...[ funeral costume in white ] 吊丧的冠服 [ crown of a tooth ] 牙齿露出齿龈的部分 [ flick cap to express joy；congratulate each other over their new appointments and honours ] 弹除冠尘，以示庆幸。
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First, I'll make a small opening in the top (crown) of the tooth to expose the infected pulp..
首先，我要在牙齿的顶端(牙冠)开一个口，使受感染的牙髓暴露出来。
When a tooth is fractured, has a large old filling, or is severely damaged by decay, your dentist may recommend the placement of a crown or cap.
如果您的牙齿裂开、有一个很大的填充体或者因龋齿而严重受损，您的牙医可能建议您安装牙冠或牙套。
After perfect root canal therapy to the residual root and crown of the front tooth, it is the main repair method to utilize a post and core crown at present.
前牙残根残冠经过完善的根管治疗后，利用桩核冠修复在目前是主要的修复方法。
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