不同参数激光处理根管对纤维桩粘结强度影响的实验研究

doi:10.13701/j.cnki.kqyxyj.2017.01.024

口腔医学研究 ›› 2017, Vol. 33 ›› Issue (1): 102-105.DOI: 10.13701/j.cnki.kqyxyj.2017.01.024

不同参数激光处理根管对纤维桩粘结强度影响的实验研究

李进红^*,金冬梅,王素

杭州口腔医院特需科浙江杭州 310006

收稿日期:2016-11-12 出版日期:2017-01-25 发布日期:2017-01-22
通讯作者: 李进红,电话:0571-28352649
作者简介:李进红(1982~ ),女,山西人,硕士,主治医师,主要从事激光与牙本质粘结的研究工作。

Efficacy of Er:YAG Laser Treatments of Root Canal Walls on the Pull-out Bond Strength of Fiber Posts

LI Jin-hong^*, JIN Dong-mei, WANG Su

Hangzhou Stomatological Hospital, Hangzhou 310006, China.

Received:2016-11-12 Online:2017-01-25 Published:2017-01-22

摘要/Abstract

摘要： 目的:研究不同参数Er:YAG激光处理根管壁牙本质对纤维桩粘结强度的影响,为激光临床应用提供参考。方法:收集60颗人类上颌中切牙,根据不同处理方法随机分为5组;空白对照组;3 W-50 μs Er:YAG激光组;3 W-100 μs Er:YAG 激光组;4.5 W-50 μs Er:YAG激光组;4.5 W-100 μs Er:YAG激光组,每组12颗。离体牙根管预备,充填,桩道预备后,Bisco树脂加强型纤维桩通过RelyX^TM Unicem粘结树脂水门汀粘固于根管内。流水状态下慢速锯将纤维桩外周平行片切,再垂直粘结面片于试件1 mm、4 mm、7 mm处切成三段1.0 mm×1.0 mm的长方形柱状试件,进行微拉伸强度测试。不同根管处理方法与牙根不同区域微拉伸强度均数采用两因素方差分析(α=0.05)。电镜下进行断裂类型分析,组件不同类型断裂率采用χ²检验(α=0.05)。结果:3 W10-100 μs Er:YAG组拉伸强度值最高(5.55±0.97) MPa,与对照组(4.06±1.22) MPa相比较差异有显著性(P＜0.05) 。根管上部和中部粘结强度高于根管下部,差异有显著性(P＜0.05)。结论:Er:YAG激光处理牙本质表面对其与纤维桩粘结强度的影响与激光功率大小和脉冲持续时间有关,3 W-100 μs Er:YAG激光处理表面可以显著增强纤维桩与根管牙本质的粘结强度。

关键词: Er:YAG激光, 牙本质, 粘结强度

Abstract: Objective: To evaluate the effects of Er:YAG laser irradiation under different power settings on the micro tensile bond strength (μTBS) of fiber-reinforced composite posts. Methods: Root canals of 60 single-rooted human teeth were filled and post spaces were prepared. Specimens were divided randomly into five groups, each consisting of 12 specimens as follows: control group, 3W-50μs Er:YAG laser, 3W-100μs Er:YAG laser, 4.5W-50μs Er:YAG laser, and 4.5W-100μs Er:YAG laser. After the root canal procedures, fiber posts were cemented to the root canal. Micro-tensile bond strength tests were performed using a universal testing machine at a crosshead speed of 1 mm/min. The data were analyzed using a two-way ANOVA test (α=0.05). Results: Irradiation by the 3W-100μs Er:YAG laser positively affected the micro-tensile bond strength (5.55±0.97MPa). The bond strength was significantly higher than that of control group (4.06±1.22 MPa, P＜0.05). Conclusion: Er:YAG laser may alter the dentin bond durability.

Key words: Er:YAG, laser, Dentin, Bond, strength

中图分类号:

R783.2

李进红,金冬梅,王素. 不同参数激光处理根管对纤维桩粘结强度影响的实验研究[J]. 口腔医学研究, 2017, 33(1): 102-105.

LI Jin-hong, JIN Dong-mei, WANG Su. Efficacy of Er:YAG Laser Treatments of Root Canal Walls on the Pull-out Bond Strength of Fiber Posts[J]. Journal of Oral Science Research, 2017, 33(1): 102-105.

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不同参数激光处理根管对纤维桩粘结强度影响的实验研究

Efficacy of Er:YAG Laser Treatments of Root Canal Walls on the Pull-out Bond Strength of Fiber Posts

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