Ahn Jaemyung, Kim Gunjong, Kim Young Ho, Hong Jongrak
Department of Oral and Maxillofacial Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangnam-gu, Seoul 135-710, Republic of Korea.
Department of Orthodontics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangnam-gu, Seoul 135-710, Republic of Korea.
J Craniomaxillofac Surg. 2015 Jan;43(1):11-6. doi: 10.1016/j.jcms.2014.10.002. Epub 2014 Oct 15.
The purpose of this study was to compare the articular structures and vowel sounds of patients with mandibular prognathism before and after bilateral sagittal split ramus osteotomy (BSSRO). Eight patients who underwent BSSRO to correct mandibular prognathism were selected for inclusion in this study. All patients were asked to read short words (vowels), and these sounds were recorded. Every utterance was repeated twice in four different sessions before the operation and at 6 weeks, 3 months, and 6 months after the operation. The data were analysed using Praat (ver. 5.1.31), and the formant frequencies (F1, F2) of the eight vowels were extracted. PlotFormant (ver. 1.0) was used to draw formant diagrams. The F1 and F2 of front-low vowels were reduced after BSSRO, and the articulating positions of the patients shifted in a posterior-superior direction after the procedure. Additionally, the area of vowel articulation was dramatically reduced after BSSRO but increased slowly over time.
本研究的目的是比较双侧矢状劈开下颌支截骨术（BSSRO）前后下颌前突患者的关节结构和元音发音。选取8例行BSSRO矫正下颌前突的患者纳入本研究。所有患者被要求朗读短单词（元音），并记录这些声音。在手术前以及术后6周、3个月和6个月的四个不同时间段，每个发音均重复两次。使用Praat（版本5.1.31）分析数据，提取八个元音的共振峰频率（F1、F2）。使用PlotFormant（版本1.0）绘制共振峰图。BSSRO后前低元音的F1和F2降低，术后患者的发音位置向后上方移动。此外，BSSRO后元音发音区域显著减小，但随时间缓慢增加。
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