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Jané-Chimeno L, Gil A, Jaen-Gutiérrez R, Freire P, Jané-Chimeno A, Ruales-Suárez G. New adhesive rehabilitation technique with indexed occlusal tabletops made by 3D printing technology. J ESTHET RESTOR DENT 2024. [PMID: 38979970 DOI: 10.1111/jerd.13278] [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: 03/09/2024] [Revised: 06/20/2024] [Accepted: 06/26/2024] [Indexed: 07/10/2024]
Abstract
OBJECTIVE In oral rehabilitation, a full mouth minimal invasive treatment can represent a major challenge for the patient and the dentist. The purpose of this article is to present a new technique to restore eroded teeth and recover the vertical dimension with a simple and predictable technique. CLINICAL CONSIDERATIONS Occlusal tabletop restorations are a suitable conservative option to restore anatomy and vertical dimension augmentation but highly sensitive. The cementation of those restorations without stable landmarks, the cement excess removal, the insertion path, or the time needed are some of the difficulties can be faced. Now a days with the new CAD-CAM techniques is possible to develop a new occlusal tabletop manufacturing alternative utilizing 3D-printed technology by unifying the restorations with a customized connector that allows us to print several onlays at same time, as a single object, also being cemented at once. CONCLUSIONS This protocol reduces the technique sensitivity of a vertical dimension oral rehabilitation process, reduce the chair time, enhancing the patient-comfort and delivers a unique way to restore dental lost anatomy as a definitive or temporary way with printing materials. CLINICAL SIGNIFICANCE With the advent of new CAD-CAM 3D printing materials, which are increasingly versatile and gaining favor among clinicians, it is now possible to address complex clinical situations with greater predictability. This technology enables the development of treatment solutions that are both effective and efficient, consequently reducing clinical time for the patient.
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Affiliation(s)
- Luis Jané-Chimeno
- Department of Restorative Dentistry, School of Dentistry, International University of Catalunya, Barcelona, Spain
| | - Alfonso Gil
- University of Southern California, Los Angeles, USA
| | | | - Patricia Freire
- Department of Restorative Dentistry, School of Dentistry, International University of Catalunya, Barcelona, Spain
- Department Surgery, Internacional University of Catalunya, Barcelona, Spain
| | - Adela Jané-Chimeno
- Department of Restorative Dentistry, School of Dentistry, International University of Catalunya, Barcelona, Spain
| | - Gerardo Ruales-Suárez
- Department of Restorative Dentistry, School of Dentistry, International University of Catalunya, Barcelona, Spain
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Jurado CA, Afrashtehfar KI, Robles M, Alaqeely RS, Alsayed HD, Lindquist TJ, Alhotan A. Effect of preparation design and endodontic access on fracture resistance of zirconia overlays in mandibular molars: An in vitro study. J Prosthodont 2024. [PMID: 38734932 DOI: 10.1111/jopr.13865] [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: 04/15/2023] [Accepted: 04/17/2024] [Indexed: 05/13/2024] Open
Abstract
PURPOSE To evaluate the fracture resistance of zirconia overlays, considering various preparation designs and the presence of endodontic access. MATERIALS AND METHODS Ninety translucent zirconia (5Y-PSZ) overlay restorations were divided into six groups (n = 15/group) based on different preparation designs, with and without endodontic access: chamfer margin 4 mm above the gingival level without (group 1) and with endodontic access (group 2); margin 2 mm above the gingival level without (group 3) and with endodontic access (group 4); overlay with no chamfer margin without (group 5) and with endodontic access (group 6). Restorations were bonded to mandibular first molar resin dies, and the groups with endodontic access were sealed with flowable resin composite. All restorations underwent 100,000 cycles of thermal cycling between 5°C and 55°C, followed by loading until fracture. Maximum load and fracture resistance were recorded. ANOVA with Tukey post-hoc tests were used for statistical comparison (α < 0.05). RESULTS Fracture resistance significantly varied among overlay designs with and without endodontic access (p < 0.001), except for the no-margin overlays (groups 5 and 6). Overlays with a 2 mm margin above the gingival margin with endodontic access (group 4) exhibited significantly higher fracture resistance compared to both the 4-mm supragingival (group 2) and no-margin (group 6) designs, even when compared to their respective intact groups (groups 1 and 5). There were no significant differences between the no-margin and 4-mm supragingival overlays. CONCLUSION The more extensive zirconia overlay for mandibular molars is the first choice since the 2 mm margin above the gingival level design withstood considerable loads even after undergoing endodontic access. A no-margin overlay is preferred over the 4-mm supragingival design as it preserves more tooth structure and there was no outcome difference, irrespective of endodontic access. Caution is warranted in interpreting these findings due to the in vitro nature of the study.
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Affiliation(s)
- Carlos A Jurado
- Operative Dentistry Division, Department of General Dentistry, University of Tennessee Health Science Center College of Dentistry, Memphis, Tennessee, USA
| | - Kelvin I Afrashtehfar
- Department of Reconstructive Dentistry and Gerodontology (RekGero), School of Dental Medicine, University of Bern, Bern, Switzerland
- Evidence-Based Practice Unit (EBPU), Clinical Sciences Department, College of Dentistry, Ajman University, Ajman City, UAE
- Prosthodontics Private Practice, Dental Clinics, Abu Dhabi, UAE
- Artificial Intelligence Research Center (AIRC), Ajman University, Dubai, UAE
| | - Manuel Robles
- Department of Restorative Dentistry, Universidad del Valle De Mexico, Hermosillo, Sonora, Mexico
| | - Razan S Alaqeely
- Department of Periodontics, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Hussain D Alsayed
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saudi University, Riyadh, Saudi Arabia
| | - Terry J Lindquist
- Department of Prosthodontics, The University of Iowa College of Dentistry and Dental Clinics, Iowa City, Iowa, USA
| | - Abdulaziz Alhotan
- Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
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Yazigi C, Alawi S, Wille S, Lehmann F, Kern M. Durability of Resin Bonding to Dental 3Y-TZP Zirconia Using Different Adhesive Systems. MATERIALS (BASEL, SWITZERLAND) 2024; 17:424. [PMID: 38255594 PMCID: PMC10820740 DOI: 10.3390/ma17020424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 12/22/2023] [Accepted: 01/11/2024] [Indexed: 01/24/2024]
Abstract
This laboratory study was conducted to evaluate and compare the resin bond strength of different adhesive resin systems in different combinations and the durability of their bonds with zirconia ceramic. MATERIALS AND METHODS One hundred and twenty-eight specimens were milled from 3Y-TZP zirconia ceramic. The bonding surfaces of all disks were wet polished, steam cleaned, airborne-particle abraded and ultrasonically cleaned in 99% isopropanol. The specimens were randomly divided into four main groups according to the applied resin system; two conventional and two self-adhesive systems were used. Each group was further subdivided into two subgroups; the first was conditioned with the specified primer for conventional luting resins or not conditioned for the self-adhesive systems, whereas the second subgroup of each was conditioned with the same phosphate monomer-containing primer (Alloy Primer). The zirconia specimens were adhesively bonded, using the allocated luting resin, to plexiglass tubes filled with self-curing composite resin (Clearfil FII). Half of the specimens of each subgroup were stored in distilled water at 37 °C for 3 days, whereas the other half were subjected to artificial aging, 150 days of storage and additional thermal cycling. Thereafter, all specimens were subjected to TBS testing using a universal testing machine. Statistical analysis was conducted using two-way ANOVA followed by separate one-way ANOVAs. The Games-Howell post-hoc test was applied for pairwise comparisons. RESULTS All specimens survived storage with thermal cycling. The mean TBS values ranged from a minimum of 43.4 ± 5.0 MPa to a maximum of 66.4 ± 3.5 after 3 days and from a minimum of 13.6 ± 2.5 MPa to a maximum of 50.1 ± 9.4 MPa after 150 days. CONCLUSIONS Artificial aging had a significantly negative effect on all test groups. The chosen adhesive-resin system had a significant effect on the resulting TBS values. The highest TBS values were achieved for the self-adhesive luting resin G-Cem One but were statistically comparable to the results obtained for the dual-cure luting resin G-Cem LinkForce.
