Riccio C, Piccirillo P
Arch Stomatol (Napoli). 1989 Oct;30(4):699-703.
The AA. discuss the problem of composition of root canal sealers; they precise the role and utility of single ingredients. They conclude that root canal sealers contain many unnecessary or harmful compoundings, as paraformaldehyde; so it's necessary to reduce the amount of root canal sealers introduced in the endodontic system.
作者们讨论了根管封闭剂的成分问题；他们明确了单一成分的作用和用途。他们得出结论，根管封闭剂含有许多不必要或有害的成分，如多聚甲醛；因此有必要减少引入牙髓系统的根管封闭剂的用量。
