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Chin. Opt. Lett.
 Home  List of Issues    Issue 05 , Vol. 11 , 2013    10.3788/COL201311.051701


Determination of ablation threshold of dental hard tissues irradiated with Er:YAG and Er,Cr:YSGG lasers
Zhenlin Zhan, Xianzeng Zhang, Wenqing Guo, Shusen Xie
Fujian Provincial Key Laboratory for Photonics Technology, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, [Fujian Normal University], Fuzhou 350007, China

Chin. Opt. Lett., 2013, 11(05): pp.051701

DOI:10.3788/COL201311.051701
Topic:Medical optics and biotechnology
Keywords(OCIS Code): 170.1020  140.3500  170.1850  

Abstract
We evaluate the ablation thresholds of Er:YAG and Er,Cr:YSGG laser for enamel and dentin. A total of 140 dental slices is evenly divided into two groups: the dentin group and the enamel group. Dental tissues are irradiated with either an Er:YAG laser or an Er,Cr:YSGG laser with pulse widths in the order of 100 \mu s. The laser fluence is increased gradually until the ablation crater is formed. The laser ablation threshold is calculated using probit analysis. The ablation thresholds of the Er:YAG laser for dentin and enamel range from 2.88 to 3.36 J/cm2 and from 2.94 to 3.8 J/cm2, respectively, and the ablation thresholds of the Er,Cr:YSGG laser for dentin and enamel range from 2.92 to 4.2 J/cm2 and from 4.93 to 5.66 J/cm2, respectively.

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Received:2012/10/29
Accepted:2013/1/25
Posted online:2013/4/24

Get Citation: Zhenlin Zhan, Xianzeng Zhang, Wenqing Guo, Shusen Xie, "Determination of ablation threshold of dental hard tissues irradiated with Er:YAG and Er,Cr:YSGG lasers," Chin. Opt. Lett. 11(05), 051701(2013)

Note: This work was supported by the National Natural Science Foundation of China (No. 60878062), the Science Research Foundation of Ministry of Health & United Fujian Provincial Health and Education Project for Tackling the Key Research (No. WKJ2008-2-035), and the Natural Science Foundation of Fujian Province (No. 2012J01255).



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