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Jurado CA, Lee D, Ramirez P, Cortes-Treviño DA, Tsujimoto A. Fracture Resistance of Chairside CAD/CAM Lithium Disilicate-reinforced Ceramic Occlusal Veneers With and Without Margin and Full Coverage Crowns. Oper Dent 2024; 49:84-90. [PMID: 38058016 DOI: 10.2341/23-043-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: 07/31/2023] [Indexed: 12/08/2023]
Abstract
OBJECTIVE The aim of this investigation was to compare the fracture resistance of chairside computer-aided design and computer-aided manufacturing (CAD/CAM) lithium disilicate-reinforced ceramic occlusal veneers with and without margin and traditional full coverage premolar crowns. METHODS AND MATERIALS A total of 60 chairside CAD/CAM lithium disilicate-reinforced ceramic (Amber Mill, Hass Bio) restorations were designed and fabricated with a chairside CAD/CAM system (CEREC Dentsply Sirona). The restorations were divided into three groups (n=20): 1) occlusal veneer with 1.0-mm uniform occlusal thickness and with chamfer margin; 2) occlusal veneer with 1.0-mm uniform occlusal thickness and without margin; and 3) full coverage crown with uniform occlusal thickness and gingival margin. Occlusal veneers and crowns were cemented with dual cured resin luting cement (Multilink, Ivoclar Vivadent) to printed resin dies, load cycled (5 million load cycles at 1 Hz with 275 N force), and then loaded until fracture. Load at break (LB) and peak load (PL) until fracture were recorded. Scanning electron microscope images of the tested restorations on the abutments were obtained. RESULTS Fracture strengths were different depending on the design of the restoration. There was no significant difference in fracture strength between the two types of occlusal veneer (LB: 1132.45 N; PL: 1143.30 N for veneers with margin; LB: 1149.25 N; PL: 1219.05 N for veneers without margin). Full coverage crowns showed the lowest fracture resistance (LB: 936.26 N, PL: 976.42 N), which was significantly lower than both designs of occlusal veneer. CONCLUSIONS The fracture resistance of the CAD/CAM lithium disilicate-reinforced ceramic restorations was influenced by the design. Occlusal veneers with and without margin displayed higher fracture resistance than traditional crowns.
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Affiliation(s)
- C A Jurado
- Carlos Alberto Jurado, DDS, MS, clinical associate professor, University of Iowa College of Dentistry and Dental Clinics, Iowa City, IA, USA
| | - D Lee
- Damian Lee, DDS, MS, associate professor and chair, Department of Prosthodontics, Tufts University School of Dental Medicine, Boston, MA, USA
| | - P Ramirez
- Paulette Ramirez, BS, dental student, Texas Tech University Health Sciences Center El Paso, Woody L. Hunt School of Dental Medicine, El Paso, TX, USA
| | - D A Cortes-Treviño
- Daniel Alberto Cortes-Treviño, DDS, MS, private practice, Dallas, TX, USA
| | - A Tsujimoto
- *Akimasa Tsujimoto, DDS, PhD, professor and chair, Department of Operative Dentistry, Aichi Gakuin University School of Dentistry, Nagoya, Aichi, Japan; adjunct associate professor, Department of Operative Dentistry, University of Iowa College of Dentistry, Iowa City, Iowa, USA; visiting associate professor, Department of General Dentistry, Creighton University School of Dentistry, Omaha, NE, USA
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Ghodsi S, Shekarian M, Aghamohseni MM, Rasaeipour S, Arzani S. Resin cement selection for different types of fixed partial coverage restorations: A narrative systematic review. Clin Exp Dent Res 2023; 9:1096-1111. [PMID: 37427500 PMCID: PMC10728549 DOI: 10.1002/cre2.761] [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: 11/12/2021] [Revised: 06/10/2023] [Accepted: 06/17/2023] [Indexed: 07/11/2023] Open
Abstract
OBJECTIVE The aim of this study was to review the selection criteria of resin cements for different types of partial coverage restorations (PCRs) and investigate if the type of restorations or restorative materials affect the type of selected resin cement. MATERIALS AND METHODS An electronic search (1991-2023) was performed in PubMed, Medline, Scopus, and Google Scholar databases by combinations of related keywords. RESULTS A total of 68 articles were included to review the selection criteria based on the advantages, disadvantages, indications, and performance of resin cements for different types of PCRs. CONCLUSIONS The survival and success of PCRs are largely affected by appropriate cement selection. Self-curing and dual-curing resin cements have been recommended for the cementation of metallic PCRs. The PCRs fabricated from thin, translucent, and low-strength ceramics could be adhesively bonded by light-cure conventional resin cements. Self-etching and self-adhesive cements, especially dual-cure types, are not generally indicated for laminate veneers.
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Affiliation(s)
- Safoura Ghodsi
- Dental Research Center, Dentistry Research Institute, Department of ProsthodonticsTehran University of Medical SciencesTehranIran
| | - Mina Shekarian
- Dental Research Center, Dental Research Institute, School of DentistryIsfahan University of Medical SciencesIsfahanIran
| | | | - Sasan Rasaeipour
- Fellowship in Implant DentistryTehran University of Medical SciencesTehranIran
| | - Sarah Arzani
- Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-Communicable DiseaseIsfahan University of Medical SciencesIsfahanIran
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Tribst JPM, Tach Q, de Kok P, Dal Piva AMDO, Kuijs RH, Kleverlaan CJ. Thickness and Substrate Effect on the Mechanical Behaviour of Direct Occlusal Veneers. Int Dent J 2023; 73:612-619. [PMID: 36509557 PMCID: PMC10509395 DOI: 10.1016/j.identj.2022.11.006] [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: 11/07/2022] [Accepted: 11/09/2022] [Indexed: 12/13/2022] Open
Abstract
PURPOSE This study aimed to evaluate the fracture resistance and stress magnitude of occlusal veneers made of conventional or flowable resin composites at different minimal thicknesses bonded on enamel or dentin. MATERIAL AND METHODS A total of 120 sound bovine incisors were flattened and used as substrates (enamel or dentin) for the restorations. The teeth were embedded into polymethyl methacrylate and allocated into 4 groups according to the resin composite (Clearfil AP-X PLT and Clearfil Majesty Flow, Kuraray Dental) and substrate. Further, the substrates were randomly subdivided in 12 groups (N = 120, n = 10) according to the occlusal veneer minimal thickness: 0.5, 1.0, or 2.0 mm. The teeth were directly restored with a standardised procedure. Then, the specimens were loaded until fracture in a universal testing machine (Instron 6022, Instron Corp.). A 3-way and a 1-way analysis of variance were used to determine significant differences for each factor. Three-dimensional finite element analysis was carried out following the in vitro boundary conditions to assess the stress magnitude in the restoration during compressive loading. RESULTS The fracture loads were recorded into initial load to failure (ILF) and fatal load to failure (FLF). Differences were found in material for ILF and FLF, leading to an overall equal good performance in fracture load and stress distribution for both materials, regardless of the substrate. Differences in thickness were apparent in both ILF and FLF. CONCLUSIONS Direct conventional and flow resin composite occlusal veneers present a promising mechanical behaviour when bonded on enamel or dentin. However, caution is advised when preparing 0.5-mm minimal thickness restorations.
