface roughness of unpolished CAD/CAM composite blocks. There was a significant difference in hardness reduction between the polished and unpolished specimens for most of the investigated materials at different time points. The bleaching did not influence the surface roughness of the investigated polished group, except for Vita Enamic and Lava Ultimate. However, it did influence the surface roughness of the investigated materials in the unpolished group.
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Affiliation(s)
- Rasha A Alamoush
- Department of Fixed and Removable Prosthodontics, School of Dentistry, The University of Jordan, Amman, 11942, Jordan
| | - Jiawei Yang
- Department of Prosthodontics, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- National Clinical Research Center for Oral Diseases, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Abdulaziz Alhotan
- Department of Dental Health, College of Applied Medical Sciences, King Saud University, 11545, Riyadh, Saudi Arabia
| | - Julfikar Haider
- Department of Engineering, Manchester Metropolitan University, Manchester, M1 5GD, UK
- Division of Dentistry, School of Medical Sciences, The University of Manchester, Manchester, M13 9PL, UK
| | - Jukka P Matinlinna
- Division of Dentistry, School of Medical Sciences, The University of Manchester, Manchester, M13 9PL, UK
| | - Alaaeldin Elraggal
- Operative Dentistry, Conservative Dentistry Department, Faculty of Dentistry, Alexandria University, Alexandria, Egypt.
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Dai K, Wu J, Zhao Z, Yu H, Zhao Z, Gao B. Surface Texture Designs to Improve the Core-Veneer Bond Strength of Zirconia Restorations Using Digital Light Processing. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6072. [PMID: 37763350 PMCID: PMC10650084 DOI: 10.3390/ma16186072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 08/17/2023] [Accepted: 09/01/2023] [Indexed: 09/29/2023]
Abstract
Veneered zirconia ceramics are widely used for dental restorations. However, the relatively poor bonding strength between the ceramic core and veneer porcelain remains a common problem in clinical applications. To address this issue, this study focused on enhancing the core-veneer bond strength of zirconia restorations through the implementation of surface textures using digital light processing (DLP) technology. The light intensity was precisely tuned to optimize mechanical strength and minimize light scattering. Subsequently, hexagonal or square grids were printed on the surface of the zirconia ceramic core. Following veneering procedures, the shear bond strength (SBS) test was conducted using a universal testing machine. Dates were compared using analysis of variance (ANOVA) and the least significant difference (LSD) test. Furthermore, optical microscopy and scanning electron microscopy (SEM) were used to examine the failure modes and observe the cross-sectional structures, respectively. The results indicated that the presence of a 0.09 mm high hexagon grid led to a significant 21% increase in the SBS value. However, grids with heights of 0.2 and 0.3 mm showed less improvement, owing to the formation of large defects at the interface during the fusion process. This study demonstrated the potential of DLP technology in preparing zirconia ceramics with complex structures and high mechanical strength, thereby offering promising solutions for overcoming challenges associated with dental applications.
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Affiliation(s)
- Kang Dai
- State Key Laboratory of Military Stomatology & National Clinical Research Centre for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
| | - Jiang Wu
- State Key Laboratory of Military Stomatology & National Clinical Research Centre for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
| | - Zhen Zhao
- State Key Laboratory of Military Stomatology & National Clinical Research Centre for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
| | - Hai Yu
- State Key Laboratory of Military Stomatology & National Clinical Research Centre for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
| | - Zhe Zhao
- School of Material Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Bo Gao
- State Key Laboratory of Military Stomatology & National Clinical Research Centre for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
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Nogueira VDF, Rodrigues CDS, Grangeiro MTV, Contreras LPC, Marinho RMDM, Bottino MA. Interface adhesion on layered zirconia: Effects of the veneering ceramic material and veneering technique. J Prosthodont 2023. [PMID: 37626443 DOI: 10.1111/jopr.13756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 08/21/2023] [Accepted: 08/21/2023] [Indexed: 08/27/2023] Open
Abstract
PURPOSE To evaluate the effect of different veneering ceramics and veneering techniques on the bond strength to zirconia. MATERIALS AND METHODS 3Y-TZP zirconia blocks were sliced into 60 slabs, polished, and sintered. Each slab received one ceramic cylinder (Ø = 3.4 mm, 5 mm-high), according to the veneering ceramic type (feldspathic-FEL or lithium disilicate-based-LD) and the veneering technique (file-splitting with resin-based luting agent-RC, file-splitting with fusion ceramic-FC, or heat-pressing-HT), which resulted in six groups: FEL-RC, FEL-FC, FEL-HT, LD-RC, LD-FC, LD-HT. After preparation, the samples were immersed in distilled water for 24 h before the shear bond strength (SBS) test. The failure modes were classified as adhesive, predominantly adhesive, or cohesive. Representative failure mode images were taken in a Scanning Electron Microscope. The SBS data were analyzed by two-way ANOVA and Tukey's test. RESULTS Both type of veneering ceramic and technique affected the bond strength. FC led to the highest SBS values. RC and HP provided similar results when compared within each veneering ceramic. Lithium disilicate achieved lower bond strength than feldspathic ceramic when the heat-pressing technique was applied. The most frequent failure modes were predominantly adhesive and adhesive for FEL and LD, respectively. CONCLUSION File-splitting with fusion ceramic provided the highest adhesion to zirconia when feldspathic or lithium disilicate-based ceramics were used. The heat-pressing technique for veneering with lithium disilicate significantly decreased the bond strength when compared to the feldspathic ceramic.
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Affiliation(s)
- Vanessa de Fátima Nogueira
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, SP, Brazil
| | - Camila da Silva Rodrigues
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, SP, Brazil
- Graduate Program in Dentistry, Federal University of Pelotas (UFPel), Pelotas, RS, Brazil
| | - Manassés Tercio Vieira Grangeiro
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, SP, Brazil
- School of Dentistry, Anhanguera University, São José dos Campos, SP, Brazil
| | - Lisseth Patricia Claudio Contreras
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, SP, Brazil
| | - Renata Marques de Melo Marinho
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, SP, Brazil
| | - Marco Antônio Bottino
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, SP, Brazil
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Fathpour K, Astaraki E, Zandian A, Fathi A, Mirmohammadi H. Shear bond strength of composite resins to lithium disilicate ceramics using universal bonding and different methods of surface preparation. Dent Res J (Isfahan) 2023; 20:82. [PMID: 37674574 PMCID: PMC10478835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 03/14/2023] [Accepted: 05/10/2023] [Indexed: 09/08/2023] Open
Abstract
Background Porcelain fracture or chipping is one of the limitations of all ceramic restorations. This study investigated the shear bond strength (SBS) of composite resins to lithium disilicate ceramics using universal bondings and different methods of surface preparation. Materials and Methods In this experimental study, 72 specimens of e.max computer-aided design and computer-aided manufacturing (CAD/CAM) ceramic blocks were divided into six groups of 12 according to surface treatment: Group I-Hydrofluoric (HF) acid etching + All-Bond Universal bonding (ABU), Group II-Bur roughening (BR) + HF + ABU, Group III-BR + HF + Bis-Silane (Si) + ABU, Group IV-Sandblasting (SB) + ABU, Group V-SB + HF + ABU, Group VI-SB + HF + Si + ABU. After bonding of composite resin to the prepared ceramic surface and storage of samples in distilled water for 24 h, SBS test was done using the universal testing machine at a crosshead speed of 0.5 mm/min. Data were analyzed using the analysis of variance and Tukey's post hoc test (α = 0.05). Results The mean values of SBS in six studied groups were 6.65 ± 2.78 MPa, 8.56 ± 2.69 MPa, 8.49 ± 2.14 MPa, 3.13 ± 1.66 MPa, 7.94 ± 2.4 MPa, and 10.04 ± 2.47 MPa, respectively. The mean values of SBS were significantly different (P < 0.001). The highest value of SBS was observed in Group VI and the lowest in Group IV. Conclusion Ceramic sandblasting followed by HF etching, Bis Si, and ABU resulted in a higher SBS of composite resins to lithium disilicate ceramics.
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Affiliation(s)
- Kamyar Fathpour
- Department of Restorative Dentistry, Dental Materials Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Elham Astaraki
- Dental Student's Research Committee, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Amin Zandian
- Department of Restorative Dentistry, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Amirhossein Fathi
- Dental Prosthodontics Department, Dental Materials Research Center, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Hesam Mirmohammadi
- Department of Endodontology, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, the Netherlands
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Tajti P, Solyom E, Czumbel LM, Szabó B, Fazekas R, Németh O, Hermann P, Gerber G, Hegyi P, Mikulás K. Monolithic zirconia as a valid alternative to metal-ceramic for implant-supported single crowns in the posterior region: A systematic review and meta-analysis of randomized controlled trials. J Prosthet Dent 2023:S0022-3913(23)00336-0. [PMID: 37349158 DOI: 10.1016/j.prosdent.2023.05.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 05/18/2023] [Accepted: 05/19/2023] [Indexed: 06/24/2023]
Abstract
STATEMENT OF PROBLEM Technical complication rates of standard metal-ceramic implant-supported posterior restorations are relatively high. Whether monolithic zirconia crowns represent a more successful alternative is unclear. PURPOSE The purpose of this systematic review and meta-analysis was to compare the clinical outcomes of posterior monolithic zirconia and metal-ceramic implant-supported single crowns. MATERIAL AND METHODS A search was conducted in MEDLINE, Scopus, Embase, Web of Science, and CENTRAL databases for randomized controlled trials up to April 2023 with a follow-up time of at least 1 year. Restoration and implant survival and failure rates, marginal bone loss (MBL), bleeding on probing (BOP), and technical complications were analyzed by 2 reviewers. Statistical analyses were conducted using the R-statistics software program. The risk of bias was assessed by the Cochrane Risk of Bias Tool 2 (RoB 2), and the certainty of evidence by the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) approach. RESULTS A total of 11 out of 2030 records were identified by title and abstract, and 4 records were included after full-text analysis. The statistical analysis revealed no significant difference in MBL (MD -0.11, 95% CI: [-0.25; 0.03]), BOP (OR 0.66, 95% CI: [0.25; 1.77]), or implant failure (OR 1.30, 95% CI: [0.24; 7.08]). Monolithic zirconia presented significantly less chipping over 1 year (OR 0.17, 95% CI: [0.03; 0.99]). The chipping rate was 0% for monolithic zirconia and 7.61% for metal-ceramic. Based on a narrative review, the restoration survival rate was 97.5% in the monolithic zirconia group and 99.1% in the metal-ceramic group. CONCLUSIONS Monolithic zirconia showed favorable short-term survival rates and had significantly less chipping over 1 year. Regarding MBL, BOP, and failure rates, both restoration types presented similar results at the 1-year follow-up.
