Fig. 3
From: Evaluation of toothpastes for treating root carious lesions – a laboratory-based pilot study
Representative SEM images of SE and BSE (500x and 5000x) of each sample after 13 days of pH-cycling; sample treated with deionised water in SE (a-i) and BSE (a-ii); sample treated with toothpaste containing BG with 540 ppm F in SE (b-i) and BSE (b-ii); sample treated with toothpaste containing 1,450 ppm F in SE (c-i) and BSE (c-ii); sample treated with toothpaste containing 5,000 ppm F in SE (d-i) and BSE (d-ii)