Three-dimensional assessment of condylar surface changes and remodeling after orthognathic surgery
이정혜, 이우진, 신재명, 허경회, 이원진, 허민석, 이삼선, 최순철,
소속 상세정보
이정혜 ( Lee Jung-Hye ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Radiology
이우진 ( Lee Woo-Jin ) - Seoul National University College of Medicine Applied Life Science Major Interdisciplinary Program in Radiation
신재명 ( Shin Jae-Myung ) - Inje University College of Medicine Ilsan Paik Hospital Department of Oral and Maxillofacial Surgery
허경회 ( Huh Kyung-Hoe ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Radiology
이원진 ( Yi Won-Jin ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Radiology
허민석 ( Heo Min-Suk ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Radiology
이삼선 ( Lee Sam-Sun ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Radiology
최순철 ( Choi Soon-Chul ) - Seoul National University School of Dentistry Department of Oral and Maxillofacial Radiology
Abstract
Purpose: This study was performed to evaluate condylar surface changes and remodeling after orthognathic surgery using three-dimensional computed tomography (3D CT) imaging, including comparisons between the right and left sides and between the sexes.
Materials and Methods: Forty patients (20 males and 20 females) who underwent multi-detector CT examinations before and after surgery were selected. Three-dimensional images comprising thousands of points on the condylar surface were obtained before and after surgery. For the quantitative assessment of condylar surface changes, point-to-point (preoperative-to-postoperative) distances were calculated using D processing software. These point-to-point distances were converted to a color map. In order to evaluate the types of condylar remodeling, the condylar head was divided into six areas (anteromedial, anteromiddle, anterolateral, posteromedial, posteromiddle, and posterolateral areas) and each area was classified into three types of condylar remodeling (bone formation, no change, and bone resorption) based on the color map. Additionally, comparative analyses were performed between the right and left sides and according to sex.
Results: The mean of the average point-to-point distances on condylar surface was 0.11±0.03 mm. Bone resorption occurred more frequently than other types of condylar remodeling, especially in the lateral areas. However, bone formation in the anteromedial area was particularly prominent. No significant difference was found between the right and left condyles, but condylar surface changes in males were significantly larger than in females.
Conclusion: This study revealed that condylar remodeling exhibited a tendency towards bone resorption, especially in the lateral areas. Condylar surface changes occurred, but were small.
키워드
Bone Remodeling; Imaging, Three-Dimensional; Mandibular Condyle; Multidetector Computed Tomography
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