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Affiliation(s)
- João Paulo M Tribst
- Department of Oral Regenerative Medicine, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, The Netherlands
| | - Qais Tach
- Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, The Netherlands; Private practice, Rotterdam, The Netherlands
| | - Paul de Kok
- Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, The Netherlands
| | - Amanda Maria de O Dal Piva
- Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, The Netherlands.
| | - Ruud H Kuijs
- Department of Oral Regenerative Medicine, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, The Netherlands
| | - Cornelis J Kleverlaan
- Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, The Netherlands
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Unterschütz L, Fuchs F, Mayer LA, Koenig A, Challakh N, Schulz-Kornas E, Ziebolz D, Hahnel S. Influence of dental prophylaxis procedures on the tooth veneer interface in resin-based composite and polymer-infiltrated ceramic veneer restorations: an in vitro study. Clin Oral Investig 2023; 27:2595-2607. [PMID: 36502509 PMCID: PMC10264478 DOI: 10.1007/s00784-022-04816-z] [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: 06/13/2022] [Accepted: 11/30/2022] [Indexed: 12/14/2022]
Abstract
OBJECTIVES The aim of this study was to investigate the influence of dental prophylaxis cleaning procedures and artificial aging on veneers in human teeth. The external marginal and internal tooth veneer as well as the restoration surfaces were examined. MATERIAL AND METHODS Thirty-two extracted premolars were restored with resin-based composite (RBC) and polymer-infiltrated ceramic network (PICN) veneers. Artificial aging by alternating thermocycling and subsequent prophylaxis procedure (glycine-based powder air polishing or ultrasonic scaling) was conducted for five consecutive cycles. The external marginal interface was examined by height profile measurements and the internal interface was investigated using micro X-ray computed tomography. In addition, the surface texture of the veneer surface was analyzed using confocal laser scanning microscopy. RESULTS The application of both prophylaxis procedures resulted in a deepening of the marginal interface (10 µm ± 8 µm) for materials. Furthermore, the internal interface of PICN restorations showed marginal gaps after both treatments and artificial aging (16 µm ± 3 µm). In contrast to the RBC specimens, a significant increase in surface roughness was identified for PICN veneers after ultrasonic scaling. CONCLUSIONS The marginal and internal interface regions in veneers fabricated from PICN and RBC were affected by prophylaxis procedures. Furthermore, it may result in increased veneer surface roughness, especially in PICN and after ultrasonic scaling, which might affect bioadhesion and longevity. CLINICAL RELEVANCE After dental prophylaxis procedures, examination of the marginal and the internal interface as well as the veneer surface provides a precise insight into damage mechanisms and offers an assessment of longevity.
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Affiliation(s)
- Lena Unterschütz
- Department of Prosthetic Dentistry and Dental Material Science, Leipzig University, Liebigstraße 12, 04103, Leipzig, Germany
| | - Florian Fuchs
- Department of Prosthetic Dentistry and Dental Material Science, Leipzig University, Liebigstraße 12, 04103, Leipzig, Germany.
| | - Laura-Antonia Mayer
- Department of Prosthetic Dentistry and Dental Material Science, Leipzig University, Liebigstraße 12, 04103, Leipzig, Germany
| | - Andreas Koenig
- Department of Prosthetic Dentistry and Dental Material Science, Leipzig University, Liebigstraße 12, 04103, Leipzig, Germany
| | - Nadia Challakh
- Department of Cariology, Endodontology and Periodontology, Leipzig University, Liebigstraße 12, 04103, Leipzig, Germany
| | - Ellen Schulz-Kornas
- Department of Cariology, Endodontology and Periodontology, Leipzig University, Liebigstraße 12, 04103, Leipzig, Germany
| | - Dirk Ziebolz
- Department of Cariology, Endodontology and Periodontology, Leipzig University, Liebigstraße 12, 04103, Leipzig, Germany
| | - Sebastian Hahnel
- Department of Prosthetic Dentistry, UKR University Hospital Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Germany
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Crins LAMJ, Opdam NJM, Kreulen CM, Bronkhorst EM, Huysmans MCDNJM, Loomans BAC. Randomised controlled trial on testing an increased vertical dimension of occlusion prior to restorative treatment of tooth wear. J Oral Rehabil 2023; 50:267-275. [PMID: 36582043 DOI: 10.1111/joor.13408] [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: 08/23/2022] [Revised: 12/13/2022] [Accepted: 12/23/2022] [Indexed: 12/31/2022]
Abstract
BACKGROUND Evaluation of a new vertical dimension of occlusion (VDO) in complex restorative treatments is considered a necessary step prior to placement of restorations. OBJECTIVES This randomised controlled trial (RCT) aimed to assess the effects of using an evaluation of a VDO increase before restorative treatment in patients with moderate-to-severe tooth wear, on OHRQoL, freeway space (FWS) and interventions to restorations. METHODS Forty-two patients with tooth wear were included and randomly allocated to either a test phase with a Removable Appliance (RA) or no test phase. Restorative treatment consisted of restoration of all teeth using composite restorations in an increased VDO. OHIP-score, freeway space (FWS) and clinical acceptability of restorations were assessed at baseline and at recall appointments (1 month and 1 year). Intervention to restoration was scored in case of material chipping or when the abutment tooth had increased sensitivity that could be linked to occlusal overloading. ANCOVA analyses, Univariate Cox regression, t-tests and descriptive analyses were performed (p < .05). RESULTS Clinical follow-up after 1 year was completed for 41 patients. No significant effect of testing the VDO with a RA could be found on the OHIP-score (p = .14). Reduction of FWS in the RA group, compared to the control group, was significantly lower at 1 year (p = .01, 95% CI -1.09 to -0.15). No effect on early interventions to restorations was found (p = .94). CONCLUSION This RCT showed that a removable appliance is not indicated to functionally test the increased VDO prior to restorative treatment in patients with tooth wear.
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Affiliation(s)
- Luuk A M J Crins
- Department of Dentistry, Radboud University Medical Center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands
| | - Niek J M Opdam
- Department of Dentistry, Radboud University Medical Center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands
| | - Cees M Kreulen
- Department of Dentistry, Radboud University Medical Center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands
| | - Ewald M Bronkhorst
- Department of Dentistry, Radboud University Medical Center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands
| | | | - Bas A C Loomans
- Department of Dentistry, Radboud University Medical Center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands
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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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El Ashry MF, Hammad IA, Abdel Raheem IM. Cast-free modified digital twin-stage technique for complete mouth rehabilitation: A dental technique. J Prosthet Dent 2022. [DOI: 10.1016/j.prosdent.2022.08.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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11
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Elbadawy AA, Omar EA, AbdElaziz MH. MicroCT evaluation for CAD/CAM occlusal veneer fit using two materials and three cement space settings. Braz Dent J 2022; 33:71-78. [PMID: 36043571 PMCID: PMC9645188 DOI: 10.1590/0103-6440202204764] [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: 11/05/2021] [Accepted: 04/20/2022] [Indexed: 11/24/2022] Open
Abstract
This study was aimed to evaluate the fit of occlusal veneer restoration for two
CAD/CAM materials with different cement space settings, using microCT scans.
Sixty resin dies were made and divided into two groups (n=30) according to the
materials, (I): Hybrid all-ceramic, and (II): zirconia-reinforced lithium
silicate glass-ceramic. Each group was subdivided into three subgroups (n=10)
according to the cement space parameters (30, 40, and 50 µm). Occlusal veneers
for the six subgroups were milled. A circle with 20 different sections was
placed at the center of every scanned specimen to measure four different
locations (Occlusal, Axial, Marginal, and Absolute marginal discrepancy). Data
were analyzed using two-way ANOVA at a 0.05 level of significance. There was no
statistically significant effect of material type on the mean values of internal
and marginal gaps for the three cement space parameters (P>0.05). There were
no statistically significant differences in the occlusal and axial gap between
the cement space parameters, furthermore, there were statistically significant
differences in marginal gap distances and absolute marginal discrepancies
(P>0.05). Hybrid all-ceramic showed smaller marginal and internal
discrepancies than zirconia-reinforced lithium silicate glass-ceramic without
statistically significant differences, and, for both materials, 50 µm cement
space significantly improved the marginal fit and absolute marginal
discrepancy.
