Document Detail

Coronectomy of the Lower Third Molar Is Safe Within the First 3 Years.
MedLine Citation:
PMID:  22494507     Owner:  NLM     Status:  Publisher    
PURPOSE: There is no long-term evaluation on the safety of coronectomy of the lower third molar. The aim of this study was to investigate the 3-year morbidity of coronectomy of the lower third molars and to monitor the behavior and migration pattern of the retained roots after coronectomy. MATERIALS AND METHODS: This was a prospective cohort study. Patients with lower third molars with specific radiographic sign(s) showing proximity of the roots to the inferior alveolar nerve who underwent coronectomy in a previous randomized clinical trial were reviewed postoperatively in the first week and the third, sixth, 12th, 24th, and 36th months. The morbidities of infection, pain, root eruption, reoperation to remove the root, and the development of any pathology were recorded. The pattern of any root migration was analyzed. RESULTS: Ninety-eight patients (35 men and 63 women; mean age, 25.7 yrs; standard deviation, 7.9 yrs) with 135 coronectomies completed the 36-month review. None presented with infection or pain from the postoperative third month onward. Root eruption causing sensitivity occurred in 3% (4/135) of the sample and the erupted roots were removed. None of the reoperated cases presented with a postoperative inferior alveolar nerve deficit. No pathology developed in any of the retained roots after coronectomy. Root migration was noted in most cases in the first 12 months, and all roots stopped migrating from the 24th month onward. The mean root migration at 36 months was 2.8 mm (standard deviation, 1.4 mm). CONCLUSIONS: This study confirms that retained roots after coronectomy in the lower third molars produce no complications in terms of infection, pain, or the development of pathologies within the first 3 years. Root eruption can occur in a very small percentage of patients and may require reoperation to remove the root.
Yiu Yan Leung; Lim Kwong Cheung
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-4-9
Journal Detail:
Title:  Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons     Volume:  -     ISSN:  1531-5053     ISO Abbreviation:  -     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-4-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8206428     Medline TA:  J Oral Maxillofac Surg     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 American Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.
Clinical Assistant Professor, Discipline of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Hong Kong, Hong Kong.
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