Title :
Effect of Different Power Parameters of Er,Cr:YSGG Laser on Dentin Ablation Ability and Substrate Morphology
Author :
Zhan, Zhenlin ; Zhang, Xianzeng ; Yu, Lili ; Xie, Shusen ; Peng, Qiming ; Lin, Shi
Author_Institution :
Key Lab. of Optoelectron. Sci. & Technol. for Med., Fujian Normal Univ., Fuzhou, China
Abstract :
The aim of this study was to assess the effect of different power irradiation conditions on human dentin by pulse Er,Cr:YSGG laser. Tissue samples were derived from freshly extracted human molars. The wavelength of pulse Er, Cr:YSGG laser was 2.78 mum, pulse repetition rate was 20 Hz and pulse duration was 140 mus. Laser power of irradiation varied from 1.5 to 4 W. Laser energy was delivered through a fiber optic system to a handpiece containing a tip with a diameter of 600 mum. After irradiation, the morphologic characteristics of ablation craters were measured by use of both stereomicroscope and optical coherence tomography (OCT). Then the specimens were prepared for scanning electron microscope (SEM). The results indicated that Er, Cr:YSGG laser was capable of ablating human dentin. The diameter of ablation craters increased with the output power; the crater depth and ablation volume showed a linear growth with the output power.
Keywords :
biomedical optical imaging; bone; chromium; dentistry; erbium; laser applications in medicine; laser beam effects; laser beams; optical fibres; optical microscopy; optical tomography; scandium compounds; surgery; yttrium compounds; OCT; SEM; YScGG:Er,Cr; dentin ablation ability; fiber optic system; human molars; laser ablation craters; laser energy; laser irradiation; laser power parameters; optical coherence tomography; scanning electron microscope; size 600 mum; stereomicroscope; substrate morphology; time 140 mus; wavelength 2.78 mum; Erbium; Fiber lasers; Humans; Laser ablation; Morphology; Optical fibers; Optical pulses; Power generation; Power lasers; Scanning electron microscopy;
Conference_Titel :
Photonics and Optoelectronics, 2009. SOPO 2009. Symposium on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-4412-0
DOI :
10.1109/SOPO.2009.5230127
