Paulus Christian
Orthod Fr. 2017 Mar;88(1):15-23. doi: 10.1051/orthodfr/2016040. Epub 2017 Feb 23.
Tooth-arch discrepancy is a disproportion between dental volume and bone base. Extraction therapy can be a solution in case of excessive tooth volume and insufficient basal bone length. Techniques including bone distraction popularized by Ilizarov in the fifties allow the increase of the basal arch length in the maxilla as well as in the mandible.
We will describe the procedure of this dental arch length augmentation since the reflection about the therapeutic plan until the sufficient arch length is obtained and describe the indications of this orthodontic and surgical treatment in case of dental crowding, buccal and labial inclination and functional problems.
Distraction is an interesting technique to be considered for the management of macrodontia that allows to get enough basal bone lenght to reach the therapeutic goal.
牙弓差异是指牙量与骨基量之间的不均衡。在牙量过大而基骨长度不足的情况下，拔牙治疗可能是一种解决方案。包括五十年代由伊里扎罗夫推广的骨牵引技术在内的一些技术，可以增加上颌和下颌的基弓长度。
我们将描述这种牙弓长度增加的操作过程，从治疗方案的思考到获得足够的弓长度，并描述在牙齿拥挤、颊侧和唇侧倾斜以及功能问题的情况下这种正畸和外科治疗的适应症。
牵引是一种值得考虑用于处理巨牙症的有趣技术，它能够获得足够的基骨长度以实现治疗目标。
