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Moreira PM, Carvalho GLM, de Castro Albuquerque R, André CB. Effect of hydrofluoric acid and self-etch ceramic primers on the flexural strength and fatigue resistance of glass ceramics: A systematic review and meta-analysis of in vitro studies. JAPANESE DENTAL SCIENCE REVIEW 2024; 60:198-210. [PMID: 39027733 PMCID: PMC11254839 DOI: 10.1016/j.jdsr.2024.06.001] [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: 10/02/2023] [Revised: 05/06/2024] [Accepted: 06/04/2024] [Indexed: 07/20/2024] Open
Abstract
This systematic review evaluated the effect of different hydrofluoric acid (HF) etching regimens and a self-etch ceramic primer (SECP) on the flexural strength (FS) and fatigue failure load (FFL) of glass-ceramic materials.The identification of relevant studies was conducted by two authors in five databases: PubMED, Scopus, Web Of Science, LILACS and Virtual Health Library (BVS) until July 2022 with no year limit. The analysis was conducted in RevMan 5.4.1 Software (Cochrane Collaboration) using Random effect model at 5 %. The risk of bias of the included studies were assessed. From the 5349 articles identified, 34 were included for quantitative analysis. Meta-analysis showed that for predominantly glassy ceramics, etching with HF 5 % had no significant impact on FS, however, HF acid etching with concentrations greater than 5 % negatively impacted FS. For lithium disilicate glass-ceramics (LDGC) HF acid etching, negatively influenced FS, while increasing the FFL. HF etching negatively affected FS of hybrid ceramics. The self-etch ceramic primer and HF acid etching showed a similar impact on FFL and FS. This meta-analysis indicates that the impact of SECP and HF acid etching on the mechanical behavior of glass ceramics is material-dependent.
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Affiliation(s)
- Paulo Matias Moreira
- Department of Restorative Dentistry, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Rodrigo de Castro Albuquerque
- Department of Restorative Dentistry, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Carolina Bosso André
- Department of Restorative Dentistry, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
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Figueiredo PS, Spazzin AO, Bacchi A, Alessandretti R. Effect of preheating and ultrasound application of resin-based luting agents on the failure load of a lithium disilicate glass-ceramic. J Prosthodont 2024; 33:396-401. [PMID: 37300878 DOI: 10.1111/jopr.13722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 05/31/2023] [Indexed: 06/12/2023] Open
Abstract
PURPOSE To assess the effect of preheating resin-based materials and ultrasound application on the failure load of a lithium disilicate glass-ceramic. MATERIALS AND METHODS Ninety ceramic specimens were produced (14×12×1.0 mm) and divided into 9 groups (n = 10) to be bonded to a dentin analog (Nema G10) with light-cured luting agent (LC), flowable resin composite (FL), and supra-nano filled resin composite (SN), as follows: LC/R - LC at room temperature; LC/P - preheated LC; LC/P/U - preheated LC and Ultrasound; FL/R - FL at room temperature; FL/P - preheated FL; FL/P/U - preheated FL and Ultrasound; SN/R - SN at room temperature; SN/P - preheated SN; SN/P/U - preheated SN and Ultrasound. The failure load test was performed in a universal testing machine with the aid of acoustic detection. The data was analyzed with two-way ANOVA (for failure load) and Weibull statistics (Weibull modulus - m and characteristic strength, based on 95% confidence intervals - CI). RESULTS The analyses of failure load revealed no statistically significant difference among groups considering the type of luting agent (P = 0.075; F = 2,673), the application method (P = 0.772; F = 2,259), and the interaction between them (P = 0.297; F = 1,248). The characteristic strength did not show differences among groups (95% CI). The m, which indicates structural reliability, showed lower values for SN/P/U and SN/P, with a difference from other selected groups (95% CI). CONCLUSION Preheating of resin-based materials and ultrasound application did not affect the failure load of lithium disilicate glass-ceramic. Lower reliability was observed with supra-nano filled resin composite.
