The Effects of CO₂ Laser with or without Nanohydroxyapatite Paste in the Occlusion of Dentinal Tubules

Figure 3

Dye penetration test. D: dentin surface side; P: pulpal side. (a) Control group (C), (b) laser only (L−), and (c) the laser plus nanohydroxyapatite paste (L+). The (C) group shows a full length dye penetration while for the (L+) group the dye is confined mainly to the surface with very slight dye penetration.

(a)

(b)

(c)