Stress distribution around short implants with different frictional joint designs: a photoelastic colorimetric analysis / Distribuição de tensão em torno de implantes curtos com diferentes designs de fricção: uma análise colorimétrica

Abstract

Aim: To compare, biomechanically, two types of short implants with different frictional implant/abutment joint designs. Methods: Two groups (n = 10) were divided in straight platform (DSP, 5 x 5.5 mm) and angled platform (30°) (Kopp, 5 x 6.0 mm). The loads applied axially were 100 N, 200 N and 400 N. A photoelastic colorimetric analysis around the implants was performed, based on the magenta fringes, measured in pixels. The data were analyzed by the One-Way ANOVA with repeated measures, Tukey and Mann-Whitney U tests (p < 0.05). Results: The short implants demonstrated similar biomechanical behavior, but statistical difference occurred in the group Kopp, under the axial load of 400 N (p < 0.05). Conclusion: The implant design showed influence on the stress distribution around the locking taper short dental implants. In both groups, the area of greatest stress distribution was at the apical region.