The invention includes methods for reducing or preventing the staining capacity of a compound to a tooth in a mammalian oral cavity, which includes affixing to the tooth surface a degradable film. The film comprises a starch polymer or copolymer that is formed by crosslinking a starch. The film degrades in the oral cavity within about 1 minute to about 70 minutes after affixation. In some embodiments, it may be preferred the crosslinking occurs in the presence of at least one (poly)carboxylic acid. It may be preferred that the starch selected is a retrograde starch, a starch that is chemically or physically modified to be amylase resistant or a starch that is derived naturally but exhibits amylase resistance.
本发明包括降低或防止化合物对哺乳动物口腔中的牙齿染色能力的方法,其中包括在牙齿表面粘贴一层可降解薄膜。薄膜由淀粉聚合物或共聚物组成,淀粉聚合物或共聚物是通过淀粉交联形成的。粘贴后,薄膜会在口腔内约 1 分钟至约 70 分钟内降解。在某些实施方案中,交联最好在至少有一种(聚)
羧酸存在的情况下进行。所选淀粉最好是逆淀粉、经
化学或物理改性后具有抗
淀粉酶性的淀粉或天然提取但具有抗
淀粉酶性的淀粉。