EDJ

SCREW LOOSENING PROCESS OF RETIGHTENED ABUTMENT SCREW IN STANDARD IMPLANTS AFTER EXPOSURE TO CYCLIC LOADING

Eman Mohamed Nasr, Attiah Ali Algendy And Tamer Mohamed Nasr Mostafa,

ABSTRACT

Purpose: The Purpose Of This Study Was To Evaluate The Effect Of Dynamic Cyclic Loading On Screw Loosening Of Retightened Abutment Screw In Standard Implants.

Materials and Methods: The Study Was Carried Out On Separate Acrylic Blocks Containing Implant Assembly (fixture, Abutment, Abutment Screw, Metal Tube Capping The Abutment). 100,000 Cycles Of Eccentric Cyclic Loading Was Applied Before And After Retightening Then Removal Torque Loss Ratio Was Calculated According To Specific Equations And Analyzed By T-student, ANOVA Tests.

Results: There Was Significant Effect Of Retightening The Abutment Screws After Exposure To Dynamic Cyclic Loading.

Conclusions: To Manage Screw Loosening Process, It Is Better To Retighten The Screw Of Standard Implants.

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