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Danger zone in mandibular molars before instrumentation: an in vitro study
Paulo Ferreira Garcia Filho1, Ariadne Letra, Renato Menezes
1Department of Endodontics, Federal University of Rio de Janeiro.
Journal of Applied Oral Science : Revista FOB
|March 12, 2011
Summary
This study measured the "danger zone" in mandibular molars, identifying risks of strip perforations during root canal instrumentation. The average danger zone thickness in mesial roots was found to be approximately 0.79mm.
Area of Science:
- Endodontics
- Dental Anatomy
Background:
- Root canal instrumentation carries risks, including strip perforations.
- Mandibular molars present unique anatomical challenges during endodontic treatment.
Purpose of the Study:
- To quantify the
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Main Methods:
- One hundred mesial roots of mandibular molars were sectioned 2mm below the furcation.
- Microscopic measurements were taken of distal concavities.
- The thickness was measured from the canal border to the outer dentin of the root.
Main Results:
- The average thickness of the danger zone in mesial roots was 0.789 +/- 0.182mm.
- No significant statistical differences were found between mesiobuccal and mesiolingual canals.
Conclusions:
- The study provides crucial data on the danger zone in mandibular molars.
- Understanding this measurement aids in preventing strip perforations during endodontic procedures.
