Er:YAG激光照射牙科全瓷材料后的光透射率和温度变化分析  

Analysis of changes in light transmittance and temperature of dental all ceramic materials irradiated by Er:YAG laser

作　　者：杨烁[1] 贠照强[2] 徐淑兰[1] 易枚枚 程鸣威 赵磊 林国业 许庆[2] Yang Shuo;Yun zhaoqiang;Xu shulan;Yi Meimei;Cheng Minwei;Zhao Lei;Lin Guoye;Xu Qing(Stomatological Hospital,Southern Medical University,Guangzhou 510280;School of Bioengineering,Southern Medical University,Guangzhou 510000)

机构地区：[1]南方医科大口腔医院·广东省口腔医院,广州510280 [2]南方医科大学生物工程学院,广州510000

出　　处：《口腔材料器械杂志》2022年第2期88-93,共6页Chinese Journal of Dental Materials and Devices

基　　金：广东省医学科研基金项目(编号:A2020458)。

摘　　要：目的评估牙科全瓷材料的光学特性和激光穿透全瓷材料后温度变化之间的关系,为临床提供依据和指导。方法选择两种光学特性不同的全瓷样品(Zenostar T、X-CERA TT)制成不同厚度的方块。用分光光度计测量两种样品在不同厚度下的光透射率;将Er:YAG激光设定波长为2940 nm,频率为15 Hz,脉宽为330 us,光斑直径为1 mm,照射全瓷瓷块样品5 s,用热电偶温度计测量激光穿透样品前后的温度,计算其温度变化情况。结果两种材料的光透射率都随着样品厚度的增加而下降,同等厚度的瓷块在200~780 nm波长光源照射下,Zenostar T与X-CERA TT的光透射率不存在明显差异;在780~2500 nm波长光源,X-CERA TT样品的光透射率高于Zenostar T样品。Er:YAG激光能量从50 mJ逐级增加,至250 mJ,温度测量结果显示:Zenostar T和X-CERA TT全瓷样品测试温度分别升高5.01~56.5℃和3.67~34.4℃。在1~1.5 mm样品厚度区间内,随着Er:YAG激光照射能量增加后,Zenostar T样品的温度升高幅度均高于X-CERA TT样品(P<0.05);样品为2~2.5 mm厚度时,Zenostar T和X-CERA TT样品的温度变化幅度之间没有统计学差异(P>0.05)。所有样品的光透射率及温度测试的结果均符合指数分布,但是两者之间不存在指数相关性。结论Er:YAG激光穿透牙科全瓷材料后的温度变化与该材料光学透射性之间不存在明显相关性。Objectives This experiment evaluated the relationship between the optical properties of all-ceramic materials and the temperature changes after laser penetration of all-ceramic materials,and provided the basis and guidance for clinical practice.Methods Two kinds of all-ceramic samples(Zenostar T and X-CERA TT porcelain)with different optical properties were selected to make blocks with different thickness.Er:YAG laser wavelength was 2940 nm,the frequency was set to 15 Hz,pulse width was 330 us,the spot diameter was 1mm,and a single irradiation lasted for 5 seconds.The light transmittance of the two samples under different thickness was measured by spectrophotometer.The temperature changes after Er:YAG laser through the samples were measured by a thermocouple thermometer.Results Light transmittance of both materials decreased with the increase of sample thickness.A piece of porcelain of the same thickness exposed to a wavelength source of 200-780 nm,no obvious difference in light transmittance between Zenostar T and X-CERA TT transmittance was observed.At wavelength of 780-2500 nm,the transmittance of X-CERA TT samples was higher than that of Zenostar T samples.Er:YAG laser energy started from 50mJ,increased gradually with the energy of 50 mJ and stopped at 250 mJ.The temperature measurement results showed that the test temperature of Zenostar T and X-CERA TT all-ceramic samples increased by 5.01℃-56.5℃and 3.67℃-34.4℃.respectively.And in the range of 1-1.5 mm sample thickness,as the Er:YAG laser energy increased,the temperature increased of Zenostar T samples was higher than that of X-CERA TT samples(P<0.05).If the sample is 2-2.5 mm thick,there was no statistical difference between the temperature variation range of Zenostar T and X-CERA TT samples(P>0.05).The light transmittance and temperature test results of all samples were in accordance with the exponential distribution,but there was no exponential correlation between the two groups.Conclusion There was no obvious correlation between temperature chan

关 键 词：ER:YAG激光 全瓷修复体 光透射率 温度变化 

分 类 号：R783.1[医药卫生—口腔医学]