Brown W A
Br J Orthod. 1982 Oct;9(4):212-20. doi: 10.1179/bjo.9.4.212.
The varying extent of permanent tooth resorption attributable to different types of orthodontic appliances is a continuing cause for concern. This paper reviews recent researches which contribute to an improved understanding of the origin and behaviour of osteoclasts; and considers the structure and behaviour of the periodontal ligament and its relationship to the cementum and bundle bone of the tooth socket. Permanent tooth resorption is identified as a normal phenomenon. A simple explanation is offered as to why under normal circumstances the bone of the tooth socket is more likely to be resorbed than the tooth itself. With this knowledge treatment procedures can be selected which will reduce tooth resorption risks to a minimum.
不同类型正畸矫治器导致恒牙吸收程度各异，这一直令人担忧。本文回顾了近期的研究，这些研究有助于更好地理解破骨细胞的起源和行为；并探讨了牙周膜的结构和行为及其与牙槽骨牙骨质和束状骨的关系。恒牙吸收被认为是一种正常现象。本文还简要解释了在正常情况下牙槽骨为何比牙齿本身更容易被吸收。基于这些认识，可以选择将牙齿吸收风险降至最低的治疗方法。