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Affiliation(s)
- Péter Tajti
- Resident, Department of Prosthodontics, Semmelweis University, Budapest, Hungary; PhD student, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Eleonora Solyom
- Clinical Specialist, Department of Periodontology, Semmelweis University, Budapest, Hungary; PhD student, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - László Márk Czumbel
- Resident, Department of Periodontology, Semmelweis University, Budapest, Hungary; Scientific Methodology Supervisor, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Bence Szabó
- Biostatistician, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Réka Fazekas
- Assistant Professor, Department of Conservative Dentistry, Semmelweis University, Budapest, Hungary; Supervisor, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Orsolya Németh
- Director, Associate Professor, Department of Community Dentistry, Semmelweis University, Budapest, Hungary; Supervisor, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Péter Hermann
- Director, Full Professor, Department of Prosthodontics, Semmelweis University, Budapest, Hungary; Supervisor, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Gábor Gerber
- Associate Professor, Department of Anatomy, Histology and Embryology, Semmelweis University, Budapest, Hungary; Supervisor, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Péter Hegyi
- Strategic Director, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary; Strategic Director, Institute for Translational Medicine, Medical School, University of Pécs, Pécs, Hungary
| | - Krisztina Mikulás
- Assistant Professor, Department of Prosthodontics, Semmelweis University, Budapest, Hungary; Supervisor, Centre for Translational Medicine, Semmelweis University, Budapest, Hungary.
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Cuzic C, Jivanescu A, Negru RM, Hulka I, Rominu M. The Influence of Hydrofluoric Acid Temperature and Application Technique on Ceramic Surface Texture and Shear Bond Strength of an Adhesive Cement. MATERIALS (BASEL, SWITZERLAND) 2023; 16:4303. [PMID: 37374484 DOI: 10.3390/ma16124303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 05/26/2023] [Accepted: 06/08/2023] [Indexed: 06/29/2023]
Abstract
All-ceramic restorations are the foundation of modern esthetic dentistry. Clinical approaches for preparation, durability, aesthetics, and repair have been reformed by the idea of adhesive dentistry. The aim of the study and the objective question was to evaluate the impact of heated hydrofluoric acid pretreatment and the application technique's influence on the surface morphology and roughness of leucite-reinforced glass-ceramic materials (IPS Empress CAD, Ivoclar Vivadent), which is fundamental for understanding the adhesive cementation process. Scanning electron microscopy was used to observe the effectiveness of the two HF (Yellow Porcelain Etch, Cerkamed) application techniques and the HF's temperature impact on the surface topography of the ceramic. Based on surface conditioning methods, the adhesive cement (Panavia V5, Kuraray Noritake Dental Inc., Tokyo, Japan) was applied to the conditioned ceramic samples and light-cured. Shear bond strength values were correlated with the micro-retentive surface texture of the ceramic. With universal testing equipment at a 0.5 mm/min crosshead speed, SBS values between the resin cement and the ceramic material were assessed until failure. Analyzing the fractured surfaces of the specimens by digital microscopy, the failure modes were divided into three categories: adhesive, cohesive, and mixed failure. Analysis of variance (ANOVA) was used to statistically analyze the collected data. The results show that alternative treatment methods affected the material's surface characteristics and have an influence on the shear bond strength.
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Affiliation(s)
- Cristiana Cuzic
- Department of Prosthodontics, Faculty of Dental Medicine, University of Medicine and Pharmacy "Victor Babes", 300041 Timisoara, Romania
- Research Center of Digital and Advanced Technique for Endodontic, Restorative, and Prosthetic Treatment (TADERP), 300041 Timisoara, Romania
| | - Anca Jivanescu
- Department of Prosthodontics, Faculty of Dental Medicine, University of Medicine and Pharmacy "Victor Babes", 300041 Timisoara, Romania
- Research Center of Digital and Advanced Technique for Endodontic, Restorative, and Prosthetic Treatment (TADERP), 300041 Timisoara, Romania
| | - Radu Marcel Negru
- Research Center in Dental Medicine Using Conventional and Alternative Technologies, School of Dental Medicine, University of Medicine and Pharmacy "Victor Babes", 300070 Timisoara, Romania
- Department of Mechanics and Strength of Materials, Politehnica University Timisoara, 300222 Timisoara, Romania
| | - Iosif Hulka
- Research Institute for Renewable Energie, Politehnica University of Timisoara, G. Muzicescu 138, 300501 Timisoara, Romania
| | - Mihai Rominu
- Research Center in Dental Medicine Using Conventional and Alternative Technologies, School of Dental Medicine, University of Medicine and Pharmacy "Victor Babes", 300070 Timisoara, Romania
- Department of Prosthesis Technology and Dental Materials, Faculty of Dentistry, University of Medicine and Pharmacy "Victor Babes", 300041 Timisoara, Romania
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Nakhaei M, Mohammadipour HS, Eslami SF, Soroush Z. Microshear bond strength of resin cement to a zirconia-reinforced lithium silicate glass ceramic using different surface treatments. Dent Res J (Isfahan) 2023; 20:59. [PMID: 37388300 PMCID: PMC10300266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 09/09/2022] [Accepted: 12/07/2022] [Indexed: 07/01/2023] Open
Abstract
Background The purpose of this study was to evaluate the effect of different surface treatments on the microshear bond strength (μSBS) of resin cement to zirconia-reinforced lithium silicate ceramic and to compare it with lithium disilicate ceramic. Materials and Methods In this in vitro study, 80 specimens containing two glass ceramics of IPS e.max press and VITA SUPRINITY were prepared and categorized into four groups according to the surface treatments (n = 10) as Group 1 (C): no treatment (control); Group 2 (HF): etching with 9% hydrofluoric acid (HF) for 90 s followed by silane application; Group 3 (SPH): sandblasting with Al2O3 particles (50 μm), etching with 35% phosphoric acid for 40 s followed by application of silane and adhesive (Clearfil liner bond F); and Group 4 (SB): sandblasting with Al2O3 followed by silanization. Then, a resin cement (Panavia F2) was applied to the prepared ceramic surfaces. All samples were subjected to thermal aging (5000 cycles, 5-55). The μSBS test was evaluated and failure modes were recorded. Data were analyzed using the Shapiro-Wilk, two-way analysis of variance and Tukey's Honest Significant Difference post hoc tests (P < 0.05). Results IPS e.max press samples revealed significantly higher μSBS values compared to VITA SUPRINITY (P < 0.001), in whole surface treatments. The HF group showed the highest μSBS value, followed by the SPH and SB groups, respectively (P < 0.001). Adhesive failure was recorded as a predominant failure mode. Conclusion The adhesion performance of IPS e.max press was significantly higher than VITA SUPRINITY. The common surface treatment protocol including HF application followed by silanization was the most effective surface treatment for both glass ceramics.
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Affiliation(s)
- Mohammadreza Nakhaei
- Department of Prosthodontics, Dental Materials Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Seyyed-Farzan Eslami
- Department of Cosmetic and Restorative Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Zahra Soroush
- Department of Prosthodontics, Dental Materials Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
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Cai H, Xu X, Lu X, Zhao M, Jia Q, Jiang HB, Kwon JS. Dental Materials Applied to 3D and 4D Printing Technologies: A Review. Polymers (Basel) 2023; 15:polym15102405. [PMID: 37242980 DOI: 10.3390/polym15102405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 05/09/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023] Open
Abstract
As computer-aided design and computer-aided manufacturing (CAD/CAM) technologies have matured, three-dimensional (3D) printing materials suitable for dentistry have attracted considerable research interest, owing to their high efficiency and low cost for clinical treatment. Three-dimensional printing technology, also known as additive manufacturing, has developed rapidly over the last forty years, with gradual application in various fields from industry to dental sciences. Four-dimensional (4D) printing, defined as the fabrication of complex spontaneous structures that change over time in response to external stimuli in expected ways, includes the increasingly popular bioprinting. Existing 3D printing materials have varied characteristics and scopes of application; therefore, categorization is required. This review aims to classify, summarize, and discuss dental materials for 3D printing and 4D printing from a clinical perspective. Based on these, this review describes four major materials, i.e., polymers, metals, ceramics, and biomaterials. The manufacturing process of 3D printing and 4D printing materials, their characteristics, applicable printing technologies, and clinical application scope are described in detail. Furthermore, the development of composite materials for 3D printing is the main focus of future research, as combining multiple materials can improve the materials' properties. Updates in material sciences play important roles in dentistry; hence, the emergence of newer materials are expected to promote further innovations in dentistry.
