[Pathogenesis and classification of tooth resorption]

Tooth resorption is an idiopathic destructive disease of dental hard tissues. The etiology and pathogenesis remain obscure. It has various manifestations and can be commonly classified as internal tooth resorption and external root resorption on the basis of the resorptive lesion sites. There have been many attempts to make further classification based upon the pathological manifestations in recent years. Radiographic examination is an effective tool to assist in the diagnosis. There are few systematic researches on tooth resorption worldwide, most of which are case reports. This review elaborates on the research progress of tooth resorption from aspects of pathogenesis and classification.牙吸收是一种特发性牙体硬组织破坏性疾病，病因及发病机制不甚明确，临床表现多样，以往多以牙内吸收和牙根外吸收来表述，近年根据病变的临床或病理表现及特征进一步划分了类别。牙吸收的临床和影像学表现是诊断的重要依据。国内外有关牙吸收的系统性研究较少，报道多以病例报告为主。本文将从牙吸收的发生机制与分类角度对牙吸收的研究进展进行综述。.