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. 2002 Sep-Nov;30(7-8):291-6.
doi: 10.1016/s0300-5712(02)00023-4.

Pulpal space pressure and temperature changes from Nd:YAG laser irradiation of dentin

V Srimaneepong  1 , J E A Palamara, P R Wilson
Affiliations

Pulpal space pressure and temperature changes from Nd:YAG laser irradiation of dentin

V Srimaneepong et al. J Dent. 2002 Sep-Nov.

Abstract

Objectives: To investigate pulpal space pressure and temperature after application of Nd:YAG laser, and high-speed diamond bur on dentin surface.

Methods: One and 3 W Nd:YAG laser and high-speed diamond bur were used to remove dentine from twenty extracted premolars. The pulp chambers were monitored for pressure and temperature changes with a pressure transducer and thermocouple, respectively.

Results: Regardless of the remaining dentin thickness (RDT), laser irradiation and high-speed diamond bur use generated an increase in pulpal space pressure and temperature (ANOVA and Fisher's LSD tests, P < 0.001). Pressure and temperature increased with an increase in laser power. Three-Watt laser irradiation caused greater changes than 1 W (1.75 kPa and 1.31 degrees C, 0.53 kPa and 0.34 degrees C, respectively). Both pulpal space pressure (P < 0.001) and temperature (P < 0.005) increased as the RDT decreased.

Conclusions: Laser irradiation and the use of a high-speed diamond bur generated an increase in pulpal space pressure and temperature. Pulpal space pressure and temperature increased with an increase in energy density of laser and a decrease in RDT.

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