School of Dentistry/Biomaterials Science Research Group, University of Manchester, Manchester, UK.
J Prosthodont. 2010 Jun;19(4):258-62. doi: 10.1111/j.1532-849X.2009.00566.x. Epub 2010 Feb 19.
To evaluate shear bond strength of Molloplast-B soft liner attached to different acrylic surfaces (smooth, rough, and Sticktech net fiber-reinforced interfaces) after 3000 thermal cycles.
Sixty-nine specimens were fabricated by attaching Molloplast-B soft liner to acrylic bases of three interfaces (n= 23); smooth (Group 1, control), rough (Group 2), and Sticktech net fiber-reinforced interface (Group 3). The specimens underwent 3000 thermocycles (5 and 55 degrees C) before being subject to a shear bond test at 2 mm/min crosshead speed. Debonding sites were investigated using an optical microscope at 40x magnification. Bond failures were categorized as adhesive, cohesive, or mixed.
Mean (SD) bond strength values (MPa) were: 0.71 (0.15); 0.63 (0.07); and 0.83 (0.12) for smooth, rough, and fiber-reinforced acrylic interfaces, respectively. The mean values were analyzed using one-way ANOVA and Bonferroni post hoc test for pairwise comparisons (p< or = 0.05). The net fiber-reinforced acrylic interface exhibited a statistically significantly higher bond strength value when compared to smooth and rough acrylic interfaces (P= 0.003 and P= 0.000, respectively). Modes of failure were mainly cohesive (91%), followed by mixed failures (9%).
Molloplast-B exhibited a stronger bond to StickTech Net fiber-reinforced surfaces when compared to smooth and rough acrylic interfaces after thermocycling. This may enhance prosthesis serviceability during clinical use.
评估 Molloplast-B 软衬垫在经过 3000 次热循环后分别与不同丙烯酸表面（光滑、粗糙和 Sticktech 网纤维增强界面）黏附的剪切结合强度。
将 Molloplast-B 软衬垫附着在三个界面（n=23）的丙烯酸基底上制作 69 个样本：光滑（第 1 组，对照组）、粗糙（第 2 组）和 Sticktech 网纤维增强界面（第 3 组）。在 2mm/min 十字头速度下进行剪切结合试验之前，样本先经过 3000 次热循环（5℃和 55℃）。使用光学显微镜在 40x 放大倍数下观察离解部位。将黏合失败分类为黏附性、内聚性或混合性。
光滑、粗糙和纤维增强丙烯酸界面的平均（SD）黏合强度值（MPa）分别为：0.71（0.15）；0.63（0.07）和 0.83（0.12）。使用单因素方差分析和 Bonferroni 事后检验进行两两比较（p<0.05）分析平均值。与光滑和粗糙丙烯酸界面相比，纤维增强丙烯酸界面的净纤维增强表现出统计学上更高的黏合强度值（P=0.003 和 P=0.000）。失效模式主要是内聚性（91%），其次是混合性失效（9%）。
在经过热循环后，Molloplast-B 与 StickTech Net 纤维增强表面的黏附强度比光滑和粗糙丙烯酸界面更强。这可能会增强临床使用中义齿的耐用性。
