This study aimed to establish a three-dimensional (3D) finite element model for variation of loading direction to identify its effects on the stress distribution generated around an implant and surrounding jawbone under biomechanical consideration. Twenty one 3D finite element cases containing the endosseous titanium implant in type II bone under three different loads i.e., 50, 100, and 200 N, with various directions from 0 to 30 degrees to the vertical axis with the increasing rate of 5 degrees were applied to analyze the stress distribution pattern in the implant and surrounding bone. For data analysis, the von Mises criterion was used. The results revealed that the oblique loading would significantly induce higher interfacial stresses compared to the vertical loading. The highest on Mises stress was observed in the implant for all the cases. An increasement of the angle of force both increased the maximum stress and worsened stress distribution patterns in the implant and supporting bone. The results suggest that under oblique load 30 the maximum von Mises stresses in the implant, cortical, and cancellous bones increase by 236%, 322%, and 22%, respectively. The findings of this study may have implications not only for understanding the stress distribution in implant and bone under various loading angles but also for determining an optimum implant for specific application in dentistry.

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