Measuring initial enamel erosion with quantitative light-induced fluorescence and optical coherence tomography: an in...

Area of Science:

• Dental research
• Biophotonics
• Materials science

Background:

• Current in vitro methods for measuring initial enamel erosion are limited.
• Optical coherence tomography (OCT) and quantitative light-induced fluorescence (QLF) are established for advanced erosion but underexplored for early stages.

Purpose of the Study:

• To assess the sensitivity of QLF and OCT in detecting initial dental erosion in vitro.
• To compare the efficacy of QLF and OCT with surface microhardness in monitoring early demineralization.

Main Methods:

• Human incisors were prepared with exposed and non-exposed areas.
• Baseline and stepwise measurements (every 10 min) were taken using QLF, OCT, and surface microhardness during a 60-min orange juice challenge.
• Statistical analysis involved multiple linear regression and paired t-tests.

Main Results:

• All three methods showed significant dose-response relationships with the erosive challenge (p < 0.05) and detected changes by 10 minutes.
• Surface microhardness detected changes every 10 minutes.
• QLF detected changes at 20, 40, 50, and 60 minutes, while OCT detected changes at 50 and 60 minutes.

Conclusions:

• OCT and QLF effectively detect demineralization after just 10 minutes of erosive challenge.
• These techniques are suitable for monitoring the progression of initial enamel erosion in vitro.
• Further research may validate their clinical applicability for early dental erosion detection.