The rate of malocclusion in normal students was 62. 3%, ankyloglossia 6. 6% , and abnormity labial frenum 4. 8%.
健
畸形患病率62.3％,舌系带过短率6.6％,唇系带异常率4.8％。
The rate of malocclusion in normal students was 62. 3%, ankyloglossia 6. 6% , and abnormity labial frenum 4. 8%.
健畸形患病率62.3％,舌系带过短率6.6％,唇系带异常率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;
上嘴唇被一个系带连接到吻
，两者是连
的，而上颌则是被局限不能伸出的；
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类均由互联网资源自动生
，
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