Stress analysis and flexural strength of zirconia implants after mechanical fatigue

• Grant number: 11/08395-9
• Support Opportunities: Regular Research Grants
• Duration: December 01, 2011 - November 30, 2013
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Heitor Panzeri
• Grantee: Heitor Panzeri
• Host Institution: Faculdade de Odontologia de Ribeirão Preto (FORP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil

Abstract

This study will evaluate the transmission of tension and flexural strength of the implant body type only the basis of zirconium and titanium, after chewing simulation. The verification of the stresses generated around the implants will be held initially by means of photoelastic analysis. After obtaining the zirconium implants and selection of metallic implants, they will be included in acrylic resin in a total of 24 implants, 24 titanium and zirconium, in an inclination of 130 °. Then, the implants will be randomly separated into groups (n = 8) according to the type of treatment that will be subjected to control titanium implants (Ti), titanium implants subjected to mechanical stress (TiM), titanium implants subjected to fatigue thermomechanical, control implants of zirconium (Zr), zirconium implants subjected to mechanical stress (ZRM), zirconium implants subjected to thermomechanical fatigue (ZrTM). For the machine we have the mechanical stress application programming with an average load of approximately 120 N force on each specimen, with a frequency of 102 cycles per minute (1.8 Hz) for 1,200,000 cycles. After the fatigue test chewing with or without thermocycling, the groups will be tested on flexural strain, and these values are compared to the values obtained from control groups of each material (Ti / Zr). After obtaining the results, they will be subjected to statistical analysis according to the normality test sample. (AU)