Abstract：
OBJECTIVE: The objective of the study was to assess the differences in dentoskeletal morphology in males with and without temporomandibular joint osteoarthrosis (TMJOA).
METHODS: Three hundred seventy-one male participants seeking orthodontic treatment were enrolled in this cross-sectional study. Each participant\'s osseous status was evaluated using cone-beam computed tomography (CBCT) and classified into normal (N = 104), indeterminate for TMJOA (N = 110) and TMJOA (N = 157) groups. The dentoskeletal characteristics were evaluated using cephalograms. Stratified analysis was performed based on age and skeletal pattern. Descriptive statistics and one-way analysis of variance were performed to investigate dentoskeletal differences among groups. P < .05 was considered statistically significant.
RESULTS: The differences in posterior cranial base length, FMA, MP-OP, anterior facial height, articular angle, ramus height and L1-MP were statistically significant. After stratification by age, the differences in FMA, maxillomandibular angle, posterior facial height, facial height ratio, gonial angle and mandibular body length were statistically significant in adults. No statistical difference except for articular angle was observed in adolescents. After stratification by skeletal pattern, statistical differences were mainly apparent in skeletal Class II adults.
CONCLUSIONS: Males with TMJOA showed a posteriorly positioned and backward-rotated mandible, especially in skeletal Class II adults. Compared with women, the craniofacial morphology of men is less affected by TMJOA. The association between TMJOA and craniofacial morphology also varied across different age groups and skeletal patterns. Prospective studies are required to clarify the cause-effect relationship between TMJOA and craniofacial morphology in males.
METHODS: Three hundred seventy-one male participants seeking orthodontic treatment were enrolled in this cross-sectional study. Each participant\'s osseous status was evaluated using cone-beam computed tomography (CBCT) and classified into normal (N = 104), indeterminate for TMJOA (N = 110) and TMJOA (N = 157) groups. The dentoskeletal characteristics were evaluated using cephalograms. Stratified analysis was performed based on age and skeletal pattern. Descriptive statistics and one-way analysis of variance were performed to investigate dentoskeletal differences among groups. P < .05 was considered statistically significant.
RESULTS: The differences in posterior cranial base length, FMA, MP-OP, anterior facial height, articular angle, ramus height and L1-MP were statistically significant. After stratification by age, the differences in FMA, maxillomandibular angle, posterior facial height, facial height ratio, gonial angle and mandibular body length were statistically significant in adults. No statistical difference except for articular angle was observed in adolescents. After stratification by skeletal pattern, statistical differences were mainly apparent in skeletal Class II adults.
CONCLUSIONS: Males with TMJOA showed a posteriorly positioned and backward-rotated mandible, especially in skeletal Class II adults. Compared with women, the craniofacial morphology of men is less affected by TMJOA. The association between TMJOA and craniofacial morphology also varied across different age groups and skeletal patterns. Prospective studies are required to clarify the cause-effect relationship between TMJOA and craniofacial morphology in males.
摘要：
目的：评估有和没有颞下颌关节骨关节病（TMJOA）的男性牙骨形态的差异。
方法：这项横断面研究招募了三百七十一名寻求正畸治疗的男性参与者。使用锥形束计算机断层扫描（CBCT）评估每个参与者的骨状态，并将其分类为正常（N=104），对于TMJOA(N=110)不确定，和TMJOA（N=157）组。使用头颅图评估牙骨骼特征。根据年龄和骨骼模式进行分层分析。进行描述性统计和单向方差分析以调查各组之间的牙骨骼差异。P<0.05被认为具有统计学意义。
结果：后颅底长度的差异，FMA,MP-OP,前面部高度,关节角,拉姆高度,和L1-MP有统计学意义。按年龄分层后，FMA的差异，上下颌角,后面部高度,面部身高比率,角，成人下颌骨体长有统计学意义。青少年除关节角外无统计学差异。按骨骼模式分层后，统计学差异主要在骨骼II类成人中很明显.
结论：患有TMJOA的男性表现为向后定位和向后旋转的下颌骨，尤其是骨骼II类成人。男性的颅面形态受TMJOA的影响较小。TMJOA和颅面形态之间的关联在不同年龄段和骨骼模式之间也有所不同。需要进行前瞻性研究以阐明男性TMJOA与颅面形态之间的因果关系。
方法：这项横断面研究招募了三百七十一名寻求正畸治疗的男性参与者。使用锥形束计算机断层扫描（CBCT）评估每个参与者的骨状态，并将其分类为正常（N=104），对于TMJOA(N=110)不确定，和TMJOA（N=157）组。使用头颅图评估牙骨骼特征。根据年龄和骨骼模式进行分层分析。进行描述性统计和单向方差分析以调查各组之间的牙骨骼差异。P<0.05被认为具有统计学意义。
结果：后颅底长度的差异，FMA,MP-OP,前面部高度,关节角,拉姆高度,和L1-MP有统计学意义。按年龄分层后，FMA的差异，上下颌角,后面部高度,面部身高比率,角，成人下颌骨体长有统计学意义。青少年除关节角外无统计学差异。按骨骼模式分层后，统计学差异主要在骨骼II类成人中很明显.
结论：患有TMJOA的男性表现为向后定位和向后旋转的下颌骨，尤其是骨骼II类成人。男性的颅面形态受TMJOA的影响较小。TMJOA和颅面形态之间的关联在不同年龄段和骨骼模式之间也有所不同。需要进行前瞻性研究以阐明男性TMJOA与颅面形态之间的因果关系。
