| abstract |
It is possible to form a film of a powder suitable for the color tone of a tooth in a short time, which is preferable for forming a film having a high hardness and extremely low solubility in acid in a short time, by spraying the powder onto the tooth surface, A hydroxyapatite powder which is fired at 600 to 1350 DEG C in an inert gas atmosphere and a hydroxyapatite powder which is fired at 600 to 1350 DEG C in order to provide a film forming powder using hydroxyapatite containing a hydroxyapatite and a color- Lt; 0 > C, or a powder obtained by applying mechanical energy to plasma irradiation or plasma irradiation to the hydroxyapatite powder, or a powder for forming a film in which a color adjusting agent is added to the hydroxyapatite powder. |