Effect of whitening dentifrices on the surface roughness of a nanohybrid composite resin

Abstract

Objectives:The present study verified the influence of whitening dentifrices on the surface roughness of a nanohybrid composite resin.Materials and Methods:Thirty-two specimens were prepared with Filtek™ Z350 XT (3M/ESPE) and randomly divided into four groups (n = 08) that were subjected to brushing simulation equivalent to the period of 1 month. The groups assessed were a control group with distilled water (G1), Colgate Total 12 Professional Clean (G2), Sensodyne Extra Whitener Extra Fresh (G3), and Colgate Luminous White (G4). A sequence of 90 cycles was performed for all the samples. The initial roughness of each group was analyzed by the Surface Roughness Tester (TR 200-TIME Group Inc., CA, USA). After the brushing period, the final roughness was measured, and the results were statistically analyzed using nonparametric Kruskal–Wallis and Dunn tests for intergroup roughness comparison in the time factor. For intragroup and “Δ Final − Initial” comparisons, the Wilcoxon test and (one-way) ANOVA were, respectively, performed (α = 0.05).Results:The roughness mean values before and after brushing showed no statistically significant difference when the different dentifrices were used. None of the dentifrices analyzed increased significantly the nanohybrid composite resin surface roughness in a 1 month of tooth brushing simulation.Conclusions:These results suggest that no hazardous effect on the roughness of nanohybrid composite resin can be expected when whitening dentifrices are used for a short period. Similar studies should be conducted to analyze other esthetic composite materials.

A Comparative Evaluation of Stress Resistance Between Nano-hybrid Composite and Ormocer Restorations on Posterior Teeth - in vitro Study

“…On the other hand, it was found that the shrinkage of ormocer was equal to that of hybrid composites despite having less filler content. The authors [14] attributed their findings to the difference in the resin matrix of ormocer [11]. As a result, it was suggested that the advantages of ormocers include amongst others: low shrinkage (1.97 vol%) , high abrasion resistance (compressive strength of 410 Mpa), biocompatibility, protection against caries, does not liberate any residual monomer after polymerization and has a better manipulation [12].…”

“…As a result, it was suggested that the advantages of ormocers include amongst others: low shrinkage (1.97 vol%) , high abrasion resistance (compressive strength of 410 Mpa), biocompatibility, protection against caries, does not liberate any residual monomer after polymerization and has a better manipulation [12]. Ormocer materials have multiple indications in dentistry such as direct restoration for all types of cavities, cosmetic veneers, protective sealant for child teeth, protective varnish as caries prophylaxis and as orthodontic bonding adhesive [13,14]. It is believed that the ormocer material is an excellent option for posterior restorations.…”

The Effect of Brushing and Aging on the Staining and Smoothness of Resin Composites

“…The complex association of the various aforementioned factors is not easily reproducible in an in vitro setting. Although the study of each of these factors on the degradation of resin composites has provided valuable scientific evidence, it has also generated contradictions . Tooth brushing increases resin composite roughness, which negatively affects optical properties.…”

“…Although the study of each of these factors on the degradation of resin composites has provided valuable scientific evidence, it has also generated contradictions. 3,4,9,13,14 Tooth brushing increases resin composite roughness, 2,3 which negatively affects optical properties. On the other hand, tooth brushing has also been associated with reduced retention of extrinsic pigments.…”

Effect of whitening toothpastes on color stability of different restorative materials

“…Acceptable performance of esthetic restorative materials is dependent on their resistance to degradation in the oral environment (Asmussen & Hansen 1986). Among the contributing factors are abrasion resulting from mastication, attrition, corrosion, erosion, and effects of hygiene procedures (Asmussen & Hansen 1986;Schmitt et al 2011;da Rosa et al 2016). Tooth brushing is an oral hygiene method that can increase the surface roughness of resin composites (Kamonkhantikul et al…”