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Detecting Dentinal Microcracks Using Different Preparation Techniques: An In Situ Study with Cadaver Mandibles
Paymon Bahrami1, Raymond Scott1, Johnah C Galicia1
1Department of Endodontics, University of the Pacific, Arthur A. Dugoni School of Dentistry, San Francisco, California.
Journal of Endodontics
|October 3, 2017
Summary
This study found no significant difference in dentinal microcrack frequency when using TRUShape, WaveOne Gold, or K-files compared to uninstrumented controls in a cadaver mandible model.
Area of Science:
- Endodontics
- Dental Materials Science
- Biomaterials
Background:
- Assessing dentinal microcracks is crucial for understanding endodontic treatment outcomes.
- Previous studies have shown varied results regarding the impact of different rotary and hand files on dentinal integrity.
Purpose of the Study:
- To compare the frequency of dentinal microcracks in teeth prepared with TRUShape (TS), WaveOne Gold (WO), and K-files (KF) against an uninstrumented control group (CG).
Main Methods:
- A human cadaver mandible model with 95 single-rooted teeth was used.
- Teeth were divided into four groups: CG, TS, WO, and KF, with apical preparation sizes of #25/.06 or #25/.07.
- Sections at 3, 6, and 9 mm from the apex were analyzed for microcracks by three blinded evaluators.
Main Results:
- No significant differences in the frequency, extension, direction, or location of dentinal microcracks were observed among the CG, TS, WO, and KF groups.
- Statistical analysis (chi-square test) showed no significant variations across section levels or between instrument types (P > .05).
Conclusions:
- The instrumentation techniques evaluated (TRUShape, WaveOne Gold, K-files) did not result in a different frequency of dentinal microcracks compared to control.
- These findings suggest that current endodontic file systems may not significantly increase the risk of microcrack formation under the tested conditions.
