TOKYO, Japan: Caries excavation is often decided at the margin. In practice, the challenge is not recognising caries; it is choosing an excavation end-point that removes infected dentine and conserves sound and remineralisable dentine, particularly when the lesion is deep. CARIES DETECTOR from Kuraray Noritake Dental provides a simple yet effective way to achieve this precision by visually differentiating infected from affected dentine during caries excavation.