论文部分内容阅读
某些颌面畸形,可采用下颌下缘横行骨截开后颏前徙术得以纠正。大幅度的颏前徙时,保留前移骨段上的肌肉骨膜瓣,舌骨上肌群就会出现牵拉过度,常出现组织张力逐渐增大,导致前移骨段的不稳定和骨质吸收。若用钢丝栓结骨断端,前移的颏部骨段向下后移位的倾向就特别大。另外,若为了便于颏前移而剥离颏部软组织,就会导致更多的骨吸收;若将颏部游离后前移,骨吸收更多;若颏前移10mm、且无软组织附丽、颏部就会出现缺血性坏死。本文观察了带宽大软组织蒂的颏部大幅度前徙后的稳定性,骨吸收及软组织改变。材料及方法行下颌下缘横行骨截开,颏部骨段大幅度前徙8mm以上,病员10名(男3名,女7名,
Some of the maxillofacial deformity, mandibular mandibular edge can be cut off after the chin anterior migratory surgery be corrected. Substantial chin anterior migration, to retain the anterior muscle segment of the periosteal flap on the muscle, the hyoid muscle over stretch will occur, and often appear to increase tissue tension, leading to anterior bone segment instability and bone absorb. If the end of the wire bolt knot fracture, the anterior shift of the chin bone segment downward trend is particularly large. In addition, if in order to facilitate chin forward stripping chin soft tissue, it will lead to more bone absorption; if the chin free forward after the move, bone absorption more; if the chin forward 10mm, and no soft tissue attached to the Ministry of the chin Will appear ischemic necrosis. In this paper, we observed the stability, bone resorption and soft tissue changes of the chin of large soft tissue pedicle with large bandwidth. Materials and Methods The transverse mandibular bone was cut off at the lower edge of the mandible. The chin bone segment was greatly displaced by more than 8 mm, and 10 patients (3 males, 7 females,