Evaluation of the color stability of materials used in the resin infiltration technique for artificial white spot lesions

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Key Points

The study aims to evaluate the color stability of materials used in the resin infiltration technique for artificial white spot lesions.
Twelve human maxillary central incisors were prepared to create artificial white spot lesions.
Specimens were restored with infiltration resin (ICON) and conventional composite resins (shades A1 and A3.5).
Accelerated aging test was conducted by storing specimens in distilled water at 60°C for 30 days.
Mean total color differences (ΔE*) at 30 days were 5.55 for infiltration resin, 6.45 for composite resin A1, and 4.0 for composite resin A3.5.
All groups showed ΔE* values exceeding the perceptibility threshold (ΔE* = 3.3).
Discoloration was mainly due to reduced brightness (ΔL*) and increased yellowness (Δb*), with no significant differences between the infiltration resin and composite groups.

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Evaluates color stability of resin infiltration technique in artificial white spot lesions, suggesting findings for clinical practice.

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Bae et al. (2026) studied this question.

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