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为了评价后气道间隙(PAS)变化与下颌后退手术的关系,描记13例接受经口内下颌骨升支垂直截骨术矫治下颌前突畸形患者的术前及术后1个月的标准颅颌侧位头影测量图,计算并比较PAS的宽度和面积。结果表明,术后1个月下颌骨后退的平均值是10.92mm,PAS宽度平均减少4.23mm,减少24.7%;PAS面积平均减少1.41cm~2,减少11.38%。下颌骨后退的距离与PAS面积的减小值具有密切相关性,与PAS宽度减小值不具有密切相关性。结论:双侧下颌升支垂直截骨后退手术导致了后气道间隙面积减小。如果患者同时具有超重、短颈、舌体大等其他危险因素,下颌骨后退手术可能导致睡眠呼吸暂停综合征的发生。
In order to evaluate the relationship between posterior airway clearance (PAS) and mandibular retraction surgery, 13 cases of mandibular craniocerebral malformations undergoing preoperative and postoperative one month follow-up of 13 patients undergoing mandibular ascending osteotomy with vertical osteotomy Lateral cephalometric chart, calculate and compare the PAS width and area. The results showed that the mean value of mandibular regression was 10.92mm at one month postoperatively, the average PAS width decreased by 4.23mm, a decrease of 24.7%. The average PAS area decreased by 1.41cm ~ 2, decreased by 11.38%. The distance of mandibular retraction was closely related to the decrease of PAS area, but not to the decrease of PAS width. CONCLUSION: Vertical osteotomy with bilateral mandibular ramus leads to reduction of posterior airway clearance area. If the patient also has other risk factors such as overweight, short neck, large tongue, etc., mandibular retraction may lead to sleep apnea syndrome.