1.The rate of malocclusion in normal students was 62. 3%, ankyloglossia 6. 6% , and abnormity labial frenum 4. 8%.
健康组畸形患病率62.3％,舌系带过短率6.6％,唇系带异常率4.8％。
2.Objective:To investigate the relationship among the congenital hypodontia of mandibular incisor and malocclusion and the variation of medial distal dimension of mandibular canine.
畸形患病率62.3％,舌系带过短率6.6％,唇系带异常率4.8％。
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