Some of these agents (e.g., astringents, alkaline soap products) have proven harmful.Beneficial agents include enzymes, antiseptics, oxidizing agents, and dry dextranomer beads.

• 有些药物（如收敛剂、碱性皂制品）已证明是有害的，有些药物，如酶、抗菌剂、氧化剂和聚糖酐珠等，却是有益的。