Enhanced Root Fluoride Uptake by Monocalcium Phosphate Monohydrate Gels

Abstract

Application of monocalcium phosphate monohydrate (MCPM) gel, which produces small amounts of dicalcium phosphate dihydrate in enamel, was previously shown to increase the enamel reactivity with fluoride (F). This study was conducted to determine whether the MCPM gel treatment is also effective in enhancing F uptake by root surfaces of human teeth. The results show that samples receiving daily treatments with MCPM gel for 10 min followed by immersion in a 1-ppm F solution for 5 days acquired a significantly greater amount of F compared to the controls which had the same exposure to the F solution. Because the F solution was undersaturated with respect to calcium fluoride (CaF₂), the F incorporated into the root is apparently apatitic and not CaF₂. This experimental treatment should be feasible in the clinical situation since only a short treatment time was required and delivery of the MCPM gel to specific sites was relatively easy.

Tooth-bound Fluoride and Dental Caries

“…The precipitation of minerai should reduce the porosity of the enamel, which, as noted above, is desirable in terms of increasing the resistance against demineralization. Under comparable conditions, root cementum acquired even greater amounts of F. However, a portion of this F can be washed out by a calcium phosphate solution saturated with FAp (Takagi et al, 1989), suggesting that this more labile form of F is adsorbed onto the crystal surfaces and is not in apatitic form (Laufer et al, 1981). These studies showed that the firmly bound F content of teeth can be significantly increased by immersion in a F-containing calcium phosphate solution for several days.…”

Effect of a Two-Solution Fluoride Mouth Rinse on Deposition of Loosely Bound Fluoride on Sound Root Tissue and Remineralization of Root Lesions in vitro

“…Takagi et al [1990] reported that the mean F content in the outer 10 pm of root dentin increased by about 2,570 pg of F per gram of dentin (ppm) when the specimens were immersed for 5 days in a pH 7 calcium phosphate-containing solution that also contained 52.6 pmol/1 (1 ppm) of F. Approximately 900 ppm of dentin of the incorporated F was labile, i.e., leachable into a solution similar to the washing solution used in the present study. If in the present study the F depo sition were estimated by root F biopsy instead of by F wash ing, the F deposition produced by a 1-min application o f the Na2SiF,,-CaCl2 two-solution rinse (3.25 pg/cm2) and the The means (± SD) o f any two groups connected by a vertical line are not significantly different (p>0.05; n = 35).…”

Μελέτη Της Πρόσληψης Από Βόεια Αδαμαντίνη Του Φθορίου Που Απελευθερώνεται Από Εμφρακτικά Υλικά

“…Attin T., Buchalla W., Siewert C., Hellwig E. (1999): Fluoride release / uptake of polyacid modified resin composites (compomers) in neutral and acidic buffer solutions. J Oral Rehabil, 26 (5), 388-393.…”