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Affiliation(s)
- HongXin Cai
- Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, Seoul 03722, Republic of Korea
| | - Xiaotong Xu
- The CONVERSATIONALIST Club, School of Stomatology, Shandong First Medical University, Jinan 250117, China
| | - Xinyue Lu
- The CONVERSATIONALIST Club, School of Stomatology, Shandong First Medical University, Jinan 250117, China
| | - Menghua Zhao
- The CONVERSATIONALIST Club, School of Stomatology, Shandong First Medical University, Jinan 250117, China
| | - Qi Jia
- The CONVERSATIONALIST Club, School of Stomatology, Shandong First Medical University, Jinan 250117, China
| | - Heng-Bo Jiang
- The CONVERSATIONALIST Club, School of Stomatology, Shandong First Medical University, Jinan 250117, China
| | - Jae-Sung Kwon
- Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, Seoul 03722, Republic of Korea
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May MM, Machry RV, Fraga S, de Andrade GS, Bottino MA, Valandro LF, May LG. Resin cement coating reverts the machining damage on the flexural fatigue strength of lithium disilicate glass-ceramic. J Biomed Mater Res B Appl Biomater 2023; 111:971-980. [PMID: 36434818 DOI: 10.1002/jbm.b.35206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 10/31/2022] [Accepted: 11/15/2022] [Indexed: 11/27/2022]
Abstract
This study evaluated the effect of resin cement coating with high and low viscosities on the flexural fatigue strength of machined lithium disilicate glass-ceramic. Discs (IPS e.max CAD; Ivoclar Vivadent) were prepared and divided according to the surface condition (machining [M]-CEREC inLab; and polishing [P]-laboratory procedures), resin cement coating (with or without), and cement viscosity (high [H] and low [L]). The ceramic bonding surface was etched/primed by a one-step primer application followed by resin cement application (Variolink N base + high or low viscosity catalyst; Ivoclar Vivadent). Biaxial flexural fatigue strength was evaluated on a piston-on-three-ball set by the step-test method (n = 15) (initial stress: 60 MPa; incremental steps: 20 MPa; 10,000 cycles/step, at 20 Hz). Weibull statistics were used for fatigue data. Contact angle, topographic, and fractographic analysis were also performed. Machining produced statistically lower contact angle than polishing and a significant detrimental effect on the fatigue behavior (σ0 M = 247.2 [246.9-268.3]; σ0 P = 337.4 [297.8-382.4]). Machined groups followed by resin cement coating (σ0 MH = 297.9 [276.0-321.5]; σ0 Ml = 301.2 [277.1-327.4]) behaved similarly to the polished and coated groups (σ0 PH = 342.0 [308.9-378.5]; σ0 PL = 357.3 [324.7-393.1]), irrespective of the cement viscosity. Therefore, cement coating has able to revert the detrimental effects of the machining on the fatigue strength of lithium disilicate glass-ceramic. High and low viscosity cements behaved similarly in the improvement of CAD-CAM lithium disilicate fatigue strength.
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Affiliation(s)
- Michele Mirian May
- Post-Graduate Program in Dental Sciences, Prosthetic Dentistry Unit, Faculty of Odontology, Federal University of Santa Maria, Santa Maria, Brazil
| | - Renan Vaz Machry
- Post-Graduate Program in Dental Sciences, Prosthetic Dentistry Unit, Faculty of Odontology, Federal University of Santa Maria, Santa Maria, Brazil
| | - Sara Fraga
- Department of Conservative Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Marco Antonio Bottino
- Department of Dental Materials and Prosthodontics, São Paulo State University, São José dos Campos, Brazil
| | - Luiz Felipe Valandro
- Department of Restorative Dentistry, Federal University of Santa Maria, Santa Maria, Brazil
| | - Liliana Gressler May
- Department of Restorative Dentistry, Federal University of Santa Maria, Santa Maria, Brazil
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Shear bond strength of porcelain to milled and stereolithography additively manufactured zirconia with and without surface treatment: An in vitro study. J Prosthet Dent 2023:S0022-3913(23)00113-0. [PMID: 36932021 DOI: 10.1016/j.prosdent.2023.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 02/14/2023] [Accepted: 02/15/2023] [Indexed: 03/17/2023]
Abstract
STATEMENT OF PROBLEM Delamination of veneering ceramic is one of the most common challenges relating to veneered zirconia restorations. Additive manufacturing (AM) is a fast-expanding technology that has gained widespread acceptance in dentistry and is increasingly being used to produce dental restorations. However, information about bonding of porcelain to AM zirconia is lacking. PURPOSE The purpose of this in vitro study was to investigate the shear bond strength (SBS) of porcelain to milled and additively manufactured zirconia, and the effect of surface treatment on bond strength. MATERIAL AND METHODS A Ø12×5-mm disk was designed virtually to fabricate all specimens, which were divided into 2 groups according to the manufacturing technique: additively manufactured or milled zirconia. The effect of airborne-particle abrasion and a zirconia liner before porcelain application was investigated in both groups. Veneering porcelain was fired into an alumina ring mold on the zirconia surface. SBS was measured by using a universal testing machine at a crosshead speed of 1 mm/min before and after aging (n=10). SBS data were analyzed with 3-way ANOVA (α=.05) RESULTS: A significant difference was found between milled and AM zirconia. The SBS of porcelain to milled zirconia was significantly higher (1.38 MPa) than to AM zirconia (0.68 MPa) (P<.001). The surface treatment of zirconia had no significant effect on porcelain SBS in either group (P=.254), whereas thermocycling significantly reduced the SBS of porcelain to zirconia in both milled and AM groups (P=.001). CONCLUSIONS Porcelain bonding to milled zirconia was better than to AM zirconia. Pretreating the zirconia substrate before porcelain application did not improve the porcelain bond.
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Abstract
The purpose of this article is to review current understanding of lithia-based glass-ceramics and to identify future research needs for this class of dental materials in relation to novel compositions and fabrication methods. With rapid advances in material development and digital technology, time efficiency of dental workflow and fit accuracy of ceramic restorations are ever improving. Lithia-based glass-ceramics are at the forefront of this advance-new variants with more efficient fabrication routes are continually being introduced into the marketplace. Base glass composition, crystallization heat treatment, nucleant and coloration additives, and property gradation are some pertinent variables. The trend in fabrication is to move from CAD/CAM grinding of partially crystallized glass-ceramics to fully crystallized materials, thereby circumventing the need for postmachining firing altogether. In these endeavors, a better understanding of mechanical properties and evolving shaping technologies, such as ductile grinding, is paramount. Additive manufacturing and 3-dimensional printing methodologies offer a promising alternative to current CAD/CAM subtractive manufacturing routes. Challenges to the implementation of new technologies in efficient development and production of high-quality dental glass-ceramic prostheses are addressed.
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Affiliation(s)
- Y. Zhang
- Department of Preventive and
Restorative Sciences, School of Dental Medicine, University of Pennsylvania,
Philadelphia, PA, USA
| | - S. Vardhaman
- Department of Preventive and
Restorative Sciences, School of Dental Medicine, University of Pennsylvania,
Philadelphia, PA, USA
| | - C.S. Rodrigues
- Department of Dental Materials and
Prosthodontics, Institute of Science and Technology, São Paulo State University, São
José dos Campos, Brazil
| | - B.R. Lawn
- Material Measurement Laboratory,
National Institute of Standards and Technology, Gaithersburg, MD, USA
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PEREIRA RM, RIBAS RG, MONTANHEIRO TLDA, SCHATKOSKI VM, RODRIGUES KF, KITO LT, KOBO LK, CAMPOS TMB, BONFANTE EA, GIERTHMUEHLEN PC, SPITZNAGEL FA, THIM GP. An engineering perspective of ceramics applied in dental reconstructions. J Appl Oral Sci 2023; 31:e20220421. [PMID: 36820784 PMCID: PMC9972857 DOI: 10.1590/1678-7757-2022-0421] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 01/04/2023] [Indexed: 02/22/2023] Open
Abstract
The demands for dental materials continue to grow, driven by the desire to reach a better performance than currently achieved by the available materials. In the dental restorative ceramic field, the structures evolved from the metal-ceramic systems to highly translucent multilayered zirconia, aiming not only for tailored mechanical properties but also for the aesthetics to mimic natural teeth. Ceramics are widely used in prosthetic dentistry due to their attractive clinical properties, including high strength, biocompatibility, chemical stability, and a good combination of optical properties. Metal-ceramics type has always been the golden standard of dental reconstruction. However, this system lacks aesthetic aspects. For this reason, efforts are made to develop materials that met both the mechanical features necessary for the safe performance of the restoration as well as the aesthetic aspects, aiming for a beautiful smile. In this field, glass and high-strength core ceramics have been highly investigated for applications in dental restoration due to their excellent combination of mechanical properties and translucency. However, since these are recent materials when compared with the metal-ceramic system, many studies are still required to guarantee the quality and longevity of these systems. Therefore, a background on available dental materials properties is a starting point to provoke a discussion on the development of potential alternatives to rehabilitate lost hard and soft tissue structures with ceramic-based tooth and implant-supported reconstructions. This review aims to bring the most recent materials research of the two major categories of ceramic restorations: ceramic-metal system and all-ceramic restorations. The practical aspects are herein presented regarding the evolution and development of materials, technologies applications, strength, color, and aesthetics. A trend was observed to use high-strength core ceramics type due to their ability to be manufactured by CAD/CAM technology. In addition, the impacts of COVID-19 on the market of dental restorative ceramics are presented.
