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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Distribution of Peri-implant Stresses with a Countertorque Device

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Author(s):
Sendyk, Claudio Luiz [1] ; Lopez, Thais Torralbo [2] ; de Araujo, Cleudmar Amaral [3] ; Sendyk, Wilson Roberto [4] ; Goncalvez, Valdir Ferreira [5]
Total Authors: 5
Affiliation:
[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
Total Affiliations: 5
Document type: Journal article
Source: INTERNATIONAL JOURNAL OF ORAL & MAXILLOFACIAL IMPLANTS; v. 28, n. 2, p. E98-E105, MAR-APR 2013.
Web of Science Citations: 0
Abstract

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)