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Affiliation(s)
| | - Elsayed Ali Omar
- Department of Prosthodontics, College of dentistry, Taif University. Al Hawiyah, Saudi Arabia
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Schlichting LH, Resende TH, Reis KR, Raybolt Dos Santos A, Correa IC, Magne P. Ultrathin CAD-CAM glass ceramic and composite resin occlusal veneers for the treatment of severe dental erosion: An up to 3-year randomized clinical trial. J Prosthet Dent 2022; 128:158.e1-158.e12. [PMID: 35750501 DOI: 10.1016/j.prosdent.2022.02.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 02/03/2022] [Accepted: 02/03/2022] [Indexed: 11/16/2022]
Abstract
STATEMENT OF PROBLEM Ultrathin bonded posterior occlusal veneers represent a conservative alternative to traditional onlays and complete coverage crowns for the treatment of erosive dental wear. Data regarding the clinical performance of ceramic and composite resin ultrathin occlusal veneers are lacking. PURPOSE The purpose of this prospective randomized clinical trial was to evaluate the influence of computer-aided design and computer-aided manufacturing (CAD-CAM) restorative material (ceramic versus composite resin) on the clinical performance of ultrathin occlusal veneers bonded to worn posterior teeth. MATERIAL AND METHODS Eleven participants (mean age, 30.4 years) had their posterior teeth restored with 24 ceramic (e.max CAD) and 36 composite resin (Lava Ultimate) ultrathin occlusal veneers. The material type was assigned randomly. The tooth preparations were trial restoration driven and included immediate dentin sealing (OptiBond FL). The intaglio surfaces of the ceramic restorations were etched with hydrofluoric acid and silanated, and the composite resins were airborne-particle abraded and silanated. The tooth preparations were airborne-particle abraded and etched with phosphoric acid before restoration insertion. All restorations were adhesively luted with preheated composite resin (Filtek Z100). The participants were evaluated according to the modified United States Public Health Service (USPHS) criteria at baseline and then each year for up to 3 years. Survival rates were estimated with time to failure (primary outcome of interest) as the endpoint (scores 4 or 5). RESULTS No restorations were lost. Five partial failures, in the form of chipping (all scored 4), were observed in the composite resin group (Lava Ultimate). The Kaplan-Meier survival rates were 100% for ceramic and 84.7% (SE 0.065%) for composite resin. Differences between the 2 groups were not statistically significant (P=.124). In the surviving restorations, significant difference (P=.003) was found for surface roughness as restorations in the composite resin group experienced some surface degradation. CONCLUSIONS The findings of this medium-term clinical trial suggest that ceramic (e.max CAD) and composite resin (Lava Ultimate) CAD-CAM ultrathin occlusal veneers presented statistically comparable performance regardless of the minor partial failures (restorable chipping) observed in the composite resin group. Higher surface degradation was observed in the composite resin group.
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Affiliation(s)
- Luís Henrique Schlichting
- Associate Professor, Operative Dentistry, Division of Comprehensive Oral Health, UNC Adams School of Dentistry, Chapel Hill, NC.
| | - Tayane Holz Resende
- Assistant Professor, Department of Prosthodontics and Dental Materials, School of Dentistry, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Kátia Rodrigues Reis
- Associate Professor, Department of Prosthodontics and Dental Materials, School of Dentistry, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Aline Raybolt Dos Santos
- Associate Professor, Department of Prosthodontics and Dental Materials, School of Dentistry, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Ivo Carlos Correa
- Professor, Department of Prosthodontics and Dental Materials, School of Dentistry, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Pascal Magne
- The Don and Sybil Harrington Professor of Esthetic Dentistry, Restorative Sciences, Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, Calif
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Ladino L, Sanjuan ME, Valdez DJ, Eslava RA. Clinical and Biomechanical Performance of Occlusal Veneers: A Scoping Review. J Contemp Dent Pract 2021; 22:1327-1337. [PMID: 35343461 DOI: 10.5005/jp-journals-10024-3226] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
AIM This manuscript aims to evaluate, through a scoping review, current knowledge of the biomechanical behavior, materials, preparations, and limitations of occlusal veneers. BACKGROUND Occlusal veneers are a minimally invasive alternative for the additive restoration of posterior teeth with significant loss of the occlusal structure. This type of restoration has been emerged in recent years as an alternative to invasive treatment, which in the same way seeks to restore the structure of the posterior teeth. All this is because in recent years restorative dentistry has focused a large part of its objectives on conservative therapies. REVIEW RESULTS Five electronic databases-PubMed, Cochrane, LILACS, EMBASE, and Google Scholar-were searched. Title and abstracts were independently screened by three reviewers, followed by a full-text review. A total of 42 articles met our inclusion criteria; most of these studies were in vitro (n = 35) and other studies were clinical studies (n = 7). These in vitro studies included 21 studies that analyzed the type of preparation and 6 studies that evaluated the limitations of occlusal veneers. CONCLUSION Thicknesses between 0.7 and 1.0 mm are recommended for ceramic materials; in addition, thicknesses less than 0.7 mm are recommended to use polymeric materials. The materials used for this type of restoration are plastic- and ceramic-based materials, whose load resistance values were found to exceed 2000 N in most studies. It is recommended to carry out a minimally invasive preparation or not to carry out a dental preparation, as long as there is a peripheral enamel to make an external bevel that redirects the eccentric forces to the axis of the tooth. CLINICAL SIGNIFICANCE Restorative dentistry has moved toward conservative treatments with the least amount of dental tissue being removed. Occlusal veneers appear to be a conservative option in the reconstruction of tooth tissues lost due to tooth wear and in cases where it is necessary to restore or increase the vertical dimension.
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Affiliation(s)
- LuisGabriel Ladino
- LuisGabriel Ladino, Department of Prosthodontics, Institución Universitaria Colegios de Colombia (UNICOC), Bogota, DC, Colombia, Phone: +57 3057979215, e-mail:
| | - Martin Eduardo Sanjuan
- Department of Prosthodontics, Institución Universitaria Colegios de Colombia (UNICOC), Bogota, DC, Colombia
| | - Darell Josué Valdez
- Department of Prosthodontics, Institución Universitaria Colegios de Colombia (UNICOC), Bogota, DC, Colombia
| | - Rosa Angelica Eslava
- Department of Prosthodontics, Institución Universitaria Colegios de Colombia (UNICOC), Bogota, DC, Colombia
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Diken Turksayar AA, Hisarbeyli D, Seçkin Kelten Ö, Bulucu NB. Wear behavior of current computer-aided design and computer-aided manufacturing composites and reinforced high performance polymers: An in vitro study. J ESTHET RESTOR DENT 2021; 34:527-533. [PMID: 34655152 DOI: 10.1111/jerd.12828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 10/01/2021] [Accepted: 10/04/2021] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To analyze the wear rate of computer-aided design and computer-aided manufacturing (CAD/CAM) composites, polyetheretherketones and glass ceramics. MATERIAL AND METHODS Our study groups were prepared from two different resin-based composites (Brillant Crios, Cerasmart), a glass ceramic (IPS Emax CAD) and reinforced polyetheretherketone (BioHPP) material (n = 10). Premolar teeth were used as antagonists. The specimens, which were subjected to two body wear tests (240,000 cycles, 1.2 Hz, 50N) in the chewing simulator, were scanned with a 3D laser scanner both before and after the wear test. Volume loss and wear depth were determined by means of the obtained images software program. The wear pattern was examined by scanning electron microscopy. Kruskal Wallis test served for analyzing. RESULTS The least volume loss and wear depth were seen in the polyetheretherketone material (0.06 ± 0.04 mm3 , 0.02 ± 0.01 mm), while the maximum volume loss was seen in the groups containing resin-based composite. (p = 0.05). The volume loss value in glass ceramics is between CAD/CAM composites and polyetheretherketone. CONCLUSION The behavior of polyetheretherketone against enamel was different from glass ceramics and composite materials in terms of the amount of wear. CLINICAL SIGNIFICANCE Polyetheretheketone can be considered as an alternative to other chairside materials in terms of wear resistance.