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Affiliation(s)
| | - Aloísio Oro Spazzin
- Graduate Program in Dentistry, School of Dentistry, Atitus Education, Passo Fundo, RS, Brazil
| | - Atais Bacchi
- Graduate Program in Dentistry, Paulo Picanço School of Dentistry (FACPP), Fortaleza, CE, Brazil
| | - Rodrigo Alessandretti
- Graduate Program in Dentistry, School of Dentistry, Atitus Education, Passo Fundo, RS, Brazil
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May MM, Machry RV, Fraga S, de Andrade GS, Bottino MA, Valandro LF, May LG. Resin cement coating reverts the machining damage on the flexural fatigue strength of lithium disilicate glass-ceramic. J Biomed Mater Res B Appl Biomater 2023; 111:971-980. [PMID: 36434818 DOI: 10.1002/jbm.b.35206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 10/31/2022] [Accepted: 11/15/2022] [Indexed: 11/27/2022]
Abstract
This study evaluated the effect of resin cement coating with high and low viscosities on the flexural fatigue strength of machined lithium disilicate glass-ceramic. Discs (IPS e.max CAD; Ivoclar Vivadent) were prepared and divided according to the surface condition (machining [M]-CEREC inLab; and polishing [P]-laboratory procedures), resin cement coating (with or without), and cement viscosity (high [H] and low [L]). The ceramic bonding surface was etched/primed by a one-step primer application followed by resin cement application (Variolink N base + high or low viscosity catalyst; Ivoclar Vivadent). Biaxial flexural fatigue strength was evaluated on a piston-on-three-ball set by the step-test method (n = 15) (initial stress: 60 MPa; incremental steps: 20 MPa; 10,000 cycles/step, at 20 Hz). Weibull statistics were used for fatigue data. Contact angle, topographic, and fractographic analysis were also performed. Machining produced statistically lower contact angle than polishing and a significant detrimental effect on the fatigue behavior (σ0 M = 247.2 [246.9-268.3]; σ0 P = 337.4 [297.8-382.4]). Machined groups followed by resin cement coating (σ0 MH = 297.9 [276.0-321.5]; σ0 Ml = 301.2 [277.1-327.4]) behaved similarly to the polished and coated groups (σ0 PH = 342.0 [308.9-378.5]; σ0 PL = 357.3 [324.7-393.1]), irrespective of the cement viscosity. Therefore, cement coating has able to revert the detrimental effects of the machining on the fatigue strength of lithium disilicate glass-ceramic. High and low viscosity cements behaved similarly in the improvement of CAD-CAM lithium disilicate fatigue strength.
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Affiliation(s)
- Michele Mirian May
- Post-Graduate Program in Dental Sciences, Prosthetic Dentistry Unit, Faculty of Odontology, Federal University of Santa Maria, Santa Maria, Brazil
| | - Renan Vaz Machry
- Post-Graduate Program in Dental Sciences, Prosthetic Dentistry Unit, Faculty of Odontology, Federal University of Santa Maria, Santa Maria, Brazil
| | - Sara Fraga
- Department of Conservative Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Marco Antonio Bottino
- Department of Dental Materials and Prosthodontics, São Paulo State University, São José dos Campos, Brazil
| | - Luiz Felipe Valandro
- Department of Restorative Dentistry, Federal University of Santa Maria, Santa Maria, Brazil
| | - Liliana Gressler May
- Department of Restorative Dentistry, Federal University of Santa Maria, Santa Maria, Brazil
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Dalla-Nora F, Guilardi LF, Zucuni CP, Valandro LF, Rippe MP. Adhesion to a Zirconia-reinforced Lithium Silicate Ceramic: Effects of Ceramic Surface Treatments and Resin Cements. Oper Dent 2022; 47:320-329. [PMID: 35604819 DOI: 10.2341/20-226-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/04/2021] [Indexed: 11/23/2022]
Abstract
OBJECTIVE This study had the objective to test the effect of ceramic surface treatments on the microshear bond strength (μSBS) of different resin cements to a zirconia-reinforced lithium silicate (ZLS). METHODS AND MATERIALS ZLS blocks were sectioned, embedded in acrylic resin, and then allocated into nine groups considering two study factors: "ceramic surface treatment" (HF - hydrofluoric acid; EP - self-etching primer; TBS - tribochemical silica coating) and "resin cements" (nMDP - without MDP monomer; MDP - with MDP monomer; SA - self-adhesive). Starch tubes (n=36) were placed on the treated ceramic surface and the cement was applied. Starch tubes were removed after 24 hours of storage, and the specimens were thermocycled (5,000×; 5°C-55°C). Next, the μSBS test was performed using the wire-loop technique, and topographic and failure analyses were performed. RESULTS The factors "ceramic surface treatment" and "resin cement" statistically influenced the μSBS results. Considering the surface treatment factor, the TBS produced statistically lower values when the MDP resin cement was applied, being only similar to the MDP plus EP group. For the resin cement factor, no difference was found for nMDP and SA groups, apart from the surface treatments. Failure analysis showed that the groups treated with EP had a greater number of pre-test failures. The surface treatments induced noteworthy topographic alterations when compared to control (no treatment). CONCLUSION The ZLS ceramic surface treatment with tribochemical silica coating associated with the MDP-containing resin cement resulted in lower bond strength values.
