骨密度和锯的质量对截骨的精准性有显著意义的影响。
The density of a bone and the quality of saw blade had significant effect on the accuracy of bone resections.
方法： 采用前路环锯截骨、长窗减压，在牵引下植入自体长条形髂骨。
Methods: After anterior trephination osteotomy and decompression, long auto bone graft was obtained from the ilium and was grafted under traction.
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