Er:YAG激光的应用对根管玷污层清除率和牙本质显微硬度的影响  

Effect of Er:YAG laser application on the root canal smear layer removal and dentin microhardness

作　　者：朱维晨 陈如婷 张红艳[1] Zhu Weichen;Chen Ruting;Zhang Hongyan(College&Hospital of Stomatology,Anhui Medical University,Key Lab.of Oral Diseases Research of Anhui Province,Hefei 230032)

机构地区：[1]安徽医科大学口腔医学院,安徽医科大学附属口腔医院,安徽省口腔疾病研究重点实验室,合肥230032

出　　处：《安徽医科大学学报》2023年第9期1599-1603,共5页Acta Universitatis Medicinalis Anhui

基　　金：安徽省高校自然科学研究项目(编号:KJ2020A0165)。

摘　　要：目的探究Er:YAG激光荡洗技术去除根管玷污层的效果和对牙本质显微硬度的影响。方法选取102颗离体的前磨牙截冠,取长度13 mm的牙根,机械预备后分为实验组(3%次氯酸钠,3%NaOCl)和对照组(0.9%氯化钠溶液,NS),分别接受注射器、超声和Er:YAG激光终末荡洗,具体分组为NaOCl+注射器、NaOCl+超声、NaOCl+激光、NS+注射器、NS+超声和NS+激光组(n=17)。扫描电子显微镜(SEM)评估根管冠方、根中和根尖处玷污层的去除情况、维氏显微硬度仪测量荡洗前后牙本质的显微硬度。结果NaOCl+激光组去除根管玷污层的效果最佳,降低牙本质显微硬度的幅度最大,与NaOCl+超声组降低显微硬度的幅度无统计学差异(P>0.05)。结论Er:YAG激光激活NaOCl溶液提高了玷污层的清除率,降低了对牙本质显微硬度。Objective To explore the effects of Er:YAG laser irrigation technology on smear layer removal and dentin microhardness.Methods A total of 102 ex vivo premolars were selected to amputate the crown,leaving a root length of 13 mm,after mechanical preparation,there were divided into experimental group(3%sodium hypochlorite,3%NaOCl)and control group(0.9%sodium chloride solution,NS),and received syringe,ultrasound and Er:YAG laser terminal irrigation,which were specifically grouped into NaOCl+syringe,NaOCl+ultrasound,NaOCl+laser,NS+syringe,NS+ultrasound and NS+laser groups(n=17).Scanning electron microscopy(SEM)evaluated smear layer removal from the upper,middle and apical parts of the root.The Vickers microhardness tester measured the microhardness before and after irrigation.Results The NaOCl+laser group had the best effect on removing the root canal smear layer,and the amplitude of reducing the microhardness of dentin was the largest.There was no significant difference in the reduction of microhardness compared with the NaOCl+ultrasonic group(P>0.05).Conclusion Er:YAG laser-activated NaOCl solution improves the clearance of the smear layer and reduced the microhardness of dentin.

关 键 词：ER:YAG激光 显微硬度 终末荡洗 玷污层 

分 类 号：R781.3[医药卫生—口腔医学]