There are two purposes of this experiment is to use the same, a cementation agent bond 3 different materials full crown, observe different materials of the full crown edge microleakage situation.
本实验有两个目的，一是使用同种粘结剂粘结三种不同瓷全冠，观察粘结后瓷全冠边缘的微渗漏情况。
2
OBJECTIVE: To review the research progress on ceramic crown and related ceramic splicing agent.