Analysis of Stress and Fracture Strength of Zirconia Implants after Cyclic Loading

Author(s)

Cruvinel, Diogo Rodrigues ^[1] ; Silveira, Renata Espindola ^[1] ; Galo, Rodrigo ^[2] ; Alandia-Roman, Carla Cecilia ^[1] ; Panzeri Pires-de-Souza, Fernanda de Carvalho ^[1] ; Panzeri, Heitor ^[1]

Affiliation

^[1] Univ Sao Paulo, Dept Mat Odontol & Protese, Fac Odontol Ribeirao Preto, BR-14040904 Ribeirao Preto, SP - Brazil

^[2] Univ Fed Vales Jequitinhonha & Mucuri, Dept Odontol, BR-39100000 Diamantina, MG - Brazil

• Document type: Journal article
• Source: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 18, n. 5, p. 1082-1088, SEP-OCT 2015.
• Web of Science Citations: 2

Abstract

The aim of this study was to manufacture a new zirconia implant (Y-TZP) and to evaluate the fracture strength and stresses generated after cyclic loading compared to titanium implants. Thirty-three zirconia and titanium implants were fabricated. The stress generated around the implants was observed by photoelastic analysis. The implants were then separated into groups (n = 10): Control (no treatment), mechanical fatigue and thermomechanical fatigue. All groups were submitted to a single cantilever flexure test to measure the material fracture strength. The results (2-way ANOVA, Bonfenoni test, p <.05) showed no statistically significant difference in the stresses generated between the zirconia and titanium implants. Titanium implants showed higher fracture strength than the zirconia implants, a property that was not altered by fatigue applied. It was concluded that stress distribution was similar for Zr and Ti and mechanical and thermomechanical fatigue had no influence on the fracture strength of the implants tested. (AU)

• FAPESP's process: 10/12072-8 - Stress analysis and flexural strength of zirconia implants after mechanical cycling
• Grantee: Diogo Rodrigues Cruvinel
• Support Opportunities: Scholarships in Brazil - Doctorate