西安市青少年融合牙状况调查分析

An Epidemiological Survey of Mandibular Fused Tooth in 3868 teenagers of Class Ⅰ Malocclusion in Xi'an City

目的:调查西安地区青少年融合牙的发生情况及分布特点。方法:采用流行病学调查方法,对西安市6所中学及大学3868名13～23岁青少年进行口腔检查。结果:3868名青少年中融合牙发生率为2.77%,男女性别之间无统计学差异;融合牙主要发生于下颌的前牙区,下颌占85.05%,上颌占14.95%。安氏Ⅰ类、Ⅱ类、Ⅲ类融合牙的发病率分别为33.33%、46.67%和20%。其安氏Ⅰ类下颌融合牙的好发部位依次为:C3C2、D1D2、D2D3、C2C1、C1D1、其它。结论:融合牙有一定的发生率,给正畸矫治带来麻烦,影响正常覆合覆盖关系。口腔科医生应予重视并及时处理。

Objective： To clarify the occurence and distribution of mandibular fused tooth in class Ⅰ malocclusion in xi＇an. Methods： By using epidemiological survey, 3868 teenagers were examined, who aged from 13 to 23 years in 6 middle schools and colleges. Results： Of 3868 teenagers investigated, fusion of the teeth were （2.77 percent） without sex predilection, mainly located in the anterior region, more frequently in the mandibular （ 85.05 percent）. The incidence of fused teeth in class Ⅰ , Ⅱ, Ⅲ were 33.33% , 46.67% , 20% respectively. The fused teeth in mandible of class Ⅰ malocclusion typically occurred in sequence of C3C2, D1D2, D2D3, C2C1, C1D1. Condusion： The occurence of fused teeth may cause some complications. Dentists should pay attention to the fused teeth occured in young people.