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Awad MM, Alhalabi F, Alanazi AA, Alanazi AA, Alshahrani GA, Fu C, Albaijan RS, Alkattan R, Fawzy AS. "No-Primer" Resin Cementation of Lithium Disilicate Ceramic: A Microtensile Bond Strength Evaluation. MATERIALS (BASEL, SWITZERLAND) 2023; 17:137. [PMID: 38203993 PMCID: PMC10779915 DOI: 10.3390/ma17010137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 12/18/2023] [Accepted: 12/22/2023] [Indexed: 01/12/2024]
Abstract
OBJECTIVE The objective of this study was to evaluate the resin-ceramic adhesion of a long-carbon-chain silane (LCSI)-containing resin cement. METHODS Polished lithium disilicate ceramic discs were etched with hydrofluoric acid and randomly assigned into four groups; (PSAP), cemented using a silane-free resin cement with no prior priming; (PSAP-S), primed using a silane-containing primer before cementation using a silane-free resin cement; (PSAU), cemented using a LCSI-containing resin cement with no prior priming; (PSAU-S), primed as for the group (PSAP-S) and cemented using a LCSI-containing resin cement. The cemented blocks were sectioned into microbeams. The resin-ceramic microtensile bond strength (μTBS) was measured at 1 week and after thermocycling. The failure modes of the tested microbeams were evaluated. RESULTS The μTBS of the LCSI-containing and silane-free resin cements, either with or without a prior priming step, did not significantly differ. The adhesion of the LCSI-containing resin cement to lithium disilicate ceramic, either with or without a prior priming step, did not significantly deteriorate after artificial aging. CONCLUSIONS The long-carbon-chain silane (LCSI) monomer incorporated in the resin cement eliminated the need for a silane priming step of a hydrofluoric acid-etched lithium disilicate ceramic.
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Affiliation(s)
- Mohamed M. Awad
- UWA Dental School, University of Western Australia, 17 Monash Avenue, Nedlands, WA 6009, Australia; (C.F.) (A.S.F.)
| | - Feras Alhalabi
- Department of Conservative Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Abdulaziz Abdullah Alanazi
- College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; (A.A.A.); (A.A.A.); (G.A.A.)
| | - Abdulaziz Ali Alanazi
- College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; (A.A.A.); (A.A.A.); (G.A.A.)
| | - Ghanem Abdullah Alshahrani
- College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia; (A.A.A.); (A.A.A.); (G.A.A.)
| | - Cheryl Fu
- UWA Dental School, University of Western Australia, 17 Monash Avenue, Nedlands, WA 6009, Australia; (C.F.) (A.S.F.)
| | - Refal Saad Albaijan
- Department of Prosthetic Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia;
| | - Rana Alkattan
- Restorative and Prosthetic Dental Sciences, College of Dentistry, King Saud Bin Abdulaziz University for Health Sciences, Riyadh 11545, Saudi Arabia;
- King Abdullah International Medical Research Center, Ministry of National Guard Health Affairs, Riyadh 11545, Saudi Arabia
| | - Amr S. Fawzy
- UWA Dental School, University of Western Australia, 17 Monash Avenue, Nedlands, WA 6009, Australia; (C.F.) (A.S.F.)
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Piemjai M, Donpinprai C. Improving retention of dental veneers fabricated from an experimental enamel-based biopolymer compared with CAD/CAM hybrid materials. Heliyon 2023; 9:e16219. [PMID: 37215792 PMCID: PMC10199219 DOI: 10.1016/j.heliyon.2023.e16219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 05/06/2023] [Accepted: 05/10/2023] [Indexed: 05/24/2023] Open
Abstract
Objectives CAD/CAM hybrid materials have become increasingly utilized in restorative dentistry. However, their low tensile bond strength (TBS) may lead to the detachment of minimally invasive restorations. When prepared, an experimental enamel-based biopolymer prosthesis provided a honeycomb-like interfacial layer with luting adhesives leading to a higher TBS than Ni-Cr-Be based alloy, lithium disilicate-based ceramic, and cured-resin-composite. This study aimed to compare TBSs of dental veneers fabricated from experimental biopolymer and commercial hybrid materials bonded to enamel using two different luting adhesives. Methods Laminate veneers (4 × 4 mm) 1 mm thick were prepared from commercial CAD/CAM blocks: VITA ENAMIC, SHOFU Block HC, KATANA AVENCIA, and an experimental biopolymer. The flat bonding surface of the veneers was ground to 600-grit, followed by 50-μm alumina air-abrading for standardization. Each veneer was fixed on flat ground bovine enamel using either Super-Bond C&B or RelyX™ U200 resin (n = 10). The surface treatment and bonding procedures were treated as recommended by the manufacturers. All bonded specimens were stored in water at 37 °C for 24 h before tensile testing with a universal testing machine at a cross-headed speed of 1.0 mm/min. The fractured surface was examined with a stereomicroscope and scanning electron microscope. TBS data were statistically analyzed using two-way ANOVA and Tukey's HSD test (α = 0.05). Results Experimental biopolymer veneers demonstrated the highest mean TBS with cohesive failure in the luting agents. Adhesive failure at the veneer side interface was found in other groups. There was no significant difference between the two luting agents. Conclusion The results indicate that the experimental biopolymer veneer bonded to enamel provided the best retention. The TBS at the enamel-resin interface is higher than at the veneer-resin interface for all commercial CAD/CAM hybrid materials. Clinical significance An experimental enamel-based biopolymer veneer can provide better retention than CAD/CAM hybrid materials in clinical treatment.
