Biomechanical evaluation of the insertion torque resistance of different types of implants and internal grip drivers and grades 4 and 5 titanium alloys

• Grant number: 12/18589-8
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: March 01, 2013
• End date: December 31, 2013
• Field of knowledge: Health Sciences - Dentistry - Oral and Maxillofacial Surgery
• Principal Investigator: Hugo Nary Filho
• Grantee: Roberta Peroto Abiati
• Host Institution: Centro de Ciências da Saúde. Universidade do Sagrado Coração (USC). Bauru , SP, Brazil

Abstract

Primary stability is the main objective of the newest installation techniques for endosseous implants. For this reason, fixtures must be inserted using high torque values, which demand a great resistance in the interface with internal grip devices. Nowadays there are different types of connection systems with different drivers and the possibility of using titanium alloys with different grades of resistance and biocompatibility. The present work will evaluate the resistance limit of different systems for the identification of possible risk situations. Four groups containing 10 kits will be devided into Group 1) fixtures with external hexagon connection and titanium alloy grade 4; Group 2) external hexagon connection implants and titanium alloy grade 5; Group 3) internal hexagon connection implants and titanium alloy grade 4, and Group 4) internal hexagon connection and titanium alloy grade 5. Disposable insertion drivers will be used for each implant, and the kits will undergo torsion tests following ASTM F543:2007 indications. The results will be statistically treated under ANOVA and Tukey test for the determination of the influence of the studied variables: type of titanium alloy and connection. (AU)