上海口腔医学 ›› 2025, Vol. 34 ›› Issue (3): 233-236.doi: 10.19439/j.sjos.2025.03.002

• 论著 • 上一篇    下一篇

Er:YAG激光联合NaClO对根管玷污层清除率和牙本质显微硬度的影响

白雪1, 汪潇2   

  1. 1.赤峰学院附属医院 口腔科,内蒙古 赤峰 024000;
    2.赤峰市肿瘤医院 口腔科,内蒙古 赤峰 024000
  • 收稿日期:2024-10-29 修回日期:2024-12-18 出版日期:2025-06-25 发布日期:2025-06-24
  • 通讯作者: 白雪,E-mail:15560468712@163.com
  • 作者简介:白雪(1987-),女,本科,主治医师
  • 基金资助:
    内蒙古自治区自然科学基金(2021LHMS08037)

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

Bai Xue1, Wang Xiao2   

  1. 1. Department of Stomatology, Chifeng University Affiliated Hospital. Chifeng 024000;
    2. Department of Stomatology, Chifeng Cancer Hospital. Chifeng 024000, Inner Mongolia Autonomous Region, China
  • Received:2024-10-29 Revised:2024-12-18 Online:2025-06-25 Published:2025-06-24

摘要: 目的: 评估铒钇铝石榴石(Er:YAG)激光联合次氯酸钠(NaClO)在清除根管玷污层及对氢氧化钙清除率和牙本质显微硬度的影响。方法: 选择2021年3月—2024年1月收集的318颗单根管离体牙,取13 mm牙根,机械预备后随机分为三组,每组106颗。对照组采用NaClO冲洗,实验组1在NaClO基础上联合超声荡洗,实验组2在NaClO基础上联合Er:YAG激光处理。通过电子显微镜观察根管玷污层清除情况,采用显微硬度计评估治疗后牙本质显微硬度。结果: 实验组2的氢氧化钙清除率显著高于实验组1和对照组,冠方1/3、根中1/3和根尖1/3的玷污层评分显著低于另外两组(P<0.05)。三组初始和最终显微硬度相比,无显著差异(P>0.05)。结论: Er:YAG激光联合NaClO在根管治疗中可有效增强玷污层清除效果,对牙本质显微硬度影响较小。

关键词: Er:YAG激光, 超声荡洗, 次氯酸钠, 根管玷污层清除率, 牙本质显微硬度

Abstract: PURPOSE: To evaluate the effects of Er:YAG laser combined with NaClO on the removal of root canal taint layer, calcium hydroxide clearance and dentin microhardness. METHODS: A total of 318 single-rooted extracted teeth collected from March 2021 to January 2024 were selected, the 13 mm root was taken and mechanically prepared and randomly divided into three groups, with 106 teeth in each group. The control group was rinsed with NaClO, the experimental group 1 was rinsed with NaClO combined with ultrasonic washing, and the experimental group 2 was treated with Er:YAG laser on the basis of NaClO. The removal of the smear layer was observed under electron microscope, and the microhardness of dentin post-treatment was assessed using a microhardness tester. RESULTS: The clearance rate of calcium hydroxide in experimental group 2 was significantly higher than that in experimental group 1 and control group, and the stain layer scores of crown formula 1/3, root middle 1/3 and root tip 1/3 were significantly lower than those in the other 2 groups(P<0.05). There was no significant difference between the initial and final microhardness of the three groups(P>0.05). CONCLUSIONS: Er: YAG laser combined with NaClO can effectively enhance the removal effect of stain layer in root canal therapy, and has little effect on dentin microhardness.

Key words: Er:YAG Laser, Ultrasonic washing, Sodium hypochlorite, Root canal smear layer removal rate, Dentin microhardness

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