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.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.11607/jomi.2506 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Morphological and biomechanical characterization of long bones and peri-implant bone repair in type 2 diabetic rats treated with resveratrol.
Sci Rep
February 2024
Department of Basic Science, Araçatuba School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil.
Type 2 diabetes interferes with bone remodeling mechanisms, requiring studies to reverse this damage, and resveratrol is a polyphenol with rich properties. This study aimed to characterize the long bone morphology and peri-implant biomechanics of normoglycemic and type 2 diabetic animals treated with resveratrol. Thirty-two male Wistar rats were used and divided into normoglycemic and diabetic with or without treatment.
View Article and Find Full Text PDFA systematic review on removal of osseointegrated implants: un update.
BMC Oral Health
October 2023
Unit of Prosthodontics, Department of Innovative Technologies in Medicine and Dentistry, University "G. d'Annunzio" of Chieti- Pescara, 66100, Chieti, Italy.
Background: Today dental implants represent an effective therapy in case of partial or total edentulism, with an excellent success rate. Despite the results obtained, there may be biological or mechanical complications during the therapy, which lead to the loss of the implant. This systematic review aims to evaluate the current state of the art in the literature on techniques used for the removal of dental implants.
View Article and Find Full Text PDFPrecision of polyether ether ketone (PEEK) or cobalt-chrome implant bar fit to implants after mechanical cycling.
Acta Odontol Latinoam
August 2023
Faculdade São Leopoldo Mandic, Programa de Pós-Graduação, Campinas, Brasil.
Unlabelled: Based on its mechanical properties, PEEK (polyether-ether-ketone) might be useful in restorative procedures. In oral rehabilitation, its viability has been studied mainly for prostheses and dental implants.
Aim: The aim of this study was to evaluate the fit accuracy of dental implant bars made of either PEEK or cobalt-chrome submitted to cycling mechanics.
Anaerobic adhesives effect on counter-torque of abutment screws on implants with external hexagon and conical connections: An in vitro study.
Clin Implant Dent Relat Res
June 2023
Department of Restorative Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.
Background: Abutment screw loosening is a common complication of implant supported prostheses, especially for single crowns. In engineering, anaerobic adhesives (AA) are used to provide chemical locking between screw surfaces, but their application in implantology remains unclear.
Purpose: The purpose of this article is to evaluate, in vitro, the effect of AA on counter-torque of abutment screws for cemented prosthesis on dental implants with external hexagon connection (EHC) and conical connection (CC).
Impact of a modified implant macrogeometry on biomechanical parameters and bone-related markers in rats.
Braz Oral Res
May 2023
Universidade Paulista, School of Dentistry, Dental Research Division, São Paulo, SP, Brazil.
This study investigated the impact of a modified implant macrogeometry on peri-implant healing and its effect on bone-related molecules in rats. Eighteen rats received one implant in each tibia: the control group received implants with conventional macrogeometry and the test group received implants with modified macrogeometry. After 30 days, the implants were removed for biomechanical analysis and the bone tissue around them was collected for quantifying gene expression of OPN, Runx2, β-catenin, BMP-2, Dkk1, and RANKL/OPG.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!