使用牵张成骨技术对犬下颌弓扩弓的实验研究。
An experimental study of mandibular arch widening in the dog using distraction osteogenesis.
作者信息
Hollis B J, Block M S, Gardiner D, Chang A
机构信息
LSU School of Dentistry, New Orleans, LA 70119, USA.
出版信息
J Oral Maxillofac Surg. 1998 Mar;56(3):330-8. doi: 10.1016/s0278-2391(98)90110-0.
PURPOSE
This study evaluated the amount of skeletal and dental widening of the mandible in the dog produced by using a tooth-borne distraction device.
MATERIALS AND METHODS
Four adult mongrel dogs had osteotomies performed in the parasymphysis region and had a tooth-borne distraction appliance placed to widen the mandible 10 mm. The interarch distance between the canines and between the fourth premolar teeth, as well as between the intrabony markers, was compared.
RESULTS
The canine teeth moved 95% of the distraction device movement, whereas the bone widened 55% of the distraction device movement. Histological evaluation showed woven bone formation within the distraction gap.
CONCLUSION
This study shows that a tooth-borne mandibular widening device will move the teeth significantly more than the bone.
目的
本研究评估使用牙支持式牵张装置使犬下颌骨骨骼和牙齿加宽的量。
材料与方法
对4只成年杂种犬在双侧下颌骨联合处进行截骨术，并放置牙支持式牵张矫治器以使下颌骨加宽10毫米。比较尖牙之间、第四前磨牙之间以及骨内标记物之间的牙弓间距离。
结果
尖牙移动了牵张装置移动量的95%，而骨加宽了牵张装置移动量的55%。组织学评估显示牵张间隙内有编织骨形成。
结论
本研究表明，牙支持式下颌骨加宽装置使牙齿移动的幅度明显大于骨。
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