Distribution of Peri-implant Stresses with a Countertorque Device

Autor(es)

Sendyk, Claudio Luiz ^[1] ; Lopez, Thais Torralbo ^[2] ; de Araujo, Cleudmar Amaral ^[3] ; Sendyk, Wilson Roberto ^[4] ; Goncalvez, Valdir Ferreira ^[5]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Dent, Dept Prosthodont, Sao Paulo - Brazil

^[2] Univ Sao Paulo, Sch Dent, Sao Paulo - Brazil

^[3] Univ Fed Uberlandia, Sch Mech Engn, BR-38400 Uberlandia, MG - Brazil

^[4] Univ Santo Amaro, Sch Dent, Dept Periodontol & Implant Dent, Sao Paulo - Brazil

^[5] Univ Santo Amaro, Sch Dent, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF ORAL & MAXILLOFACIAL IMPLANTS; v. 28, n. 2, p. E98-E105, MAR-APR 2013.
• Citações Web of Science: 0

Resumo

Purpose: To verify the effectiveness of a countertorque device in dental implants in redistributing stress to the bone-implant interface during tightening of the abutment screw. Materials and Methods: Two prismatic photoelastic samples containing implants were made, one with a 3.75-mm-diameter implant and the other with a 5.0-mm-diameter implant (both implants had an external-hexagon interface) and the respective abutments were attached (CeraOne). The samples were placed in a support and submitted to torques of 10, 20, 32, and 45 Ncm with an electronic torque meter. The torque application was repeated 10 times on each sample (n = 10) with and without a countertorque device. Photoelastic patterns were detected; thus, a photographic register of each test was selected. The fringe patterns were analyzed at discrete points near the implants' external arch. Results: In both implants analyzed, a stress gradient reduction was observed through the implant with the countertorque device. Conclusions: The countertorque device used in this study proved to be effective in reducing the stresses generated in the peri-implant bone tissue during torque application. (AU)

• Processo FAPESP: 00/12921-3 - Análise fotoelástica de distribuição de cargas ao redor de implantes osseointegrados paralelos e angulados
• Beneficiário: Cláudio Luiz Sendyk
• Modalidade de apoio: Auxílio à Pesquisa - Regular