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Alegría-Acevedo LF, Gutiérrez MF, Perdigão J, Núñez A, Méndez-Bauer L, Dávila-Sanchez A, Reis A, Loguercio AD. In Vitro Performance of Different Universal Adhesive Systems on Several CAD/CAM Restorative Materials After Thermal Aging. Oper Dent 2022; 47:107-120. [PMID: 35226751 DOI: 10.2341/20-203-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: 03/20/2021] [Indexed: 11/23/2022]
Abstract
OBJECTIVE To evaluate the microshear bond strength (mSBS) of 10 universal adhesive systems applied on five different CAD/CAM restorative materials, immediately and after thermal aging. METHODS AND MATERIALS Five CAD/CAM materials were selected: 1) feldspathic glass ceramic (FeCe); 2) pre-polymerized reinforced resin composite (ReRC); 3) leucite-reinforced glass ceramic (LeGC); 4) lithium disilicate (LiDi); and 5) yttrium-stabilized zirconium dioxide (ZiDi). For each material, 15 blocks were cut into four rectangular sections (6 × 6 × 6 mm; n=60 per group) and processed as recommended by the respective manufacturer. For each indirect material, the following adhesive systems were applied according to the respective manufacturer's instructions: 1) AdheSE Universal [ADU]; 2) All-Bond Universal [ABU]; 3) Ambar Universal [AMB]; 4) Clearfil Universal Bond [CFU]; 5) Futurabond U [FBU]; 6) One Coat 7 Universal [OCU]; 7) Peak Universal Bond [PUB]; 8) Prime&Bond Elect [PBE]; 9) Scotchbond Universal Adhesive [SBU]; 10) Xeno Select [XEN, negative control]. After the application of the adhesive system, cylinder-shaped transparent matrices were filled with a dual-curing resin cement (NX3) and light cured. Specimens were tested in shear mode at 1.0 mm/ min (mSBS), after 24 hours and 10,000 thermal cycles (TC). All data were submitted to statistical analysis (α=0.05). RESULTS For FeCe, there was no significant decrease in mean mSBS for AMB, FBU, and SBU after TC when compared at 24 hours. For ReRC, AMB and SBU showed higher mean mSBS when compared to CFU and XEN, after 24 hours and TC. For LiDi, FBU and OCU showed higher mean mSBS when compared to CFU and XEN, after 24 hours and TC. For LeGC, AMB and PUB showed higher mean mSBS when compared to XEN, after 24 hours and TC. For ZiDi, OCU and SBU showed higher mean mSBS when compared to XEN, after 24 hours and TC. In addition, PBE and XEN showed the lowest mean mSBS after TC with higher percentage of bond strength reduction. CONCLUSIONS The mean mSBS among the different universal adhesives varied widely for each CAD/ CAM material used. In addition, most universal adhesives underwent a statistically significant bond strength reduction after TC.