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Affiliation(s)
- Raíssa Monteiro PEREIRA
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
| | - Renata Guimarães RIBAS
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
| | - Thaís Larissa do Amaral MONTANHEIRO
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
| | - Vanessa Modelski SCHATKOSKI
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
| | - Karla Faquine RODRIGUES
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
| | - Letícia Terumi KITO
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
| | - Lucas Kazunori KOBO
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
| | - Tiago Moreira Bastos CAMPOS
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
| | - Estevam Augusto BONFANTE
- Universidade de São PauloFaculdade de Odontologia de BauruDepartamento de Prótese e PeriodontiaBauruSPBrasilUniversidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Prótese e Periodontia, Bauru, SP, Brasil.
| | - Petra Christine GIERTHMUEHLEN
- Heinrich-Heine-UniversityMedical FacultyUniversity Hospital DüsseldorfDüsseldorfGermanyHeinrich-Heine-University, Medical Faculty and University Hospital Düsseldorf, Düsseldorf, Department of Prosthodontics, Germany.
| | - Frank Akito SPITZNAGEL
- Heinrich-Heine-UniversityMedical FacultyUniversity Hospital DüsseldorfDüsseldorfGermanyHeinrich-Heine-University, Medical Faculty and University Hospital Düsseldorf, Düsseldorf, Department of Prosthodontics, Germany.
| | - Gilmar Patrocínio THIM
- Instituto Tecnológico de AeronáuticaLaboratório de Plasma e ProcessosSão José dos CamposBrasilInstituto Tecnológico de Aeronáutica (ITA), Laboratório de Plasma e Processos (LPP), São José dos Campos, Brasil
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Noronha MDS, Carvalho MAD, Do AQ, Neto VGDA, Campos CH, Giannini M, Magne P. Effect of thickness and CAD-CAM material on fatigue resistance of endodontically treated molars restored with occlusal veneers. J Prosthodont 2023; 32:e19-e29. [PMID: 36087111 DOI: 10.1111/jopr.13606] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 09/06/2022] [Indexed: 11/30/2022] Open
Abstract
PURPOSE To evaluate the influence of the thickness and type of computer-aided design and computer-aided manufacturing (CAD-CAM) material on the fatigue resistance and failure mode of endodontically treated teeth (ETT) restored with occlusal veneers (OV). MATERIALS AND METHODS Seventy-five (N = 75) ETT were restored with Herculite XRV in the endodontic access. Five experimental groups (n = 15) were tested. Four groups had two different thicknesses (0.6-0.7 mm or 1.4-1.6 mm) and two different CAD-CAM materials: zirconia-reinforced lithium-silicate (LS/Celtra Duo) and composite resin (RC/Cerasmart). The fifth group (control) did not have occlusal veneers. All the specimens were subjected to accelerated fatigue (5 Hz frequency) with an occlusal load increasing up to 1800 N and 131,000 cycles. The number of cycles was recorded when the machine stopped or at the completion of the test. Fatigue resistance was analyzed using the Kaplan-Meier survival test (95% significance level, log-rank post hoc pairwise comparisons). The samples were categorized according to failure mode. The CAD-CAM materials were examined through scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). RESULTS No differences were found between the thicknesses, regardless of the type of the CAD-CAM material. The thick LS OV outperformed the RC and control groups. The thin RC OV and control groups showed a higher percentage of repairable and possibly repairable failures than the other groups. LS was more homogeneous under SEM, and the EDS analysis detected Si and Zr, but not Li. CONCLUSIONS A larger thickness did not improve the resistance of the CAD-CAM materials. Thick LS showed a higher cumulative survival rate to fatigue than the RC and control groups. The direct composite alone (control) survived similarly to the experimental groups, except for the thick LS.
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Affiliation(s)
- Mayara Dos Santos Noronha
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | | | - Anh Quynh Do
- Advanced Endodontics, Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, CA
| | | | - Camila Heitor Campos
- Department of Oral Rehabilitation, School of Dentistry, Federal Fluminense University, Nova Friburgo, Brazil
| | - Marcelo Giannini
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, São Paulo, Brazil
| | - Pascal Magne
- Division of Restorative Sciences, Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, CA
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Hassouneh L, Jum'ah A, Ferrari M, Wood DJ. A Micro-computed Tomography Analysis of Marginal and Internal Fit of Endocrowns Fabricated from Three CAD/CAM Materials. Oper Dent 2023; 48:79-89. [PMID: 36445975 DOI: 10.2341/21-105-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/07/2022] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To assess the marginal and internal misfit of endocrowns fabricated from a resin matrix ceramic (CS), a partially crystallized (EMC), and a fully crystallized (ILS) lithium disilicate glass-ceramic. METHODS AND MATERIALS Thirty human premolar teeth restored with endocrowns were investigated. Three CAD/CAM materials were used (n=10 per group): CS, EMC, and ILS. Two-dimensional (2D) analysis of marginal and internal misfit was performed on micro-computed tomography scans before and after adhesive bonding. Further, three-dimensional (3D) analysis was performed to determine the total internal volume discrepancy. Surface roughness of the fitting surfaces of endocrowns was characterized using optical profilometry and scanning electron microscopy. RESULTS Adhesive bonding did not significantly affect marginal or internal misfit (p≥0.093). Differences in marginal misfit among the experimental groups were not statistically significant (p≥0.221). However, differences in 2D internal misfit were statistically significant; the CS group exhibited the largest internal misfit (p=0.001), while no significant difference was found between other groups (p=0.123). The largest discrepancies were observed at the pulpal floor and cervical region of all investigated specimens. No statistically significant difference was found in 3D misfit between ILS and EMC groups (p=0.711); however both exhibited statistically lower 3D misfit values compared to the CS group (p≤0.037). ILS endocrowns exhibited the smoothest and most homogenous fitting surface profile (p<0.001). However, there was no significant correlation between 2D internal misfit and the surface roughness (p≥0.082). CONCLUSIONS The choice of CAD/CAM material may influence the fitting accuracy of endocrowns. The investigated lithium disilicate glass-ceramics conferred superior internal fit for endocrowns compared to resin matrix ceramic.
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Affiliation(s)
- L Hassouneh
- Layla Hassouneh, PhD, MClinDent, BDS, University of Leeds, School of Dentistry, Division of Restorative Dentistry, Leeds, UK; and Department of Conservative Dentistry, Faculty of Dentistry, Jordan University of Science and Technology, Irbid, Jordan
| | - A Jum'ah
- *Ahmad Jum'ah, PhD, MRD(Pros.)RSCEd, RSCEd, JB, MSc, BDS, Department of Conservative Dentistry, Faculty of Dentistry, Jordan University of Science and Technology, Irbid, Jordan; and Faculty of Dentistry, Aqaba Medical Sciences University, Aqaba, Jordan
| | - M Ferrari
- Marco Ferrari, MD DDS, PhD, 1. University of Siena, Department of Medical Biotechnologies, Division of Fixed Prosthodontics, Siena, Italy 2. University of Leeds, School of Dentistry, Division of Restorative Dentistry, Leeds, UK
| | - D J Wood
- David J Wood, BSc, PhD, University of Leeds, School of Dentistry, Division of Oral Biology, Leeds, UK
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Fathy H, Hamama HH, El-Wassefy N, Mahmoud SH. Effect of different surface treatments on resin-matrix CAD/CAM ceramics bonding to dentin: in vitro study. BMC Oral Health 2022; 22:635. [PMID: 36564766 PMCID: PMC9789622 DOI: 10.1186/s12903-022-02674-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Evaluating the effect of different surface treatment methods on the micro-tensile bond strength (µTBS) of two different resin-matrix computer-aided design/computer-aided manufacturing (CAD/CAM) ceramics (RMCs). METHODS A standardized inlay preparations were performed on 100 intact maxillary premolars. According to the type of the restorative material, the teeth were randomly divided into two equally sized groups (n = 50): (polymer-infiltrated ceramic (Vita Enamic) and resin-based composites (Lava Ultimate)). The inlays were fabricated using CAD/CAM technology. In each group, the specimens were randomly assigned to five subgroups (n = 10) according to the surface treatment method: group 1 used was the control group (no surface treatment); group 2, was treated with air abrasion with 50 μm Al2O3 (A) and universal adhesive (UA); group 3, was treated with air abrasion with 50 μm Al2O3 (A) and silane coupling agent (S); group 4, was treated with hydrofluoric acid (HF) and universal adhesive (UA) and group 5, was treated with Hydrofluoric acid (HF) + silane coupling agent (S). The inlays were then cemented to their respective preparations using dual-cure self-adhesive resin cement (RelyX U200, 3 M ESPE) according to the manufacturer's instructions. The µTBS test was conducted in all groups, and stereomicroscope and scanning electron microscope were used to inspect the failure mode. The data were statistically analyzed using a two-way analysis of variance (ANOVA) and Tukey's post-hoc multiple comparison tests at a significance level of p < 0.05. RESULTS Surface treatments significantly increased the µTBS of the materials compared to the control group (p < 0.05). For CAD/CAM RBCs, the µTBS value highest in group 2 whereas, for PICN, the µTBS value was highest in group 3. Cohesive failure of CAD/CAM restorative material was the most predominant mode of failure in all treated groups, whereas adhesive failure at restoration-cement interface was the most predominant failure mode in the control group. CONCLUSION Surface treatments increase the µTBS of resin-matrix CAD/CAM ceramics to tooth structure. Air abrasion followed by universal adhesive and hydrofluoric acid followed by silane application appears to be the best strategies for optimizing the bond strength of CAD/CAM RBCs and PICN respectively.
