Hesham A. Hegazy, Said M. Abd Allah And Attiah A. El-Gendy,

ABSTRACT
Objective: The Aim Of The Study Is To Compare Strain Distribution In Peri-implant Region Using Different Implant Platform Switching (an In-vitro Study).

Materials and Methods: Thirty Implant Fixtures Of The Same Diameters (6mm) And Lengths (10 Mm) And Thirty Abutments Of Different Diameters (6, 4.5, 3.5 Mm) Were Used And Connected To Each Other To Make Three Study Groups, Group (A) Ten Samples Of Matched Platform Implants With Abutment Diameter 6 Mm, Group (B) Ten Samples Of Platform Switching Implants With Abutment Diameter 4.5 Mm And Group (C) Ten Samples Of Platform Switching Implants With Abutment Diameter 3.5 Mm. All Samples Were Embedded In Epoxy Resin Blocks. Ascending Axial And Non-axial Loads From 0-200 N Were Applied To The Implants While Strain Gauges Were Connected To The Strain Meter To Record The Microstrains.

Results: In Group (A) The Microstrain Values Were The Highest Values While In The Other Two Groups (B) And (C) The Microstrain Values Were Decreasing With Increasing The Platform Switching Either Under Axial Or Non-axial Type Of Loading. Conclusion: Dental Implants With Platform Switched Implant-abutment Connection Transmit Less Stresses To Peri-implant Region Compared With Regular One Which Means More Bone Preservation Around Dental Implants And Increasing The Platform Switching Leads To Decreasing The Stresses Transmitted To The Surrounding Structures.