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

Table 1

Sample grouping and treatment.

Groups	Laser	n-HA paste	Time (s)	Interval (s)	Power (W)	Spot size (mm)	Pd^a (W/cm²)
C^b	—	—	—	—	—	—	—
L−^c	CO2	−	6X (5 s)	5X (20 s)	0.65	0.4	129.33
L+^d	CO2	+	6X (5 s)	5X (20 s)	0.65	0.4	129.33

Power density.
^bControl group.
^cLaser only group.
^dLaser plus nanoparticle hydroxyapatite paste group.