Koppang R, Berg E, Dahm S, Real C, Fløystrand F
Department of Preclinical Techniques and Material Sciences, Dental Faculty, University of Oslo, Norway.
J Prosthet Dent. 1995 May;73(5):486-91. doi: 10.1016/s0022-3913(05)80080-0.
An in vitro test is described that simulates the in vivo fate of a denture adhesive, namely destruction, dilution, and dissolution of the adhesive, by repeated measurement of tensile bond strength for the adhesive in isotonic saline over time. The bond strengths were measured under two different settings of the testing machine. The main compositions of three denture adhesive pastes, Fittydent, Fixodent, and Super Poli-Grip and one powder adhesive, Super Wernet's, were determined by infrared spectroscopy. The tensile bond strengths of these adhesives and those of pure tragacanth gum were subjected to a three-way analysis of variance. The Fittydent and Super Poli-Grip adhesives exhibited the best results over time. The most appropriate of the described methods for testing denture adhesives seem useful; however, when seen in relation to the results of a published clinical study where the patients were asked to evaluate the retention and the duration of some of these adhesives, there are indications that the clinical validity of the method might be improved if paste adhesives are tested at temperatures above 35 degrees C.
本文描述了一种体外试验，该试验通过随时间重复测量义齿粘合剂在等渗盐水中的拉伸粘结强度，来模拟义齿粘合剂在体内的命运，即粘合剂的破坏、稀释和溶解。在试验机的两种不同设置下测量粘结强度。通过红外光谱法测定了三种义齿粘合剂糊剂（Fittydent、Fixodent和Super Poli-Grip）和一种粉末粘合剂（Super Wernet's）的主要成分。对这些粘合剂和纯黄芪胶的拉伸粘结强度进行了三因素方差分析。随着时间的推移，Fittydent和Super Poli-Grip粘合剂表现出最佳效果。所描述的义齿粘合剂测试方法中最合适的方法似乎是有用的；然而，从一项已发表的临床研究结果来看，在该研究中要求患者评估其中一些粘合剂的固位力和持续时间，有迹象表明，如果在高于35摄氏度的温度下测试糊剂粘合剂，该方法的临床有效性可能会提高。
