Niccoli-Filho W, Furlani J C, Schwab C, Raldi F V, Eduardo C de P
Department of Diagnosis and Oral Surgery of Sao Paulo State University-UNESP, School of Dentistry.
J Laser Appl. 1997 Dec;9(6):291-4. doi: 10.2351/1.4745472.
To establish safety parameters, we in vitro studied the increase in intrapulpal temperature caused by the use of a cw CO2 laser. A thermistor was implanted in the inner part of the pulpal chamber of 25 human lower third molars to measure the intrapulpal temperature produced by laser powers between 2-10 W and exposure times of 0.5-25.0 s. The Pearson linear correlation factor applied to the measured values showed there is a direct relationship between the independent variable and the applied power. A variance analysis produced the linear regression equation: T = 1.10 + (0.127)E where T is the temperature and E the energy. The results showed that, with a power of 4 W and maximum exposure time of 2:5 s (10 J) and a power density of 12,738.85 W cm-2, there will be no damaging reactions affecting the pulpal tissues.
为确定安全参数，我们在体外研究了连续波二氧化碳激光使用引起的牙髓腔内温度升高情况。将一个热敏电阻植入25颗人类下颌第三磨牙牙髓腔内部，以测量激光功率在2 - 10瓦、曝光时间在0.5 - 25.0秒时产生的牙髓腔内温度。应用于测量值的皮尔逊线性相关系数表明自变量与施加功率之间存在直接关系。方差分析得出线性回归方程：T = 1.10 + (0.127)E，其中T为温度，E为能量。结果表明，功率为4瓦、最大曝光时间为2.5秒（10焦耳）且功率密度为12,738.85瓦/平方厘米时，不会有影响牙髓组织的损伤反应。
