Shetty S.,Dr Dy Patil Dental College And Hospital |
Hegde M.N.,B Shetty Memorial Institute Of Dental Science |
Devadiga D.,B Shetty Memorial Institute Of Dental Science
Research Journal of Pharmaceutical, Biological and Chemical Sciences | Year: 2013
The aim of this in vitro study was to evaluate the debris and smear layer in the root canal following the use of Ni-Ti ProTaper Hand, ProTaper rotary and Quantec rotary instruments. Forty five freshly extracted single rooted human mandibular premolar teeth were selected. Crowns of all teeth were cut off at the cemento-enamel junction with a separating disc and the roots were randomly divided into three groups of fifteen samples each. Each group was further divided into three subgroups. The working length of all teeth was established by the insertion of endodontic instrument into the canal until its tip is visible at the apical foramen and then by subtraction of 0.5 mm. A sequential crown down instrumentation technique was carried in all the three groups as follows: Group I- ProTaper Ni-Ti hand instruments. Group II - ProTaper rotary instruments. Group III - Quantec rotary instruments. Irrigation was done with 3% sodium hypochlorite and 15% EDTA in all the three groups. Teeth were carefully split and subjected to Scanning Electron Microscopic evaluation for debris and smear layer. Results showed that when comparing Ni-Ti ProTaper hand, ProTaper rotary instruments and Quantec rotary instruments; ProTaper rotary instruments produced the maximum amount of debris and smear layer followed by Quantec rotary instruments, while the ProTaper hand instruments showed the least amount of debris and smear layer.