Regional measurement of resin-dentin bonding as an array
Regional measurement of resin-dentin bonding as an array
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DOI：
10.1177/00220345990780021001
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发表时间：
1999-02-01
影响因子：
7.6
通讯作者：
Pashley, DH
中科院分区：
文献类型：
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作者：
Shono, Y;Ogawa, T;Pashley, DH
在微拉伸粘结试验方法的开发过程中，注意到连续切片之间粘结强度的变化很大。这些变化的原因尚不清楚。这项工作的目的是通过将复合树脂组合物分成1 x 1 mm的梁阵列，上半部分由复合树脂组成，下半部分由牙本质组成，来确定冠状牙本质咬合面上树脂-牙本质粘结强度的一致性。提取的人第三磨牙的咬合釉质作为一个单一的部分，通过金刚石锯。用One-Step或MacBond粘结牙本质后，制作树脂复合材料。在37摄氏度的水中储存1天后，将牙齿以1毫米的增量垂直切成粘结牙齿的板。每个板通过垂直部分进一步细分为1 x 1 x 8 mm的梁。为每个梁指定一个x-y坐标，并测试拉伸粘合强度。两名不同的临床医生（A和B）在一项平行研究中使用One-Step进行了相同的手术。使用一步法，临床医生A在浅表牙本质中获得了大量的零键，而在深层牙本质中获得的零键较少。这导致粘结强度的标准差非常大（表层牙本质酸的平均值+/- SD为22 +/- 20 MPa，深层牙本质酸的平均值+/- SD为27 +/- 14 MPa）。临床医生B使用One-Step获得了更高（p < 0.001）和更均匀的粘结强度（表层牙本质56 +/- 13 MPa，深层牙本质57 +/- 12 MPa）。使用MacBond时，没有零键，因此变化较小，表层牙本质中的平均值为41 +/- 13 MPa，深层牙本质中的平均值为27 +/- 12 MPa（（x）超过棒+/- SD）。当成对的Z100树脂复合材料圆柱体用One-Step粘合在一起，然后分成阵列时，区域粘合强度变化很小（37 +/- 1 MPa）。将粘结的树脂复合材料构建物分成20至30个1 x 1 x 8 mm梁的阵列，以评估树脂-牙本质粘结的均匀性。在这项研究中使用的方法检测树脂牙本质粘结强度的局部区域差异。最大的差异与技术而不是材料有关。结果表明，树脂牙本质债券可能不像以前认为的那样均匀。
During the development of the microtensile bond-testing method, large variations in bond strengths were noted among serial sections. The reason for these variations is unknown. The purpose of this work was to determine the consistency of resin-dentin bond strengths across the occlusal surface of coronal dentin by dividing composite resin buildups into an array of 1 x 1 mm beams, the top half consisting of composite resin, and the bottom half consisting of dentin. Extracted human third molars had the occlusal enamel removed as a single section by means of a diamond saw. Resin composite buildups were made after the dentin was bonded with either One-Step or MacBond. After being stored in 37 degrees C water for 1 day, the teeth were vertically sectioned at 1-mm increments into slabs of bonded teeth. Each slab was further subdivided by vertical sections into 1 x 1 x 8 mm beams. Each beam was assigned an x-y coordinate and tested for tensile bond strength. Two different clinicians (A and B) performed the same procedures using One-Step in a parallel study. Using One-Step, clinician A obtained a large number of zero bonds in superficial dentin but fewer in deep dentin. This resulted in a very large standard deviation in bond strengths (mean +/- SD of 22 +/- 20 MPa in superficial dentin acid 27 +/- 14 MPa in deep dentin). Clinician B obtained much higher (p < 0.001) and more uniform bond strengths with One-Step (56 +/- 13 MPa in superficial dentin and 57 +/- 12 MPa in deep dentin). With MacBond, there were no zero bonds and hence less variation, with a mean of 41 +/- 13 MPa in superficial dentin and 27 +/- 12 MPa ((x) over bar +/- SD) in deep dentin. When pairs of Z100 resin composite cylinders were bonded together with One-Step and then sectioned into an array, there was little variation in regional bond strength (37 +/- 1 MPa). Dividing bonded resin composite buildups into an array of 20 to 30 1 x 1 x 8 mm beams allows for the evaluation of uniformity of resin-dentin bonds. The method used in this study detected local regional differences in resin-dentin bond strengths. The largest differences were shown to be related to technique rather than to material. The results indicate that resin-dentin bonds may not be as homogenous as was previously thought.