两种可摘局部义齿戴用前后语音效果的对比研究

目的：对上颌肯氏I类牙列缺损可摘局部义齿戴用前后的临床语音适应效果做出客观评价。方法：对30例上颌肯氏I类牙列缺失患者在义齿初戴前、初戴时、初戴后的1、2、4、8用语音变化规律进行分析。结果：辅音／j／：在塑料组，在初戴后2．4、8周与初戴时F2有统计学差异（P〈0．05）；在初戴时与初戴前相比F2也有统计学差异（P〈0．05）。初戴后1周也有统计学差异（P〈O．05）；两组同一时间内比较，/j/的F2在初戴时有统计学差异（P〈0．01）。／sh／音：在初戴时与初戴后2、8周F1有统计学差异（P〈0．05）。/z／音：在塑料、铸造两组中，F1、F2在初戴前、后2、4、8周均有统计学差异（P〈0．05）。结论：可摘局部义齿基托厚度主要影响的发音部位是硬腭前部，在临床上，减少硬腭区基托厚度，对临床修复有较好的指导意义。

Comparative Study of Acoustic Changes before and after Restoration with Two Different Removable Partial Dentures

Objective： To evaluate clinical speech adaptation effect of maxillary Kennedy I dentition defect before and after wearing removable partial dentures. Methods： Analysis the phonetic variation of 30 maxillary Kennedy I dentition defect patients before restoration, during restoration and wear restoration after one, two, four, and eight weeks. Results： Consonant/j/, which showed statistical difference （P〈0.05） ofF2 between during and before restoration; and between two weeks, four weeks, eight weeks and during restoration in plastic base group. It also showed statistical difference （P〈0.01） between during and one week after restoration （P〈0.05） of F2 compared at the same time between the two groups. About/sh/, there were statistical difference （P〈0.05） ofF2 between during and after two weeks and eight weeks restoration; consonant： /z/, showed statistical difference （P〈0.05） of F1, F2 between during and before restoration; and between two weeks, four weeks, eight weeks and during restoration both in plastic base and metal group. Conclusion： The thickness of removable partial denture affects the anterior hard palate most while it has no influence on other parts. In clinic, the recovery of speech function can be speeded up by reducing the thickness of hard palate base.