有机无机杂化膜对义齿树脂基托颜色稳定性影响的研究

发布时间：2018-07-21 16:44

【摘要】：聚甲基丙烯酸甲酯具有良好的理化性能及易于加工成型等优点，被广泛应用于口腔义齿树脂基托的制作。义齿基托树脂根据其固化方式不同可分为三大类:加热固化型、室温固化型和光固化型。其中，加热固化型基托树脂是最常用的基托材料。义齿基托树脂长期暴露在口腔环境中，会出现不同程度的着色及变色影响修复效果。义齿树脂基托颜色的改变是材料老化和损坏的指征,也是人们更换义齿最常见的原因之一。此外，义齿树脂基托在口腔环境中具有一定的吸水性和溶解性，而有研究发现材料的着色与水分子的吸收有关，水分子可作为载体携带染色剂，因此，树脂基托的吸水值及溶解值较高会加重材料着色，并影响义齿材料的尺寸稳定性、力学性能和生物安全性等性能，严重影响到基托的品质及患者的健康。本研究合成了一种有机无机杂化膜。由正硅酸乙酯和缩水甘油醚基丙基三甲氧基硅烷共水解缩合制得杂化硅溶胶；由甲基丙烯酸甲酯、丙烯酸和甲基丙烯酸缩水甘油酯共聚制得聚合物。两者利用KH560和GMA中的环氧基团进行交联，形成具有互穿网络结构的杂化膜。然后，将杂化膜应用在义齿树脂基托表面，对膜层的红外光谱、铅笔硬度、附着力和抗破裂性等进行表征。选取4种常用的热凝义齿树脂基托材料制作树脂试片，每种试片随机分为覆膜实验组和对照组。分别对实验组和对照组试片的吸水值、溶解值及光泽度值进行测试；并对实验组和对照组试片在不同有色溶液中浸泡不同时间后的颜色变化ΔE进行测试，对实验结果进行统计学分析，以探讨有机无机杂化膜对义齿树脂基托性能的影响。实验结果表明，有机无机杂化涂料聚合完全，铅笔硬度可达到5H，与树脂试片的附着力及抗破裂性达到最高等级；实验组吸水值及溶解值显著低于对照组（P0.05）;实验组光泽度值显著高于对照组（P0.05）；85%实验组树脂试片的ΔE值显著低于对照组（P0.05），且在对照组中，树脂品牌、浸泡溶液以及浸泡时间三者之间存在交互作用，而实验组，树脂品牌、浸泡溶液以及浸泡时间三者之间的不存在交互作用。由此可得出结论：有机无机杂化膜不仅具有良好的力学性能，还降低了基托树脂的吸水值和溶解值，提高了基托树脂的颜色稳定性及光泽度，最终提高基托综合性能。
[Abstract]:Poly (methyl methacrylate) has been widely used in the manufacture of dental denture resin base because of its good physical and chemical properties and easy processing and molding. Denture base resin can be divided into three categories according to its curing mode: heating curing, room temperature curing and light curing. Among them, the heating curing base resin is the most commonly used base material. When denture base resin is exposed to oral environment for a long time, different degree of coloring and discoloration will affect the effect of restoration. The change of color of denture resin base is the indication of material aging and damage, and it is also one of the most common reasons for replacement of denture. In addition, denture resin base has a certain water absorption and solubility in oral environment. However, it has been found that the coloring of materials is related to the absorption of water molecules, which can be used as carriers to carry dye agents. The higher water absorption and dissolution value of the resin base will aggravate the coloring of the material, and affect the dimensional stability, mechanical properties and biological safety of the denture material, and seriously affect the quality of the base and the health of the patients. In this study, an organic and inorganic hybrid membrane was synthesized. Hybrid silica sol was synthesized by co-hydrolysis and condensation of ethyl orthosilicate and glycidyl ether propyl trimethoxysilane, and the polymer was synthesized by copolymerization of methyl methacrylate, acrylic acid and glycidyl methacrylate. They were crosslinked by epoxy groups in KH 560 and GMA to form hybrid membranes with interpenetrating network structure. Then, the hybrid film was applied to the denture resin base surface to characterize the infrared spectrum, pencil hardness, adhesion and fracture resistance of the film. Four kinds of common thermosetting denture resin base materials were selected to make resin specimens. Each specimen was randomly divided into two groups: the film coated experimental group and the control group. The water absorption value, dissolution value and gloss value of the experimental group and the control group were tested respectively, and the color change 螖 E of the experimental group and the control group were tested after immersion in different colored solution for different time. The effect of organic and inorganic hybrid film on the properties of denture resin base was analyzed statistically. The results showed that the organic and inorganic hybrid coatings were polymerized completely, the hardness of pencils could reach 5H, and the adhesion and cracking resistance of the coatings with resin were the highest. The values of water absorption and solubility in the experimental group were significantly lower than those in the control group (P0.05), the gloss value of the experimental group was significantly higher than that of the control group (P0.05), and the 螖 E value of the resin specimen of the experimental group was significantly lower than that of the control group (P0.05). There was interaction between immersion solution and soaking time, but there was no interaction among experimental group, resin brand, immersion solution and soaking time. It is concluded that the organic-inorganic hybrid film not only has good mechanical properties, but also reduces the water absorption and dissolution value of the base resin, improves the color stability and glossiness of the base resin, and finally improves the comprehensive properties of the base resin.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：R783.6

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