Effects of bleaching agents on surface roughness of filling materials

Abstract

The aim of this study was to use a non-tactile optical measurement system to assess the effects of three bleaching agents' concentrations on the surface roughness of dental restoration materials. Two composites (Grandio, Venus) and one glass ionomer cement (Ketac Fil Plus) were used in this in vitro study. Specimens were treated with three different bleaching agents (16% and 22% carbamide peroxide (Polanight) and 38% hydrogen peroxide (Opalescence Boost)). Surface roughness was measured with an optical profilometer (Infinite Focus G3) before and after the bleaching treatment. Surface roughness increased in all tested specimens after bleaching treatment (p<0.05). Our in vitro study showed that dental bleaching agents influenced the surface roughness of different restoration materials, and the restoration material itself was shown to have an impact on alteration susceptibility. There seemed to be no clinical relevance in case of an optimal finish.

Hydrogen peroxide bleaching induces changes in the physical properties of dental restorative materials: Effects of study protocols

“…In this study, no significant substance loss was observed after bleaching with the different protocols, which is consistent with the previous research . In agreement with previous studies, bleaching produced a rougher surface of the restorative materials tested, except for the ceramic. Moreover, a significant decrease in flexural strength was found for the polyacid‐modified composite after bleaching.…”

“…In agreement with previous studies,17,18 bleaching produced a rougher surface of the restorative materials tested, except for the ceramic. Moreover, a significant decrease in flexural strength was found for the polyacid-modified composite after bleaching.…”

In‐office bleaching efficacy on stain removal from CAD/CAM and direct resin composite materials

“…It could be of interest to evaluate the effect of a 40‐minute application time with this highly concentrated in‐office bleaching product and compare it to the maximum application time of 1 hour. Evaluations of surface roughness and gloss change resulting from the use of hydrogen peroxide could support the limited effect of bleaching on the surface morphology, as seen in the literature …”

What adverse effects does tooth-whitening have on dental restorations?

“…There were ten studies that looked at the effect of tooth whitening on glass ionomer type materials. 12,16,18,[23][24][25][26][27][28][29] and changes to colour, surface microhardness, roughness, dissolution, microleakage and staining susceptibility were the adverse effects usually studied.…”