Identically severe saliva penetration occurred three months after root canal fillings with a ca. 3mm thick IRM restoration as with teeth that were left open coronally.

• 所以如果根管充填后，牙冠直接用3毫米厚的IRM暂封材暂封，那么三个月后，就可以发生比较严重的唾液微渗漏。