刘鸣　高振　吴光宇　刘翔　胡文芸　彭韵文

【摘要】 目的：研究分析骨性Ⅱ类错畸形患者牙弓形态，为后期进一步研究提供数据参考和依据。方法：以49例骨性Ⅱ类错畸形患者为观察组，50例正常颌为对照组，在石膏模型上测量与牙弓形态特征相关的14个项目，比较患者与正常研究对象上下颌不同性别相关测量项结果。结果：测量项目上，观察组男性患者UAD和UCA与对照组比较，差异均有统计学意义（P<0.05）；观察组女性患者的UAD、LPP、LAD和LPAA与对照组比较，差异均有统计学意义（P<0.05）。计算项目上，观察组男性患者的UPP-LPP、UAD-LAD与对照组比较，差异均有统计学意义（P<0.05）；观察组女性患者的所有项目与对照组比较，差异均无统计学意义（P>0.05）。结论：骨性Ⅱ类错畸形患者中，男性患者的牙弓长度不足、尖牙角较小；女性患者的牙弓长度不足、第一前磨牙间宽度较小、后牙弓角较大。

【关键词】 骨性错； 牙弓形态； 牙弓宽度； 牙弓长度

Morphological Analysis of Dental Arch in Patients with Skeletal Class Ⅱ Malocclusion/LIU Ming，GAO Zhen，WU Guang-yu，et al.//Medical Innovation of China，2017，14（27）：030-034

【Abstract】 Objective：To study and analyze the dental arch morphology in patients with skeletal class Ⅱ malocclusion and provide data reference for further research.Method：49 patients with skeletal class Ⅱ malocclusion as observation group，50 normal occlusion people as the control group，in the plaster model，14 items related to the morphological features of the arch were measured and the gender related measurements of the mandible were compared between the patient and the normal subjects.Result：Measurement items，the UAD and UCA of the male patients in the observation group compared with the control group，the differences were statistically significant（P<0.05）；the UAD，LPP，LAD and LPAA in female patients in the observation group were significantly different from those in the control group（P<0.05）.On the calculation project，the UPP-LPP and UAD-LAD of the male patients in the observation group compared with the control group，the differences were statistically significant（P<0.05）；there were no significant differences between the observation group and the control group in all the items（P>0.05）.Conclusion：In patients with skeletal class Ⅱ malocclusion，the length of the dental arch in the male patients is insufficient and the angle of the canines is smaller；the length of dental arch in female patients is not enough，the width of the first premolar is smaller，and the arch angle of posterior teeth is larger.

【Key words】 Skeletal malocclusion； Arch form； Arch width； Arch length

First-authors address：The First Affiliated Hospital of Gannan Medical College，Ganzhou 341000，China

doi：10.3969/j.issn.1674-4985.2017.27.009

牙弓形態在正确诊断治疗错畸形及制定完善有效的正畸治疗计划方面密切相关，目前众多的研究学者对错畸形患者的牙弓进行过研究，但仍不十分完善[1-3]。而骨性Ⅱ类错畸形由于其产生原因多样、治疗稳定性较差等问题受到了较多的关注[4-6]。本研究通过模型进行测量、比较骨性Ⅱ类错畸形患者与正常颌牙弓的形态差异，同时比较骨性Ⅱ类错畸形形态的性别差异，现报道如下。

1 资料与方法

1.1 一般资料 所有研究对象均为赣州市籍贯汉族人，骨性Ⅱ类错畸形患者均为本院口腔科2013年10月-2016年10月收治的49例患者骨性作为观察组，纳入标准：（1）ANB角>5°，wits值>2.1 mm；endprint

（2）牙列完整，无多生牙；（3）无颌部创伤历史，没有正畸或者正颌治疗历史；（4）正中颌时双侧磨牙尖牙Ⅱ类咬合关系，覆盖大于5 mm。排除标准：（1）有过颌部创伤史；（2）有过正畸或者正颌治疗史。其中……