Cielab Assessment Of Enamel And Dentin Caries: An Original Study.
Keywords:
CIE LAB ASSESSMENT ; Tooth caries ; Enamel and dentin caries.Abstract
Background: Tooth bleaching remains one of the most requested and effective conservative procedures for treating intrinsic and extrinsic dental discoloration. To properly assess the efficacy of modern whitening agents, precise, quantifiable metrics are required, making spectrophotometric evaluation utilizing the CIE LAB tridimensional color space a clinical gold standard.
Objective: The aim of this study was to evaluate the optical behavior of tooth color using CIE LAB space; the teeth were subjected to novel bleaching gels containing peroxide carbamide with potassium oxalate.
Materials and Method: Three different carbamide peroxide gels were experimentally fabricated. They consisted of 10% (G10), 16% (G16) and 37% (G37) concentrations. Sixty recently extracted premolars were subjected to different bleaching protocols. Color change (ΔE) was assessed using the CIE Lab system after the application of each gel. The data were analyzed using one-way ANOVA with Tukey’s post hoc test (α=5%) and a t-test.
Results: The G10 and G16 gels exhibited an increase in ΔE ab parameters from T0 to T1 (T0: application day of the gels. T1: 14th day measurement); a small decrease from T1 to T2 was also noted (T2: control measurement, 28th day). However, no statistically significant differences were found (p=0,22 for G10 and p=0,10 for G16). The G37 gel also exhibited an increase in ΔE*ab parameters, with similar results after the first application of 45 min, the second application of 45 min, and the third application of 45 min (T1, T2 and T3, respectively. T4: control measurement, 14th day). No statistically significant differences were observed between the three times of application (p>0,69), and an appreciable difference was noted between times T3 and T4 (p=0,000).
Conclusions: The presented formulations of peroxide carbamide at 10%, 16%, and 37% are clearly effective. The G10 and G16 gels exhibited better effectiveness than the G37 gel.
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