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Affiliation(s)
| | - Duygu Hisarbeyli
- Department of Restorative Dentistry, Oral and Dental Health Center, İstanbul, Turkey
| | - Özlem Seçkin Kelten
- Department of Restorative Dentistry, Oral and Health Center, Kırıkkale, Turkey
| | - Naime Bilinç Bulucu
- Faculty of Dentistry, Department of Restorative Dentistry, Biruni University, İstanbul, Turkey
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15
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Peng M, Li C, Huang C, Liang S. Digital technologies to facilitate minimally invasive rehabilitation of a severely worn dentition: A dental technique. J Prosthet Dent 2021; 126:167-172. [DOI: 10.1016/j.prosdent.2020.05.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 05/05/2020] [Accepted: 05/05/2020] [Indexed: 10/23/2022]
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16
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Lima VP, Soares K, Caldeira VS, Faria-E-Silva AL, Loomans B, Moraes RR. Airborne-particle Abrasion and Dentin Bonding: Systematic Review and Meta-analysis. Oper Dent 2021; 46:E21-E33. [PMID: 32926155 DOI: 10.2341/19-216-l] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/19/2019] [Indexed: 11/23/2022]
Abstract
CLINICAL RELEVANCE The literature reviewed suggests that airborne particle abrasion has no negative effects on the bond strength of resin-based materials to dentin and that a positive influence on dentin bond strength was only achieved in specific air-abrasion conditions. SUMMARY In this systematic review the authors investigated how airborne-particle abrasion (APA) using aluminum oxide affects the bond strength of resin-based materials to dentin. The search was performed in three databases. In vitro studies (Type of study) comparing the bond strength of resin-based materials (Outcome) to air-abraded (Intervention) compared with non-air-abraded (Comparison) human dentin (Population) were included (the PICOT elements are given parenthetically). From 5437 unique articles, 65 were read in full, 33 were included in the qualitative synthesis, and 32 were included in the meta-analysis. Methodologic quality and risk of bias were assessed. Comparisons were performed between air-abraded and control dentin groups by adopting a random-effects model (α=0.05). Additional analyses were carried out for the different parameters used in APA: type of surface treatment in the control group, particle size, air pressure, and APA duration. The bond strength to air-abraded dentin was favored only when the control surface was treated with a hand excavator. For particle size, APA was favored when the particle size was >30 μm and the controls were no treatment or hand excavator or when the particle size was ≤30 μm and the control was bur. In addition, the results favored air-abraded groups only when the pressure was > 5 bar and bur was used in the control group. No significant differences were observed for duration of APA. No comparison on bond strength considering the presence of aging conditions was possible in the included studies due to the low number of studies that aged the specimens. In conclusion, APA had no negative effects on the bond strength of resin-based materials to dentin and was able to improve the dentin bond strength only when the particle size was > 30 μm and air pressure was > 5 bar. PROSPERO registration protocol: CRD42018096128.
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Taha Y, Raslan F, Ali A, Roig M. Guided tooth preparation device fabricated with a complete digital workflow: A dental technique. J Prosthet Dent 2020; 125:221.e1-221.e4. [PMID: 33176923 DOI: 10.1016/j.prosdent.2020.10.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 10/06/2020] [Accepted: 10/07/2020] [Indexed: 11/16/2022]
Abstract
Guided tooth preparations allow clinicians to provide fixed dental prostheses for dentate patients in an efficient manner. One approach uses a digital preparation device technique where the preparation of a tooth needing a crown is guided by a device. Compared with conventional techniques, this method allows for accurate abutment preparation more efficiently and with improved quality. By controlling tooth preparation, this method preserves natural tooth structure and provides adequate clearance for the restorative material. To illustrate this technique, an adhesive minimally invasive fixed complete-mouth rehabilitation was provided by using a 3D-printed digital preparation device.
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Affiliation(s)
- Yazan Taha
- Resident, Department of Restorative Dentistry, School of Dentistry, International University of Catalunya, Barcelona, Spain
| | - Fady Raslan
- Assistant Professor, Department of Restorative Dentistry, School of Dentistry, International University of Catalunya, Barcelona, Spain.
| | - Akram Ali
- Associate Professor, Department of Restorative Dentistry, School of Dentistry, International University of Catalunya, Barcelona, Spain
| | - Miguel Roig
- Chairman and Professor, Department of Restorative Dentistry, School of Dentistry, International University of Catalunya, Barcelona, Spain
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18
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de Carvalho ABG, Dal Piva AMDO, Tribst JPM, Werner A, Saavedra GDSFA, Kleverlaan CJ. Effect of microwave crystallization on the wear resistance of reinforced glass-ceramics. J Mech Behav Biomed Mater 2020; 111:104009. [DOI: 10.1016/j.jmbbm.2020.104009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/16/2020] [Accepted: 07/21/2020] [Indexed: 10/23/2022]
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19
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Valenzuela EBS, Andrade JP, da Cunha PFJS, Bittencourt HR, Spohr AM. Fracture load of CAD/CAM ultrathin occlusal veneers luted to enamel or dentin. J ESTHET RESTOR DENT 2020; 33:516-521. [PMID: 32949221 DOI: 10.1111/jerd.12658] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/30/2020] [Accepted: 09/04/2020] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To evaluate, in vitro, the fracture load of IPS e.max CAD occlusal veneers at thicknesses of either 0.3 or 0.6 mm luted to enamel or dentin. MATERIALS AND METHODS Fifty human molars were randomly distributed into five groups (n = 10): G1 - healthy teeth (control); G2-0.3-mm-thick veneers luted to enamel; G3-0.6-mm-thick veneers luted to enamel; G4-0.3-mm-thick veneers luted to dentin; and G5-0.6-mm-thick veneers luted to dentin. After the luting procedures, the specimens were immersed in distilled water at 37°C for 24 hours and then subjected to mechanical loading (106 cycles at 200 N load). The specimens were subjected to a fracture load test in a universal testing machine. Two-way ANOVA and Tukey's test (α = 0.05) were used to analyze data. RESULTS Only the thickness factor was significant (P = .002). Values of fracture load followed by distinct letters represent significant differences (P < .05): G1 (3204 N ± 730)ab ; G2 (3144 N ± 729)ab ; G3 (2489 N ± 606)b ; G4 (3591 N ± 776)a ; and G5 (2770 N ± 598)ab . CONCLUSION IPS e.max ultrathin occlusal veneers luted to enamel or dentin obtained fracture load comparable to that of the healthy tooth. CLINICAL SIGNIFICANCE IPS e.max CAD ultrathin occlusal veneers at 0.3 or 0.6-mm-thick seem to provide good perspectives in relation to the clinical use.