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Affiliation(s)
- Hanan Fathy
- Conservative Dentistry Department, Faculty of Dentistry, Mansoura University, Mansoura, 35516, Egypt
| | - Hamdi H Hamama
- Conservative Dentistry Department, Faculty of Dentistry, Mansoura University, Mansoura, 35516, Egypt.
| | - Noha El-Wassefy
- Dental Biomaterials Science Department, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Salah H Mahmoud
- Conservative Dentistry Department, Faculty of Dentistry, Mansoura University, Mansoura, 35516, Egypt
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Sodergren B, Wang J, Zhang Y, Kim J. Fracture resistance of Ceramic-Polymer hybrid materials using microscopic finite element analysis and experimental validation. Comput Methods Biomech Biomed Engin 2022; 25:1785-1795. [PMID: 35147471 PMCID: PMC9899050 DOI: 10.1080/10255842.2022.2038141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 01/26/2022] [Accepted: 02/01/2022] [Indexed: 02/06/2023]
Abstract
The objective of this paper is to elucidate the response to contact stresses of Polymer Infiltrated Ceramic Network (PICN) using the microscopic viscoplastic finite elements, validated by clinically relevant in vitro tests. A feldspathic ceramic material, namely Vita Mark II, is an interconnected structure infiltrated with the polymer (PMMA). Axisymmetric finite element microstructure models are reconstructed from two-dimensional images of a PICN microstructure. Viscoplastic finite element analysis (FEA) with various degrees of microscopic damages occurring over contact is performed. The force-displacement responses obtained from FEA are validated with Hertzian contact tests. Finite element results for force-displacement, stresses and strains in each phase are discussed. We hypothesize that the resistance to fracture of PICN can be further improved by microstructural tailoring. The experimental evidence suggests that a composite material is both more resistant to displacement under load and more resistant to crack initiation and propagation, as hypothesized. Further parametric study on the effects of various volume fractions of two phases in PICN is done to provide some insight on increased contact damage resistance of PICN as well as potential optimization of microstructures.
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Affiliation(s)
- Brendan Sodergren
- Department of Civil and Environmental Engineering, University of Connecticut, Storrs, CT, USA
| | - Jing Wang
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY
| | - Yu Zhang
- Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA
| | - Jeongho Kim
- Department of Civil and Environmental Engineering, University of Connecticut, Storrs, CT, USA
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da Silva SEG, de Araújo GM, Souza KB, Moura DMD, Aurélio IL, May LG, Vila-Nova TEL, Zhang Y, de Assunção E Souza RO. Biaxial flexure strength and physicochemical characterization of a CAD/CAM lithium disilicate ceramic: effect of etching time, silane, and adhesive applications. Clin Oral Investig 2022; 26:6753-6763. [PMID: 35980474 PMCID: PMC9902029 DOI: 10.1007/s00784-022-04635-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 07/12/2022] [Indexed: 01/21/2023]
Abstract
OBJECTIVE To evaluate the effect of different acid etching time and bonding agent (silane and/or adhesive system) on biaxial flexural strength and physico-chemical properties of a lithium disilicate ceramic. MATERIAL AND METHODS One hundred twenty ceramic discs were made and divided into 8 groups (n = 15) according to factors "etching time" (20 and 120 s) with hydrofluoric acid (HF) and "bonding agent" (C, no bonding agent; S, silane, A, adhesive; and SA, silane + adhesive). After surface treatment, a resin cement layer was applied to the surface and all specimens were subjected to biaxial flexural strength (BFS) test with treated surfaces loaded in tension (1 mm/min). The Weibull analyses and complementary analyses were also performed. Statistical analysis was done with 2-way ANOVA and the Tukey test (α = 0.05). RESULTS ANOVA revealed that the factors "etching time" (p = 0.0003) and "bonding agent" (p = 0.007) were statistically significant. In the overall analysis, the HF120S group (272.02 ± 35.30A MPa) presented significantly higher BFS than that of HF120C (218.45 ± 17.15CD MPa) and HF20S (228.40 ± 37.83BCDMPa). On the other hand, the HF20A group (208.92 ± 31.16D MPa) had significantly lower BFS than HF120S (272.02 ± 35.30A), HF120A (254.42 ± 26.87ABC) and HF120SA (259.30 ± 36.55AB) groups (Tukey). The Weibull modulus (m) of all groups was significantly different from each other (p = 0.000). CONCLUSIONS Regardless of etching time, the application of silane alone is sufficient to increase the flexural strength of glass ceramic, eliminating the need for the application of adhesive systems. Moreover, if only silane or adhesive is applied, 120-s HF application should increase the flexural resistance of the lithium disilicate ceramic. CLINICAL SIGNIFICANCE Applications of adhesive systems after silanization can be suppressed from the surface treatment protocol of glass ceramics, since it does not improve their mechanical strength.
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Affiliation(s)
- Sarah Emille Gomes da Silva
- Department of Dentistry, Federal University of Rio Grande Do Norte (UFRN), Av. Salgado FilhoLagoa Nova, Natal, RN, CEP, 178759056-000, Brazil
| | - Gabriela Monteiro de Araújo
- Department of Dentistry, Oral Science, Federal University of Rio Grande Do Norte (UFRN), Av. Salgado FilhoLagoa Nova, Natal, RN. CEP, 178759056-000, Brazil
| | - Karina Barbosa Souza
- Institute of Science and Technology, Univ Estadual Paulista - UNESP, Francisco Jose Longo, Av. Eng, Sao Jose dos Campos, SP, 777, Brazil
| | - Dayanne Monielle Duarte Moura
- Department of Dentistry, State University of Rio Grande Do Norte (UERN), Rua Almino Afonso, 478 - Centro - Mossoró/RN CEP: 59.610-210, Rio, Brazil
| | - Iana Lamadrid Aurélio
- Department of Restorative Dentistry, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brazil
| | - Liliana Gressler May
- Department of Restorative Dentistry, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brazil
| | | | - Yu Zhang
- School of Dental Medicine, Department of Preventive and Restorative, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Rodrigo Othávio de Assunção E Souza
- Department of Dentistry, Federal University of Rio Grande Do Norte (UFRN), Av. Salgado FilhoLagoa Nova, Natal, RN, CEP, 178759056-000, Brazil.
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Alves L, Rodrigues C, Vardhaman S, Saunders C, Schneider J, Lawn B, Zhang Y. Exploring Ductility in Dental Ceramics. J Dent Res 2022; 101:1467-1473. [PMID: 35689403 PMCID: PMC9608091 DOI: 10.1177/00220345221100409] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Two damage regimes-"brittle" and "ductile"-have been identified in the literature on ceramic grinding, machining, grit blasting, and wear. In the brittle regime, the damage mechanism is essentially crack formation, while in the ductile region, it is quasiplasticity. Onset of the brittle mode poses the greater threat to strength, so it becomes important to understand the mechanics of ductile-brittle thresholds in these materials. Controlled microcontact tests with a sharp indenter are employed to establish such thresholds for a suite of contemporary computer-aided design/computer-aided manufacturing dental ceramics. Plots of flexural strength S versus indentation load P show a steep decline beyond the threshold, consistent with well-established contact mechanics relations. Threshold dimensions occur on a scale of order 1 µm and contact load of order 1 N, values pertinent to practical grit finishing protocols. The ductile side of ceramic shaping is accessed by reducing grit sizes, applied loads, and depths of cut below critical levels. It is advocated that critical conditions for ductile shaping may be most readily quantified on analogous S(P) plots, but with appropriate machining variable (grit size, depths of cut, infeed rate) replacing load P. Working in the ductile region offers the promise of compelling time and cost economies in prosthesis fabrication and preparation.
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Affiliation(s)
- L.M.M. Alves
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY, USA
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University, São José dos Campos, SP, Brazil
| | - C.S. Rodrigues
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY, USA
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University, São José dos Campos, SP, Brazil
| | - S. Vardhaman
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY, USA
- Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - C. Saunders
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY, USA
| | - J.M. Schneider
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY, USA
| | - B.R. Lawn
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, USA
| | - Y. Zhang
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY, USA
- Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
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Ruggiero MM, Gomes RS, Bergamo ETP, Freitas MIM, Bonfante EA, Del Bel Cury AA. Marginal and Internal Misfit of Occlusal Veneers Made in Resin-matrix Ceramics. Oper Dent 2022; 47:701-708. [DOI: 10.2341/21-115-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/25/2022] [Indexed: 11/30/2022]
Abstract
SUMMARY
Objective
Considering that misfit is a significant predictor of the clinical success of indirect restorations, the objective of this study was to evaluate the marginal and internal misfit of two computer-aided design and manufacturing (CAD/CAM) RMC ceramic materials used as occlusal veneers (OVs) of different thicknesses.
