First Department of Oral and Maxillofacial Surgery, Osaka University, Graduate School of Dentistry, Osaka, Japan.
Unit of Dentistry, Osaka University Hospital, Osaka, Japan.
Cleft Palate Craniofac J. 2020 Dec;57(12):1410-1416. doi: 10.1177/1055665620948765. Epub 2020 Aug 18.
This study was conducted to compare the velopharyngeal function among the beagle dogs which the levator veli palatini (LVP) muscles construction has been experimentally changed.
Four groups of LVP muscle reconstruction were made (normal LVP, cut LVP, end-to-end sutured LVP, and overlapped-sutured LVP at the midline). Levator veli palatini contraction was induced by electrical stimulation or a hypercapnia condition to analyze the strength of the velopharyngeal closure using balloon with a blood pressure meter, and the electromyogram in those operated beagle dogs.
Under a hypercapnia condition, the velopharyngeal function did not differ significantly among the 4 groups in the terms of velopharyngeal pressure. The strongest closure was shown at the overlapped sutured LVP group by electrical stimulation.
The reconstruction of overlapped sutured LVP showed the most effective closure. This study suggested that the palatoplasty should be conducted along the overlapped LVP (like Furlow method).
本研究旨在比较实验性改变提腭肌（levator veli palatini，LVP）结构的比格犬的咽腔功能。
对 LVP 肌肉进行了 4 组重建（正常 LVP、切断 LVP、端端缝合 LVP 和中线重叠缝合 LVP）。通过电刺激或高碳酸血症条件来诱导提腭肌收缩，使用血压计的气囊分析腭咽闭合的强度，并对接受手术的比格犬进行肌电图检查。
在高碳酸血症条件下，4 组之间的咽腔压力无明显差异。电刺激时，重叠缝合 LVP 组的闭合最强。
重叠缝合 LVP 的重建显示出最有效的闭合。本研究表明，腭裂修复术应沿重叠的 LVP 进行（如 Furlow 法）。
