THE STUDY OF THE STOMATOGNATHIC DISFUNCTION OF THE PERSON WITH ANATOMICAL DEFECTS.

本研究旨在观察下颌后移术后口咽区的功能和形态学变化。我们使用了7名接受下颌骨后移手术和手术劈开截骨术的受试者。3名受试者在手术前接受了舌缩小术。分别于运动前、运动后即刻、运动后即刻拍摄下颌静息位头颅X线片和功能运动时的X线电影片（3至5个月）和长期后本文报告一例典型下颌后移病例，术前及术后短时间内，下颌静息位舌面积比增加3.3%，咽前后径减小2.0mm，舌高增加3.5mm，术后长期保持不变。这些变化可能是为了使舌头适应手术切除的口腔而进行的一些调整。 ...更多信息 ity。X线片显示术后吞咽时间有延长的趋势，伸舌功能在术后较长时间内恢复。本文报告一例典型的下颌后移患者行部分舌切除术后，通过头颅X线片观察，避免了相对巨舌症的发生，并保持了舌与口腔的适当比例。咽部前后径短时间内缩小，长时间后恢复原径。舌高度没有像单独进行下颌后移手术的病例那样升高。这些影响可能是由于舌头缩小。X线片显示术后吞咽时间较术前短。吞咽和发音时出现的异常伸舌现象消失，术后短期和长期舌运动功能良好。少

This study was conducted to observe the functional and morphological changes in oral and pharyngeal area following the mandibular set-back surgery. We utilized seven subjects who underwent mandibular set-back surgery with surgical spilit osteotomy. Three subjects had received surgical tongue reduction prior to thier surgery. Cephalograms at mandibular rest position and cinefluorograms during functional movements were taken respectively at before, short after (3 to 5 months) and long after (1 year to 4 years 4 months) the surgery.The findings of a typical mandibular set-back case are as follows.Compairing before and short after the surgery, cephalograms (mandibular at rest position) showed the area ratio of tongue to oral cavity gained 3.3%, the anteroposterior phyaryngeal dimention reduced 2.0mm and the tongue height increased 3.5mm, and these changes remained even at long after the surgery. These changes might be some adjustments to fit the tongue into the surgically nallowed oral cav … More ity. Cinefluorograms showed the elongation tendency of the swallowing duration and the reoccurences of the tongue thrust at long after the surgery. This suggest that relative macroglossia might cause undesirable effects on the functional tongue movements.The findings of a typical mandibular set-back case with partial glossectomy are as follows.From the cephalogram observation the relative macroglossia condition was prevented and adeqate tongue to oral cavity ratio was maintained after the surgery. The anteroposterior dimention of pharyngeal was reduced at short after but recovered original dimention at long after. The tongue height did not rise as high as the cases which underwent mandibular set-back surgery alone. These effects might because of the tongue reduction. The cinefluorograms showed the swallowing duration become shorter at short after compairing before the surgery. The abnormal tongue thrust that occured during deglutition and articulation was disappeared and good functional tongue movements were observed both at short and long after the surgery. Less