Key Concepts and Summary

Understanding White Spot Lesions

• White spots are caused by hypomineralisation and appear due to differences in light reflection.
• Transillumination and dehydration techniques help assess the thickness and nature of the enamel surface layer.

Infiltration Technique

• Involves filling hypomineralised enamel with a resin infiltrant that matches the refractive index of healthy enamel.
• Success depends on permeability of the enamel, which is improved by removing or roughening the surface layer.

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