caries GMAT

caries sets in at a weak point and spreads to rot the whole tooth.

龋发生在损伤点，然后扩散使整颗牙。

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、覆盖残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。

Objective: To evaluate the diagnostic efficacy of the bitewing radiograph(BWR),clinic examination(CE) and laser fluorescence examination (LF) for detection of initial posterior approximal caries .

目的:体外评价比较平行投照的牙合翼片(BWR)、激光荧光法(LF)和模拟临床检查(CE)3断方法对早期邻面龋的断水平。

Conclusions:Light cure pit and fissure sealant technique can be used to treat pit and fissure caries after the cariated dentin has been cleared up.

结论：在彻底清除龋坏牙体组织后用光固化窝沟封闭术可以做为磨牙牙 合面窝沟龋的预防治疗方法之一。

Methods To incubate the caries free permanent teeth with acid gelatinoid and/or collagenase, then to observe the ultrastructural change of root surface under scanning electron microscope .

方法将无龋恒牙分组经酸性胶液和胶原酶分别或共同孵化处理后切割制样,脱水干燥,喷金,扫描电镜观察面超微结构的变化。