When combined with air drying, shortwave-infrared can be used to detect active dental cavities. (IMAGE)

SPIE--International Society for Optics and Photonics

When combined with air drying, shortwave-infrared can be used to detect active dental cavities.

Caption

When combined with air drying, shortwave-infrared can be used to detect active dental cavities. This is possible because active cavities are porous and hold more water, which affects the infrared measurements around the affected area as the tooth dries.

Credit

Chang et al., doi 10.1117/1.JBO.28.9.094801.

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