Methods and Materials
A CAD model of a mandibular first molar was obtained and OV preparations 0.5-, 1.0-, and 1.5-mm thick were modeled and milled in two different materials (n=10/group): resin nanoceramic (RNC) and polymer-infiltrated ceramic network (PICN). Using the same CAD model, tooth preparations were milled in fiber-reinforced epoxy resin (n=20/thickness). The marginal and internal misfit of the restorations was assessed by X-ray microtomography. The measurements of the marginal gap (MG) and absolute marginal discrepancy were performed in two locations on each slice, whereas internal gap (IG) measurements were performed at ten locations on each slice. The data obtained were analyzed using two-way analysis of variance and Tukey post-hoc tests (α=0.05).
Results
No significant effect was attributable to the material type or material–thickness interaction for the MG, absolute marginal discrepancy (AMD), or IG (p>0.05). However, the thickness significantly affected the IG of the restorations (p<0.05). CAD/CAM RNC and PICN systems presented similar MG and AMD for OVs 0.5-, 1.0-, and 1.5-mm thick. However, the IG varied between thicknesses.
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Affiliation(s)
- MM Ruggiero
- Mirelle Maria Ruggiero, DDS, MSc, Department of Prosthodontics and Periodontology, University of Campinas -Piracicaba Dental School, Piracicaba, SP, Brazil
| | - RS Gomes
- Rafael Soares Gomes, DDS, MSc, PhD, Department of Prosthodontics and Periodontology, University of Campinas -Piracicaba Dental School, Piracicaba, SP, Brazil
| | - ETP Bergamo
- Edmara Tatiely Pedroso Bergamo, DDS, MSc, PhD, Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Bauru, SP, Brazil
| | - MIM Freitas
- Mariana Itaborai Moreira Freitas, DDS, MSc, Department of Prosthodontics and Periodontology, University of Campinas -Piracicaba Dental School, Piracicaba, SP, Brazil
| | - EA Bonfante
- Estevam Augusto Bonfante, DDS, MSc, PhD, Department of Prosthodontics and Periodontology, University of São Paulo -Bauru School of Dentistry, Bauru, SP, Brazil
| | - AA Del Bel Cury
- *Altair Antoninha Del Bel Cury, DDS, MSc, PhD, Department of Prosthodontics and Periodontology, University of Campinas - Piracicaba Dental School, Piracicaba, SP, Brazil
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AbuHaimed TS, Alzahrani SJ, Farsi SA, AL-Turki LE, Hajjaj MS. The Effect of Repeated Pressing on the Flexural Strength, Color Stability, Vickers Hardness, and Surface Topography of Heat-Pressed Lithium Disilicate. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6787. [PMID: 36234124 PMCID: PMC9573126 DOI: 10.3390/ma15196787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 09/25/2022] [Accepted: 09/25/2022] [Indexed: 06/16/2023]
Abstract
The aim of this study was to investigate the effect of repressing leftover heat-pressed lithium disilicate material on its mechanical and optical properties. A lithium disilicate ingot (IPS e.max® Press, IvoclarVivadent, Schaan, Liechtenstein) shade (A1) low translucency was first heat-pressed to yield ceramic bars and disks. Then, the second and third presses were fabricated from the leftovers of the previous pressing cycles. A total of 36 bars and 15 disk specimens were fabricated and divided into three groups according to the number of pressing cycles (n = 12 bars and n = 5 disks): P1: first press (control), P2: second press, and P3: third press. The specimens were tested for flexural strength, color change, Vickers hardness, and surface topography under scanning electron microscopy. One-way ANOVA testing was used to evaluate flexural strength and hardness, while an independent t-test was performed to evaluate color change. There was no significant difference in flexural strength as the number of heat-pressed cycles increased (p = 0.283). Similarly, there was no significant difference in the microhardness values between all groups (p = 0.220). The overall color change ∆E between P1-P2 and P1-P3 were 2.01 and 2.14, respectively. The SEM images showed evenly distributed and densely packed lithium disilicate crystals in the P1 group. However, larger and less densely packed crystals were noticeable in P2 and P3. The IPS e.max Press could be repressed up to two times without an adverse effect on mechanical properties or color stability. These results may support the reuse of pressed lithium disilicate for economical purposes, but further clinical evaluation should be conducted to confirm these findings.
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Affiliation(s)
- Tariq S. AbuHaimed
- Department of Restorative Dentistry, Faculty of Dentistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Saeed J. Alzahrani
- Department of Restorative Dentistry, Faculty of Dentistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Sami A. Farsi
- King Fahad Hospital, Ministry of Health, Jeddah 23325, Saudi Arabia
| | - Lulwa E. AL-Turki
- Department of Oral and Maxillofacial Prosthodontics Dentistry, Faculty of Dentistry, King Abdulaziz University, Jeddah 22254, Saudi Arabia
| | - Maher S. Hajjaj
- Department of Restorative Dentistry, Faculty of Dentistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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Jia-Mahasap W, Jitwirachot K, Holloway JA, Rangsri W, Rungsiyakull P. Wear of various restorative materials against 5Y-ZP zirconia. J Prosthet Dent 2022; 128:814.e1-814.e10. [PMID: 36089544 DOI: 10.1016/j.prosdent.2022.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 07/26/2022] [Accepted: 07/27/2022] [Indexed: 11/26/2022]
Abstract
STATEMENT OF PROBLEM The ceramic 5-mol% yttria-stabilized zirconia (5Y-ZP) has been developed for dental use in the esthetic zone with greater translucency than 3-mol% yttria-stabilized zirconia (3Y-ZP). However, studies on the wear behavior of 5Y-ZP zirconia against clinically relevant antagonist materials are lacking. PURPOSE The purpose of this in vitro study was to investigate the wear behavior of 5Y-ZP zirconia against the antagonists 5Y-ZP zirconia, lithium disilicate, palladium alloy, and human enamel. MATERIALS AND METHODS Flat specimens (n=8) were fabricated from 5Y-ZP zirconia, lithium disilicate, palladium alloy, and human central incisor enamel. A custom wear-simulating device with a sliding pin-on-plate configuration was used for a total of 120 000 wear cycles at 1.6-Hz frequency under a 49-N vertical load while submerged in distilled water at room temperature. The wear volume and maximum wear depth of flat specimens were evaluated with a 3D profilometer. Scanning electron microscopy was used to analyze the characteristics of the worn surfaces. RESULTS After wear simulation, the 5Y-ZP zirconia and palladium-silver alloy specimens exhibited the least amount of material loss, both in terms of maximum wear depth and wear volume (0.079 ±0.042 μm, 0.001 ±0.001 mm3 and 0.637 ±0.307 μm, 0.001 ±0.000 mm3, respectively). This was followed by human enamel (6.034 ±1.086 μm, 0.009 ±0.001 mm3) and by lithium disilicate, which showed excessive material loss (38.342 ±2.569 μm, 0.213 ±0.024 mm3). Scanning electron microscopy revealed variations in wear mechanisms among the materials. CONCLUSIONS The 5Y-ZP zirconia and palladium-silver alloy exhibited the lowest wear, followed by human enamel and lithium disilicate. Slight grain dislodgement was displayed on worn 5Y-ZP surfaces, while more apparent grain dislodgement and wear grooves were found on lithium disilicate. Plastic deformation of worn palladium-silver alloy accumulated at the end of wear track. Cracks were detected in the human enamel specimens.
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Affiliation(s)
- Wissanee Jia-Mahasap
- Lecturer, Department of Prosthodontics, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Kuljirarnat Jitwirachot
- Graduate student, Department of Prosthodontics, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Julie A Holloway
- Professor Emeritus, Department of Prosthodontics, The University of Iowa, Iowa City, Iowa
| | - Wetchayan Rangsri
- Assistant Professor, Department of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai, Thailand
| | - Pimduen Rungsiyakull
- Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand.
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Bashary N, Tashkandi A, Fan Y, Kaizer MR, Özcan M, Al-Haj Husain N, Zhang Y. Evaluating the Bond Strength of a Polymer Infiltrated Ceramic Network to Zirconia Using the Crossbeam Push-Off Method. THE EUROPEAN JOURNAL OF PROSTHODONTICS AND RESTORATIVE DENTISTRY 2022; 30:207-213. [PMID: 35023665 PMCID: PMC9897972 DOI: 10.1922/ejprd_2348bashary07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Porcelains and glass-ceramics have been used to produce CAD-milled veneers and crowns for zirconia copings and implant-abutments. This study evaluated the bondstrength of a polymer-infiltrated-ceramic-network to zirconia using two adhesive cement systems: Panavia 21 and Multilink Automix. Lithium disilicate and feldspathic porcelain were also tested as reference CAD-On materials. Long beams (3x6x40 mm³) of zirconia and short beams (3x6x15 mm³) of the CAD-On materials were prepared. Zirconia and each CAD-On material were bonded in a crossbeam arrangement and subjected to a modified tensile bond-strength test. Half of the samples in each group (n=10) were tested 5 days after bonding (baseline) and the remaining (n=10) underwent aging (50,000 thermocycles at 5°C and 55°C) prior to bond-strength testing. The effects of material, cement, and aging on the tensile bond-strength were tested using a three-way ANOVA. The reference lithium disilicate/Multilink system showed no significant differences in bond strength compared to polymer-infiltrated-ceramic-network and porcelain. The long-term retention of polymer-infiltrated-ceramic-network was not statistically different compared to the baseline values and the two reference materials. With comparable bond strength between all materials, polymer-infiltrated-ceramic-network is the favorable choice for CAD-On to zirconia copings and implant-abutments due to its superior resistance to fatigue fracture relative to porcelain.
