Biomechanical behavior of CAD/CAM cobalt-chromium and zirconia full-arch fixed prostheses

Thais Barbin; Leticia Del Rio Silva; Daniele Valente Veloso; Guilherme Almeida Borges; Anna Gabriella Camacho Presotto; Valentim Adelino Ricardo Barao; Francisco Carlos Groppo; Marcelo Ferraz Mesquita

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저자정보: Thais Barbin (Piracicaba Dental School University of Campinas Piracicaba Brazil) Leticia Del Rio Silva (Piracicaba Dental School University of Campinas Piracicaba Brazil) Daniele Valente Veloso (Piracicaba Dental School University of Campinas Piracicaba Brazil) Guilherme Almeida Borges (Piracicaba Dental School University of Campinas Piracicaba Brazil) Anna Gabriella Camacho Presotto (Piracicaba Dental School University of Campinas Piracicaba Brazil) Valentim Adelino Ricardo Barao (Piracicaba Dental School University of Campinas Piracicaba Brazil) Francisco Carlos Groppo (Piracicaba Dental School University of Campinas Piracicaba Brazil) Marcelo Ferraz Mesquita (Piracicaba Dental School University of Campinas Piracicaba Brazil)

저널정보: 대한치과보철학회 The Journal of Advanced of Prosthodontics The Journal of Advanced of Prosthodontics 제12권 제6호

발행연도: 2020.1

수록면: 329 - 337 (9page)

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PURPOSE. To verify the influence of computer-aided design/computer-aided manufacturing (CAD/CAM) implantsupported prostheses manufactured with cobalt-chromium (Co-Cr) and zirconia (Zr), and whether ceramic application, spark erosion, and simulation of masticatory cycles modify biomechanical parameters (marginal fit, screw-loosening torque, and strain) on the implant-supported system. MATERIALS AND METHODS. Ten full-arch fixed frameworks were manufactured by a CAD/CAM milling system with Co-Cr and Zr (n=5/group). The marginal fit between the abutment and frameworks was measured as stated by single-screw test. Screw-loosening torque evaluated screw stability, and strain analysis was explored on the implant-supported system. All analyses were performed at 3 distinct times: after framework manufacturing; after ceramic application in both materials’ frameworks; and after the spark erosion in Co-Cr frameworks. Afterward, stability analysis was re-evaluated after 106 mechanical cycles (2 Hz/150-N) for both materials. Statistical analyses were performed by Kruskal-Wallis and Dunn tests (α=.05). RESULTS. No difference between the two materials was found for marginal fit, screwloosening torque, and strain after framework manufacturing (P>.05). Ceramic application did not affect the variables (P>.05). Spark erosion optimized marginal fit and strain medians for Co-Cr frameworks (P<.05). Screwloosening torque was significantly reduced by masticatory simulation (P<.05) regardless of the framework materials. CONCLUSION. Co-Cr and Zr frameworks presented similar biomechanical behavior. Ceramic application had no effect on the biomechanical behavior of either material. Spark erosion was an effective technique to improve Co-Cr biomechanical behavior on the implant-supported system. Screw-loosening torque was reduced for both materials after masticatory simulation.

#Computer-aided design/computer-aided manufacturing (CAD/CAM) #Dental marginal adaptation #Dental stress analysis #Implant-supported dental prostheses #Spark erosion

참고문헌 (38)

참고문헌 신청

Papaspyridakos P / 2019 / Double full-arch fixed implant-supported prostheses : Outcomes and complications after a mean follow-up of 5 years / J Prosthodont 28:387~397

Rojas Vizcaya F / 2018 / Retrospective 2-to 7-year follow-up study of 20 double full-arch implant-supported monolithic zirconia fixed prostheses : measurements and recommendations for optimal design / J Prosthodont 27:501~508

Jokstad A / 2015 / New 3D technologies applied to assess the long-term clinical effects of misfit of the full jaw fixed prosthesis on dental implants / Clin Oral Implants Res 26:1129~1134

de Torres EM / 2007 / The effect of commercially pure titanium and alternative dental alloys on the marginal fit of one-piece cast implant frameworks / J Dent 35:800~805

Ciocca L / 2019 / Manufacturing of metal frameworks for full-arch dental restoration on implants : A comparison between milling and a novel hybrid technology / J Prosthodont 28:556~563

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