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Affiliation(s)
- F Dalla-Nora
- Fernanda Dalla-Nora, DDS, MSciD Post-Graduate Program in Oral Science (Prosthodontics Unit), Faculty of Dentistry, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil
| | - L F Guilardi
- Luís Felipe Guilardi, DDS, MSciD, PhD, professor, Division of Prosthodontics, Department of Restorative Dentistry, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul State, Brazil
| | - C P Zucuni
- Camilla Pauliski Zucuni, DDS, MSciD, PhD, Post-Graduate Program in Oral Science (Prosthodontics Unit), Faculty of Dentistry, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil
| | - L F Valandro
- Luiz Felipe Valandro, DDS, MSciD, PhD, associate professor, Division of Prosthodontics, Department of Restorative Dentistry, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul State, Brazil
| | - M P Rippe
- *Marília Pivetta Rippe, DDS, MSciD, PhD, adjunct professor, Division of Prosthodontics, Department of Restorative Dentistry, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul State, Brazil
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Guilardi LF, Werner A, Jager ND, Pereira GKR, Kleverlaan CJ, Rippe MP, Valandro LF. The influence of roughness on the resistance to impact of different CAD/CAM dental ceramics. Braz Dent J 2022; 32:54-65. [PMID: 35019019 DOI: 10.1590/0103-6440202103951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Accepted: 02/15/2021] [Indexed: 11/21/2022] Open
Abstract
This study aimed to investigate the effect of surface roughness (polished vs. CAD/CAM milling simulation) on impact strength of five dental ceramics for manufacturing CAD/CAM monolithic restorations. Specimens of five ceramics (FC- feldspathic glass-ceramic; PICN- polymer-infiltrated ceramic-network; ZLS- zirconia-reinforced lithium silicate glass-ceramic; LD- lithium disilicate glass-ceramic; YZ- yttria-stabilized tetragonal zirconia polycrystal ceramic) to be tested under impact (15×10×2mm3; n= 15) were divided into two groups, according to surface treatment: polishing (pol) and grinding (gri) as CAD/CAM milling simulation. Impact strength was tested using the Dynstat method. Roughness, topographic, fractographic and finite element analyses were performed. The impact strength data were analyzed by Weibull, and Pearson correlation was used to correlate roughness and impact strength data. The CAD/CAM milling simulation led to significantly (p<0.05) greater roughness (Ra and Rz) and statistically reduced the impact strength for PICN (polPICN= 4.59 to griPICN= 1.09; ±76% decrease), for LD (polLD= 17.69 to griLD= 10.09; ±43% decrease) and for YZ (polYZ= 74.99 to griYZ= 20.67; ±72% decrease) ceramics; and also promoted a more irregular topography with scratches and grooves. Fractographic and FEA analyses depicted the origin of failure at the higher stress concentration side during the impact test, where the pendulum impacted. The CAD/CAM milling simulation significantly decreased the impact strength of the evaluated ceramic materials.
