Nouman Anayat, Ahmed Yar, Mamoona Mujtaba.
Difference in obturation quality in posterior teeth after manual and rotary canal preparation techniques.
Pak Oral Dental J Jan ;36(3):460-3.

The aim of this study was to assess the radiographic quality of root canal obturation provided by the postgraduate students in posterior teeth using nickel-titanium (NiTi) rotary files in a crown-down approach compared with stainless steel standard preparation technique. It was cross sectional analytical study and data was retrospectively retrieved by periapical radiographs of root canal treated posterior teeth from archival records of Armed Forces Institute of Dentistry. Teeth with excessive root curvature were not included in the study. A total of n=80 post obturation radiographs were retrieved. Forty radiographs of posterior teeth prepared with rotary preparation technique and 40 radiographs of posterior teeth prepared with manual preparation technique. These radiographs were assessed to evaluate technical quality of obturation in terms of length, density and taper of root filling. Chi- square test was applied to compare the difference in technical quality of obturation between two canal preparation techniques. Amongst 40 molars prepared with rotary instruments, 36 had acceptable length, 34 had adequate density and 37 had adequate taper. Amongst 40 molars prepared manually, 24 had acceptable length, 15 had adequate density and 22 had adequate taper. Radiographic technical quality of the obturation (length, density and taper) was better with rotary technique as compared to manual canal preparation technique.

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