上海市奉贤区错殆畸形的Bolton指数检测

Bolton analysis with malocclusions in Shanghai Fengxian district

目的测量上海市奉贤区错[牙合]畸形患者的Bohon指数，分析Bolton指数在性别、年龄和安氏错殆分类患者间的差异。方法选取符合条件的上海市奉贤区错[牙合]畸形患者348例为研究对象，分别按性别、年龄和安氏类型分组，分别比较各组患者模型Bohon指数前牙比、全牙比之间的关系。结果上海市奉贤区不同性别组、不同年龄段组间Bolton指数差异均无统计学意义（均P〉0．05）。安氏三类错[牙合]畸形患者前牙比分别为（79．88±3．15）％、（78．91±2．86）％、（80．59±1．55）％，前牙比中Ⅰ类与Ⅲ类差异无统计学意义（P〉0．05），Ⅰ类与Ⅱ类、Ⅱ类与Ⅲ类差异均有统计学意义（P=0．024、P=0．015）。安氏三类错牙合畸形患者全牙比分别为（79．88±3．15）％、（79．88±3．15）％、（79．88±3．15）％，差异均无统计学意义（均P〉0．05）。结论上海市奉贤区Bohon指数符合我国制定的标准，性别、年龄不是影响奉贤地区Bolton指数的因素，Bolton指数异常是错殆畸形的重要影响因素。临床上应特别注意安氏Ⅱ类错[牙合]的Bolton指数分析，结合Ⅱ类错[牙合]具体分型制定矫治计划。

Objective To measure Bolton index with malocclusions in Shanghai Fengxian district, and ana- lyze the distinction among different malocclusions patients in respect of gengder, age, and different Angle classifica- tion. Methods Measure Bolton index of plaster models of 348 eligible malocclusions patients who were selected ran- domly from Shanghai Fengxian District, and divided them into different groups by gender, age and Angle classification. Then, Bohon overall ratio and Bohon anterior ratio among these groups were analyzed and compared. Results The results showed that there were no significant differences of Bolton analysis in respect of gender or age （ all P 〉 0. 05 ）. It exsisted obvious differences in anterior ratios among the three Angle malocclusion class （P 〈 0.05 ）. Bolton anterior ratios were （79.88 ±3.15）% ,（78.91 ±2.86）% and （80.59 ± 1.55）% ,mean of Class Ⅰ and mean of Class m were bigger than that of Class Ⅱ. Bolton overall ratios of Angle class Ⅰ , class Ⅱ and class Ⅲ were （ 79.88 ± 3.15 ）%, （79.88± 3.15 ）% and （79.88 ± 3.15 ）%, and there were no obvious differences in overall ratios among them. Conclusion Bohon index with malocclusions for Shanghai Fengxian District accord with normol Bohon index of our country. Gender and age are not the influencing factors of Bolton index in Fengxian District. Bloton index anomalies are the important fator in maloeclusions. We should pay more attention to the Bohon analysis of class Ⅱ malocclusions in clinical practice, and draw up a treatment plan combined with specific classification.