AIM: To construct a three dimensional finite element model of the anterior teeth with its alveolar bone absorbed. The model includes enamel, dentin, cementum, periodontal membranes, cancellous bone, cortical bone, and so on. 目的:建立下颌前牙不同程度牙槽骨吸收后的釉质、牙本质、牙骨质、牙周膜、松质骨、皮质骨等组织的三维有限元模型。