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Affiliation(s)
- L F Alegría-Acevedo
- Luisa F Alegria-Acevedo, DDS, MS, PhD, Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Paraná, Brazil
| | - M F Gutiérrez
- Mario Felipe Gutiérrez, DDS, MS, PhD, professor, Universidad de los Andes, Facultad de Odontología, Santiago, Chile, and University of Chile, Faculty of Dentistry, Institute for Research in Dental Sciences, Santiago, Chile
| | - J Perdigão
- *Jorge Perdigão, DMD, MS, PhD, University of Minnesota, Department of Restorative Sciences, Minneapolis, MN, USA, and Universidade Católica Portuguesa, Faculty of Dental Medicine, Centre for Interdisciplinary Research in Health, Viseu, Portugal
| | - A Núñez
- Alejandra Núñez, DDS, MS, PhD student, Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Paraná, Brazil, and Universidad San Francisco de Quito USFQ, Department of Restorative Dentistry and Dental Materials, School of Dentistry, Quito, Ecuador
| | - L Méndez-Bauer
- Luján Méndez-Bauer, DDS, PhD, professor, Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Paraná, Brazil, and Universidad Francisco Marroquín, Faculty of Dentistry, Department of Research, Cidad de Guatemala, Guatemala
| | - A Dávila-Sanchez
- Andrés Dávila-Sanchez, DDS, Ms, PhD, professor, Universidad San Francisco de Quito USFQ, Department of Restorative Dentistry and Dental Materials, School of Dentistry, Quito, Ecuador
| | - A Reis
- Alessandra Reis, DDS, PhD, professor, Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Paraná, Brazil
| | - A D Loguercio
- Alessandro D Loguercio, DDS, MS, PhD, professor, Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Paraná, Brazil
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Sarahneh O, Günal-Abduljalil B. The effect of silane and universal adhesives on the micro-shear bond strength of current resin-matrix ceramics. J Adv Prosthodont 2021; 13:292-303. [PMID: 34777719 PMCID: PMC8558573 DOI: 10.4047/jap.2021.13.5.292] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 09/24/2021] [Accepted: 10/18/2021] [Indexed: 11/21/2022] Open
Abstract
PURPOSE The aim of this in vitro study was to evaluate the effect of silane and universal adhesive applications on the micro-shear bond strength (µSBS) of different resin-matrix ceramics (RMCs). MATERIALS AND METHODS A total of 120 slides (14 × 12 × 1 mm) were produced from 5 different RMC materials (GC Cerasmart [GC]; Brilliant Crios [BC]; Grandio blocs [GB]; Katana Avencia [KA]; and KZR-CAD HR 2 [KZR]) and sandblasted using 50 µm Al2O3 particles. Each RMC material was divided into six groups according to the surface conditioning (SC) method as follows: control (G1), silane primer (G2), silane-free universal adhesive (G3), silane-containing universal adhesive (G4), silane primer and silane-free universal adhesive (G5), and silane primer and silane-containing universal adhesive (G6). Three cylindric specimens made from resin cement (Bifix QM) were polymerized over the treated surface of each slide (n = 12). After thermal cycling (10000 cycles, 5 – 55℃), µSBS test was performed and failure types were evaluated using a stereomicroscope. Data were analyzed using 2-way ANOVA and Tukey tests (α = .05). RESULTS µSBS values of specimens were significantly affected by the RMC type and SC protocols (P < .001) except the interaction (P = .119). Except for G2, all SC protocols showed a significant increase in µSBS values (P < .05). For all RMCs, the highest µSBS values were obtained in G4 and G6 groups. CONCLUSION Only silane application did not affect the µSBS values regardless of the RMC type. Moreover, the application of a separate silane in addition to the universal adhesives did not improve the µSBS values. Silane-containing universal adhesive was found to be the best conditioning method for RMCs.
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Affiliation(s)
- Omar Sarahneh
- Department of Prosthodontics, Faculty of Dentistry, Near East University, Nicosia, Turkey
| | - Burcu Günal-Abduljalil
- Department of Prosthodontics, Faculty of Dentistry, Near East University, Nicosia, Turkey
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Kim YR, Kim JH, Son SA, Park JK. Effect of Silane-Containing Universal Adhesives on the Bonding Strength of Lithium Disilicate. MATERIALS 2021; 14:ma14143976. [PMID: 34300895 PMCID: PMC8307548 DOI: 10.3390/ma14143976] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/12/2021] [Accepted: 07/13/2021] [Indexed: 11/20/2022]
Abstract
The purpose of this study was to investigate the effect of silane-containing universal adhesives on the bonding strength of lithium disilicate. Two-hundred-and-forty lithium disilicate blocks were divided into 16 groups according to the following surface treatments: hydrofluoric acid (HF)-treated or not, silane-treated or not, and the type of universal adhesive used (All-Bond Universal (ABU); Prime & bond (PB); Clearfil Universal Bond (CU); Single bond Universal (SBU)). After surface treatment, resin discs were bonded to each lithium disilicate using dual-cure resin cement. Bonded specimens were stored in distilled water for 24 h and then subjected to microtensile bond strength (μTBS) test. Failure modes were examined under stereomicroscope. Microscopic observation of bonded interfaces was analyzed using scanning electron microscopy. The μTBS data were statistically analyzed. Regardless of silane treatment, all groups treated with HF showed higher bonding strengths compared to those that were not treated with HF (p < 0.05). In groups treated with HF, the bonding strength increased after silane application (p < 0.05) except PB and CU (p > 0.05). Adhesive failures were dominant in all groups, but some mixed failures were observed in ABU treated with HF and silane. While most of the specimens that were not treated with silane after HF application only showed loose bonding between the ceramic and resin cement due to partial gaps, the specimens treated with silane application after HF showed a tight ceramic–resin interface. In conclusion, the silane in universal adhesives did not effectively improve the bonding strength between lithium disilicate and resin cement.
