Effect of Coffee on Color Stability and Surface Roughness of Newly Introduced Single Shade Resin Composite Materials.

Abstract

Background Dentists started to follow the era of using single shade resin composite restorations to avoid color shade selection. Our study was done to evaluate and compare color stability of two single shade resin composite materials. Methods sixty samples were randomly allocated into two main groups (n = 30) according to the composite resin used: Group O: (Omnichroma) samples and Group V: (Venus Peral) samples. Each group was then divided into two subgroups (n = 15): group O1 and V1: samples immersed in coffee. Group O2 and V2: samples immersed in distilled water. Color changes (Δ E) and roughness values (Ra) were evaluated at baseline, 1st, and 14th days of immersion. Color change was assessed using Vita Easy Shade V while surface roughness was assessed using, profilometer and Atomic Force Microscope (AFM), respectively. Data were collected and statistically analyzed using two-way variance analysis (ANOVA) and Tukeys post-hoc test (p < 0.05). Results Group O1 and V1 recorded the highest Δ E (P = 0.0002, 0.001, respectively) and Ra values (P < 0.001) no significant difference between both materials at 14 days Conclusion Single shade resin composite with smart chromatic material technology has dramatically color change and surface roughness that sacrifice esthetic success.

In Vitro evaluation of the effects of whitening toothpastes on the color and surface roughness of different composite resin materials

“…We used a coffee solution for the staining because coffee (one of the most commonly used beverages) causes the greatest discoloration of restorative materials [ 19 , 26 , 27 ]. Moreover, the high temperature and acidity of coffee can cause composite resin discoloration.…”

“…Therefore, composite resin samples were stored in an incubator at 37 ºC to stimulate the oral environment. The coffee solution was prepared by the investigator for every brushing cycle to minimise bacterial growth [ 19 ]. To deal with the problem of the visual assessment of color, devices such as colorimeters and spectrophotometers have been used in previous studies [ 19 , 29 ].…”

“…The coffee solution was prepared by the investigator for every brushing cycle to minimise bacterial growth [ 19 ]. To deal with the problem of the visual assessment of color, devices such as colorimeters and spectrophotometers have been used in previous studies [ 19 , 29 ]. According to the literature, color can be detected with a spectrophotometer device 33% more accurately and 93.3% more objectively than using the visual method [ 30 ].…”

“…The thickness of each sample was measured with a digital caliper (Mitutoyo, Kawasaki, Japan) for standardisation. After polishing, the specimens were kept in deionized water at 37 °C for 24 h [ 19 ].…”

Color stability and degree of conversion of gingiva‐colored resin‐based composites

“…On the other hand, the decision to polymerize under a Mylar matrix and not polish the samples was made due to the difficulty in standardizing the results of manual polishing. Considering the significant correlation between color stability and roughness, 40,41 the absence of a finishing and polishing phase in the study can be viewed as a limitation. Including this phase would have better simulated the material's usage under clinical conditions.…”