الفهرس 
The effect of platform switching implants and different abutment materials on the stress distribution of implant supported zirconia restoration
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Abstract
Successful long-term results of dental implants have led to an increase in their usage in many clinical situations. Since the introduction of osseointegrated implants for the rehabilitation of edentulous patients,tremendous awareness and subsequent demand have arisen in the field, where implant supported fixed prosthesis became widely accepted as an alternative to conventional prosthesis. However, some clinical studies have reported variable rates of failure. Biomechanical factors and stress distribution around implant supported restorations are the prime factors leading to failure of implants. The relationship between load factors and implant failure cannot be ignored any longer because of the high incidence of fractures of components, marginal bone loss, and loss of Osseointegration in situations of compromised prosthetic reconstruction and/or extreme load conditions.The current study evaluated the effect of platform switching implants and different abutment materials (Titanium and zirconia) on the stress distribution around Implant supported monolithic full anatomical zirconia crowns. Stress analysis was measured using mechanical loading test together with strain gauge. The following materials were used in the current study:Implant direct dental implant fixtures