Different fabrication techniques of implant-supported prostheses

microhardness and fracture strength





Dental implants, Prosthodontics, Computer-aided design, Flexural strength.


Aim: This study evaluated the mechanical behavior of implant-supported crowns obtained by different fabrication technique after thermomechanical cycling. Methods: Thirty-two external hexagon dental implants were divided into four groups (n=10): CC – conventional casting with torch; EI – electromagnetic induction casting; PL – plasma casting; and CAD-CAM – milling through computer-aided design and computer-aided manufacturing. Vickers microhardness of the specimens were made before and after the thermomechanical cycling, and then subjected to fracture load. Fracture pattern was evaluated. Results: No significant difference was observed comparing the microhardness before and after thermomechanical cycling. CAD-CAM group presented significant lower microhardness than the other groups. No significant statistical difference was showed on fracture load between the groups. The CAD-CAM and PL presented lower number of failure by plastic deformation. Conclusion: The manufacturing techniques affected the mechanical behavior and the failure pattern of implant-supported crowns tested.


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Author Biographies

Silas Monteiro Borges, University of Ribeirão Preto

School of Dentistry, University of Ribeirão Preto, Ribeirão Preto, SP, Brazil.

Stephanie Francoi Poole, University of Ribeirão Preto

School of Dentistry, University of Ribeirão Preto, Ribeirão Preto, SP, Brazil.

Izabela Cristina Maurício Moris, University of Ribeirão Preto

School of Dentistry, University of Ribeirão Preto, Ribeirão Preto, SP, Brazil.

Aloísio Oro Spazzin, Meridional Faculty (IMED)

School of Dentistry, Meridional Faculty (IMED), Passo Fundo, RS, Brazil.

Adriana Cláudia Lapria Faria, University of São Paulo

Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo, Ribeirão Preto, SP, Brazil.

Erica Alves Gomes, University of Ribeirão Preto

School of Dentistry, University of Ribeirão Preto, Ribeirão Preto, SP, Brazil.


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How to Cite

Borges SM, Poole SF, Moris ICM, Spazzin AO, Faria ACL, Gomes EA. Different fabrication techniques of implant-supported prostheses: microhardness and fracture strength. Braz. J. Oral Sci. [Internet]. 2019Nov.12 [cited 2020Oct.31];180:e191573. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8657254

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