Influence of Implant Shape on Stress Distribution in the Maxilla and Mandible is a review article to analyse the stress distribution among the various shapes of implants and the bone response to the stress. The implant shapes are cylindrical, conical, screw. In cylindrical implant higher stress values are obtained under pure contact. Significant bone loss occurs when compact bone overloading occurs. The conical implant with additional retention gives less stress in axial loading at the neck of implants. The stepped implant has highest stress in the step and better structural stability whereas screw shape has greatest retention and initial stability .The lower maximum stress level in the stepped implant model is due to a low stiffness of the stepped implant. Screw implants provide greatest retention and initial stability and increases surface contact. Thus it shows that stress distribution occurs in different levels in different shapes of implant.

KEYWORDS: Stress distribution, implant shape, bone, Pontic, retention.