The objectives of this study were to investigate the effect of application times on fluoride (F) uptake by sound enamel exposed in vitro to APF gels. Two groups of 12 teeth each were treated with one of the following 1.23% APF gels: MinuteGelTM (gel A) and Nupro® (gel B). The F treatment times were 1, 2, and 4 min and the F concentrations and enamel biopsy depths were determined using an acid-e...

C o n t r a r y to previous reports, commercially available 1000-nm latex beads were found to be labelable with 12sI, yielding a product that retained its radiolabel on storage at 4~ and when incubated in tissue-culture media. This finding permitted a radiochemical method to measure phagocytic uptake of latex particles by rat peritoneal macrophages cultured in vitro, and a direct compar i son w...