The effect of CO2 Laser on the permeability of dentinal tubules: a preliminary in vitro study.
OBJECTIVE
The purpose of this in vitro study was to determine whether there is a change in dentin permeability following 9.6-microm CO(2) laser irradiation and high-speed drilling.


METHODS
Twenty permanent, intact, non-carious molars were selected. The crowns were separated from the roots at the cemento-enamel junction. The teeth were randomly divided into two groups, control and experimental, each containing 10 teeth. After class I preparation using a high-speed drill, 9.6-microm CO(2) laser irradiation was applied to dentinal areas only on the experimental group. The samples were soaked in 0.5% methylene blue for 48 h; three independent examiners using scanning electron microscopy evaluated dye penetration through the specimens.


RESULTS
The results of the three examiners were similar. There was a significant difference in dye penetration into dentin after laser irradiation versus controls (p < 0.05).


CONCLUSIONS
The 9.6-microm CO(2) laser appears to be a promising tool in the clinical setting. However, further investigation is needed to ensure maximum effectiveness.
Slutzky-Goldberg
Iris
I
Department of Endodontics, Hebrew University, Hadassah School of Dental Medicine, Jerusalem, Israel.
Nuni
Eyal
E
Nasralla
Warda
W
Stabholtz
Adam
A
Moshonov
Joshua
J
D003737:Dental Cavity Preparation; D003806:Dentin Permeability / Q000528:radiation effects*; D006801:Humans; D054020:Lasers, Gas; D008963:Molar / Q000528:radiation effects; D046509:Tissue Culture Techniques