The rate of malocclusion in normal students was 62. 3%, ankyloglossia 6. 6% , and abnormity labial frenum 4. 8%.
健康组错畸形患病率62.3%,舌系带过短率6.6%,系带异常率4.8%。
The rate of malocclusion in normal students was 62. 3%, ankyloglossia 6. 6% , and abnormity labial frenum 4. 8%.
健康组错畸形患病率62.3%,舌系带过短率6.6%,系带异常率4.8%。
when the upper lip is connected to the snout by a frenum, the two are continuous and the upper jaw is restricted from being protractile;
被一个系带连接到吻部,两者是连的,而颌则是被局限不能伸出的;
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