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首页> 外文会议>International Conference on Materials Science and Technology >Shear Bond Strength of Resin Cement to Saliva-Contaminated Metal Alloys after Various Surface Treatments
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Shear Bond Strength of Resin Cement to Saliva-Contaminated Metal Alloys after Various Surface Treatments

机译：各种表面处理后树脂水泥对唾液污染金属合金的剪切粘合强度

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The bonding ability of resin cement to metal alloys of conventional dental restorations is critical for the retention and long-term survival rate. Contaminated saliva during try-in process which is resistant to simple water rinsing could reduce bond strength. Surface treatment before cementation might have an important role in optimizing resin-metal bond strength. The purpose of this study was to study the effect of surface pretreatment on the shear bond strength of dental base metal alloys after saliva contamination using a self-adhesive resin cement. Forty dental wax patterns (7-mm diameter) were made and cast with dental base metal alloy (Argeloy N.P. (V)). Cast metal specimens were embedded in PVC tube using self-curing acrylic resin and then flattened with 600-grit silicon carbide paper. PVC tube holders were specifically designed for the shear bond strength test device. Forty resin composite specimens were prepared in plastic mold (diameter of 3 mm and depth of 3 mm). The resin composite specimens were treated with sandblasting. Fifty-urn aluminum oxide particle was blasted for 10 seconds from the distance of approximately 5 mm perpendicular to the bonding surface. Metal alloy specimens were immersed in artificial saliva for 1 minute and rinsed with water-spray for 15 seconds. The specimens were also air-dried for 15 seconds. Specimens were divided into four groups, which received one of the following surface treatments: (1) No surface treatment (Control), (2) 37% phosphoric acid, (3) 37% phosphoric acid and then rinsed with 70% ethyl alcohol, and (4) 70% ethyl alcohol. After rinsing and drying, the resin composite specimens were cemented with Panavia SA Cement (Kuraray Noritake Dental Inc., Okayama, Japan) at the center of metal alloy specimens followed by the manufacturer's instruction. Before testing, the specimens were stored in distilled water at 37°C for 24 hours. For testing, specimens were dried and mounted to universal testing machine (EZ-S, Shimadzu Co., Kyoto, Japan) at the crosshead speed of 1 mm/minute. Failure loads was recorded in Newton (N) and then analyzed to Mega Pascal (MPa). The highest shear bond strength was observed for group 2 and 3. The failure mode in all the materials was adhesive failure which occurred at the resin-metal interface. Within the limitations of this study, phosphoric acid was effective in removing saliva contamination and enhancing bond strength at the resin-dental base metal interface.
机译：树脂水泥对常规牙科修复物金属合金的粘合能力对于保持和长期存活率至关重要。在试验过程中受污染的唾液，耐用简单的水漂洗可以降低粘合强度。在胶粘剂之前的表面处理可能在优化树脂金属粘合强度方面具有重要作用。本研究的目的是研究使用自粘树脂水泥在唾液污染后牙科碱金属合金剪切粘合强度的影响。用牙科贱金属合金制备和铸造四十牙科蜡图案（直径为7毫米）（Argeloy N.P.（V））。使用自固化丙烯酸树脂嵌入PVC管中铸造金属样品，然后用600粒碳化硅纸扁平。 PVC管保持器专为剪切粘结强度试验装置而设计。以塑料模具（直径为3mm和3mm）制备四十树脂复合标本。树脂复合标本用喷砂处理。从垂直于粘合表面的约5mm的距离，将五十urn氧化铝颗粒喷出10秒。将金属合金标本浸入人造唾液中1分钟并用喷水冲洗15秒。样品也空气干燥15秒。将试样分为四组，该组接受以下表面处理之一：（1）无表面处理（对照），（2）37％磷酸，（3）37％磷酸，然后用70％乙醇冲洗，然后用70％乙醇冲洗， （4）70％乙醇。在漂洗和干燥后，在金属合金标本的中心，树脂复合标本用Panavia SA水泥（Kuraray Noritake Dental Inc.，冈山，日本）巩固，然后是制造商的指示。在测试之前，将试样在37℃下储存在蒸馏水24小时。对于测试，将标本干燥并安装在1mm /分钟的十字头速度下的通用测试机（EZ-S，Shimadzu Co.，Kyoto，Japan）。故障负载被记录在牛顿（n）中，然后分析到Mega Pascal（MPA）。对于第2组和3，观察到最高剪切粘合强度。所有材料中的失效模式是在树脂 - 金属界面发生的粘合剂衰竭。在该研究的局限内，磷酸可有效地去除唾液污染和增强树脂底座金属界面处的粘合强度。

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