TY - JOUR ID - TI - The effects of canal preparation by different NiTi rotary instruments and reciprocating WaveOne file on the incidence of dentinal defects AU - Dr. Iman M. Al-Zaka, B.D.S., M.Sc د. ايمان محمد الزقى PY - 2012 VL - 9 IS - 2 SP - 137 EP - 142 JO - MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان SN - 26188500 18138500 AB - The purpose of this study was to compare dentinal defect formation while usinghand files (HFs), two brands of nickel-titanium (NiTi) rotary files and the WaveOnefile. Eighty mandibular first molars were selected and divided into 4 groups. Hand file(HFs), WaveOne reciprocating file (WO), EndoSequence file (ES), ProTaper file(PT), were used to prepare the 2 mesial canals. Roots were then sectioned 3, 6, and 9mm from the apex, and the cut surface was observed under a microscope and checkedfor the presence of dentinal defects. HF group showed the lowest percentages ofdentinal defects (5%). In roots prepared with the WO, ES, and PT, dentinal defectswere observed in 25%, 10%, and 50% of teeth, respectively. There was a significantdifference between HFs group and both of WO group and PT group (P <0.05).However, no significant difference was found between HFs group and ES group (P ≥0.05). Also a non significant difference was found between WO group and ES group(P ≥ 0.05). All rotary files created defects in the root dentin, whereas handinstrumentation presented with satisfactory results.

ER -