Color change of white spot lesions after resin infiltration

Abstract

This study evaluates color change of the enamel lesion before and after resin infiltration and after thermocycling (TC) in order to assess clinical usefulness of resin infiltrant in restoring esthetics of incipient enamel caries lesions. Twenty‐five healthy premolars were prepared and crown portions were vertically cut. Specimens were emerged in acryl blocks with relatively flat proximal surface facing outside. Specimens were put in decalcification solution (50 mM acetic acid solution, 3 mM CaCl2·H2O, 3 mM KH2PO4, 6 µM methylhydroxydiphosphonate, pH 4.95, 37°C), and were kept for 160 h, in order to make white spot lesions on the exposed enamel. Degree of decalcification was observed with microscope and nine specimens were excluded because of inadequate decalcification (n = 41). L*, a*, and b* were measured with colorimeter at the baseline (T1), after production of white spot lesions (T2), after infiltration of resin infiltrants (ICON®, DMG, Hamburg, Germany) (T3), after 3000 (T4), 6000 (T5), and 10,000 cycles (T6) of TC. L* was highest at T2, but significantly decreased until T6 which was the closest value to T1 (P < 0.05). a* was highest at T2 and decreased gradually until T6, whereas b* was lowest at T2 and was highest at T3 and decreased gradually until T6. Δ Eab * less than 3.7 showed between T1 and T4, between T1 and T5, and between T1 and T6, which suggested that it was hard to differentiate one from the other clinically. Resin infiltrated lesions showed recovery of CIE value close to that of healthy enamel over time. © 2013 Wiley Periodicals, Inc. Col Res Appl, 39, 506–510, 2014

Resistance of resin‐infiltrated enamel to surface changes in response to acidic challenge

“…It may also be attributed to the fact that Coca‐Cola is darker than Redbull beverage . Ourcolor results came in agreement with those of Bak et al and Yetkiner et al who proved the ability of resin infiltrant to resist thermal and discoloration challenges. Regarding surface roughness, our results agreed with previous studies which concluded that resin infiltration of enamel lesions can provide and maintain smoother surface.…”

“…Resin infiltration has become a promising treatment option for incipient white lesions (WSLs) of enamel . However, concerns still exist regarding its ability to resist degradation by different factors in the oral cavity …”

Effect of resin infiltration on the color and microhardness of bleached white‐spot lesions in bovine enamel (an in vitro study)

“…Based on this idea, a greater color change (Δ E *) was observed in the group treated with a resin infiltrant after bleaching than for the other groups. The color alteration of WSLs are similar to previous studies which showed an increased Δ E * values in both bleaching and resin infiltration groups.…”

“…(b) SEM view of the cross-sections of the bleached/resininfiltrated lesions revealed a distinct ultramorphologies like as holes and column gaps were observed amongst the cured resin material (red arrows) (at viewed at 5,000 times magnification) FIG URE 3 (a) SEM view of the eroded area in the demineralized enamel after etching for 120 s with HCl acid gel showing the dissolution of the enamel surface layer and the expose of the underlying layer (red arrows) (as viewed at 1,000 times magnification). (b) SEM view showing the penetration of the resin infiltrant into the spaces formed in the HCL acid-applied demineralized enamel seen in Fig.3a (red arrows) (as viewed at 1,000 times magnification) HORUZTEPE AND BASEREN | 383alteration of WSLs are similar to previous studies9,32,33 which showed an increased DE* values in both bleaching and resin infiltration groups.…”

The post‐traumatic colour change of primary incisors: a colourimetric and longitudinal study

“…The intraoral colourimeter used in this study was reported to represent CIE values with high accuracy and reproducibility. It also has a suitable tip size to measure the value on the labial surface of the primary incisor; however, the CIE Lab results from the present study may not be considered as the absolute reference values because there may be variability depending on the different type of measuring devices. Nevertheless, the results presented in this study may be helpful to understand the characteristics of the colour change of primary incisors after trauma.…”