Department of Applied Prosthodontics, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
J Adhes Dent. 2010 Jun;12(3):223-9. doi: 10.3290/j.jad.a17550.
The shear bond strength of an auto-polymerizing poly(methyl methacrylate) denture base resin material to cast titanium and cobalt-chromium alloy treated with six conditioning methods was investigated.
Disk specimens (10 mm in diameter and 2.5 mm in thickness) were cast from pure titanium and cobalt-chromium alloy. The specimens were wet ground to a final surface finish of 600 grit, air dried, and treated with the following bonding systems: 1) air abraded with 50-70-microm-grain alumina (SAN); 2) air abraded with 50-70-microm-grain alumina + conditioned with Alloy Primer (ALP); 3) air abraded with 50-70-microm-grain alumina + conditioned with AZ Primer (AZP); 4) air abraded with 50-70-microm-grain alumina + conditioned with Estenia Opaque Primer (EOP); 5) air abraded with 50-70-microm-grain alumina + conditioned with Metal Link Primer (MLP), and 6) treated with ROCATEC system (ROC). A denture base material (Palapress Vario) was then applied to each metal specimen. Shear bond strengths were determined before and after 10,000 thermocycles.
The strengths decreased after thermocycling in all combinations. Among the treatment methods assessed, groups 2 and 4 showed significantly (p < 0.05) enhanced shear bond strengths for both metals. In group 4, the strength in MPa (n = 7) after thermocycling for cobalt-chromium alloy was 38.3, which was statistically (p < 0.05) higher than that for cast titanium (34.7).
Air abrasion followed by the application of two primers containing a hydrophobic phosphate monomer (MDP) effectively improved the strength of the bond of denture base material to cast titanium and cobalt-chromium alloy.
研究了 6 种预处理方法对自凝聚甲基丙烯酸甲酯义齿基托树脂与铸造钛和钴铬合金的剪切结合强度的影响。
从纯钛和钴铬合金铸造出直径为 10mm、厚度为 2.5mm 的圆盘试件。将试件湿磨至最终表面粗糙度为 600 目，风干后用以下粘结系统处理：1）用 50-70μm 氧化铝喷砂（SAN）；2）用 50-70μm 氧化铝喷砂+用合金底漆（ALP）预处理；3）用 50-70μm 氧化铝喷砂+用 AZ 底漆（AZP）预处理；4）用 50-70μm 氧化铝喷砂+用 Estenia 不透明底漆（EOP）预处理；5）用 50-70μm 氧化铝喷砂+用金属链接底漆（MLP）预处理；6）用 ROCATEC 系统（ROC）处理。然后将义齿基托材料（Palapress Vario）应用于每种金属试件。在进行 10000 次热循环前后测定剪切结合强度。
所有组合在热循环后强度均降低。在所评估的处理方法中，第 2 组和第 4 组对两种金属的剪切结合强度均有显著提高（p<0.05）。在第 4 组中，钴铬合金经热循环后的强度（n=7）为 38.3MPa，统计学上（p<0.05）高于铸造钛（34.7MPa）。
空气喷砂后应用含有疏水性磷酸单体（MDP）的两种底漆可有效提高义齿基托材料与铸造钛和钴铬合金的粘结强度。
