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.

• 结果基牙根龋、基牙松动、覆盖残根牙龈炎的发生随时间呈递增趋势,而牙槽嵴则无不均匀吸收。