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Affiliation(s)
- Yu-Ri Kim
- Department of Conservative Dentistry, Dental Research Institute, Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan 50612, Korea; (Y.-R.K.); (S.-A.S.)
| | - Jae-Hoon Kim
- Department of Dental Education, Dental Research Institute, Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan 50612, Korea;
| | - Sung-Ae Son
- Department of Conservative Dentistry, Dental Research Institute, Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan 50612, Korea; (Y.-R.K.); (S.-A.S.)
| | - Jeong-Kil Park
- Department of Conservative Dentistry, Dental Research Institute, Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan 50612, Korea; (Y.-R.K.); (S.-A.S.)
- Correspondence: ; Tel.: +82-55-360-5221
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Nagasawa Y, Eda Y, Shigeta H, Ferrari M, Nakajima H, Hibino Y. Effect of sandblasting and/or priming treatment on the shear bond strength of self-adhesive resin cement to CAD/CAM blocks. Odontology 2021; 110:70-80. [PMID: 34272634 DOI: 10.1007/s10266-021-00635-y] [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: 04/13/2021] [Accepted: 06/24/2021] [Indexed: 11/30/2022]
Abstract
The aim of this study was to investigate the effect of two different priming agents and/or sandblasting on the shear bond strength of self-adhesive resin cement to the resin composite for core build-up to CAD/CAM blocks. A CAD/CAM ceramic block (GN I CERAMIC BLOCK, GC) and a CAD/CAM resin composite block (CERASMART 270, GC), a self-adhesive resin cement (G-CEM ONE, GC) and two different primers, i.e., a multipurpose primer (MP; G-Multi Primer, GC) and a ceramic primer (CP; Ceramic Primer II, GC), were examined. Five different surface treatments with priming and/or sandblasting and no surface treatment (control) were performed on the block. Disk specimens (6 mm in diameter and 4 mm in thickness) made from core composites were cemented to the blocks after the surface treatments. Then, the 24-h shear bond strength of the resin cement between the block and the resin composite core was determined (n = 15). Sandblasted specimens had greater bond strength than controls for both blocks (p < 0.05). Priming to both blocks significantly increased the bond strength of resin cement compared to that of controls (p < 0.05). Although Weibull moduli were not significantly changed among all surface treatments for both blocks, the strengths with 5% and 95% failure probability of sandblasted and/or primed blocks were estimated to be greater than those of controls. The combination of priming and sandblasting to the CAD/CAM composite and ceramic surface was effective in increasing the bond strength of the resin cement.
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Affiliation(s)
- Yuko Nagasawa
- Division of Dental Biomaterials Science, Department of Restorative and Biomaterials Sciences, Meikai University School of Dentistry, 1-1, Keyakidai, Sakado, Saitama, 350-0283, Japan.
