In-vitro Comparative Study To Assess The Shaping Ability of The Single File Technique in Preparation of The Root Canals

The specimen consists of 72 extracted teeth with curved roots (15-35)degree . They were cleaned and preserved in formalin for 48 hours. Each tooth was mounted in a self curing acrylic block. The samples were divided into three groups. Each group (24 canals) was instrumented with one of the systems (WaveOne, Reciproc, OneShape).