Resin composite repair for implant-supported crowns.
This study evaluated the reliability of implant-supported crowns repaired with resin composites. Fifty-four titanium abutments were divided in three groups (n = 18 each) to support resin nanoceramic molar crowns, as follows: (LU) (Lava Ultimate, 3M ESPE); LU repaired with either a direct or an indirect resin composite. Samples were subjected to mouth-motion accelerated-life testing in water (n = 18). Cumulative damage with a use stress of 300 N was used to plot Weibull curves for group comparison. Reliability was calculated for a mission of 100,000 cycles at 400 N load. Beta values were 0.83 for LU, 0.31 and 0.27 for LU repaired with Filtek and Ceramage, respectively. Weibull modulus for LU was 9.5 and η = 1047 N, m = 6.85, and η = 1002 N for LU repaired with Ceramage, and m = 4.65 and η = 766 N for LU repaired with Filtek (p < 0.10 between LU and LU repaired with Filtek). Reliability at 400 N was 100% for both LU and LU repaired with Ceramage which were significantly higher than LU Filtek repair (32%). LU restored crowns failed cohesively. Fractures were confined within the restored material, and detailed fractography is presented. The performance of resin nanoceramic material repaired with an indirect composite was maintained after accelerated-life testing compared to unrepaired controls. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 1481-1489, 2017.
Department of Prosthodontics, University of São Paulo, Bauru College of Dentistry, Bauru, SP, Brazil.
Estevam A
EA
Bonfante
Department of Operative Dentistry and Prosthodontics, Tufts University School of Dental Medicine, Boston, Massachusetts.
Marcelo
M
Suzuki
Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, New York, 10010.
Ronaldo
R
Hirata
Department of Prosthodontics, University of São Paulo, Bauru College of Dentistry, Bauru, SP, Brazil.
Gerson
G
Bonfante
Department of Prosthodontics, University of São Paulo, Bauru College of Dentistry, Bauru, SP, Brazil.|Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, New York, 10010.
Vinicius P
VP
Fardin
Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, New York, 10010.|Director for Research, Department of Periodontology and Implant Dentistry, New York University College of Dentistry, New York, New York.|Affiliated Faculty, Division of Engineering, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates.
Paulo G
PG
Coelho
D003188:Composite Resins / Q000737:chemistry*; D003442:Crowns; D015921:Dental Implants; D006801:Humans; D008422:Materials Testing; D013314:Stress, Mechanical
D003188:Composite Resins; D015921:Dental Implants
crown; dental implant; fatigue; fractography; repair; resin composites