Effect of Abutment Design Parameter on Mechanical Properties for Dental Implant System

Abutments, as the intermediate connection between implant and crown vary on external characters decided by design parameters in order to suit for multiple clinical cases with the development of prosthodontics. The various angle, groove height (GH) and diameter of abutment brought different magnitude of stress to the dental implant system. Excessive stress concentration lead to fatigue fracture failure. Thus, in this study, parametric design and Finite Element Analysis (FEA) were combined to understand the effects of angled-abutment GH and diameter on the mechanical properties of the implant system. 30 models of abutment with varying angles (15 degrees and 25 degrees), diameters (4, 5 and 6mm) and GH (1, 2, 3, 4 and 5mm) were simulated and the values of Mises the equivalent stresses were analyzed by two-way ANOVA. The results demonstrated that the three design parameters had no influence on the area where stress concentration occurred and the diameter had no effect on the maximum stress while the GH had a significant influence (P<0.05).