Related Experiment Video
Updated: Dec 15, 2025
04:04
Lateral Molar Approach-Driven Transoral Endoscopic Procedure for Benign Infratemporal Fossa Tumor Resection
Published on: August 15, 2025
250
Why Is Mandibular Third Molar Coronectomy Successful Without Concurrent Root Canal Treatment?
Rodney N Nishimoto1, Andrew T Moshman2, Thomas B Dodson3
1Resident, Department of Oral and Maxillofacial Surgery, University of Washington School of Dentistry, Seattle, WA.
Summary
Root canal treatment (RCT) during coronectomy does not reduce postoperative infections. Retained M3 roots after coronectomy do not require RCT, as submersion prevents infection.
Area of Science:
- Oral and Maxillofacial Surgery
- Endodontics
- Infectious Disease
Background:
- Coronectomy is used to prevent inferior alveolar nerve injury during mandibular third molar (M3) extraction.
- Concerns exist regarding infection risk from submerged M3 roots with exposed pulp.
Purpose of the Study:
- To determine if concurrent root canal treatment (RCT) reduces postoperative infections after M3 coronectomy.
- To review studies on pulpal physiology related to coronectomy.
Main Methods:
- A comprehensive review of controlled studies comparing M3 coronectomy with and without concurrent RCT.
- Inclusion criteria: English, human studies, reported postoperative infection outcomes.
Main Results:
- Only one relevant study was identified.
- Postoperative infection rates were 87.5% with RCT and 12.5% without RCT.
Conclusions:
- Concurrent RCT at the time of coronectomy does not decrease postoperative infection frequency.
- RCT is unnecessary for retained M3 roots after coronectomy.
- Intentional root submersion does not necessitate RCT.
