Niccoli-Filho, Walter [UNESP]Furlani, José Camilo [UNESP]Schwab, CarlosRaldi, Fernando Vagner [UNESP]De Paula Eduardo, Carlos2014-05-272014-05-271997-12-01Journal of Laser Applications, v. 9, n. 6, p. 291-294, 1997.1042-346Xhttp://hdl.handle.net/11449/65304To 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 12738.85 W cm-2, there will be no damaging reactions affecting the pulpal tissues.291-294engAdverse effectsCarbon dioxide laserPulpTeethTemperature effectsBoneContinuous wave lasersCorrelation methodsLaser applicationsLaser safetyLaser tissue interactionMedical applicationsRegression analysisTemperature measurementThermal effectsThermistorsHuman molarsPulpal tissuesVariance analysisCarbon dioxide laserscarbon dioxideanalysis of varianceenamelheathumanin vitro studylasermolar toothradiation exposureradiation responsestatistical modeltooth pulpAnalysis of VarianceCarbon DioxideDental EnamelDental PulpDose-Response Relationship, RadiationHeatHumansLasersLinear ModelsMolarArtigo10.2351/1.4745472WOS:000071590700004Acesso restrito2-s2.0-00312831647516714539940717