Fluoride and Mutans Streptococci in Plaque Grown on Glass Ionomer and Composite

Abstract

The aim of this study was to compare the levels of fluoride and mutans streptococci in plaque grown on glass ionomer (Ketac-Fil) and composite (Silar) restorations in vivo. From tunnels left under the brackets bonded either with glass ionomer or composite, 14-day-old plaque samples were collected 14, 28, and 42 days after bonding. For glass ionomer the mean counts of mutans streptococci in plaque were 0.5 × 10³, 6.7 × 10³, and 8.8 × 10³ CFU at the first, second, and third collection, respectively, whereas for composite restorations the corresponding values were 32.1 × 10³, 14.6 × 10³, and 120.6 × 10³ CFU. For glass ionomer the mean concentrations of fluoride were 19,985, 5,788, and 5,019 ppm at first, second, and third collections of 14-day-old plaque samples, respectively, whereas for composite restorations the mean concentrations of fluoride were about 200 ppm throughout the study. The results show that the fluoride level in plaque growing on glass ionomer is much higher than that on composite restorations which seems to affect the level of mutans streptococci in dental plaque.

Surface modification of stainless steel by plasma-based fluorine and silver dual ion implantation and deposition

“…The metal-fluoride complexes are also responsible for fluoride inhibition of protontranslocating F-ATPases and are thought to mimic phosphate to form complexes with ADP at the reaction center of enzymes. Indeed, ATPase plays an important role in the maintenance of intracellular pH by pumping out protons and in the inhibition of the enzyme that disrupts the bacterial metabolism and aciduric capability of Streptococcus mutans 17,[36][37][38] .…”

Comparative study of topical effects of probiotics with a commercial fluoride tooth paste in reducing dental caries in patients with higher salivary streptococcus mutans levels

“…14 Berg et al and Forss et al have found that the plaque adjacent to fluoride-releasing glass ionomers demonstrate lower levels of Streptococcus mutans. 15,16 Yoshiara et al found that the long-term use of a fluoride mouth rinse might contribute to the reduction of mutans streptococci. 17 Comparison between fluoride and probiotic group were statistically insignificant both the groups yielding similar results.…”

Evaluation of Compressive Strength for a Combination of Glass Ionomer Cement and Antibiotics

“…9 Glass ionomer cement presents a broad anticariogenic effect and is of great value in preventing secondary caries, even under conditions of a high caries risk. 10 This property made glass ionomer cement as the choice of restorative material for atraumatic restorative technique. However, whether the caries-inhibitor influence is sufficient to completely arrest the caries process is still doubtful.…”

“…10 Freshly-mixed glass ionomer cements are antimicrobial against S. mutans and the mechanism of action is probably because of both fluoride and pH. 23 One study showed that there was no antibacterial activity despite the presence of fluoride in the agar around the set materials.…”