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Affiliation(s)
- Nadav Bashary
- DDS student, Department of Biomaterials & Biomimetics, New York University College of Dentistry, 345 E. 24 Street, New York, NY 10010, USA
| | - Abeer Tashkandi
- Department of Restorative Sciences & Biomaterials, Boston University Henry M. Goldman School of Dental Medicine
| | - Yuwei Fan
- Research Associate Professor, Department of Restorative Sciences & Biomaterials, Boston University Henry M. Goldman School of Dental Medicine
| | - Marina R. Kaizer
- Professor, Graduate Program in Dentistry, Positivo University, Curitiba, PR 81280-330, Brazil
| | - Mutlu Özcan
- Professor and Head, Division of Dental Biomaterials, Clinic for Reconstructive Dentistry, Center of Dental Medicine, University of Zurich, Plattenstrasse 11, 8032 Zurich, Switzerland
| | - Nadin Al-Haj Husain
- Professor and Head, Division of Dental Biomaterials, Clinic for Reconstructive Dentistry, Center of Dental Medicine, University of Zurich, Plattenstrasse 11, 8032 Zurich, Switzerland
- Specialization Candidate, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010 Bern, Switzerland
| | - Yu Zhang
- Professor and Director for Restorative Research, Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania, 240 S. 40 Street, Philadelphia, PA 19104, USA
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Overview of Several Typical Ceramic Materials for Restorative Dentistry. BIOMED RESEARCH INTERNATIONAL 2022; 2022:8451445. [PMID: 35898679 PMCID: PMC9314004 DOI: 10.1155/2022/8451445] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Accepted: 06/28/2022] [Indexed: 11/20/2022]
Abstract
With the development of ceramic technology, prosthodontic ceramics are becoming a useful option for improving esthetic outcomes in dentistry. In this paper, various ceramic materials were reviewed and evaluated, and their advantages and disadvantages and indications in oral prosthodontics were analyzed objectively. The properties of resin-based ceramics, polycrystalline ceramics, and silicate ceramics were compared and analyzed. Resin-based ceramics may replace other ceramic materials in the CAD/CAM field.
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Effect of Helium Plasma Exposure on Wettability and Shear Bond Strength between the Zirconia Core and Feldspathic Veneering Ceramic: An In Vitro Study. Int J Dent 2022; 2022:6831864. [PMID: 35783687 PMCID: PMC9249525 DOI: 10.1155/2022/6831864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 05/20/2022] [Accepted: 06/01/2022] [Indexed: 11/18/2022] Open
Abstract
Introduction. The present study aimed to evaluate the effect of helium plasma treatment on the wettability of zirconia surface and on the shear bond strength between the dental zirconia core and feldspathic veneering ceramic. Methods. 128 zirconia specimens were prepared, polished, and then divided into four groups: control, Zr, FC, and Zr/FC. In Zr and Zr/FC groups, the zirconia blocks were treated by helium plasma for 60 s. In FC and Zr/FC, the feldspathic ceramic powder received 60 s of plasma treatment. Then, the feldspathic powder was applied on the zirconia blocks. Half of the specimens in each group were sintered in a tube furnace, and the contact angle between the zirconia core and feldspathic ceramic was measured at different time intervals. The other half were sintered in a ceramic furnace and then subjected to thermocycling. The shear bond strength was measured using a universal testing machine. The failure mode was assessed using a stereomicroscope. Data were analyzed by one-way ANOVA test, and the statistical significance was considered less than 0.05. Results. There was no significant difference in the mean contact angle and the shear bond strength values of the experimental groups (
). The mean contact angle decreased significantly in all groups over time (
). The modes of failure were predominantly mixed in all groups. Conclusion. The helium plasma applied on either dental zirconia core or feldspathic ceramic powder could not improve the zirconia surface wettability and the shear bond strength between the two ceramics.
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Performance of PROPELLER FSE T 2WI in reducing metal artifacts of material porcelain fused to metal crown: a clinical preliminary study. Sci Rep 2022; 12:8442. [PMID: 35589945 PMCID: PMC9120134 DOI: 10.1038/s41598-022-12402-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Accepted: 05/10/2022] [Indexed: 11/27/2022] Open
Abstract
This study aimed to compare MRI quality between conventional fast spin echo T2 weighted imaging (FSE T2WI) with periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) FSE T2WI for patients with various porcelain fused to metal (PFM) crown and analyze the value of PROPELLER technique in reducing metal artifacts. Conventional FSE T2WI and PROPELLER FSE T2WI sequences for axial imaging of head were applied in participants with different PFM crowns: cobalt-chromium (Co–Cr) alloy, pure titanium (Ti), gold–palladium (Au–Pd) alloy. Two radiologists evaluated overall image quality of section in PFM using a 5-point scale qualitatively and measured the maximum artifact area and artifact signal-to-noise ratio (SNR) quantitatively. Fifty-nine participants were evaluated. The metal crown with the least artifacts and the optimum image quality shown in conventional FSE T2WI and PROPELLER FSE T2WI were in Au–Pd alloy, Ti, and Co–Cr alloy order. PROPELLER FSE T2WI was superior to conventional FSE T2WI in improving image quality and reducing artifact area for Co-Cr alloy (17.0 ± 0.2% smaller artifact area, p < 0.001) and Ti (11.6 ± 0.7% smaller artifact area, p = 0.005), but had similar performance compared to FSE T2WI for Au–Pd alloy. The SNRs of the tongue and masseter muscle were significantly higher on PROPELLER FSE T2WI compared with conventional FSE T2WI (tongue: 29.76 ± 8.45 vs. 21.54 ± 9.31, p = 0.007; masseter muscle: 19.11 ± 8.24 vs. 15.26 ± 6.08, p = 0.016). Therefore, the different PFM crown generate varying degrees of metal artifacts in MRI, and the PROPELLER can effectively reduce metal artifacts especially in the PFM crown of Co-Cr alloy.
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Prado PHCO, Dapieve KS, Campos TMB, Valandro LF, Melo RMD. Effect of hydrothermal and mechanical aging on the fatigue performance of high-translucency zirconias. Dent Mater 2022; 38:1060-1071. [DOI: 10.1016/j.dental.2022.04.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 02/10/2022] [Accepted: 04/01/2022] [Indexed: 11/03/2022]
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Comparative Assessment of the Functional Parameters for Metal-Ceramic and All-Ceramic Teeth Restorations in Prosthetic Dentistry-A Literature Review. BIOLOGY 2022; 11:biology11040556. [PMID: 35453755 PMCID: PMC9024664 DOI: 10.3390/biology11040556] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 03/27/2022] [Accepted: 03/31/2022] [Indexed: 12/16/2022]
Abstract
Simple Summary In the last decades, the science and technology of all-ceramic teeth restorations witnessed the fastest-growing field of restorative materials in research and development for fixed prosthodontics. Due to their properties, characterized by a high level of biocompatibility, excellent optical properties, and high fracture resistance, all-ceramic material can also be used in the posterior areas of the dental arches. However, metal-ceramic fixed partial dentures are still perceived as the golden standard for those restorations, thanks to the positive clinical outcomes. Irrespective of the materials of which fixed partial dentures are performed, their success rates depend on the expected outcome and on how they perform in the oral environment. Such conditions of failure restorations may include biological factors (i.e., secondary decay, loss of vitality, periodontal disease, or abutment fracture) or technical factors (i.e., chipping, ceramic fracture, framework fracture, or loss of retention). Our aim is to provide the current evidence for the efficacy of metal-ceramics and all-ceramics in the treatment of multiple posterior edentulous spaces. Moreover, we aim to compare the survival rates of metal-ceramic and all-ceramic fixed partial dentures in terms of functionality and biocompatibility in all the aforementioned clinical situations. Our results have shown that all all-ceramic systems, especially densely sintered zirconia and reinforced glass ceramics, have a promising future to satisfy both practitioners and patients. However, technical and biological complications need to be taken into account when planning multi-unit fixed partial dentures for the posterior areas. Abstract The metal-ceramic fixed partial prosthesis is the golden standard for posterior tooth restorations. Following the demands of patients and clinicians for metal-free restorations, all-ceramic materials were developed as they offer an adequate alternative with better optical qualities and good mechanical properties. This study aims to carry out a bibliographic review to assess the survival rate and the biological and technical complications of all-ceramic and metal-ceramic fixed partial dentures. An electronic search for articles in the English language literature was performed using PubMed (MEDLINE). This literature review focused on research studies between 2010 and 2020 that performed clinical studies on tooth-supported fixed partial dentures with a mean follow-up of at least 3 years. All the studies, which analyzed the survival and complications of tooth-supported fixed partial dentures, were included. Thus, 14 studies reporting on 756 all-ceramic and 160 metal-ceramic fixed partial dentures met the inclusion criteria. A comparative analysis was carried out based on all the data existing in the studies included in this review. The metal-ceramic fixed partial dentures showed survival rates of 95% to 100% at 3-, 5-, and 10-year follow-up periods. Zirconia fixed partial dentures were reported to have survival rates of 81% to 100% at 3-, 5-, 9-, 10-year follow-up evaluations. The reinforced glass-ceramic fixed partial dentures showed survival rates of 70% to 93.35% at 5 years, while the alumina FPDs showed a survival rate of 68% at 3 years follow-up. The incidence of caries and loss of vitality were reported as higher for all-ceramic prostheses as compared to the metal-ceramic ones. A significant framework fracture was reported for glass-infiltrated alumina fixed partial dentures in comparison to metal-ceramic fixed partial dentures. All-ceramic and metal-ceramic restorations showed similar survival rates after 3 years, although all-ceramic restorations have problems with technical complications such as chipping, which can lead to framework fractures over time.
