Min-Seok Chang1, Jeong-Ho Choi1, Il-Hyung Yang2, Jung-Sub An3, Min-Suk Heo4, Sug-Joon Ahn5. 1. Department of Orthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea. 2. Department of Orthodontics and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea. 3. Department of Orthodontics, Seoul National University Dental Hospital, Seoul, Republic of Korea. 4. Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea. 5. Department of Orthodontics and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Republic of Korea. Electronic address: titoo@snu.ac.kr.
Abstract
OBJECTIVES: The aim of this study was to assess the relationship between mandibular condylar volume and disk displacement status in adult males and females. STUDY DESIGN: We evaluated 122 temporomandibular joints in 61 patients using magnetic resonance imaging (MRI) and computed tomography (CT). MRI data were used to assign disk status as normal disk position (NR), disk displacement with reduction (DDR), or disk displacement without reduction (DDNR). CT data were used to calculate total condylar volume and its components, cortical volume, and trabecular volume. The relationships among condylar volume, disk status, and gender were tested with 2-way analysis of variance. RESULTS: Condylar volumes significantly correlated with disk displacement, tending to decrease as displacement increased. There were significant differences in both total condylar volume and trabecular volume among the DD status (NR > DDR > DDNR), whereas cortical volume was significantly different only between NR/DDR and DDNR (NR/DDR > DDNR). The volume decreases associated with temporomandibular joint DD were found in both males and females, with greater decreases in men than in women as DD progressed. CONCLUSIONS: Condylar volumes are significantly associated with disk displacement status. Joints with nonreducing disks showed the smallest condylar volumes in both males and females.
OBJECTIVES: The aim of this study was to assess the relationship between mandibular condylar volume and disk displacement status in adult males and females. STUDY DESIGN: We evaluated 122 temporomandibular joints in 61 patients using magnetic resonance imaging (MRI) and computed tomography (CT). MRI data were used to assign disk status as normal disk position (NR), disk displacement with reduction (DDR), or disk displacement without reduction (DDNR). CT data were used to calculate total condylar volume and its components, cortical volume, and trabecular volume. The relationships among condylar volume, disk status, and gender were tested with 2-way analysis of variance. RESULTS: Condylar volumes significantly correlated with disk displacement, tending to decrease as displacement increased. There were significant differences in both total condylar volume and trabecular volume among the DD status (NR > DDR > DDNR), whereas cortical volume was significantly different only between NR/DDR and DDNR (NR/DDR > DDNR). The volume decreases associated with temporomandibular joint DD were found in both males and females, with greater decreases in men than in women as DD progressed. CONCLUSIONS: Condylar volumes are significantly associated with disk displacement status. Joints with nonreducing disks showed the smallest condylar volumes in both males and females.
Authors: Saba Ahmed Al-Hadad; Enas Senan ALyafrusee; Abbas Ahmed Abdulqader; Waseem Saleh Al-Gumaei; Rana A A M Al-Mohana; Liling Ren Journal: BMC Oral Health Date: 2022-04-28 Impact factor: 3.747
Authors: Max-Philipp Lentzen; Maximilian Riekert; Johannes Buller; Andrea Grandoch; Matthias Zirk; Joachim E Zoeller; Matthias Kreppel Journal: Oral Maxillofac Surg Date: 2021-06-10