Radiographic examination of the Osseous Abnormalities of the Mandibular Condyle Using Cone Beam Computed Tomography

Cone Beam CT를 이용한 하악 과두의 골 이상에 대한 방사선적 분석

  • Kim, Yu-jin (Department of Prothodontics, Sanbon Dental Hospital, College of dentistry, Wonkwang University) ;
  • Kim, Yun-sang (Department of Prothodontics, Sanbon Dental Hospital, College of dentistry, Wonkwang University) ;
  • Kim, Min-jeong (Department of Prothodontics, Sanbon Dental Hospital, College of dentistry, Wonkwang University) ;
  • Sim, Hun-Bo (Department of Prothodontics, Sanbon Dental Hospital, College of dentistry, Wonkwang University) ;
  • Oh, Sang-chun (Department of Prothodontics, Sanbon Dental Hospital, College of dentistry, Wonkwang University)
  • 김유진 (원광대학교 치과대학 보철학교실) ;
  • 김윤상 (원광대학교 치과대학 보철학교실) ;
  • 김민정 (원광대학교 치과대학 보철학교실) ;
  • 심헌보 (원광대학교 치과대학 보철학교실) ;
  • 오상천 (원광대학교 치과대학 보철학교실)
  • Received : 2009.06.05
  • Accepted : 2009.09.25
  • Published : 2009.09.30

Abstract

The objective of this study is to examine the condylar surfaces in order to find out the types, the incidence and common occurrence area of the osseous abnormalities of the condyles according to the age, genders and the purpose of CT taking, and to compare those between the groups for TMD diagnosis and the other groups. 3D CT images of 199 patients which were scanned with the $i-CAT^{TM}$ Cone Beam Computed Tomography were collected from Sanbon Dental Hospital of Wonkwang university and the MPR images were transfered to the TMJ mode to be showed serial sagittal images and coronal images. The images were macroscopically examined by three independent observers for the types and incidences of the osseous abnormalities, their common occurrence area and general shapes of the condyles. As a result, type F is most common ever than type N. The common occurrence area in sagittal images is antero-superior and superior area except for type D-C which were showed on postero-superior area commonly. In coronal images, latero-superior and superior area is most common except for type E which were present on mesio-superior and superior area most frequently. The osseous abnormalities of the condyles are more common in TMD diagnosis group except for type D-C, that is type N and type D-C are more common in the other groups. In this study, abnormalities of the condyles are classified into 6 types and it has a common occurrence area each. And TMD diagnosis group shows a tendency to have higher rate for osseous abnormalities except for type D-C.

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