Abstract | PURPOSE: METHODS: Five consecutive patients with Crouzon syndrome underwent Le Fort III osteotomy with midface advancement using a modified external device with elastic distraction. The distraction system consists of a rigid external distractor, nickel-titanium shape memory alloy spring, and bone-borne traction hooks. The midface advancement was initiated with the bony anchorage around the nasomaxillary buttress at the level between occlusal plane and infraorbital margin. The device was activated at a rate of 1 to 1.5 mm per day by the length of spring. The skeletal changes were analyzed by cephalometric and computed tomographic measurement. RESULTS: All the patients achieved improvements in midface appearance, obstructive sleep apnea, exophthalmos, and occlusion. No complications occurred during this procedure. After the distraction, 1 patient developed an open bite that was corrected by a definitive orthognathic surgery. Cephalometric and computed tomographic measurement analysis showed a differential advancement of midface with more at the occlusal level than the orbital level. In addition, midface suture and bone remodeling was also observed in growing patient. CONCLUSIONS: Our modified external device with elastic distraction offers an alternative method to achieve midface advancement in patients with Crouzon syndrome.
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Authors | Haizhou Tong, Lei Liu, Xiaojun Tang, Tao Song, Ningbei Yin, Zhiyong Zhang, Zhenmin Zhao |
Journal | The Journal of craniofacial surgery
(J Craniofac Surg)
Vol. 28
Issue 6
Pg. 1573-1577
(Sep 2017)
ISSN: 1536-3732 [Electronic] United States |
PMID | 28060091
(Publication Type: Journal Article)
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Topics |
- Adolescent
- Child
- Craniofacial Dysostosis
(pathology, surgery)
- Equipment Design
- Face
(pathology, surgery)
- Female
- Humans
- Male
- Osteogenesis, Distraction
(instrumentation, methods)
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