EFFECT OF A 2-SOLUTION FLUORIDE MOUTH RINSE ON DEPOSITION OF LOOSELY BOUND FLUORIDE ON SOUND ROOT-TISSUE AND REMINERALIZATION OF ROOT LESIONS IN-VITRO

A constant-composition fluoride (F) titration method was used to measu re the amount of leachable F deposited on root surfaces in vitro by a 1-min rinse with a 12 mmol/l sodium fluoride (228 mu g/g F) solution o r a two-solution rinse that contained 2 mmol/l sodium fluorosilicate ( 228 mu g/g total F) and 10 mmol/l calcium chloride. The mean +/- stand ard deviations (n = 3) F uptake from the two rinse treatments were 0.7 0+/-0.24 mu g/cm(2) and 3.25+/-0.74 mu g/cm(2), respectively. In a sep arate experiment, the effects of sodium fluoride and the two-solution rinses on remineralization of root lesions were evaluated in an in vit ro pH cycling model. The results showed that the average decrease in m ineral loss (Delta Z) in the two-solution rinse group (60%) was signif icantly greater than that obtained in the NaF rinse (41%) or the contr ol (9%) group.