SEM micrographs of dentin surface areas before and after treatment with Xeno V.

Figure 4a: There are several open dentin tubules on the sensitive dentin (marked with arrows) before the treatment (1,040×, bar=20 μm). Figure 4b: Most dentin tubules are occluded immediately after the application of Xeno V (1,060×, bar=20 μm). Figure 4c: Some dentinal tubules are re-opened one month after Xeno V treatment (tiny holes marked with arrows) (1,000×, bar=50 μm).