在根管治疗中,大多数根管形态都是不规则的,通常没有一个完全适合根管形态的、密合的固体或半固体的根管充填材料。无论银尖或牙胶尖皆不理想,因为它仍留有空隙,根管封闭剂要能达到正确和持久地充满于空隙中,则根充之固体部分要占绝大多数,封闭剂只能维持于最小量。 In root canal therapy, most of the root canal morphology is irregular, and usually there is not a root canal filling material that fits well with the root canal and is in close contact with the solid or semi-solid root canal. Regardless of the silver tip or gutta percha are not ideal, because it still leaves a gap, root canal sealer to be able to achieve correct and lasting full of voids, then the solid part of the root to account for the vast majority of blocking agent can only Maintain a minimum amount.