Morphological analysis of irradiated dentin by scanning electron microscope under anhydrous condition

VernacularTitle:Er,Cr∶YSGG激光无水条件下照射牙本质的扫描电镜观察
Author: Lu YAN ; Shangmin SUN ; Jingtao YU
Publication Type:Journal Article
Keywords: Er,Cr∶YSGG laser; Dentin; Scanning electron microscopy
From: International Journal of Biomedical Engineering 2013;36(6):348-350,356
CountryChina
Language:Chinese
Abstract: Objective To observe the surface morphology of dentin irradiated by Er,Cr∶YSGG laser under anhydrous conditions and discuss the possible clinical applications of the laser.Methods 11 freshly extracted specimens (approximately 1.5 mm thick) taken from the first premolars were selected.One was regarded as the control group without any treatment and the remaining ten were divided into 5 groups whose dentin surface was irradiated by Er,Cr∶ YSGG laser with different energy (1,2,3,4,6 W) under anhydrous condition.The specimens were routinely prepared for electron microscopic scanning observation.Results As the output power increased with Er,Cr∶YSGG laser irradiation,the dentin surface was observed of the constriction of tubular lumen,and part of the tubules closed.The dentin surfaces with 3 ～6 W laser irradiation were observed thermal injury alters such as micro crack and carbonization.Conclusion 1 ～2 W anhydrous Er,Cr:YSGG laser irradiation play a more ideal and safe constriction and sealing role to dentinal tubules,and the laser is expected to be used for the treatment of dentin hypersensitivity.