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Characteristics of bony changes and tooth displacement in the mandibular cystic lesion involving the impacted third molar

Authors
 Jin-Hyeok Lee  ;  Sung-Min Kim  ;  Hak-Jin Kim  ;  Kug-Jin Jeon  ;  Kwang-Ho Park  ;  Jong-Ki Huh 
Citation
 Journal of the Korean Association of Oral and Maxillofacial Surgeons (대한구강악안면외과학회지), Vol.40(5) : 225-232, 2014 
Journal Title
 Journal of the Korean Association of Oral and Maxillofacial Surgeons (대한구강악안면외과학회지) 
ISSN
 2234-7550 
Issue Date
2014
Keywords
Ameloblastoma ; Dentigerous cyst ; Mandible ; Odontogenic cysts ; Third molar
Abstract
Objectives: The purpose of this retrospective study is to find the differentiating characteristics of cystic and cystic-appearing lesions that involve the impacted mandibular third molar by analyzing panoramic radiographs and computed tomography images, and to aid the preoperative diagnosis. Materials and Methods: Eighty-one patients who had a mandibular cystic or cystic-appearing lesion that involved impacted mandibular third molar and underwent cyst enucleation were included in the study. The preoperative panoramic radiograph and computed tomography findings were analyzed in accordance to the histopathologic type. Results: Most of the cystic lesions containing the mandibular third molar were diagnosed as a dentigerous cyst (77.8%). The occurrence of mesio-distal displacement of the third molar was more frequent in the odontogenic keratocyst (71.4%) and in the ameloblastoma (85.7%) than in the dentigerous cyst (19.1%). Downward displacement was primarily observed in each group. Odontogenic keratocyst and ameloblastoma showed more aggressive growth pattern with higher rate of bony discontinuity and cortical bone expansion than in dentigerous cyst. Conclusion: When evaluating mandibular cystic lesions involving the impacted mandibular third molar, dentigerous cyst should first be suspected. However, when the third molar displacement and cortical bone absorption are observed, then odontogenic keratocyst or ameloblastoma should be considered.
Full Text
http://www.dbpia.co.kr/Article/3521958
DOI
10.5125/jkaoms.2014.40.5.225
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Oral and Maxillofacial Surgery (구강악안면외과학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Prosthodontics (보철과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Hak Jin(김학진) ORCID logo https://orcid.org/0000-0001-6063-3406
Park, Kwang Ho(박광호) ORCID logo https://orcid.org/0000-0003-1942-2986
Jeon, Kug Jin(전국진) ORCID logo https://orcid.org/0000-0002-5862-2975
Huh, Jong Ki(허종기) ORCID logo https://orcid.org/0000-0002-7381-3972
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/100342
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