Time to abandon traditional bond strength testing?

摘要

In A. J. Kinlock's classic book "Adhesion and Adhe-sives - Science and Technology" published in 1987 by Chapman and Hall, adhesion is referred to as attraction between substrates. In Kinlock's book it also becomes evident that the level of adhesion forces operating across an interface cannot usually be measured by mechanical tests. Despite such a strong statement by a world leader in adhesion science, a large number of papers presented at scientific meetings and submitted to dental journals deal with different bond strength values. These papers tend to give the reader the impression that the property "bond strength" is an inherent material property. However, a closer look at the majority of these papers reveals that the measured strengths have standard deviation values often 25% and more of their mean strength values. If the strength values were true inherent values, such a large variability would not exist. Thus, the notion that bond strength values are inherent material properties is simply incorrect.