Effect of At‐Home Whitening Strips on the Surface Roughness and Color of a Composite and an Ormocer Restorative Material

Abstract

The tested whitening agent did not affect the surface roughness of either resin-based restorative material. Both materials became brighter after whitening. The behavior of the materials in the yellow/blue axis was opposite to each other after whitening. Each material had clinically unacceptable color change after whitening (ΔE > 5.5); however, the magnitude of the color change of materials was similar (p > 0.05). According to the results of this study, with the use of materials tested, patients should be advised that existing composite restorations may bleach along with the natural teeth, and replacement of these restorations after whitening may not be required.

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

“…The varied findings obtained for the surface roughness and flexural property measurements may indicate that the chemical bonds at the resin‐filler interface were inferior in the polyacid‐modified composite relative to the composite resin and that the bleaching agents can diffuse into deeper layers of the polyacid‐modified composite. Consistent with the previous studies, significant color changes were observed after the bleaching treatment, which might be attributed to surface amine oxidation and surface reflectance changes …”

“…For laboratory studies, the effects of bleaching on restorative materials might be closely related to the study protocols including the material tested, the peroxide concentration, the treatment period, and the environmental temperatures. Materials with different monomer systems, such as composite resins, polyacid‐modified composites, and resin‐modified glass‐ionomer cements, may exhibit different levels of susceptibility to bleaching agents . In terms of peroxide concentration, although the in‐office bleaching employs higher concentrations of HP or CP, the adverse effects of this treatment on restorative materials might be similar or even less significant than at‐home bleaching, which has a longer treatment time .…”

“…Materials with different monomer systems, such as composite resins, polyacid-modified composites, and resin-modified glassionomer cements, may exhibit different levels of susceptibility to bleaching agents. 3,7,8 In terms of peroxide concentration, although the in-office bleaching employs higher concentrations of HP or CP, the adverse effects of this treatment on restorative materials might be similar or even less significant than at-home bleaching, which has a longer treatment time. 8 Environmental temperature might be responsible for the inconsistencies reported in previous studies.…”

“…Notwithstanding the relative safety of the treatment, the fact that HP or CP is kept in close contact with the teeth and any associated restorations raises the question of whether the bleaching agent causes undesirable and adverse alterations to the teeth and restorative materials, such as softening and degradation. 2 For this reason, numerous investigations have been conducted to evaluate the effects of bleaching on the properties of restorative materials, such as surface microhardness, 3,4 surface roughness, 5 color, 6,7 and flexural strength. 8,9 Although bleaching agents are effective, their effects on restorative materials have been controversial in previously published studies.…”

The effect of home bleaching agents on the surface roughness of five different composite resins: A SEM evaluation

“…Gurbuz et al . () reported that application of whitening strip containing 6.5% HP did not affect the surface roughness of an ormocer based and a nano‐fill composite. In contrast, Gurgan and Yalcın () found that whitening strip containing 6.5% HP significantly increased the surface roughness of an ormocer based resin material.…”