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目的调查正畸患者上颌恒侧切牙发生锥形牙的患病状况。方法对1612例在正畸科就诊患者的病历资料进行上颌侧切牙形态研究,对不同性别和不同错(牙合)类型的患病率进行卡方检验。结果上颌锥形侧切牙的总体患病率为7.6%,男性患病率(8.3%)与女性患病率(7.1%)之间差异无统计学意义(P>0.05)。安氏Ⅱ类错(牙合)畸形中锥形牙的患病率(10.1%)显著高于Ⅰ类(6.1%)和Ⅲ类(6.0%)(P<0.05)。锥形侧切牙双侧发生者占40.2%,单侧发生者占59.8%,其中右侧(35.2%)多于左侧(24.6%)。结论上颌锥形侧切牙在正畸人群中的发病率高于普通人群,其在安氏Ⅱ类错(牙合)畸形患者中的患病率显著高于Ⅰ类和Ⅲ类错(牙合)畸形患者。
Objective To investigate the prevalence of conical teeth in the maxillary permanent incisors of orthodontic patients. Methods 1612 cases of orthodontic patients in the medical records of patients with maxillary lateral incisor morphology, the prevalence of different gender and different occlusion (occlusion) type of chi-square test. Results The prevalence of maxillary conical lateral incisors was 7.6%. There was no significant difference between male prevalence rate (8.3%) and female prevalence rate (7.1%) (P> 0.05). The prevalence of conical teeth in Class Ⅱ malocclusion (10.1%) was significantly higher than that in Class Ⅰ (6.1%) and Class Ⅲ (6.0%) (P <0.05). Conus lateral incisors occurred in 40.2% of bilateral, unilateral occurred in 59.8%, of which the right (35.2%) than the left (24.6%). Conclusion The incidence of maxillary conical lateral incisors in the orthodontic population is higher than that in the general population. The prevalence of maxillary conical lateral incisors in patients with Class Ⅱ malocclusion is significantly higher than that of type Ⅰ and type Ⅲ malocclusions. Deformity patients.