Fig. 4From: Evaluation of toothpastes for treating root carious lesions – a laboratory-based pilot study19F MAS NMR of samples after 13-days pH-cycling: Group 1. Deionised water; Group-2. BG with 540 ppm F; Group 3. 1,450 ppm F; Group 4. 5,000 ppm FBack to article page