Determination of ablation threshold of dental hard tissues irradiated with Er:YAG and Er,Cr:YSGG lasers

被引：2
|
作者：
Zhan, Zhenlin [1 ]
Zhang, Xianzeng [1 ]
Guo, Wenqing [1 ]
Xie, Shusen [1 ]
机构：
[1] Fujian Normal Univ, Minist Educ, Fujian Prov Key Lab Photon Technol, Key Lab OptoElect Sci & Technol Med, Fuzhou 350007, Peoples R China
来源：
CHINESE OPTICS LETTERS | 2013年 / 11卷 / 05期
基金：
中国国家自然科学基金;
关键词：
ER-YAG LASER; YSGG LASER; ENAMEL; RADIATION;
D O I：
10.3788/COL201311.051701
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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/cm(2) and from 2.94 to 3.8 J/cm(2), respectively, and the ablation thresholds of the Er,Cr:YSGG laser for dentin and enamel range from 2.92 to 4.2 J/cm(2) and from 4.93 to 5.66 J/cm(2), respectively.
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页数：5
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