华西口腔医学杂志 ›› 2012, Vol. 30 ›› Issue (6): 610-614.doi: 10.3969/j.issn.1000-1182.2012.06.012

• 临床研究 • 上一篇    下一篇

平面与下颌矢状向位置关系的 X线头影测量研究

叶瑞 王晟 裴姣 赵志河 赵美英   

  1. 四川大学华西口腔医院正畸科, 成都610041
  • 收稿日期:2012-03-13 修回日期:2012-05-08 出版日期:2012-12-01 发布日期:2012-12-01
  • 通讯作者: 赵志河,Tel:028-85503645
  • 作者简介:叶瑞(1987—),女,四川人,博士

Cephalometric analysis of the relationship between occlusal plane and sagittal position of the mandible

Ye Rui, Wang Sheng, Pei Jiao, Zhao Zhihe, Zhao Meiying.   

  1. Dept. of Orthodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, China
  • Received:2012-03-13 Revised:2012-05-08 Online:2012-12-01 Published:2012-12-01

摘要:

目的明确下颌处于不同矢状向位置时的牙形态,以及下颌矢状向位置与平面倾斜度的关系,为下颌矢状向位置异常患者的非手术正畸治疗提供策略依据。方法选取114例女性正畸患者治疗前的114张头影侧位片,根据ANB角的大小分为3组,每组各测量25项指标。对3组之间及两两组之间的差异进行方差分析和多重比较分析,对骨性指标与牙性指标的相关性进行直线相关分析。结果后牙平面(OP-P)倾斜度和上颌第二磨牙的垂直高度与下颌矢状向位置相关(P<0.05)。下颌后缩时,上颌第二磨牙垂直向萌出相对不足,OP-P倾斜度增加;下颌前伸时,上颌第二磨牙垂直向萌出相对过度,OP-P更平坦。当下颌处于不同位置时,牙轴近远中倾斜度有不同的代偿。下颌后缩患者上颌牙列牙轴远中倾斜,下颌牙列牙轴近中倾斜;下颌前突患者上颌牙列牙轴近中倾斜,下颌牙列牙轴远中倾斜。结论不同骨性环境下形态各有不同,正畸治疗下颌位置异常的患者时应重视后牙垂直高度的控制和对OP-P倾斜度的改变。

关键词: 平面, 下颌骨, 矢状向, 头像测量分析

Abstract:

Objective To investigate the relationship between occlusal plane and sagittal position of the mandible by examining dental and skeletal morphologies of average angle patients for better understanding of etiologies and definitive clinical guidelines of mandibular malpositions. Methods The lateral cephalograms of 114 female average angle patients with neutral maxillary positions were selected and divided into three groups according to sagittal mandibular positions(ANB angle). Twenty-five skeletal and dental measurements were compared. The correlations between skeletal and dental measurements were analyzed by rectilinear correlation. Results Cant of posterior occlusal plane(OP-P) and height of the upper second molar were significantly related to sagittal position of the mandible(P<0.05). Height of the upper second molar was relatively inadequate and OP-P was sloped when the mandible was positioned posteriorly; conversely, height of the upper second molar was excessive and OP-P tended to be flat when the mandible was positioned anteriorly. Tooth axial inclinations were affected by sagittal position of the mandible. Maxillary teeth proclined distally and mandibular ones mesially for patients with retrognathia. On the other hand, maxillary teeth proclined mesially while mandibular ones distally for patients with prognathia. Conclusion There was a definite relationship between cant of posterior occlusal plane and sagittal position of the mandible in average angle patients, consistent with the dental morphologies of different skeletal configurations. In treating malocclusions of sagittal discrepancy of mandible, the height of posterior teeth and cant of OP-P might be a primary concern.

Key words: occlusal plane, mandible, sagittal, cephalometric analysis occlusal plane, mandible, sagittal, cephalometric analysis