安氏Ⅱ~1与Ⅱ~2唇齿关系的形态特征  

The Study of Morphology with Lip-Teeth Relationship in Angle's Class Ⅱ~1 and Ⅱ~2 Malocclusion

作　　者：李多[1] 梁甲兴[1] 林立[1] 张玉华[1] 

机构地区：[1]福建医科大学附属协和医院口腔正畸科,福州350001

出　　处：《福建医科大学学报》2005年第4期413-415,共3页Journal of Fujian Medical University

摘　　要：目的研究安氏Ⅱ1与Ⅱ2错的唇齿关系形态特征,探讨该特征间接反映的功能活动状态在错发生、发展过程中的意义。方法60例Ⅱ1错、48例Ⅱ2错患者为研究组,50例I类正常面型患者为对照组。采用反映面骨关系的一般性项目(SNA角、SNB角、ANB角、SN-MP角、SN-OP角、SN-PP角、S-Go、N-Me、S-Go/N-Me),与唇齿关系项目(U1-SN角、L1-MP角、U1-PP、U6-PP、NLA角、Stmi-U1、LL-U1、UA-U1、UA-1角)进行比较分析。结果Ⅱ1错UA-U1、UA-1减小,NLA减小,Stmi-U1减小,其唇齿关系上中切牙明显唇倾并与上唇过度贴合,上唇外翻,下唇对上中切牙覆盖明显减少。Ⅱ2错U1-PP增大,UA-U1、UA-1增大,Stmi-U1增大,其唇齿关系为上中切牙舌倾并伸长;上唇与上中切牙分离;下唇过度覆盖上中切牙牙冠。结论Ⅱ1错呈唇封闭不足的状态,Ⅱ2错呈唇封闭过度的状态。Objective To study the morphology with lip-teeth relationship in Angle＇s class Ⅱ^ 1 and Ⅱ^ 2 malocclusion by cephalometrics, and to discuss the meaning of the functional state which was reflected by lip-teeth relationship. Methods 60 patients with Angle＇s class Ⅱ^2 malocclusion and 48 patients with Angle＇ s class Ⅱ^ 2 malocclusion were separately compared with 50 patients with Angle＇s class I who had normal profile by cephalometrics. Results In Angle＇s class Ⅱ^2 patients, the upper incisors labially inclined and closed up the upper lip, the lower lip reduced the covering with the upper incisors＇ crown. In Angle＇s class Ⅱ^2 patients, the upper incisors elongated and lingually inclined, the upper lip was separated from the upper incisors, the lower lip covered most of the upper incisors＇ crown. Conclusion The lip-teeth relationship in Angle＇s class Ⅱ^1 could point out that the lip seal is deficient. The lip-teeth relationship in Angle＇s class Ⅱ^2 could point out that the lip seal is excessive.

关 键 词：错HE 安氏Ⅱ类 正畸学 矫正 颅骨测量法 

分 类 号：R783[医药卫生—口腔医学]