青春期青少年颞下颌关节成熟度与第二恒磨牙牙根发育的相关关系  

The correlation between temporomandibular joint maturity and second molar root development in adolescents

作　　者：刘媛媛[1] 王虎[1] 杨振宇[1] 巴凯[1] 李明霞[1] 刘莉[1] 

机构地区：[1]四川大学华西口腔医院放射科,四川成都610041

出　　处：《国际口腔医学杂志》2010年第2期154-156,共3页International Journal of Stomatology

基　　金：国家自然科学基金资助项目(10675087;10574095)

摘　　要：目的观察12～14岁青少年人群颞下颌关节的影像学表现,探讨关节成熟度与下颌第二恒磨牙发育状况的关系。方法选择12～14岁青少年正畸患者52例为研究对象,于正畸治疗前拍摄全景片和双侧颞下颌关节许勒位片。通过颞下颌关节许勒位片观察并评判颞下颌关节骨质的成熟度,通过全景片观察下颌第二恒磨牙牙根的发育情况。分别对颞下颌关节骨质和下颌第二恒磨牙牙根发育状况进行分级评分,并对二者的相关性进行分析。结果颞下颌关节各部分发育的总体趋势具有一致性,其中关节结节与关节凹骨质成熟度的相关系数为0.709,二者发育的相关性较大。第二恒磨牙发育状况与髁突、关节结节及关节凹骨质成熟度的相关系数分别为0.576、0.064、0.091,第二恒磨牙发育状况与髁突成熟度的关系更为密切。结论青少年的颞下颌关节处于发育成熟期。就影像学表现来说,下颌第二恒磨牙牙根发育状况与髁突发育成熟度有较大的相关性,临床上可以通过下颌第二恒磨牙牙根的发育状况来了解髁突的发育状况。Objective To study temporomandibular join（tTMJ） on the radiographs before orthodontic treatment in adolescents and analyze the correlation between TMJ maturity and second molar root development.Methods 52 adolescents aged 12-14 were chosen.The panoramics and lateral Schüller projections were collected,through which the bone maturity of TMJ and the development of second molar root could be made.The maturity rating about TMJ and second molar root development was established respectively.And then the correlation analysis was done.Results The general trends of the developments of three parts of TMJ were the same,in which the correlation coefficient between articular eminence and articular fossa was 0.709.The development of second molar root especially closely related with the maturity of the condyle,because the correlation coefficient between the two parts was 0.576,comparatively the correlation coefficient between second molar root and eminence or fossa were 0.064 or 0.091.Conclusion TMJ in adolescents is just at the maturing stage,but the degree of the development is not consistent in the same age level.The development of second molar root can be used to describe the condyle maturity according to the close relationship between the both in radiograph.

关 键 词：青少年 X线片 颞下颌关节 第二恒磨牙牙根 

分 类 号：R782[医药卫生—口腔医学]