| dc.description.abstract | Debris such as dentinal chips and necrotic tissue may be extruded into the periradicular tissue, which may lead to post operative pain and discomfort. Aims: The purpose of this study was to investigate the quantity of apical debris produced in vitro, using two rotary instrumentation techniques. Methods and Materials: Forty single-rooted premolars with a single canal were randomly divided into two groups of 20 teeth each. Each group was instrumented using one of the two instrumentation methods: crown-down technique with Race rotary nickel-titanium file or single-length technique with Mtwo rotary nickel- titanium file. Debris extruded through the apical foramen during instrumentation was collated on pre-weighed polyethylene vials, dried, and weighed by the two instrumentation techniques. The mean weight of extruded debris for each group was statistically analyzed by t-test. conclusion:. statistically t- test analyze showed that the means of apical debris extrusion in single length technique with Mtwo rotary nickel- titanium file (0.00610.00374) was significantly more than the crown down technique with Race rotary nickel- titanium file (0.00340.00218) (P<0.05). | |
