J Conserv Dent Endod. 2024 Jun;27(6):577-583. doi: 10.4103/JCDE.JCDE_167_24. Epub 2024 Jun 6.
ABSTRACT
CONTEXT AND AIMS: This study evaluated the effect of calcium silicate and sodium phosphate (CSSP) dentifrice and serum on the surface of enamel bleached with hydrogen peroxide (H2O2).
MATERIALS AND METHODS: A total of 160 bovine enamel slabs were bleached with 35% H2O2 and treated with sodium fluoride (NaF) dentifrice-GI, CSSP dentifrice-GII; CSSP dentifrice + CSSP serum-GIII, or NaF dentifrice + NaF gel-GIV. The dentifrices were applied using a brushing machine three times daily for 7 days. After brushing, sodium phosphate gel and CSSP serum were applied. The microhardness (KNH, n = 14), surface roughness (Ra, n = 14), energy dispersive spectroscopy (n = 6), and scanning electron microscopy (n = 6) were assessed at t0 (before bleaching), t1 (after bleaching), and t2 (after postbleaching treatments).
STATISTICAL ANALYSIS USED: The data were subjected to a two-way analysis of variance and Bonferroni’s test.
RESULTS: The KNH decreased at t1 (P < 0.001) but recovered at t2 for all treatments, although only GII showed restored baseline values (P = 0.0109). The surface roughness increased at t1 (P < 0.001) and reduced at t2 (P < 0.001) for all groups, with no significant differences among groups. Enamel composition and morphology did not differ after the treatments, except for silicon accumulation in GIII.
CONCLUSIONS: Postbleaching treatment with CSSP dentifrice and serum yielded superior remineralizing effects on bleached enamel.
PMID:38989498 | PMC:PMC11232766 | DOI:10.4103/JCDE.JCDE_167_24