| | - Yoshikazu Eda
- Division of Dental Biomaterials Science, Department of Restorative and Biomaterials Sciences, Meikai University School of Dentistry, 1-1, Keyakidai, Sakado, Saitama, 350-0283, Japan
| | - Hirotaka Shigeta
- Division of Dental Biomaterials Science, Department of Restorative and Biomaterials Sciences, Meikai University School of Dentistry, 1-1, Keyakidai, Sakado, Saitama, 350-0283, Japan
| | - Marco Ferrari
- Department of Prosthodontics and Dental Materials, School of Dental Medicine, University of Siena, Viale Mario Bracci, 16, Siena, Italy
| | - Hiroshi Nakajima
- Division of Dental Biomaterials Science, Department of Restorative and Biomaterials Sciences, Meikai University School of Dentistry, 1-1, Keyakidai, Sakado, Saitama, 350-0283, Japan
| | - Yasushi Hibino
- Division of Dental Biomaterials Science, Department of Restorative and Biomaterials Sciences, Meikai University School of Dentistry, 1-1, Keyakidai, Sakado, Saitama, 350-0283, Japan
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Günal-Abduljalil B, Önöral Ö, Ongun S. Micro-shear bond strengths of resin-matrix ceramics subjected to different surface conditioning strategies with or without coupling agent application. J Adv Prosthodont 2021; 13:180-190. [PMID: 34234928 PMCID: PMC8250191 DOI: 10.4047/jap.2021.13.3.180] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 06/09/2021] [Accepted: 06/14/2021] [Indexed: 11/08/2022] Open
Abstract
PURPOSE This study aimed to assess the influence of various micromechanical surface conditioning (MSC) strategies with or without coupling agent (silane) application on the micro-shear bond strength (µSBS) of resin- matrix ceramics (RMCs). MATERIALS AND METHODS GC Cerasmart (GC), Lava Ultimate (LU), Vita Enamic (VE), Voco Grandio (VG), and Brilliant Crios (BC) were cut into 1.0-mm-thick slices (n = 32 per RMC) and separated into four groups according to the MSC strategy applied: control-no conditioning (C), air-borne particle abrasion with aluminum oxide particles (APA), 2W- and 3W-Er,Cr:YSGG group coding is missing. The specimens in each group were further separated into silane-applied and silane-free subgroups. Each specimen received two resin cement microtubules (n = 8 per subgroup). A shear force was applied to the adhesive interface through a universal test machine and µSBS values were measured. Data were statistically analyzed by using 3-way ANOVA and Tukey HSD test. Failure patterns were scrutinized under stereomicroscope. RESULTS RMC material type, MSC strategy, and silanization influenced the µSBS values (P<.05). In comparison to the control group, µSBS values increased after all other MSC strategies (P<.05) while the differences among these strategies were insignificant (P>.05). For control and APA, there were insignificant differences between RMCs (P>.05). The silanization decreased µSBS values of RMCs except for VE. Considerable declines were observed in GC and BC (P<.05). CONCLUSION MSC strategies can enhance bond strength values at the RMC - cement interface. However, the choice of MSC strategy is dependent on RMC material type and each RMC can require a dedicated way of conditioning.
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Affiliation(s)
- Burcu Günal-Abduljalil
- Department of Prosthodontics, Faculty of Dentistry, Near East University, Mersin, Turkey
| | - Özay Önöral
- Department of Prosthodontics, Faculty of Dentistry, Near East University, Mersin, Turkey
| | - Salim Ongun
- Department of Prosthodontics, Faculty of Dentistry, Near East University, Mersin, Turkey
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Abdou A, Takagaki T, Alghamdi A, Tichy A, Nikaido T, Tagami J. Bonding performance of dispersed filler resin composite CAD/CAM blocks with different surface treatment protocols. Dent Mater J 2020; 40:209-219. [PMID: 33162457 DOI: 10.4012/dmj.2020-049] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The effect of various pretreatments on the bonding of a resin cement to resin-composite CAD/CAM blocks (RCBs) was examined. The surface of dispersed-filler RCBs (DF-RCBs) and a polymer infiltrated ceramic network RCB (PICN-RCB) was roughened using hydrofluoric acid etching (HF) or sandblasting, and followed by silanization and/or universal adhesive (UA) application. Microtensile bond strength (µTBS), surface roughness parameters (arithmetical mean height (Sa); developed interfacial area ratio (Sdr)), and critical surface energy (γc) were determined. For most DF-RCBs, the highest µTBS was obtained using HF+UA. UA application to DF-RCBs resulted in similar or higher µTBS compared to silanization, which indicates that silane treatment is not crucial for DF-RCBs, especially after HF. In contrast, the highest µTBS to PICN-RCB was obtained with silanization. Both roughening pretreatments significantly increased the surface roughness parameters and the γc of all RCBs. The γc was positively correlated with Sa (r=0.756, p<0.001) and Sdr (r=0.837, p<0.001).