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Affiliation(s)
| | - Jonas Pereira Andrade
- Department of Restorative Dentistry, School of Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Hélio Radke Bittencourt
- Department of Statistics, School of Mathematics, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Ana Maria Spohr
- Department of Restorative Dentistry, School of Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
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20
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Lin J, Lin Z, Zheng Z. Effect of different restorative crown design and materials on stress distribution in endodontically treated molars: a finite element analysis study. BMC Oral Health 2020; 20:226. [PMID: 32811484 PMCID: PMC7437004 DOI: 10.1186/s12903-020-01214-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 08/10/2020] [Indexed: 11/23/2022] Open
Abstract
Background The purposes of this simulation study were to evaluate the stresses in the roots of endodontically treated molars with extensive coronal tissue loss which were restored by endocrowns (all-in-one core and crown) and traditional crowns with post-cores, during masticatory simulation using finite element analysis. Methods A mesio-distal cross-section of a lower right first molar was digitized and used to create 2-dimensional models of the teeth and supporting tissue; different crown designs, viz., endocrown with 2 mm occlusal clearance, endocrown with 4 mm occlusal clearance and post-core crown; different crown materials, viz., zirconia (Zr) and lithia-disilicate reinforced glass ceramic (LDRGC), and different post and core materials, viz., glass fiber (GF), stainless steel (SS) and metal cast (MC). An axial load of 600 N was applied to the central fossa of occlusal surface. Results The stress distributions were similar between Zr and LDRGC for periodontal ligament and alveolar bone. The root canal inner wall maximum principal stresses of SS post (70.8 MPa) and MC post (71.4 MPa) were higher than that of GF post (36.0 MPa) and endocrown (2.4 MPa). Conclusion The endocrowns reduced stress concentration for the root canal inner wall in comparison with the conventional post-core crown. Molars restored with endocrowns are less prone to root fracture than those with posts.
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Affiliation(s)
- Jie Lin
- Fujian Key Laboratory of Oral Diseases, School and Hospital of Stomatology, Fujian Medical University, 246 Yangqiao Zhong Road, Fuzhou, Fujian, 350002, People's Republic of China.,Department of Crown and Bridge, School of Life Dentistry at Tokyo, The Nippon Dental University, 1-9-20 Fujimi, Chiyoda-ku, Tokyo, 102-8159, Japan
| | - Zhenxiang Lin
- Department of Stomatology, Hospital of Fujian Provincial Authorities, 68 Guping Road, Fuzhou, Fujian, 350001, People's Republic of China
| | - Zhiqiang Zheng
- Fujian Key Laboratory of Oral Diseases, School and Hospital of Stomatology, Fujian Medical University, 246 Yangqiao Zhong Road, Fuzhou, Fujian, 350002, People's Republic of China.
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Tribst JPM, Dal Piva AMO, Werner A, Anami LC, Bottino MA, Kleverlaan CJ. Durability of staining and glazing on a hybrid ceramics after the three-body wear. J Mech Behav Biomed Mater 2020; 109:103856. [PMID: 32543416 DOI: 10.1016/j.jmbbm.2020.103856] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/08/2020] [Accepted: 05/10/2020] [Indexed: 10/24/2022]
Abstract
Hybrid ceramic is a promising material for monolithic restorations that could require an individualization through the extrinsic staining to improve aesthetics. Due to the possibilities to treat this ceramic prior to staining, this study evaluated the wear resistance of surface treatments prior to staining and glazing a hybrid ceramic. Thirty-two specimens (Vita Enamic) were divided into 8 groups according to the surface treatment prior to the staining (Polishing: Pol, Acid etching: Ac, Sandblasting with Al2O3: Sd or Self-etching silane: Ses) and glaze application (with: gl or without: gl). The specimens were submitted to the ACTA wear machine simulating the presence of food bolus and antagonist. The wear rate of the stain was determined after 7 intervals of 20,000 cycles, using a profilometer. The surface before and after staining, and after wear were inspected using Scanning Electron Microscopy (SEM). The rates were analyzed using three-way ANOVA and Tukey test. The wear was affected by surface treatment, glaze application and number of cycles (p < 0.001). 100% of the staining was removed after 20,000 cycles for Pol, 40,000 for Pol + gl, 60,000 for Ses + gl, 80,000 for Ac, 100,000 for Sd and Ses, 120,000 for Ac + gl and 140,000 for Sd + gl. SEM showed similar worn surfaces. Sandblasting followed by glaze application was the most durable treatment to maintain the external staining on the hybrid ceramic surface when subjected to three-body wear.
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Affiliation(s)
- João P M Tribst
- Post-Graduate Program in Restorative Dentistry (Prosthodontic), Department of Dental Materials and Prosthodontics, São Paulo State University (Unesp/SJC), Institute of Science and Technology, Engenheiro Francisco José Longo Avenue 777, 12245-000, São José dos Campos/SP, Brazil; Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Gustav Mahlerlaan #3004, 1081 LA Amsterdam, Noord-Holland, the Netherlands.
| | - Amanda M O Dal Piva
- Post-Graduate Program in Restorative Dentistry (Prosthodontic), Department of Dental Materials and Prosthodontics, São Paulo State University (Unesp/SJC), Institute of Science and Technology, Engenheiro Francisco José Longo Avenue 777, 12245-000, São José dos Campos/SP, Brazil; Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Gustav Mahlerlaan #3004, 1081 LA Amsterdam, Noord-Holland, the Netherlands.
| | - Arie Werner
- Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Gustav Mahlerlaan #3004, 1081 LA Amsterdam, Noord-Holland, the Netherlands.
| | - Lilian C Anami
- Department of Dentistry, Santo Amaro University (UNISA), São Paulo, R. Prof. Enéas de Siqueira Neto 340, 04829-300, São Paulo/SP, Brazil.
| | - Marco A Bottino
- Post-Graduate Program in Restorative Dentistry (Prosthodontic), Department of Dental Materials and Prosthodontics, São Paulo State University (Unesp/SJC), Institute of Science and Technology, Engenheiro Francisco José Longo Avenue 777, 12245-000, São José dos Campos/SP, Brazil.
| | - Cornelis J Kleverlaan
- Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Gustav Mahlerlaan #3004, 1081 LA Amsterdam, Noord-Holland, the Netherlands.
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Güth JF, Erdelt K, Keul C, Burian G, Schweiger J, Edelhoff D. In vivo wear of CAD-CAM composite versus lithium disilicate full coverage first-molar restorations: a pilot study over 2 years. Clin Oral Investig 2020; 24:4301-4311. [PMID: 32399736 PMCID: PMC7666668 DOI: 10.1007/s00784-020-03294-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 04/17/2020] [Indexed: 12/02/2022]
Abstract
Objectives To present a digital approach to measure and compare material wear behavior of antagonistic first molar restorations made of an experimental CAD/CAM composite (COMP) and lithium disilicate ceramic (LS2) in patients with reconstructed vertical dimension of occlusion (VDO) after generalized hard tissue loss. Methods A total of 12 patients underwent complete full jaw rehabilitation with full occlusal coverage restorations made either of COMP or LS2. The first molar restorations (n = 48) were chosen for wear examination. At annual recall appointments, polyether impressions were taken, and resulting plaster casts were digitalized using a laboratory scanner. Mean observation period was 371 days for first and 769 days for second year. The resulting 96 datasets were analyzed by superimposition of 3-D datasets using an iterative best-fit method. Based on the superimposition data, the wear rates of the occlusal contact areas (OCAs) were calculated. Results For antagonistic restorations made of COMP, the average wear rate was 24.8 ± 13.3 μm/month, while for LS2, it was 9.5 ± 4.3 μm/month in first year, with significant differences (p < 0.0001) between the materials. In second year, monthly wear rates decreased significantly for both materials: COMP (16.2 ± 10.7 μm/month) and LS2 (5.5 ± 3.3 μm/month). Statistical comparison between wear time showed significant differences for both materials: COMP p < 0.037 and LS2 p < 0.001. A logarithmic fit (COMP R2 = 0.081; LS2 R2 = 0.038) of the data was calculated to estimate the wear progression. Significance In patients with reconstructed VDO, restorations made of LS2 show a more stable wear behavior than ones out of experimental CAD/CAM composite. In cases of complete rehabilitation, load bearing CAD/CAM-composite restorations should be critically considered for application due to their occlusal wear behavior. However, when choosing a restorative material, not only the functional occlusal stability should be taken into account but also the prospect of minimally invasive treatment with maximum preservation of natural tooth structures.
