To provide agents for gum activation, agents for gum normalization and agents for promoting gum restoration which are capable of activation of gingival cells to restore the gum to normal conditions in a gum with inflammation and/or bacterial infection.SOLUTION: Provided herein are an agent for gum activation, an agent for gum normalization and an agent for promoting gum restoration applicable to a gum with inflammation and/or bacterial infection, which comprise a phosphocholine group-containing polymer. The phosphocholine group-containing polymer is preferably a 2-methacryloyloxyethyl phosphorylcholine/butyl methacrylate copolymer. The activator is preferably in the form of liquid dentifrice, dental rinse, toothpaste or mouth wash.SELECTED DRAWING: None【課題】炎症及び／又は細菌感染を伴う歯肉において、歯肉細胞を活性化して、歯肉を正常な状態に回復させ得る、歯肉の活性化剤、歯肉の正常化剤、及び歯肉の修復促進剤の提供。【解決手段】ホスホコリン基含有重合体を含む、炎症及び／又は細菌感染を伴う歯肉の活性化剤、歯肉の正常化剤、及び歯肉の修復促進剤。該ホスホコリン基含有重合体は、２－メタクリロイルオキシエチルホスホリルコリン・メタクリル酸ブチル共重合体であることが好ましい。該活性化剤の形態は、液体歯磨剤、液状歯磨剤、練歯磨剤、又は洗口液であることが好ましい。【選択図】なし
