Stress distribution in the peri-implant area of pure titanium and titanium-zirconium small implants

Keywords: Dental implants, Dental stress analysis, Stress, mechanical.

Abstract

Aim: In dental implant treatment, there is a demand for mechanically stronger implants. Despite the existence of several studies showing the clinical success of narrow diameter implants, most of them are based on pure titanium (cpTi) alloys. There is a few clinical evidences of the success rate of titanium-zirconium (TiZr) narrow diameter implants. The aim of this study was to evaluate the stress distribution in the peri-implant area of narrow diameter cpTi and TiZr implants under axial and oblique loads. Methods: Photoelastic models were produced using epoxy resin (PL2, Vishay Precision Group) from a master model. The implants (cpTi and TiZr; Straumann AG) had 3.3 mm in diameter and 12 mm in height. Loads of 100 N and 200 N were applied to the abutment at angles of 0° (axial), 10°, 20°, and 30° (oblique). A circular polariscope (Eikonal) was used under dark field white-light configuration. The isochromatic fringes were analyzed in the peri-implant region in 5 areas, using ASTM table with isochromatic fringes; cervical-mesial, cervical-distal, mid-mesial, mid-distal and apical. Results: In general, under axial and oblique loads, the stress in the TiZr implant was lower than in the cpTi implant. The load of 200 N produced the highest stress values in cpTi and TiZr implants. In both implants and loads, the fringes were located more in apical area at all angles evaluated. Conclusion: It can be concluded that for small implants, the load inclination and intensity change the pattern of stress distribution and the cpTi implant exhibited the highest peri-implant stress.

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Author Biographies

Tatiana de Andrade Sabino, University of Taubaté
Department of Prosthodontics, School of Dentistry - University of Taubaté, Taubaté, Brazil.
Laís Regiane da Silva-Concílio, University of Taubaté
Department of Prosthodontics, School of Dentistry - University of Taubaté, Taubaté, Brazil.
Ana Christina Elias Claro Neves, University of Taubaté
Department of Prosthodontics, School of Dentistry - University of Taubaté, Taubaté, Brazil.
Ana Paula Rosifini Alves Claro, São Paulo State University
Department of Materials and Technology, School of Engineering of Guaratinguetá, São Paulo State University, Guaratinguetá, Brazil.
Marina Amaral, School of Dentistry, University of Taubaté
Department of Prosthodontics, School of Dentistry, University of Taubaté, Taubaté, Brazil.
Rafael Pino Vitti, University of Taubaté
Department of Prosthodontics, School of Dentistry, University of Taubaté, Taubaté, Brazil.
Cristiane Aparecida de Assis Claro, University of Taubaté
Department of Prosthodontics, School of Dentistry, University of Taubaté, Taubaté, Brazil.

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Published
2019-11-12
How to Cite
Sabino, T. de A., Silva-Concílio, L. R. da, Neves, A. C. E. C., Claro, A. P. R. A., Amaral, M., Vitti, R. P., & Claro, C. A. de A. (2019). Stress distribution in the peri-implant area of pure titanium and titanium-zirconium small implants. Brazilian Journal of Oral Sciences, 18, e191505. https://doi.org/10.20396/bjos.v18i0.8657252