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Yu H, Yue L, Liu W, Liu F, Niu L, Shao L, Liao H, Luo X, Li H, Jiang Q, Yu H, Zhao B, Wu Z, Li C, Wu G, Wang Y, Mou Y, Liu Y, Zhang H, Chen J, Liu H. Consensus on the preparation margin and restoration margin in ceramic esthetic rehabilitation. HUA XI KOU QIANG YI XUE ZA ZHI = HUAXI KOUQIANG YIXUE ZAZHI = WEST CHINA JOURNAL OF STOMATOLOGY 2022; 40:123-133. [PMID: 38597043 PMCID: PMC9002187 DOI: 10.7518/hxkq.2022.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 01/05/2022] [Indexed: 04/11/2024]
Abstract
In esthetic rehabilitation, methods used to enhance the margin quality have always been the focus and difficulty of improving the level of diagnosis and treatment, prevention and treatment of complications, and collaboration between clinicians and technicians. However, it is impeded by the ambiguous definition and classification of margin, unstandardized tooth preparation, manufacturing process of restoration, and lack of reliable means of checking the quantitative requirements of preparation or restoration. The digital technologies that are increasingly applied, such as intra-oral scanner, impression scanner, and computerized numerical control cutting machine, have strict requirements about margin quality. Failure of recognizing margins by these scanners will hinder the digital process of diagnosis and treatment. Even if these sharp and narrow margins are successfully scanned, they cannot be milled accurately. To overcome these problems, this article demonstrated the clear and complete definition of preparation margin and restoration margin, as well as their subclassifications, by analyzing the target restoration space from a geometric perspective. Practical approaches to measuring the margin width and inspecting the margin quality were proposed. The new and full understanding and proposal about preparation margin and restoration margin characterized by measurements will effectively support the thoroughly digitalized process of esthetic rehabilitation using porcelain in fixed prosthodontics, which is based on the guidance of values.
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Affiliation(s)
- Haiyang Yu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Li Yue
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Weicai Liu
- Hospital of Stomatology, Tongji University, Shanghai 200072, China
| | - Feng Liu
- School and Hospital of Stomatology, Peking University, Beijing 100081, China
| | - Lina Niu
- School of Stomatology, The Fourth Military Medical University, Xi,an 710032, China
| | - Longquan Shao
- Nanfang Hospital, Southern Medical University, Guangzhou 510280, China
| | - Hongbing Liao
- College of Stomatology, Guangxi Medical University, Nanning 530013, China
| | - Xiaoping Luo
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - Hongbo Li
- Research Institute of Stomatology, Chinese PLA General Hospital, Beijing 100853, China
| | - Qingsong Jiang
- Beijing Stomatological Hospital, School of Stomatology, Capital Medical University, Beijing 100006, China
| | - Hao Yu
- School and Hospital of Stomatology, Fujian Medical University, Fuzhou 350002, China
| | - Bin Zhao
- Shanxi Medical University School and Hospital of Stomatology, Taiyuan 030012, China
| | - Zhe Wu
- Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou 510013, China
| | - Changyi Li
- Stomatological Hospital, Tianjin Medical University, Tianjin 300070, China
| | - Guofeng Wu
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - Yan Wang
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou 510055, China
| | - Yandong Mou
- Dept. of Stomatology, Sichuan Provincial People,s Hospital, University of Electronic Science and Technology of China, Chengdu 610072, China
| | - Yunsong Liu
- School and Hospital of Stomatology, Peking University, Beijing 100081, China
| | - Haiyang Zhang
- Hospital of Stomatology, Jilin University, Changchun 130021, China
| | - Jihua Chen
- School of Stomatology, The Fourth Military Medical University, Xi,an 710032, China
| | - Hongchen Liu
- Research Institute of Stomatology, Chinese PLA General Hospital, Beijing 100853, China
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Zandinejad A, Khanlar LN, Barmak AB, Tagami J, Revilla-León M. Surface Roughness and Bond Strength of Resin Composite to Additively Manufactured Zirconia with Different Porosities. J Prosthodont 2022; 31:97-104. [PMID: 35313023 DOI: 10.1111/jopr.13434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/09/2021] [Indexed: 11/30/2022] Open
Abstract
PURPOSE To investigate the bond strength of resin cement to additively manufactured (AM) zirconia with different porosities when compared to milled zirconia. MATERIALS AND METHODS A 12 × 5 mm disk virtual design file was used to fabricate a total of 48 disks divided into 4 groups: 3 groups were AM with different porosities including 0%-porosity (AMZ0 group), 20%-porosity (AMZ20 group), and 40%-porosity (AMZ40 group), and 1 milled zirconia (control or CNCZ group). The dimensions of all specimens were measured using a digital caliper. A 3D- confocal laser scanner was used to analyze surface morphology and measure the surface roughness (Sa), followed by SEM analysis. Tensile bond strength of composite resin cement to specimens was measured before and after aging procedures using a universal testing machine (n = 10). Failure modes were evaluated under a light microscope. Volumetric change data was analyzed using one-way ANOVA, and two-way ANOVA was used to compare bond strength values (α = 0.05). RESULTS There was a significant difference in volumetric changes among the groups. The CNCZ group showed the least changes in diameter 0.027 ± 0.029 mm and thickness 0.030 ± 0.012 mm and AM zirconia with 40% porosity showed the most volumetric changes in diameter 5.237 ± 0.023 mm. ANOVA test indicated an overall significant difference in surface roughness across all groups (F = 242.6, p < 0.001). The CNCZ group showed the highest mean Sa of 1.649 ± 0.240 µm, followed by AMZ40 group with Sa of 0.830 ± 0.063 µm, AMZ20 group with Sa of 0.780 ± 0.070 µm, and the AMZ0 group with Sa of 0.612 ± 0.063 µm. Two-way ANOVA showed significant difference in bond strength between the CNCZ group 12.109 ± 3.223 MPa and the AMZ0 group 8.629 ± 0.914 MPa, with significant pretest failures in specimens with porosities. Thermal cycling methods reduced the bond strength non-significantly in CNCZ group with no effect in the AMZ0 group. CONCLUSION Milled zirconia had a higher surface roughness and bond strength to composite resin cement than AM zirconia, and porosities in AM zirconia decreased the bond strength with significant pretest failures.
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Affiliation(s)
- Amirali Zandinejad
- Department of comprehensive dentistry, College of Dentistry, Texas A&M University, Dallas, TX
| | - Leila Nasiry Khanlar
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Abdul Basir Barmak
- Department of comprehensive dentistry, EIOH Medical Center, University of Rochester, Rochester, NY
| | - Junji Tagami
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Marta Revilla-León
- Department of comprehensive dentistry, School of Dentistry, University of Washington, Seattle, WA.,Department of comprehensive dentistry, Revilla Research Center, Madrid, Spain
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Wear Behavior of Different Generations of Zirconia: Present Literature. Int J Dent 2022; 2022:9341616. [PMID: 35295406 PMCID: PMC8920625 DOI: 10.1155/2022/9341616] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 01/16/2022] [Accepted: 02/10/2022] [Indexed: 12/22/2022] Open
Abstract
Objective. The wear behavior of the novel zirconia generation is less well understood and may be affected by compositional modifications compared to the conventional zirconia. Materials and Methods. Combinations of keywords such as “zirconia,” “high translucent,” and “wear” were searched in PubMed and Google Scholar databases up to May 2021. The total of 23 relevant articles was selected according to inclusion criteria. Results. Reports show comparable wear resistance of translucent zirconia to the conventional zirconia despite an increased cubic phase content and lower mean flexural strength. A meticulously polished surface creates the lowest surface roughness, producing favorable zirconia wear resistance and antagonist wear compared to a glazed surface. In comparison to other ceramic materials, zirconia produces the least wear on an enamel antagonist and almost undetectable wear when opposed by zirconia. Wear when paired against resin materials yields a favorable outcome, whereas wear behavior against a metal antagonist varies with the surface hardness of the metal. Conclusions. All zirconia generations are considered wear-friendly to all types of antagonists. Nonetheless, comparative studies on antagonist wear opposing zirconia of different compositions are still limited and further investigation is required.
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50
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Revolution of Current Dental Zirconia: A Comprehensive Review. Molecules 2022; 27:molecules27051699. [PMID: 35268800 PMCID: PMC8911694 DOI: 10.3390/molecules27051699] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/16/2022] [Accepted: 03/02/2022] [Indexed: 01/27/2023] Open
Abstract
The aim of this article is to comprehensively review the revolution of dental zirconia (Zir), including its types, properties, applications, and cementation procedures. A comprehensive search of PubMed and Embase was conducted. The search was limited to manuscripts published in English. The final search was conducted in October 2021. Newly developed monolithic Zir ceramics have substantially enhanced esthetics and translucency. However, this material must be further studied in vitro and in vivo to determine its long-term ability to maintain its exceptional properties. According to the literature, monolithic translucent Zir has had promising results and a high survival rate. Thus, the utilization of this material is indicated when strength and esthetics are needed. Both the materials and methods used for cementation of monolithic Zir have significantly improved, encouraging dentists to use this material, especially when a conservative approach is required. Zir restorations showed promising outcomes, particularly for monolithic Zir crowns supported with implant and fixed dental prostheses.
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