牙醫學(三)（包括齒內治療學、牙體復形學、牙周病學等科目及其相關臨床實例與醫學倫理）題庫下載題庫

Some flavors like banana may have cross-linkage to latex allergies.

Some mint flavors may promote aphthous ulcers or cause gingival burning.

carbopol  thickens the material and prolongs the release of peroxide over time

Thickening agents: Carbopol​ (carboxypolymethylene)

The most commonly used thickening agent in bleaching materials. Its concentration is usually between 0.5% and 1.5%. This high-molecular-weight polyacrylic acid polymer offers two main advantages. 

First, it increases the viscosity of the bleaching materials, which allows for better retention of the bleaching gel in the tray. 

Second, it increases the active oxygen-releasing time of the bleaching material by up to 4 times

資料來源：Rodrigues et al., 2007