Aim: To compare the effectiveness of the canal cleaning ability by using three different NiTi rotary systems, with and without the use of dental microscope, using a scanning electron microscope.
Materials and method: Sixty extracted single rooted mandibular premolar teeth with similar dimensions were randomly divided into two groups of thirty samples each, further subdivided into three groups of ten samples each. GroupI- Specimens were prepared under a dental microscope, Group-II - Specimen were prepared without the use of a dental microscope. Sub group IA, IIA- ProTaper series of rotary instruments. Sub group IB, IIB- Mtwo series of rotary instruments. Sub group IC, IIC- Twisted Files series of rotary instruments. In all specimens 15% EDTA was used during preparation and was irrigated by 3% Sodium hypochlorite and saline. Samples were sectioned bucco-lingually and then observed for debris under a scanning electron microscope.
Results: All instruments showed no statistically significant difference with and without the use of a dental microscope. Mtwo files showed good results in debris score followed by Twisted files. ProTaper showed maximum amount of debris although it was not statistically significant. None of the instruments succeeded in achieving completely clean canals.
Conclusion: The use of magnification did not achieve total root canal debridement in any of the rotary instruments. Mtwo rotary instruments produced least amount of debris. ProTaper rotary instruments showed the maximum amount of debris followed by Twisted files rotary instruments.