Comparison of newly formed microcracks after instrumentation using Protaper Next, Reciproc and Self-Adjusting File systems

Abstract

Purpose

The purpose of the present study is to assess the rate of newly formed microcracks

comparatively during root canal instrumentation by using ProTaper Next, Reciproc,

and Self-Adjusting File systems using micro-computed tomography.

Subjects and Methods

Thirty mesial roots of mandibular molars were randomly assigned to 3 experimental

groups (n = 10) as follows, ProTaper Next, Reciproc and Self-Adjusting File system.

Preoperative and postoperative scans were obtained at the isotropic resolution of

13.68 μm. Cross-section images were examined to identify the presence of newly

formed dentinal microcracks.

Results

The Self-Adjusting File and Reciproc systems caused a higher rate of new microcrack

formation than the ProTaper Next group (p < 0.001). There were also significant

differences in the new microcrack formation between Reciproc and Self-Adjusting

File groups (p < 0.001).

Conclusion

Reciproc and Self-Adjusting File systems caused a higher rate of newly formed

microcraks compared to ProTaper Next system.

Keywords

• Dentinal microcracks,micro–computed tomography,Protaper Next,Reciproc,Self-Adjusting File

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