龋病晚期致牙冠大部甚至全部毁坏的后牙，往往由于修复体不易固位、牙合关系无法重建，而被医师拔除作义齿或人工牙根种植修复。但义齿常缺少真牙的感觉和功能，人工牙根种植费用高，且稳定性欠满意，故作者认为，要恢复生理感觉，利用残冠及牙根作固定修复具有更多优越性。作 Posterior deciduous caries caused most or even all of the destruction of the posterior teeth, often because the prosthesis is not easy retention, occlusal relationship can not be reconstructed, and was removed by a dentist prosthesis or artificial root prostheses repair. But the denture often lack the sense and function of true teeth, artificial tooth root planting cost is high, and the stability is not satisfied, so the author thinks, to restore the physical sensory, the use of residual crown and root for fixed repair has more advantages. Make