错畸形患者Bolton指数的研究

Study on Bolton index of malocclusion patients

目的测量分析错牙合畸形患者的Bolton指数及其异常的分布比例。方法对351例错牙合畸形患者的记存模型进行牙冠宽度测量,并对Bolton指数及其分布进行分析。结果351例患者中Bolton指数前牙比异常者占47.58%,其中过大者占18.52%,过小者占29.06%。全牙比异常者占49.29%,其中过大者占10.26%,过小者占39.03%。Bolton指数前牙比和全牙比男女间差异均无显著性。结论错牙合畸形患者Bolton指数异常的发生率高,在临床诊断和制定矫治计划时应予以考虑。

Objective To investigate Bolton index of malocclusion patients and its abnormal distribution ratio. Melhods 351 malocclusion patients （male 128, female 223）, with average age 15.34±1.26 （14- 16）, were recruited. The tooth width of the subjects were measured, and then Bohon index and the incidence of abnormal Bolton index were analyzed. Results The incidence of abnormal Bolton anterior ratio was 47.58% ,in which the incidence of the oversized group was 18.52% ,and that of the undersized group was 29.06%. The incidence of abnormal Bolton allover ratio was 49.29% ,in which the incidence of the oversized group was 10.26% ,and that of the undersized group was 39. 03 %. There was no significant gender difference both in Bolton anterior ratio and overall ratio. Conclusion The incidence of abnormal Bohon index is considerably high. Bohon index should be taken into consideration in diagnosis and treatment planning.