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Affiliation(s)
- Jan-Frederik Güth
- Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestrasse 70, 80336 Munich, Germany
| | - Kurt Erdelt
- Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestrasse 70, 80336 Munich, Germany
| | - Christine Keul
- Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestrasse 70, 80336 Munich, Germany
| | - Gintare Burian
- Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestrasse 70, 80336 Munich, Germany
| | - Josef Schweiger
- Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestrasse 70, 80336 Munich, Germany
| | - Daniel Edelhoff
- Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestrasse 70, 80336 Munich, Germany
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Ferrando-Cascales Á, Astudillo-Rubio D, Pascual-Moscardó A, Delgado-Gaete A. A facially driven complete-mouth rehabilitation with ultrathin CAD-CAM composite resin veneers for a patient with severe tooth wear: A minimally invasive approach. J Prosthet Dent 2020; 123:537-547. [DOI: 10.1016/j.prosdent.2019.04.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Revised: 04/06/2019] [Accepted: 04/08/2019] [Indexed: 11/27/2022]
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24
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Dal Piva AM, Tribst JP, Werner A, Anami LC, Bottino MA, Kleverlaan CJ. Three-body wear effect on different CAD/CAM ceramics staining durability. J Mech Behav Biomed Mater 2020; 103:103579. [DOI: 10.1016/j.jmbbm.2019.103579] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 11/28/2019] [Accepted: 12/02/2019] [Indexed: 02/04/2023]
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25
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LeSage BP. CAD/CAM: Applications for transitional bonding to restore occlusal vertical dimension. J ESTHET RESTOR DENT 2020; 32:132-140. [PMID: 31823502 PMCID: PMC7328720 DOI: 10.1111/jerd.12554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 10/15/2019] [Accepted: 11/05/2019] [Indexed: 12/01/2022]
Abstract
OBJECTIVE Explore the best technique for achieving stable and comfortable occlusion. This is critical for long-term oral health and the foundation of durable esthetic, restorative, periodontal, and prosthodontic treatments. CLINICAL CONSIDERATIONS Various techniques and therapies have been proposed for establishing, determining, and restoring ideal centric relation (CR) and vertical dimension of occlusion (VDO) in patients who require restorations and/or full-mouth rehabilitation. An interim prosthesis phase can help establish and stabilize an enhanced esthetics and/or functional outcome for a limited period of time before the definitive dental restorations are placed. Transitional direct composite bonding and its additive nature have provided clinicians and patients with advantages when establishing a physiologic CR and VDO in interim restorations. However, it is time consuming, tedious, and challenging chairside. The author has been using additive CAD/CAM designed and milled restorations for over 10 years to make transitional bonding more efficient, manageable, and predictable. CONCLUSION Transitional bonded prostheses are significantly important to providing patients with an interim therapy to determine if the proposed esthetic outcome and occlusal scheme will function as expected, or if adjustments are needed prior to the delivery of the definitive long-term restorations. CR and VDO are essential for establishing a functional and healthy occlusion, ideal restoration proportions and smile design, and treatment planning esthetic and prosthodontic restorations for long-term durability. CLINICAL SIGNIFICANCE This article reviews CR, VDO, and the characteristics of a CAD/CAM transitional bonding technique in reversing the signs and symptoms of a compromised dentition and reestablishing an ideal esthetic and functional occlusal outcome. Transitional bonded prostheses are significantly important to providing patients with an interim therapy to determine if the proposed esthetic outcome and occlusal scheme will function as expected, or if adjustments are needed prior to the delivery of the definitive long term restorations.
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Affiliation(s)
- Brian P. LeSage
- Beverly Hills Institute of Dental EstheticsBeverly HillsCalifornia
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Saker S, Özcan M, Al-Zordk W. The impact of etching time and material on bond strength of self-adhesive resin cement to eroded enamel. Dent Mater J 2019; 38:921-927. [PMID: 31105158 DOI: 10.4012/dmj.2018-126] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The purpose of this study was to assess the effect of pre-etching time and material on shear bond strength (SBS) of self-adhesive resin cements to eroded and sound enamel. Eroded enamel specimens were assigned into 5 groups (n=20 each) based on enamel surface treatment as follow: Group N, eroded enamel (without surface pre-treatment); Group PH15, 35% H3PO4 etching for 15 s; Group PH30, 35% H3PO4 etching for 30 s; Group L30, 20% lactic acid etching for 30 s and Group L60, 20% lactic acid etching for 60 s.Composite blocks were fabricated and cemented to enamel surfaces with one of two self-adhesive cements. Notched-edge SBS was assessed. Bond strength of self-adhesive cement to eroded enamel surface significantly enhanced following application of 20% lactic acid for 30 s.
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Affiliation(s)
- Samah Saker
- Fixed Prosthodontics Department, Faculty of Dentistry, Mansoura University
| | - Mutlu Özcan
- Dental Materials Unit, Center for Dental and Oral Medicine Clinic for Fixed and Removable Prosthodontics and Dental Materials Science
| | - Walid Al-Zordk
- Fixed Prosthodontics Department, Faculty of Dentistry, Mansoura University
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Mak A, Chio A. Minimally invasive rehabilitation of the worn dentition: a case report utilising adhesive additive techniques and digital technologies. Aust Dent J 2019; 64 Suppl 1:S46-S58. [PMID: 31144321 DOI: 10.1111/adj.12697] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The management of the worn dentition presents an increasing challenge that is encountered more frequently in daily dental practice. The consequences of tooth wear tend to be multifactorial and while they may initially only involve the loss of surface enamel it can progressively lead to significant destruction of the dentition. This paper discusses the management of a tooth wear case where a significant amount of tooth structure has been lost from both the anterior and posterior teeth. Protocols for assessment, treatment planning and restorative management of the tooth wear case are presented demonstrating the use of adhesive additive techniques and digital technologies to achieve functional and aesthetic rehabilitation of the dentition.
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Affiliation(s)
- A Mak
- Woollahra, NSW, Australia
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Angerame D, De Biasi M, Agostinetto M, Franzò A, Marchesi G. Influence of preparation designs on marginal adaptation and failure load of full-coverage occlusal veneers after thermomechanical aging simulation. J ESTHET RESTOR DENT 2019; 31:280-289. [PMID: 30790399 DOI: 10.1111/jerd.12457] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 12/14/2018] [Accepted: 12/27/2018] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To evaluate the fracture resistance and marginal quality of maxillary molars restored using lithium disilicate glass-ceramic (LDG) occlusal veneers with two preparation designs. METHODS Sixteen extracted maxillary molars were assigned to two groups (n = 8). In group 1 (G1), the teeth received a preparation for a conservative full-coverage occlusal veneer restoration with a 90° rounded shoulder margin. In group 2 (G2), the teeth underwent a 1-mm cusp reduction with a marginal chamfer. LDG restorations (IPS e.max CAD) were obtained with the Cerec 3 CAD/CAM system and luted with Variolink II cement. After thermomechanical aging (1 250 000 cycles), the specimens were loaded to fracture. A semiquantitative marginal seal evaluation was performed observing resin replicas of the specimens at the scanning electron microscope. Cement thickness was assessed at the stereomicroscope on sectioned specimens. Collected data were statistically analyzed by parametric and nonparametric tests. RESULTS The maximum load to fracture was 2395.01 ± 150.96 N in G1 and 2408.39 ± 112.66 N in G2. Most of the observed specimens exhibited restorable fractures and continuous margins. Cement thickness was 132 ± 38 μm in G1 and 150 ± 41 μm in G2. No differences between the groups emerged. CONCLUSION This study demonstrated similar satisfactory performance of the two considered preparations designs for occlusal veneer with LDG. CLINICAL SIGNIFICANCE A new minimally invasive occlusal veneer preparation with marginal chamfer exhibited promising fracture resistance and marginal adaptation that were comparable to those of a standard conservative preparation for the restoration of molars with CAD/CAM lithium disilicate occlusal veneers.
