恩施州前牙乳牙期反患者Bolton指数的测定和分析

Measurement and Analysis of Bolton Ratios of Anterior Crossbite in Primary Dentition in Enshi Tujia and Miao Autonomous Prefecture

目的:通过对恩施州乳牙期前牙反患者Bolton指数的测定和分析,探讨本州乳牙期前牙反与Bolton指数之间的关系。方法:选择乳牙记存模型186副,依据前牙咬合关系分为反牙合组和非反组,各组内再根据民族、性别进一步分组。测量Bolton指数并进行全面的统计分析。结果:两组患者民族、性别间Bolton指数差异无显著性,但前牙反组Bolton指数较非前牙反组Bolton指数偏大,并且差异有显著性。结论:下颌牙量偏大可能是导致乳牙期前牙反的主要原因之一。

Objective： To determine the Bolton ratios of anterior crossbite in primary dentition in Enshi Tujia and Miao Autonomous Prefecture. Methods： 186 pairs of study models in primary dentition were selected, and divided into anterior crossbite group and non--anterior crossbite group through anterior relationship. Then, each group was divided by populations and gender. Anterior,posterior and overall bolton ratios were determined and analyzed. Re- sults： No signifiant difference of bolton ratios was found in populations and gender. However, there were significant difference of bolton ratios between anterior crossbite group and non-anterior crossbite group, and the anterior crossbite groups＇ bolton ratios were bigger. Conclusion： The large teeth size of the mandible may be one of the im- portant factors in the cause of anterior crossbite in primary dentition.