Objective. To investigate the influence of reproduction of different thickness and palatal rugae materials on complete dentures speech using Computerized Speech Lab (CSL) (spectrogram). Materials and Methods. Three completely edentulous male patients (aged 50–60 years) were selected for reading a paragraph. Twelve upper dentures were constructed, four for each patient. The patients' speech groups were divided into five groups, Group I: patients without dentures; Group II: patients rehabilitated with conventional acrylic dentures; Group III: patients with conventional acrylic dentures with rugae reproduction; Group IV: patients with dentures with metallic framework of minimal thickness and direct ragged metallic palatal surface at rugae area; Group V: patients with dentures with palatal rugae constructed from resilient acrylic resin material with thickness less than conventional denture. Speech samples were recorded after insertion of each denture for groups using Computerized Speech Lab (CSL) (spectrogram). The sounds selected were lingopalatal /s/z/sh/t/d/ and /l/. Results. Group III produced high mean significant difference with /sh/t/ sound. For Group IV, the difference was noticed with /s/z/sh/t/ and /d/ sounds, while for Group V the difference was shown with /z/l/ sound (P < 0.05). Conclusion. It is recommended to reproduce the rugae area in complete denture because the phonetic quality of complete denture with rugae is superior to the conventional denture.
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机译：目的。使用计算机语音实验室（CSL）（频谱图），研究不同厚度和金属的复制对完整义齿语音的影响。材料和方法。选择三名完全无牙的男性患者（年龄在50-60岁之间）阅读一段。构造了十二个假牙，每个患者四个。患者的言语组分为五组，第一组：无假牙的患者；第二组：使用常规丙烯酸假牙修复的患者；第三组：患有皱纹繁殖的传统丙烯酸假牙患者；第四组：假牙患者的金属框架厚度最小，在皱纹区域直接有参差不齐的金属metallic表面；第五组：patients义齿患者由弹性丙烯酸树脂材料制成，厚度小于传统义齿。使用计算机语音实验室（CSL）（频谱图）将每个义齿插入组后记录语音样本。选择的声音是舌下/ s / z / sh / t / d /和/ l /。结果。第三组与/ sh / t /声音的平均差异显着。对于第IV组，差异以/ s / z / sh / t /和/ d /声音显示，而对于第V组，差异以/ z / l /声音显示（P <0.05）。结论。建议使用全口义齿复制全口义齿区域，因为全口义齿与全口义齿的语音质量优于常规义齿。
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