Schendel S A, Oeschlaeger M, Wolford L M, Epker B N
J Maxillofac Surg. 1979 May;7(2):116-24. doi: 10.1016/s0301-0503(79)80023-5.
This study was undertaken to evaluate the radiographic changes in the static velopharyngeal mechanism following total maxillary advancement. Records of 21 patients treated for maxillary retrusion were evaluated. Two groups were present: 13 non-cleft patients and 8 cleft-lip patients. The findings demonstrate an anatomical change in the velopharyngeal mechanism following total maxillary advancement. A similar change occurred in both groups; however, the magnitude is differed. The angle of the soft palate to hard palate increased with surgery (2 degrees per mm. advancement noncleft and 1 degree per mm. cleft). An increase in soft palate length was also seen (.5mm. per mm. advancement non-cleft and .4 mm. per mm. cleft). A pharyngeal need ratio prediction method was established (pharyngeal depth/soft palate length). A ratio of .68--.84 in this study was observed. A ratio greater than one was found to indicate probable velopharyngeal incompetence.
本研究旨在评估全上颌前徙术后静态腭咽机制的影像学变化。对21例接受上颌后缩治疗的患者记录进行了评估。分为两组：13例非腭裂患者和8例唇裂患者。研究结果表明全上颌前徙术后腭咽机制发生了解剖学变化。两组均出现了类似变化；然而，变化程度有所不同。软腭与硬腭的角度随手术增加（非腭裂患者每推进1毫米增加2度，腭裂患者每推进1毫米增加1度）。软腭长度也增加（非腭裂患者每推进1毫米增加0.5毫米，腭裂患者每推进1毫米增加0.4毫米）。建立了一种咽需求比率预测方法（咽深度/软腭长度）。本研究中观察到的比率为0.68至0.84。发现比率大于1表明可能存在腭咽功能不全。