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Affiliation(s)
- Luis Felipe Guilardi
- Federal University of Santa Maria, Faculty of Dentistry, Department of Restorative Dentistry, Santa Maria, RS, Brazil
| | - Arie Werner
- Federal University of Santa Maria, Faculty of Dentistry, Department of Restorative Dentistry, Santa Maria, RS, Brazil
| | - Niek de Jager
- Academic Centre for Dentistry Amsterdam - ACTA, Department of Dental Materials Science, Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, The Netherlands
| | - Gabriel Kalil Rocha Pereira
- Federal University of Santa Maria, Faculty of Dentistry, Department of Restorative Dentistry, Santa Maria, RS, Brazil
| | - Cornelis Johannes Kleverlaan
- Academic Centre for Dentistry Amsterdam - ACTA, Department of Dental Materials Science, Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, The Netherlands
| | - Marilia Pivetta Rippe
- Federal University of Santa Maria, Faculty of Dentistry, Department of Restorative Dentistry, Santa Maria, RS, Brazil
| | - Luiz Felipe Valandro
- Federal University of Santa Maria, Faculty of Dentistry, Department of Restorative Dentistry, Santa Maria, RS, Brazil
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Dalla-Nora F, Guilardi LF, Zucuni CP, Valandro LF, Rippe MP. Fatigue Behavior of Monolithic Zirconia-Reinforced Lithium Silicate Ceramic Restorations: Effects of Conditionings of the Intaglio Surface and the Resin Cements. Oper Dent 2021; 46:316-326. [PMID: 34251409 DOI: 10.2341/20-025-l] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/12/2020] [Indexed: 11/23/2022]
Abstract
OBJECTIVE This study assessed the effect of conditioning of the intaglio surface and resin cements on the fatigue behavior of zirconia-reinforced lithium silicate ceramic (ZLS) restorations cemented to a dentin analogue. METHODS ZLS ceramic (Ø=10 mm, thickness=1.5 mm) and dentin analogue (Ø=10 mm, thickness=2.0 mm) discs were produced and allocated according to the study factors, totaling nine study groups: ceramic surface treatment (three levels: hydrofluoric acid etching [HF]; self-etching ceramic primer [EP]; tribochemical silica coating [TBS]) and resin cement (three levels: 10-methacryloyloxydecyl dihydrogen phosphate [nMDP]; MDP-containing conventional resin cement [MDP]; self-adhesive resin cement [SA]). The ceramic bonding surfaces were treated and cemented on the dentin analogue, and all the specimens were aged for 5000 thermal cycles (5°C-55°C) prior to fatigue testing. The stepwise fatigue test (20 Hz frequency) started with a load of 400 N (5000 cycles) followed by steps of 500, 600, and up to 1800 N (step-size: 100 N) at a maximum of 10,000 cycles each step. The specimens were loaded until failure (crack), which was detected by light transillumination and visual inspection at the end of each step. The fatigue failure load and number of cycles for failure data were analyzed by the Kaplan-Meier (log-rank test; α=0.05). Topographic and fractographic analyses were also performed. RESULTS HF- (973.33-1206.67 N) and EP- (866.67-1066.67 N) treated specimens failed at statistically similar loads and higher than TBS (546.67-733.33 N), regardless of the cement used. All the fractographical inspections demonstrated failure as radial crack. CONCLUSION The HF and EP treatments promoted better mechanical fatigue behavior of the ceramic restoration, while tribochemical silica coating induced worse fatigue results and should be avoided for treating the ZLS surface prior to bonding.
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May MM, Fraga S, May LG. Effect of milling, fitting adjustments, and hydrofluoric acid etching on the strength and roughness of CAD-CAM glass-ceramics: A systematic review and meta-analysis. J Prosthet Dent 2021; 128:1190-1200. [PMID: 33865557 DOI: 10.1016/j.prosdent.2021.02.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 02/24/2021] [Accepted: 02/24/2021] [Indexed: 11/19/2022]
Abstract
STATEMENT OF PROBLEM Whether procedures performed before the cementation of computer-aided design and computer-aided manufacturing (CAD-CAM) glass-ceramic restorations, including milling, fitting adjustment, and hydrofluoric acid etching introduce defects on the ceramic surface that affect the mechanical and surface properties is unclear. PURPOSE A systematic review and meta-analysis were conducted to assess the effect of milling, fitting adjustments, and hydrofluoric acid etching (HF) on the flexural strength and roughness (Ra) of CAD-CAM glass-ceramics. MATERIAL AND METHODS Literature searches were performed up to June 2020 in the PubMed/MEDLINE, Web of Science, and Scopus databases, with no publication year or language limits. The focused question was "Do milling, fitting adjustments, and hydrofluoric acid etching affect the flexural strength and roughness of CAD-CAM glass-ceramics?" For the meta-analysis, flexural strength and Ra data on milling, fitting adjustment, and HF etching versus control (polishing) were analyzed globally. A subgroup analysis assessed the effect of etching parameters (HF concentration and time) on the flexural strength and roughness of CAD-CAM glass-ceramics with different microstructures. Comparisons were performed with random-effect models at 5% significance. RESULTS Fourteen studies from 2764 potentially relevant records were included in the qualitative syntheses, and 12 in the meta-analysis. Milling and fitting adjustments increased roughness and reduced the flexural strength of CAD-CAM glass-ceramics. The effect of HF etching was dependent on the glass-ceramic microstructure, HF concentration, and etching time. For feldspathic- and leucite-reinforced ceramics, HF 5% applied for between 30 and 120 seconds increased roughness without affecting flexural strength. For lithium disilicate glass-ceramics, HF concentrations greater than 4.9% used for 20 seconds or more reduced the strength without affecting the surface roughness. CONCLUSIONS The flexural strength of CAD-CAM glass-ceramic is reduced by grinding procedures such as milling and fitting adjustment. Ceramic microstructure, HF concentration, and etching time determined the effect of hydrofluoric acid etching on the flexural strength and surface roughness of glass-ceramic materials.