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Affiliation(s)
- Ahmed Abdou
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.,Biomaterials Department, Faculty of Oral and Dental Medicine, Modern University for Technology and Information
| | - Tomohiro Takagaki
- Department of Operative Dentistry, Division of Oral Functional Science and Rehabilitation, School of Dentistry, Asahi University
| | - Ali Alghamdi
- Al-Mikwah Dental Center, Saudi Ministry of Health
| | - Antonin Tichy
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.,Institute of Dental Medicine, First Faculty of Medicine of the Charles University and General University Hospital in Prague
| | - Toru Nikaido
- Department of Operative Dentistry, Division of Oral Functional Science and Rehabilitation, School of Dentistry, Asahi University
| | - Junji Tagami
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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Haralur SB, Alamrey AA, Alshehri SA, Alzahrani DS, Alfarsi M. Effect of different preparation designs and all ceramic materials on fracture strength of molar endocrowns. J Appl Biomater Funct Mater 2020; 18:2280800020947329. [DOI: 10.1177/2280800020947329] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Objective: The aim was to compare the fracture strength of Molar endocrowns fabricated from different all-ceramic materials and various preparation designs. Materials and methods: Ninety extracted human molar teeth were root canal treated and randomly divided into three groups according to the all ceramic materials used for fabrication of the endocrowns ( n = 30): (1) Lithium disilicate (IPS e.max Press); (2) Polymer infiltrated ceramic (Vita Enamic); (3) High translucency zirconia (Ceramill Zolid HT). Each group was subdivided into 3 subgroups ( n = 10) according to the preparation design as 2 mm occlusal reduction, 4.5 mm occlusal reduction, and 4.5 mm occlusal reduction with 2 mm radicular extension. The endocrowns from each material were fabricated and surface treated according to the manufacturer’s recommendations. After cementation with self-adhesive resin luting cement, the specimens were stored in a humid environment for 72 hours and subsequently subjected to 5000 thermal cycles. After, a compressive, static-axial load was applied using a universal testing machine until failure. Load-to-failure was recorded (N) and the specimens were examined under a stereomicroscope to determine the failure type. The data was statistically analyzed using One-way ANOVA and Tukey HSD tests at p < 0.05. Results: The Lithium Disilicate endocrowns recorded the higher mean fracture strength for 4.5 mm occlusal thickness and 2 mm radicular extension at 3770.28 N and 3877.40 correspondingly. The High translucency zirconia endocrowns at conventional 2 mm thickness showed the highest mean fracture load (3533.34 N). Even though polymer infiltrated ceramic endocrowns displayed comparatively lesser fracture load; they recorded the predominantly favorable fractures. Conclusions: Increased occlusal thickness showed a significant improvement in fracture strength of lithium disilicate and polymer infiltrated ceramic molar endocrowns. Although the 2 mm radicular extension had the substantial enhancement of fracture strength in high translucency zirconia, it resulted in more unfavorable failure types.
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Affiliation(s)
- Satheesh B Haralur
- Department of Prosthodontics, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - Alaa Ali Alamrey
- College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | | | | | - Mohammed Alfarsi
- Department of Prosthodontics, College of Dentistry, King Khalid University, Abha, Saudi Arabia
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Nagasawa Y, Hibino Y, Eda Y, Nakajima H. Effect of surface treatment of CAD/CAM resin composites on the shear bond strength of self-adhesive resin cement. Dent Mater J 2020; 40:364-378. [PMID: 33100298 DOI: 10.4012/dmj.2019-431] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study examined the effects of sandblasting, hydrofluoric acid etching and priming on the shear bond strength of self-adhesive resin cement between seven different CAD/CAM resin composites and a resin composite core material at 24-h after cement mixing. Five surface treatments [control (C), sandblasting (S), priming (P), sandblasting with priming (SP), and 9% HF etching with priming (HFP)] were performed respectively for disc specimens of CAD/CAM blocks. There were no significant differences in bond strength among the C, S, and P, except for one block (p>0.05). SP showed a greater bond strength than S. Weibull moduli were not changed significantly among all treatments for all blocks, whereas the strengths with 5% and 95% failure probability of SP and HFP showed greater values than the others. The bond strengths of HFP were comparable to those of SP. Priming after sandblasting or HF etching could be effective to increase the bond strength of CAD/CAM blocks.
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Affiliation(s)
- Yuko Nagasawa
- Division of Dental Biomaterials Science, Department of Restorative and Biomaterials Sciences, Meikai University School of Dentistry
| | - Yasushi Hibino
- Division of Dental Biomaterials Science, Department of Restorative and Biomaterials Sciences, Meikai University School of Dentistry
| | - Yoshikazu Eda
- Division of Dental Biomaterials Science, Department of Restorative and Biomaterials Sciences, Meikai University School of Dentistry
| | - Hiroshi Nakajima
- Division of Dental Biomaterials Science, Department of Restorative and Biomaterials Sciences, Meikai University School of Dentistry
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