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Description:
meter after laser irradiation wasalso performed.The results showed that the laser energy output wasthe same as our desired irradiation parameters. The laser tipwas held perpendicular to the irradiating each specimen toprevent energy loss. It was swept with the whole irradiation areaof 7mm x 3mm at a speed of about 10mm/second with a totalirradiation time of 30s to simulate clinical manipulation. Inorder to reduce the thermal effect of diode laser, distilledwater cooling (30ml/minute) was applied simultaneously during laserirradiation.
Result:
All dentin specimens after 10% EDTA and 2.5% NaOCI treatments, butwithout laser irradiation (control group) demonstrated evenand clean surfaces. No smear layer converings and exposeddentinal tubules orifices were noted. After receiving 7w ofdiode laserirradiation for 30 seconds, every examined specimen showed manyoccluded dentinaltubules orifices. No detrimental structure changes were found. Thespecimens receivedlaser irradiation below 7w all demonstrated similarmicrostructures.Most of the dentinaltubules orifices could be clearly found.