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Affiliation(s)
- Michele Mirian May
- Postgraduate student, Postgraduate Program in Dental Science, Prosthodontics Units, Federal University of Santa Maria (UFSM), Santa Maria, Brazil
| | - Sara Fraga
- Adjunct Professor, Department of Conservative Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil.
| | - Liliana Gressler May
- Associate Professor, Department of Restorative Dentistry, Federal University of Santa Maria (UFSM), Santa Maria, Brazil
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Skalskyi V, Makeev V, Stankevych O, Dubytskyi O. Acoustic properties of fracture of dental restorative materials and endocrown restorations under quasi-static loading. Dent Mater 2020; 36:617-625. [DOI: 10.1016/j.dental.2020.03.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 02/17/2020] [Accepted: 03/12/2020] [Indexed: 11/17/2022]
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LF G, P S, A W, de Jager N, GKR P, CJ K, MP R, LF V. Fatigue performance of distinct CAD/CAM dental ceramics. J Mech Behav Biomed Mater 2020; 103:103540. [DOI: 10.1016/j.jmbbm.2019.103540] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 11/13/2019] [Accepted: 11/14/2019] [Indexed: 02/02/2023]
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Veríssimo AH, Moura DMD, Tribst JPM, Araújo AMMD, Leite FPP, Souza RODAE. Effect of hydrofluoric acid concentration and etching time on resin-bond strength to different glass ceramics. Braz Oral Res 2019; 33:e041. [PMID: 31508723 DOI: 10.1590/1807-3107bor-2019.vol33.0041] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Accepted: 04/10/2019] [Indexed: 11/21/2022] Open
Abstract
The objective of this study was to evaluate the effect of the hydrofluoridric acid (HF) concentration and time of acid conditioning on bond strength of three glass ceramics to a resin cement. Thus, fifty blocks (10 mm x 5 mm x 2 mm) of each ceramic (LDCAD: IPS e.max CAD; LCAD: IPS Empress CAD and LDHP: IPS e.max Press) were made and embedded in acrylic resin. The surfaces were polished with sandpaper (#600, 800, 1000, and 1200 grits) and blocks were randomly divided into 15 groups (n = 10) according to the following factors: Concentration of HF (10% and 5%), conditioning time (20 s and 60 s) and ceramic (LDCAD, LDHP, and L). After conditioning, silane (Prosil / FGM) was applied and after 2 min, cylinders (Ø = 2 mm; h = 2 mm) of dual resin cement (AllCem / FGM) were made in the center of each block using a Teflon strip as matrix and light cured for 40 s (1,200 mW/cm2). Then, the samples were thermocycled (10,000 cycles, 5/55°C, 30s) and submitted to the shear bond test (50 KgF, 0.5 mm/min). The data (MPa) were analyzed with 3-way ANOVA and Tukey's test (5%). Failure analysis was performed using a stereomicroscope (20x) and a scanning electron microscope (SEM). ANOVA revealed that the "concentration" factor (p = 0.01) and the interaction "acid concentration X ceramic" (p = 0.009) had a significant effect, however, the "ceramic" (p = 0.897) and "conditioning time" (p = 0.260) factors did not influence the results. The LDHP10%60s (10.98 MPa)aA* group presented significantly higher bond strength than LDHP10%20s (6.57 MPa)bA, LCAD5%20s (6,90 ±3,5)aB and LDHP5%60s (5.66 ± 2,9MPa)aA* groups (Tukey). Failure analysis revealed that 100% of specimens had mixed failure. In conclusion, etching with 5% HF for 20 seconds is recommended for lithium disilicate and leucite-reinforced CAD/CAM ceramics. However, for pressed lithium disilicate ceramic, 10% HF for 60 s showed significantly higher bond strength to resin cement.
