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Retrograde Instrumentation of Surgically Resected Roots Using Controlled Memory Files: A Human Cadaver Study
Matthew W Hatzke1, Francesca C Daigle1, Robert A Augsburger1
1Department of Endodontics, Texas A&M College of Dentistry, Dallas, Texas.
Journal of Endodontics
|June 20, 2020
Summary
Controlled memory files effectively clean surgically resected roots with minimal residual obturation material. This retroinstrumentation technique shows low adverse outcomes, indicating a safe and effective approach for deep retropreparations.
Area of Science:
- Endodontics
- Dental Materials Science
Background:
- Root canal treatment is crucial for preserving teeth.
- Surgical resection of roots may be necessary in complex cases.
- Residual obturation material can impact treatment success.
Purpose of the Study:
- To evaluate residual obturation material after retroinstrumentation of surgically resected roots.
- To assess adverse treatment outcomes associated with this technique.
Main Methods:
- Thirty maxillary anterior teeth underwent root canal treatment and surgical resection.
- Retropreparations were created using controlled memory files (VTaper 2H).
- Micro-computed tomography analyzed residual material; instrument separation, cracks, and ledges were recorded.
Main Results:
- Median residual obturation volumes were 0.18 mm³ at 5 mm and 1.97 mm³ at 10 mm.
- File separation occurred in 13.33% of cases.
- No crack or ledge formation was observed.
Conclusions:
- Retroinstrumentation with controlled memory files effectively cleans resected root canals.
- The technique demonstrates a low incidence of adverse outcomes.
- It offers a safe and effective method for deep retropreparations.
