* 刘加强吴勇孙良严王洁赵晶蕾代庆刚房兵 255 80 175 10-45 X SPSS 17. 0 255 89 54 60. 67% 96 75 78. 13% 70 47 67. 14% [ ] R782.6 [ ] A [ ] 1009-3761(2014)03-0140- 05 Analysis of TMJ structural abnormalities in patients with different maxillary and mandibular sagittal positions LIU Jia-qiang, WU Yong, SUN Liang-yan, WANG Jie, ZHAO Jing-lei, DAI Qing-gang, FANG Bing. (Department of Oral and Cranio-Maxillofacial, Ninth People s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China) Abstract Objective: To investigate the structural abnormalities of the tempora-mandibular joint (TMJ) in patients with different maxillary and mandibular sagittal positions. Methods: 255 subjects were randomly selected from the orthodontic patients treated in the hospital in the past two years: 80 males and 175 females, and ages from 10 to 45 years old. Routine radiographs and MRIs were taken on both sides of TMJ with bite and open positions in order to evaluate the TMJ structures. The statistical analysis was conducted by using SPSS 17.0. Results: Among all the 255 patients, there were 89 skeletal Class I patients with 54 patients (60.67% ) with abnormal TMJ structures, 96 skeletal Class II patients with 75 patients (78.13%) with abnormal TMJ structures, and 70 skeletal Class III patients with 47 patients (67.14%) with abnormal TMJ structures. Conclusion: TMJ structures abnormity is common in orthodontic patients, especially in skeletal Class II patients. Key words: orthodontics; temporamandibular joint; structural abnormalities; maxillar and mandible [3-5] (magnetic resonance [1 imaging MRI) 2] (temporamandibular joint [6 7] TMJ) * 基金项目 : 国家自然科学基金面上项目 ( 项目编号 :81371178) 上海市教委科研专项基金 ( 项目编号 :ZZjdyx12101) 上海市科学技术委员会重点项目 ( 项目编号 :12JC1405700) 刘加强 上海交通大学医学院附属第九人民医院口腔颅颌面科 主治医师 上海 200011 吴 勇 上海交通大学医学院附属第九人民医院口腔颅颌面科 主治医师 上海 200011 孙良严 上海交通大学医学院附属第九人民医院口腔颅颌面科 硕士生 上海 200011 王 洁 上海交通大学医学院附属第九人民医院口腔颅颌面科 硕士生 上海 200011 赵晶蕾 上海交通大学医学院附属第九人民医院口腔颅颌面科 硕士生 上海 200011 代庆刚 上海交通大学医学院附属第九人民医院口腔颅颌面科 硕士生 上海 200011 房 兵 通讯作者 上海交通大学医学院附属第九人民医院口腔颅颌面科 主任医师 教授 上海 200011 140
3 4 TMJ 5 1. 6 1. 1 2011 10 2013 6 8 255 ( ) 80 175 10-45 21. 22 ( ) ANB 7 3 1 TMJ MRI 1. 2 (MRI) 2 TMJ MRI ( ) 1. 3 SPSS 17. 0 3 TMJ MRI α= 0. 05 2. 2. 1 MRI X MRI X ( ) ( ) TMJ 11 1 2 TMJ ( ) 4 141
5 TMJ MRI 96 70 255 89 54 60. 67% 96 75 78. 13% 70 47 67. 14% VS P = 0. 010 VS P= 0. 400 VS P= 0. 113 9 6 TMJ MRI 9 ANB 7 TMJ MRI ( ) ( ) 89 54 60. 67% 36 40. 45% 45 50. 56% 9 45 50. 56% 9 96 75 78. 13% 58 60. 42% 66 68. 75% 8 67 69. 79% 9 70 47 67. 14% 33 47. 14% 42 60. 00% 9 38 54. 29% 5 10 8 ( ) 2. 2 ANB 0-5 ANB 5 ANB 0 255 89 10 54 142
3. 20-30 11 [8 9] TMD TMD 11 [10 11] 75 20-30 12 20 MRI TMJ X 12 47 255 89 54 60. 67% 96 75 13 13 78. 13% 70 47 67. 14% VS P = 0. 010 VS P = 0. 400 VS P = 0. 113 P = 0. 010 143
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