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Affiliation(s)
- Aretha Heitor Veríssimo
- Department of Dentistry, Universidade Federal do Rio Grande do Norte - UFRN, Natal, RN, Brazil
| | | | - João Paulo Mendes Tribst
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, Universidade Estadual Paulista - Unesp, São José dos Campos, SP, Brazil
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How does the piston material affect the in vitro mechanical behavior of dental ceramics? J Prosthet Dent 2018; 120:747-754. [DOI: 10.1016/j.prosdent.2018.01.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 01/23/2018] [Accepted: 01/24/2018] [Indexed: 11/23/2022]
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12
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How oral environment simulation affects ceramic failure behavior. J Prosthet Dent 2018; 119:812-818. [DOI: 10.1016/j.prosdent.2017.05.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 05/23/2017] [Accepted: 05/23/2017] [Indexed: 11/20/2022]
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Reliability and mode of failure of bonded monolithic and multilayer ceramics. Dent Mater 2017; 33:191-197. [DOI: 10.1016/j.dental.2016.11.014] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 11/24/2016] [Accepted: 11/29/2016] [Indexed: 11/21/2022]
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Basso G, Moraes R, Borba M, Duan Y, Griggs J, Bona AD. Reliability and failure behavior of CAD-on fixed partial dentures. Dent Mater 2016; 32:624-30. [DOI: 10.1016/j.dental.2016.01.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 12/07/2015] [Accepted: 01/29/2016] [Indexed: 10/22/2022]
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EREIFEJ NS, OWEIS YG, ALTARAWNEH SK. Fracture of fiber-reinforced composites analyzed via acoustic emission. Dent Mater J 2015; 34:417-24. [DOI: 10.4012/dmj.2014-325] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Nadia S EREIFEJ
- Department of Prosthodontics, Faculty of Dentistry, University of Jordan
| | - Yara G OWEIS
- Department of Conservative Dentistry, Faculty of Dentistry, University of Jordan
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Steinhauser HC, Turssi CP, Franca FMG, Amaral FLBD, Basting RT. Micro-shear bond strength and surface micromorphology of a feldspathic ceramic treated with different cleaning methods after hydrofluoric acid etching. J Appl Oral Sci 2014; 22:85-90. [PMID: 24676577 PMCID: PMC3956398 DOI: 10.1590/1678-775720130339] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2013] [Accepted: 09/20/2013] [Indexed: 11/30/2022] Open
Abstract
Objective The aim of this study was to evaluate the effect of feldspathic ceramic surface
cleaning on micro-shear bond strength and ceramic surface morphology. Material and Methods Forty discs of feldspathic ceramic were prepared and etched with 10% hydrofluoric
acid for 2 minutes. The discs were randomly distributed into five groups (n=8): C:
no treatment, S: water spray + air drying for 1 minute, US: immersion in
ultrasonic bath for 5 minutes, F: etching with 37% phosphoric acid for 1 minute,
followed by 1-minute rinse, F+US: etching with 37% phosphoric acid for 1 minute,
1-minute rinse and ultrasonic bath for 5 minutes. Composite cylinders were bonded
to the discs following application of silane and hydrophobic adhesive for
micro-shear bond strength testing in a universal testing machine at 0.5 mm/min
crosshead speed until failure. Stereomicroscopy was used to classify failure type.
Surface micromorphology of each treatment type was evaluated by scanning electron
microscopy at 500 and 2,500 times magnification. Results One-way ANOVA test showed no significant difference between treatments (p=0.3197)
and the most common failure types were cohesive resin cohesion followed by
adhesive failure. Micro-shear bond strength of the feldspathic ceramic substrate
to the adhesive system was not influenced by the different surface cleaning
techniques. Absence of or less residue was observed after etching with
hydrofluoric acid for the groups US and F+US. Conclusions Combining ceramic cleaning techniques with hydrofluoric acid etching did not
affect ceramic bond strength, whereas, when cleaning was associated with
ultrasound, less residue was observed.
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Affiliation(s)
| | - Cecilia Pedroso Turssi
- School of Dentistry, Sao Leopoldo Mandic Dental Research Institute, Campinas, SP, Brazil
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