The microtensile bond test: a review.
The microtensile bond test: a review.
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发表时间：
1999
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通讯作者：
D. Pashley;R. Carvalho;H. Sano;M. Nakajima;M. Yoshiyama;Y. Shono;C. Fernandes;F. Tay
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作者：
D. Pashley;R. Carvalho;H. Sano;M. Nakajima;M. Yoshiyama;Y. Shono;C. Fernandes;F. Tay
目的本综述的目的是在一篇论文中描述微拉伸粘结试验的各种修改，以便研究人员能够选择最适合他们需要的修改。方法微拉伸试验的实质是将树脂粘结的牙齿分成0.5~1.0 mm厚的板材，然后进行修剪，使拉力在测试过程中集中在粘结界面上。这项技术的诸多优点之一是，每颗牙齿可以产生多个样本。此外，不需要基质来限制结合的表面面积，因为该面积由修剪后的试件的尺寸确定。结果采用不同的微拉伸试验方法，测量了牙合牙本质、牙冠外表面、根管内表面、根尖1/3、正常牙本质与龋病牙本质、正常牙本质与硬化牙本质之间的粘结强度差异。这项技术是评估树脂-硬组织粘结剂长期耐久性的理想方法。结论微拉伸试验方法具有常规方法所不能达到的通用性。它比传统的测试更劳动密集型，但在洞察修复材料与临床相关部位和基质的粘连强度方面具有巨大的潜力。
PURPOSE The purpose of this review is to describe all of the various modifications of the microtensile bond test in one paper, so that investigators can select the modification that best suits their needs. METHODS The essence of the microtensile test is the division of resin-bonded teeth into slabs between 0.5 and 1.0 mm thick that are then trimmed in such a manner that tensile force will be concentrated on the bonded interface during testing. Among the many advantages of the technique are that each tooth produces multiple specimens. Further, there is no need for a matrix to limit the bonded surface area, since the area is determined by the dimensions of the trimmed specimens. RESULTS The various modifications of the microtensile test have been used to measure differences in regional bond strength across occlusal dentin, down the external surface of teeth from crown through roots, down the internal surface of root canals from cervical to apical thirds, as well as to compare normal vs caries-affected occlusal dentin and normal vs sclerotic cervical dentin. The technique is ideal for evaluating the long-term durability of resin-hard-tissue bonds. CONCLUSION The microtensile test methods offer versatility that cannot be achieved by conventional methods. It is more labor-intensive than conventional testing, but holds great potential for providing insight into the strength of adhesion of restorative materials to clinically relevant sites and substrates.