Results A two-year follow-up revealed there occurred butment caries,luxated butment,and overlain residual root gingivitis,even on the rise,while the alveolar ridge showed no uneven absorption.

结果基牙龋、基牙松动、覆牙龈炎发生随时间呈递增趋势,而牙槽嵴无不均匀吸收。

Objective: To explore the prosthetic design and procedure of resid ual crown with complete root canal imperforation so as to solve the clinical pro blem of such cases.

探讨管完全闭锁钙化冠、临床修复设计与方法,为修复临床对这类病例提供解决方案。