Preoperative etching improved the effect of the varnish in severe discolored fluorineteeth.
对于重度着色氟牙症,涂膜前进行酸蚀,可明显加强涂膜的漂白作用。
2
Any accidental release of fluorine could also be an issue: fluorine is a toxic and corrosive gas and, at high concentrations, can retard plant growth and damage teeth and bones.