替牙期骨性Ⅲ类错患者颞下颌关节特征的锥形束CT研究  

Characteristics of Temporomandibular Joint by Cone-beam Computed Tomography in Patients with Skeletal Class Ⅲ Malocclusion in Mixed Dentition

作　　者：邹绍丹 陈明珠[1] 尹康[1] 

机构地区：[1]昆明医科大学附属口腔医院正畸科,云南昆明650031

出　　处：《口腔医学研究》2017年第1期55-59,共5页Journal of Oral Science Research

基　　金：云南省医疗卫生单位内设研究机构基金资助项目(编号:2014NS292)

摘　　要：目的:采用锥形束CT(CBCT)研究替牙期骨性Ⅲ类错牙合患者颞下颌关节的影像学特征,探讨Ⅲ类功能状态下,颞下颌关节的生长、改建机制。方法:从就诊于昆明医科大学附属口腔医院正畸科的患者中选取符合纳入标准的替牙期骨性Ⅲ类错牙合患者及骨性Ⅰ类错牙合患者各20名,使用NNT viewer 5.3图像处理软件进行三维重建及线距和角度的测量,并进行统计学分析。结果:替牙期骨性Ⅲ类错牙合患者组和替牙期骨性Ⅰ类错牙合患者组对比结果为:矢状面双侧关节前间隙偏小、双侧关节上间隙偏小、双侧关节结节斜度偏小;冠状面双侧关节内间隙偏小,双侧关节上间隙偏小,双侧关节外间隙偏小,右侧髁状突角度偏小;横截面右侧髁状突前后径偏小。结论:替牙期骨性Ⅲ类错牙合患者颞下颌关节发育不充分,呈现髁状突,关节窝深度,关节结节斜度;冠状面关节内、外间隙均较小的特征。骨性Ⅲ类错牙合患者髁状突在关节窝中处于前置近关节窝顶位置。骨性Ⅲ类错牙合患者颞下颌关节影像学特征与其功能状态相适应。Objective：To investigate the features of temporomandibular joint by cone-beam computed tomography（CBCT）in patients with skeletal classⅢ malocclusion in mixed dentition,and to explore the mechanism of the growth and remodeling of the temporomandibular joint.Methods：Twenty patients with skeletal classⅢ malocclusion and twenty patients with skeletal classⅠmalocclusion in mixed dentition were selected from the Department of Orthodontics,Stomatological Hospital affiliated to Kunming Medical University.NNT viewer 5.3software was utilized to measure the relevant parameters from the CBCT scanning data.The acquired data were then analyzed.Results：Compared with the patients with skeletal classⅠmalocclusion in mixed dentition,the patients with skeletal classⅢ malocclusion in mixed dentition showed characteristics as follow：（1）in sagittal plane,bilateral anterior and superior spaces between the condyle and the fossa were smaller,and the gradient of the articular tublecle were smaller;（2）in coronal plane bilateral medial and superior spaces between the condyle and the fossa were smaller,and the condylar angle were smaller in the right side;（3）in the transverse cross section plane the right condylar anteroposterior diameters were smaller.Conclusion：（1）The temporomandibular joint of patients with skeletal class Ⅲmalocclusion in mixed dentition is not fully developed,and condyle,condylar fossa depth,gradient of articular tubercle,coronal medial and superior joint space are smaller.（2）The condyle usually locates anteriorly near to the roof of the fossa in patients with skeletal classⅢ malocclusion in mixed dentition.（3）The image characteristics of the temporomandibular joint in patients with skeletal class III malocclusion are adapted to their biological functions.

关 键 词：替牙期骨性Ⅲ类错 替牙期骨性Ⅰ类错 颞下颌关节 锥形束CT 

分 类 号：R783.5[医药卫生—口腔医学]