Patients with severe maxillary hypoplasia secondary to craniofacial dysplasia present a challenge to the craniofacial surgeon. Maxillary distraction presents a promising tool to treat these patients more successfully. Fifteen patients aged 12 to 20 years with craniofacial dysplasia and maxillary retrusion were treated with two different techniques after complete Le Fort I osteotomy: one group underwent face mask protraction (2 patients), and the other group underwent rigid external distraction (13 patients). Cephalometric evaluation was performed before and after distraction. Rigid external distraction appeared to be superior to face mask protraction. Maxillary retrusion was fully corrected in this group. The path of maxillary positioning was well controlled by changing the traction force vector. Distraction osteogenesis has certainly improved treatment of these patients.

译文

:继发于颅面发育不良的重度上颌骨发育不全的患者对颅面外科医师提出了挑战。上颌骨牵张术是一种有望更成功地治疗这些患者的有前途的工具。在完成Le Fort I截骨术后,对15名年龄在12至20岁的颅面不典型增生和上颌骨退缩的患者进行了两种不同的技术治疗:一组进行了面罩牵引(2例),另一组进行了刚性的外部牵引(13例)。在分心之前和之后进行头颅测量评估。刚性的外部牵引力似乎比面罩牵引力要好。该组上颌骨完全退缩。通过改变牵引力矢量可以很好地控制上颌定位的路径。分心成骨术无疑改善了这些患者的治疗。

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