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Anatomical differences in lower third molars visualized by 2D and 3D X-ray imaging: clinical outcomes after extraction.
MedLine Citation:
PMID:  23352698     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The purpose of this study was to evaluate the relationship between third molars and the inferior alveolar canal using panoramic radiographs and cone beam computed tomography (CBCT) scans and to assess clinical outcomes after third molar removal retrospectively. The degree of superimposition, buccolingual position (buccal, central, and lingual) and physical relationship (separation, contact, and involved) were measured using CBCT scanning. Post-extraction complications were recorded. Based on radiographic evaluation, 45.9% of third molar roots were inside the inferior alveolar canal, 21.3% were in contact with the inferior alveolar canal, and 32.8% were separated from the canal. The frequency at which the mandibular canal was separated from the root apex was significantly higher when the canal was in the buccal position (80.0%) than in the central (20.0%) and lingual positions (0.0%). Although on panoramic radiographs all third molars were directly superimposed on the inferior alveolar canal, CBCT showed direct contact or canal involvement in 67.2% and separation of the canal from the root apex in 32.8%. Complications occurred in nine patients: eight had third molar root apices inside or in contact with the inferior alveolar canal. The prevalence of post-extraction complications correlated with the absence of cortication around the inferior alveolar canal.
Authors:
S H Jun; C H Kim; J S Ahn; B L Padwa; J J Kwon
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-23
Journal Detail:
Title:  International journal of oral and maxillofacial surgery     Volume:  -     ISSN:  1399-0020     ISO Abbreviation:  Int J Oral Maxillofac Surg     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8605826     Medline TA:  Int J Oral Maxillofac Surg     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 International Association of Oral and Maxillofacial Surgeons. All rights reserved.
Affiliation:
Oral and Maxillofacial Surgery, Department of Dentistry, Korea University Anam Hospital, South Korea. Electronic address: kwonjj@korea.ac.kr.
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