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Affiliation(s)
- Daniele Angerame
- University Clinical Department of Medical, Surgical, and Health Sciences, University of Trieste, Trieste, Italy
| | - Matteo De Biasi
- University Clinical Department of Medical, Surgical, and Health Sciences, University of Trieste, Trieste, Italy
| | | | | | - Giulio Marchesi
- University Clinical Department of Medical, Surgical, and Health Sciences, University of Trieste, Trieste, Italy
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Tribst JPM, Dal Piva AMDO, Penteado MM, Borges ALS, Bottino MA. Influence of ceramic material, thickness of restoration and cement layer on stress distribution of occlusal veneers. Braz Oral Res 2018; 32:e118. [DOI: 10.1590/1807-3107bor-2018.vol32.0118] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 10/17/2018] [Indexed: 11/22/2022] Open
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Resende TH, Reis KR, Schlichting LH, Magne P. Ultrathin CAD-CAM Ceramic Occlusal Veneers and Anterior Bilaminar Veneers for the Treatment of Moderate Dental Biocorrosion: A 1.5-Year Follow-Up. Oper Dent 2018; 43:337-346. [DOI: 10.2341/17-007-t] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
Dental biocorrosion can produce a devastating impact on oral health. The restorative phase of the treatment should not cause additional damage of the remaining sound tooth structure. Ultrathin occlusal veneers are a conservative alternative to traditional onlays and complete crowns for the treatment of severe biocorrosive lesions. This strategy is explained in the present case report through a full-mouth rehabilitation of a patient with moderate biocorrosion. Maxillary anterior teeth were restored using the bilaminar technique (lingual direct composite veneers with labial ceramic veneers) and posterior teeth using ultrathin CAD-CAM ceramic occlusal veneers. The technical aspects required for the implementation of this new restorative design are presented with a special emphasis on the control of tooth preparation based on diagnostic wax-up, provisionalization, and the use of CAD-CAM technology.
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Affiliation(s)
- TH Resende
- Tayane H Resende, MS, Analytical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Federal Fluminense University, Niterói, RJ, Brazil
| | - KR Reis
- Kátia R Reis, DDS, MS, PhD, Department of Prosthodontics and Dental Materials, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - LH Schlichting
- Luís H Schlichting, DDS, MS, PhD, Department of General Dentistry, School of Dental Medicine, East Carolina University, Greenville, NC 27834, USA
| | - P Magne
- Pascal Magne, DMD, PhD, The Don & Sybil Harrington Professor of Esthetic Dentistry, Department of Restorative Sciences, Ostrow School of Dentistry, University of Southern California, Los Angeles, CA 90089, USA
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Demir F, Oktay EA, Aydın N, Toksoy Topçu F, Bilgeç E. Aesthetic Smile Coming with Direct Composite Resin Laminate Restorations: Two Case Reports. ANKARA MEDICAL JOURNAL 2018. [DOI: 10.17098/amj.435293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Spitznagel FA, Boldt J, Gierthmuehlen PC. CAD/CAM Ceramic Restorative Materials for Natural Teeth. J Dent Res 2018; 97:1082-1091. [PMID: 29906206 DOI: 10.1177/0022034518779759] [Citation(s) in RCA: 169] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Advances in computer-aided design (CAD) / computer-aided manufacturing (CAM) technologies and their ease of application enabled the development of novel treatment concepts for modern prosthodontics. This recent paradigm shift in fixed prosthodontics from traditional to minimally invasive treatment approaches is evidenced by the clinical long-term success of bonded CAD/CAM glass-ceramic restorations. Today, defect-oriented restorations, such as inlays, onlays, and posterior crowns, are predominately fabricated from glass-ceramics in monolithic application. The variety of CAD/CAM ceramic restorative systems is constantly evolving to meet the increased demands for highly aesthetic, biocompatible, and long-lasting restorations. Recently introduced polymer-infiltrated ceramic network CAD/CAM blocks add innovative treatment options in CAD/CAM chairside 1-visit restorations. The material-specific high-edge stability enables the CAD/CAM machinability of thin restoration margins. Full-contour zirconia restorations are constantly gaining market share at the expense of bilayered systems. Advancements in material science and bonding protocols foster the development of novel material combinations or fabrication techniques of proven high-strength zirconia ceramics. CAD/CAM applications offer a standardized manufacturing process resulting in a reliable, predictable, and economic workflow for individual and complex teeth-supported restorations. More evidence from long-term clinical studies is needed to verify the clinical performance of monolithic polymer-infiltrated ceramic network and zirconia teeth-supported minimally invasive and extensive restorations.
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Affiliation(s)
- F A Spitznagel
- 1 Department of Prosthodontics, School of Dentistry, Heinrich-Heine-University, Düsseldorf, Germany
| | - J Boldt
- 1 Department of Prosthodontics, School of Dentistry, Heinrich-Heine-University, Düsseldorf, Germany
| | - P C Gierthmuehlen
- 1 Department of Prosthodontics, School of Dentistry, Heinrich-Heine-University, Düsseldorf, Germany
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Influence of various bonding techniques on the fracture strength of thin CAD/CAM-fabricated occlusal glass-ceramic veneers. J Mech Behav Biomed Mater 2017; 75:504-511. [PMID: 28843882 DOI: 10.1016/j.jmbbm.2017.08.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/06/2017] [Accepted: 08/10/2017] [Indexed: 11/21/2022]
Abstract
OBJECTIVES To evaluate the efficiency of immediate dentin sealing and the effects of different bonding protocols on the fracture strength of CAD/CAM occlusal veneers bonded to exposed dentin. METHODS Ninety-six extracted maxillary premolars were initially divided into three main groups with 32 specimens each: without immediate dentin sealing, immediate dentin sealing/total etching and immediate dentin sealing/selective etching. Teeth were identically prepared in the dentin to receive occlusal veneers of 0.8mm thickness, milled from lithium disilicate ceramic blocks (IPS e.max CAD). Each main group was later subdivided, according to the pre-cementation surface etching protocol (total/selective), into two subgroups with 16 specimens each. All restorations were adhesively bonded using a resin cement (Variolink Esthetic). Half of the specimens of each subgroup were subjected to thermo-dynamic loading in a chewing simulator with 1,200,000 cycles at 10kg load. The other half and the surviving specimens were subjected to quasi-static loading until failure. Statistical analysis was performed using three-way ANOVA and Tukey's post-hoc tests. RESULTS All specimens except one survived the artificial aging. A significantly higher fracture strength of restorations (p ≤ 0.001) was obtained when immediate dentin sealing was followed regardless of the etching method with values ranging from a minimum of 1122 ± 336N to a maximum of 1853 ± 333N. Neither the pre-cementation treatment nor the artificial aging had a statistical significant effect on the fracture strength. SIGNIFICANCE Immediate dentin sealing protocol is recommended whenever dentin is exposed during the preparation for thin glass-ceramic occlusal veneers.
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Numeric simulation of occlusal interferences in molars restored with ultrathin occlusal veneers. J Prosthet Dent 2017; 117:132-137. [DOI: 10.1016/j.prosdent.2016.07.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 06/07/2016] [Accepted: 06/07/2016] [Indexed: 11/23/2022]
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