骨性Angle III类错替牙期患者语音功能的研究

Articulation of the children with skeletal Angle III malocclusion and mixed dentition

目的 :探讨替牙期AngleⅢ类骨性反牙合对语音功能是否有影响及影响程度 ;对发音异常的语音进行声学分析。方法 :3 8名替牙期AngleⅢ类骨性反 牙合患者为研究对象 ,并随机选择 40名替牙期正常牙合儿童做对照组。由语音专家对 2组儿童的语音进行判听 ,记录错误音素及错误类型 ,并应用计算机语音工作站对错误音素进行语音声学分析。结果 :①骨性AngleIII类错牙合替牙期患者大多数存在发音异常 ,主要集中于 /z ,c ,s/等咝音上 ;②正常清咝音VOT >0 ,而错牙合组错误音素的VOT =0。结论 :替牙期AngleⅢ类骨性反

Objective: To investigate the effects of skeletal Class III malocclusion(SCIIIM) on speech articulation in the children with mixed dentition.Methods: 38 children aged 7.5～11.5 years old with skeletal Class Ⅲ malocclusion and mixed dentition were selected in a SCIIIM group, other 40 children at similar mean age with normal occlusion were selected in a control group.The articulations of the children were examined by phoneticians and the discorded speech sounds were analysed by computerized speech lab. Results: Misarticulation(%) of z,c,s,zh,ch and sh in SCIIIM group were 27.4,46.3,34.7,6.3,9.5 and 6.8 respectively. The voice onset time(VOT) of resonant note and resonant fricative note in SCIIIM group was nought while that in the control group was positive. Conclusion: There is articulatory misfunction in most Class III malocclusion patients with mixed dentition.