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Trabecular bone ratio of the mandibular condyle according to the presence of teeth: a micro-CT study

 D. Y. Choi  ;  K. H. Sun  ;  S. Y. Won  ;  J. G. Lee  ;  K. S. Hu  ;  K. D. Kim  ;  H. J. Kim 
 SURGICAL AND RADIOLOGIC ANATOMY, Vol.34(6) : 519-526, 2012 
Journal Title
Issue Date
Aged ; Aged, 80 and over ; Analysis of Variance ; Bicuspid/diagnostic imaging ; Bone Density* ; Cadaver ; Dentition ; Female ; Humans ; Image Processing, Computer-Assisted/methods ; Imaging, Three-Dimensional/methods ; Incisor/diagnostic imaging ; Korea ; Male ; Mandible/diagnostic imaging ; Mandibular Condyle/diagnostic imaging* ; Middle Aged ; Molar/diagnostic imaging ; Sex Distribution ; Tooth/diagnostic imaging* ; Tooth Loss/diagnostic imaging* ; X-Ray Microtomography/methods*
Micro-CT ; Mandible ; Condyle ; Teeth ; Trabecular bone ratio
PURPOSE: During mastication, mechanical pressure from the dentition is transmitted to the trabecular bone of the mandible. The occlusal forces, which could thus affect condylar growth, vary with tooth loss, age, and sex. The trabecular bone of the mandibular condyle is denser in dentate subjects than in edentate subjects. However, since the different tooth groups (incisor, premolar, and molar) have different functions, they could exert different effects on the mandibular condyle. The aim of this study was to elucidate the bone quantity of the Korean mandibular condyle according to the presence of teeth using micro-computed tomography (micro-CT), thereby clarifying the influences of tooth presence on the condylar microstructure. METHODS: Thirty-one sides were scanned and reconstructed into a 3D structure using a micro-CT system. The specimen was sectioned vertically, passing through the medial and lateral poles of the mandibular condyle (P0) to enable measurement of the trabecular bone ratio. Likewise, three additional images, parallel with P0, were acquired. Mean and standard deviation values were calculated, and the t test, one-way ANOVA and post hoc analysis were performed to examine the differences among each group, classified according to the presence of teeth and according to sex. RESULTS: The density of the trabecular bone of the mandibular condyle was significantly associated with the presence of the molars, but not the incisors or premolars. There were significant differences between sexes. CONCLUSIONS: The present study has provided data regarding the bone quantity of the trabeculae of the mandibular condyle according to the presence or absence of teeth.
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2. College of Dentistry (치과대학) > Dept. of Advanced General Dentistry (통합치의학과) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Oral Biology (구강생물학교실) > 1. Journal Papers
Yonsei Authors
Kim, Kee Deog(김기덕) ORCID logo https://orcid.org/0000-0003-3055-5130
Kim, Hee Jin(김희진) ORCID logo https://orcid.org/0000-0002-1139-6261
Won, Sung Yoon(원성윤)
Lee, Jae Gi(이재기)
Choi, Da Yae(최다예)
Hu, Kyung Seok(허경석) ORCID logo https://orcid.org/0000-0002-9048-3805
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