Evaluation Of New Rotary Nickel Titanium Systems In Canal Preparation &Obturation (Laboratory & Clinical Study)

Abstract

The aim of this study was to compare between two new rotary systems GTX and TF through their Shaping properties regarding the Preservation of canal shape before and after preparation, the Amount of extruded debris from the apex and Instrument cyclic fatigue; and their obturating properties regarding their Sealing ability of the obturation Systems of the rotary systems, the Ease of obturator removal for retreatment, the Postoperative pain and The obturators radiodensity. I. Shaping properties: 1. Preservation of path Twenty extracted human mandibular first molar were selected with mesial root curvature above twenty degrees of curvature. Teeth were scanned using Scanora3D machine. Image reconstruction was performed using Ondemand3D software version 1.0.9. The dentine thickness was measured at the mesial and distal sides of the mesiobuccal root canal in each tooth at the levels of 3, 5, and 8 mm from the root apex and the measures were saved for comparison with the postoperative scans. The selected twenty extracted teeth were randomly classified into two equal groups according to the NiTi rotary systems used. In group (1): 10 teeth were prepared using GTX rotary system while in group (2) 10 teeth were prepared using TF rotary system.

A post instrumentation CT scan were performed to all the teeth under examination and measurement of the mesial and distal aspects of the mesiobuccal root canal were done. The pre-instrumentation and post-instrumentation measurements are recorded, tabulated and statically analyzed. Three sections were selected for each tooth at 3, 5 & 8 mm from the root apex.