大连地区错（牙合）畸形分类研究

Research of the classification of malocclusion in Dalian Area

关键词:  正畸  错（牙合）畸形  流行病学  安氏分类

Key words:  orthodontics  malocclusion  epidemiology  angle classification

摘要:

[目的] 调查大连地区错（牙合）畸形患者安氏分类的构成比，探讨安氏各分类中颅面类型的规律及特点。 [方法] 随机抽取因错（牙合）畸形就诊的患者503例，以安氏分类法为标准进行分类，并计算SNA、SNB、ANB角值，分析基骨前后向关系，并统计各种颅面类型的数量，分析产生安氏分类和矢状骨面型分类极端差异的原因。 [结果] 503例错（牙合）畸形患者中，安氏I类关系220例，占43.74%，安氏II类关系162例，占32.21%，安氏III类关系121例，占24.05%。颅面关系类型为上颌正常、下颌正常的患者共229例，占45.53%，为最多。本次调查中未发现上颌前伸、下颌后缩型。 [结论] 大连地区错（牙合）畸形中安氏I类占多数，最常见的颅面关系类型为上颌正常、下颌正常，其次依次为上颌正常、下颌前伸，上颌后缩、下颌后缩以及上颌后缩、下颌正常。

Abstract:

[Objective] To investigate the prevalence of malocclusion classified by Angle's Classification in Dalian area, and to analyze the rules and characteristic of the craniofacial types among different Angle's classifications. [Methods] A random sample of 503 patients who came to clinic to ask for treatment since 2000 was surveyed and was classified according to Angle's classification. Investigator calculated the angle of SNA, SNB and ANB and evaluated the relationship between maxilla and mandible and discussed the reason why there was an extreme difference between Angle's classification and sagittal maxilla-mandibular classification of a same patient. [Results] There were 220 cases among 503 patients, which were 43.74% for Angle I, 162 cases in Angle II, which was 32.21% and 24.05% for Angle III, in which there were 121 patients. There were 229 patients whose craniofacial type was N/N, which was 45.53% in all cases and it was the most common one. We didn't find any patient who was P/R during the research. [Conclusion] Angle I is the most common type of malocclusion in Dalian area and the majority of the maxilla-mandibular relationship is N/N, with N/P, R/R and R/N following in order.