Ahmed Abosheashea Mekawy, Maged Negm And Heba El-Asfouri ,

ABSTRACT
Objective: This Study Was Conducted To Measure The Fracture Resistance Of Endodonticaly Treated Single Rooted Teeth Filledwith Two Different Endodontic Sealers, Prepared With Step-back Technique With Or Without Recapitulation In Presence Or Absence Of Posts.

Materials and Methods: A Total Of 80 Freshly Extracted Sound Human Premolars Were Selected For This Study, Teeth Were Randomly Divided Into Two Equal Groups According To Step Of Preparation Technique With Recapitulation And Without Recapitulation. Each Group Was Divided Into Two Sub-groups According To The Type Of Sealer Used MTA PLUS Sealer And Endosequence Sealer. Each Sub-group Was Divided Into Two Sub-groups According To Presence Or Absence Of Post. Teeth Then Embedded Into Acrylic Resin And Mounted On A Computer Controlled Materials Testing Machine To Detect Fracture Resistance Values.

Results: MTA Plus And Without Post Showed The Lowest Significantmean Fracture Resistance, While The Highest Statically Significantmean Fracture Resistance Was For With Recapitulation, Endosequence And With Post.

Conclusions: Step-back Technique With Recapitulation In Preparation Of The Root Canals Of Endodontically Treated Teeth Can Be Applied To Gain Reinforcement Of The Root. Combination Between Dental Post Insertion And Root Canal Obturation By Bioceramic Based Sealers Provides Proper Protection For The Tooth Against Unfavorable Root Fracture.