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

发布时间：2018-02-22 03:49

本文关键词： Er YAG激光牙本质粘结强度　出处：《口腔医学研究》2017年01期 　论文类型：期刊论文

【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-50μs Er:YAG激光组;3 W-100μs Er:YAG激光组;4.5 W-50μs Er:YAG激光组;4.5 W-100μs 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RelyXTM 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1mm、4mm、7mm处切成三段1.0mm×1.0mm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 W10-100μs 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(P0.05)。根管上部和中部粘结强度高于根管下部,差异有显著性(P0.05)。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-100μs 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。
[Abstract]:Objective: to study the effect of Er:YAG laser with different parameters on the bond strength of root canal wall. Methods: 60 human maxillary central incisors were collected and randomly divided into 5 groups according to different treatment methods. 3W-50 渭 s Er:YAG laser group, 3.W-100 渭 s Er:YAG laser group, 4.5W-50 渭 s Er:YAG laser group, 4.5W-100 渭 s Er:YAG laser group, 12 in each group. After the preparation of the pile path, the RelyXTM Unicem resin reinforced fiber pile was cemented into the root canal by RelyXTM Unicem adhesive resin cement gate. Under the condition of income, the fiber pile was cut by slow sawing around the peripheral parallel slice, and then the vertical bonding surface was cut into three rectangular cylindrical specimens of 1.0 mm 脳 1.0 mm at 1mm / 4mm / 7mm. The microtensile strength was measured. The mean values of microtensile strength in different root canal treatments and different root regions were analyzed by means of two factors variance analysis (伪 -0. 05). The fracture types were analyzed under electron microscope. The fracture rate of different types of components was tested by 蠂 2 test (伪 0. 05%). Results the tensile strength of group 1: 3 W10-100 渭 s Er:YAG was the highest (5. 55 卤0. 97 MPA), which was significantly higher than that of control group (4. 06 卤1. 22 MPA). The bond strength of upper and middle root canal was higher than that of lower part of root canal. Conclusion the effect of W: er: YAG laser treatment on the bond strength between dentin surface and fiber post is related to the laser power and pulse duration. The surface treated by Er:YAG laser can significantly enhance the fiber post and root canal tooth. Intrinsic bond strength.
【作者单位】：杭州口腔医院特需科;
【分类号】：R781.05

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