Srimaneepong V, Palamara J E A, Wilson P R
School of Dental Science, The University of Melbourne, 711 Elizabeth Street, Melbourne 3000, Australia.
J Dent. 2002 Sep-Nov;30(7-8):291-6. doi: 10.1016/s0300-5712(02)00023-4.
To investigate pulpal space pressure and temperature after application of Nd:YAG laser, and high-speed diamond bur on dentin surface.
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.
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.
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.
研究应用钕钇铝石榴石（Nd:YAG）激光和高速金刚石车针处理牙本质表面后牙髓腔的压力和温度。
使用1W和3W的Nd:YAG激光以及高速金刚石车针对20颗拔除的前磨牙进行牙本质去除操作。分别使用压力传感器和热电偶监测牙髓腔的压力和温度变化。
无论剩余牙本质厚度（RDT）如何，激光照射和使用高速金刚石车针都会导致牙髓腔压力和温度升高（方差分析和Fisher最小显著差异检验，P<0.001）。压力和温度随激光功率的增加而升高。3W激光照射引起的变化比1W激光更大（分别为1.75kPa和1.31℃，0.53kPa和0.34℃）。随着RDT降低，牙髓腔压力（P<0.001）和温度（P<0.005）均升高。
激光照射和使用高速金刚石车针会导致牙髓腔压力和温度升高。牙髓腔压力和温度随激光能量密度的增加以及RDT的降低而升高。
