Kajander K C, Uhland R, Ophaug R H, Sather A H
Angle Orthod. 1987 Jan;57(1):70-6. doi: 10.1043/0003-3219(1987)057<0070:TFIOB>2.0.CO;2.
Neutral and acidified sodium fluoride solutions were topically applied to enamel etched in a manner typical for orthodontic bonding procedures. Enamel fluoride levels were greater with the acidified solutions.