The prevalence rates of the malocclusion, ankylogolossia and the abnormity labial frenum are no significant difference between two groups (P>0. 0) and they are not related with the deaf-muteness.
The prevalence rates of the malocclusion, ankylogolossia and the abnormity labial frenum are no significant difference between two groups (P>0. 0) and they are not related with the deaf-muteness.
两组错畸形、舌系带过短、唇系带异常率差异均无显著性(P>0.0)。