Hörschgen J, Wisser W, Berger R, Lotzmann U
Abteilung für zahnärztliche Prothetik, Medizinisches Zentrum für Zahn-, Mund- und Kieferheilkunde, Philipps-Universität Marburg, Marburg, Deutschland.
Folia Phoniatr Logop. 2004 May-Jun;56(3):144-56. doi: 10.1159/000076936.
After the insertion of removable dentures for restoring partially edentulous arches, phonation is affected by many factors, of which many influences are not completely understood. The aim of this study was to investigate the influence of various construction elements of maxillary and mandibular partial dentures on the formations of plosives, nasals, lateral approximates and fricatives. Twenty-four patients were included in the study. For each patient five different test dentures were constructed. Over a period of 24 h, six digital tape records were made for each patient. By this time, the patient had worn the dentures maximally 6 h. With the help of a computer-supported frequency analysis based on the principle of fast Fourier transformation (FFT), it was possible to demonstrate the differences in phonation in regard to denture design. During the test period, the patients were asked to fill in a questionnaire on denture comfort and phonation. This study also quantifies the influence of the sublingual bar on phonation. It can be assumed that the speaker tries to retain his habitual way of articulation despite the inserted test denture. Therefore, a phonation test immediately after insertion of a new constructed partial denture should be interpreted with caution because of the assumed compensation process. The results of this study could have consequences for dental therapy plans.
在插入可摘局部义齿以修复部分牙列缺失的牙弓后，发声会受到多种因素的影响，其中许多影响尚未完全明了。本研究的目的是调查上颌和下颌局部义齿的各种结构部件对爆破音、鼻音、边音和摩擦音形成的影响。24名患者纳入本研究。为每名患者制作了五副不同的测试义齿。在24小时内，为每名患者录制了六次数字录音。此时，患者佩戴义齿的时间最长为6小时。借助基于快速傅里叶变换（FFT）原理的计算机辅助频率分析，能够证明义齿设计在发声方面的差异。在测试期间，要求患者填写一份关于义齿舒适度和发声的问卷。本研究还量化了舌下杆对发声的影响。可以假定，尽管插入了测试义齿，说话者仍试图保持其习惯的发音方式。因此，由于假定的补偿过程，在新制作的局部义齿插入后立即进行发声测试时应谨慎解释。本研究结果可能会对牙科治疗计划产生影响。
