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首页> 外文期刊>The Journal of Prosthetic Dentistry >Evaluation of adhesion of chairside hard relining materials to denture base polymers.
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Evaluation of adhesion of chairside hard relining materials to denture base polymers.

机译：评估椅背硬衬材料对义齿基础聚合物的附着力。

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STATEMENT OF PROBLEM: Removable denture bases are made of modified poly(methyl methacrylate) (PMMA), which has reliable bond strength with resins containing methyl methacrylate (MMA). However, some hard relining materials with different chemical compositions have been reported to have less than adequate bond strength to PMMA denture base polymers. PURPOSE: This in vitro study evaluated the initial bonding properties of chairside hard relining materials to different removable denture base polymers, as well as the structure of the interface. MATERIAL AND METHODS: The tensile strength (MPa) of adhesion of 8 chairside hard relining materials (Original Truliner, GC Reline Hard, Ufigel Hard, Triad Reline, New Truliner, Light Liner, Astron LC Hard, and Flexacryl Hard) was tested against 3 denture base polymers (Ivocap Plus, Paladon 65, and Palapress Vario). Dumbbell-shaped specimens with a 6-mm diameter of bonding surface were used for tensile testing of bond strength (n=5). An MMA containing hard relining material (Original Truliner) was used as a control. Tensile strength of the bond was calculated using the bonding area and maximum force under tension. Statistical analyses of data were conducted with 2-way analysis of variance (alpha=.05). The influence of the bonding agents and the relining materials on the PMMA denture base surface layer and its structure were investigated. The depths of the swollen layers were measured with a transmission light microscope. Fracture surfaces after testing were also visually evaluated. Chemical analyses of all materials prior to testing were performed using high-performance liquid chromatography. RESULTS: Significant differences were found among tensile bond strengths of chairside hard relining materials to PMMA denture base polymers forming 3 different groups (P<.001). No significant difference among different denture base polymers was found with regard to tensile strength of adhesion (P=.918), but the interaction term between hard relining material and denture base polymer was found to be significant (P<.001). The tensile bond strength of the relining materials and denture base polymers was found to range from 8% to 60% of the strength of the PMMA denture base polymers. CONCLUSION: The chemical composition of the bonding agents and the relining materials and their combinations affected the depth of the swollen layers of the denture base polymers and the tensile strength of adhesion.
机译：问题陈述：可摘义齿基托由改性聚甲基丙烯酸甲酯（PMMA）制成，与含甲基丙烯酸甲酯（MMA）的树脂具有可靠的粘合强度。然而，据报道，一些具有不同化学组成的硬质衬里材料对PMMA义齿基料聚合物的粘合强度不足。目的：这项体外研究评估了椅背硬质衬里材料与不同的可摘义齿基础聚合物的初始粘合性能，以及界面的结构。材料和方法：测试了8种椅子硬质衬里材料（原始Truliner，GC Reline Hard，Ufigel Hard，Triad Reline，New Truliner，Light Liner，Astron LC Hard和Flexacryl Hard）的粘合拉伸强度（MPa）。义齿基础聚合物（Ivocap Plus，Paladon 65和Palapress Vario）。粘结表面直径为6毫米的哑铃形样品用于粘结强度的拉伸测试（n = 5）。含有硬质衬里材料的MMA（原始Truliner）用作对照。使用粘结面积和拉伸时的最大力计算粘结的拉伸强度。数据的统计分析是通过2方差分析（alpha = .05）进行的。研究了粘合剂和衬里材料对PMMA义齿基托表面层及其结构的影响。用透射光显微镜测量溶胀层的深度。还目测评估了测试后的断裂表面。在测试之前，所有材料的化学分析均使用高效液相色谱仪进行。结果：椅子旁硬衬里材料与形成3个不同组的PMMA义齿基托聚合物的拉伸粘合强度之间存在显着差异（P <.001）。就粘合的拉伸强度而言，在不同的义齿基础聚合物之间没有发现显着差异（P = .918），但发现硬衬材料与义齿基础聚合物之间的相互作用项是显着的（P <.001）。发现衬里材料和义齿基料聚合物的拉伸粘结强度为PMMA义齿基料聚合物强度的8％至60％。结论：粘合剂和衬里材料的化学成分及其组合影响了义齿基础聚合物溶胀层的深度和粘合的拉伸强度。

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