Er,Cr:YSGG激光对老年人非龋性硬化牙本质粘结强度的影响

发布时间：2018-06-28 07:16

本文选题：Er + Cr　；参考：《牙体牙髓牙周病学杂志》2014年09期

【摘要】：目的:评价Er,Cr:YSGG激光备洞对离体牙楔形缺损处非龋性硬化牙本质与复合树脂间粘结性能的影响。方法:选取40个颊侧颈部有楔形缺损的老年人(60~70岁)前磨牙,随机分2组(n=20),分别用Er,Cr:YSGG激光(实验组)和高速涡轮牙钻(对照组)备洞后,用复合树脂Filtek Z350进行充填;然后每组各取15个样本制备成粘结面积约为1 mm×1 mm的哑铃形片状试件,用Instron 5848微力试验机测定其微拉伸粘结强度(MBS);每组剩余的另5个样本分别沿颊舌向平行于牙体长轴分成两部分后,用扫描电镜观察粘结界面形态。结果:实验组和对照组的MBS(MPa)分别为35.24±7.05和27.56±4.79(P0.05);扫描电镜下可见,实验组混合层较薄,部分区域的混合层、树脂突及牙本质小管内的硬化结晶柱紧密连接在一起。结论:Er,Cr:YSGG激光预备有助于提高老年人非龋性硬化牙本质与复合树脂材料间的粘结强度。
[Abstract]:Objective: to evaluate the effect of Ernchr Cr: YSGG laser cavity preparation on the adhesion between non-caries sclerosing dentin and composite resin in wedge-shaped defect of isolated teeth. Methods: forty premolars (60 ~ 70 years old) with wedge-shaped defects in the buccal neck were randomly divided into 2 groups (n = 20). The premolars were filled with composite resin Filtek Z350 after the holes were prepared with ErtCr: YSGG laser (experimental group) and high speed turbine drill (control group). Then 15 samples were taken from each group to form dumbbell shaped specimens with adhesive area of about 1 mm 脳 1 mm. The microtensile bond strength (MBS) was measured by Instron 5848 microforce tester, and the remaining five samples were divided into two parts along the buccal and lingual direction parallel to the long axis of the tooth, and the interface morphology was observed by scanning electron microscope (SEM). Results: the MBS (MPA) of experimental group and control group were 35.24 卤7.05 and 27.56 卤4.79 (P0.05) respectively. ConclusionThe laser preparation of Cr: YSGG can improve the bond strength between the noncaries sclerosing dentin and the composite resin in the elderly.
【作者单位】：承德医学院附属医院口腔科;中国医科大学口腔医学院干诊科;
【分类号】：R781.2

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