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矢状和垂直切开下颌升支是手术矫正下颌畸形的方法,这两种方法都可在口内进,行并用螺丝钉固定骨切开处以保证功能稳定。这种骨切开固定法不需要或减少颌间固定的时间,并可通过打开下颌或下颌升支骨切开处,重新调整咬(牙合)。矢状切开下颌支有正常咬合的实验研究表明,利用螺丝钉固定后,仍经常出现髁状突错位,尸体研究表明这种错位达12mm。用X线片对髁状突错位进行研究,表明髁状突有移位、形态结构的改变。但由于髁状突局部解剖复杂,颞下颌关节的个体差异及X线片失真,因此,术后髁状突错位的发生率在13%和72%之间。Kundcrt等(1980)在颞下颌关节的侧向斜投影中证实了髁状突受力部分经常出现向内的
Sagittal and vertical incision mandibular ascending is the surgical correction of mandibular deformity, both methods can be in the mouth into and out, and screw fixation of bone incision to ensure functional stability. This bone incision fixed method does not require or reduce the intermaxillary fixation time, and by opening the mandibular or mandibular lumbar incision, readjust the bite. Sagittal resection of mandibular branch with normal occlusion of the experimental study shows that the use of screws fixation, the condylar often appear dislocation, cadaver studies have shown that this up to 12mm. X-ray films on the condylar dislocation research shows that the condyles have a shift, the morphological changes. However, because of the complex anatomy of the condyle, the individual differences in temporomandibular joint and the X-ray distortion, the incidence of postoperative condylar dislocation was between 13% and 72%. Kundcrt et al. (1980) demonstrated in lateral oblique projection of the temporomandibular joint that condylar forces often appear inward