| 杨瑞,张修银,韩智慧.三种基底材料的吸水膨胀性实验研究[J].口腔材料器械杂志,2013,22(4):200-202. |
| 三种基底材料的吸水膨胀性实验研究 |
| experimental study of volume expansion of three substrate materials due to water sorption |
| 投稿时间：2013-07-08 修订日期：2013-08-20 |
| DOI：10.11752/j.kqcl.2013.04.09 |
| 中文关键词: 牙本质 自凝塑料 光固化树脂 吸水膨胀性 尺寸稳定性 |
| 英文关键词:Dentin Self-curing PMMA Light-cured resin Volume expansion Dimensional Stability |
| 基金项目:国家自然科学基金资助项目(项目编号:81070857) |
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| 中文摘要: |
| 目的: 研究3种基底材料的吸水膨胀性,探讨其在潮湿环境下的尺寸稳定性。方法: 将牙本质、自凝塑料及光固化树脂三种基底材料分别制成8mm×8mm×2mm的立方体片。每种材料6个试件,浸泡于蒸馏水中,并测量浸泡前和浸泡7d、28d、3个月后的体积,分别计算浸泡前后各时间点材料的吸水膨胀率,采用SPSS13.0软件对数据进行单因素方差分析。结果: 经过7d、28d、3个月浸泡后,牙本质体积膨胀率分别为1.08%、3.24%、3.65%;自凝塑料为2.93%、5.81%、7.69%光固化树脂为1.65%、4.63%、6.13%。每个时期的吸水膨胀率从大到小依次为自凝塑料、光固化树脂和牙本质。28d时三种材料与其各自7d时的体积膨胀率相比均有明显增高(P<0.05),而各组材料在其28d和3个月时的体积变化率相比均无统计学差异(P>0.05)。3个月时三种材料均已基本达到体积稳定。结论: 牙本质的吸水膨胀率最小,在全瓷材料的实验研究中把新鲜离体牙作为其基底材料可能是较好的选择。 |
| 英文摘要: |
| Objective: The study was to investigate the volume expansion of human dentin, self-curing polymethyl methacrylate(PMMA)resin and light-cured resin resulting from water sorption an evaluate their dimension stability in wet environment. Methods: Three materials were tested in the study: human dentin, self-curing PMMA resin and light-cured resin. Six specimens with the size of 8mm×8mm×2 mm of each material were prepared. The volume of the specimen was measured before it was immersed in water and atfer 7days, 28days'and 3months'water storages at 37°Crespectively. The percentage of volume expansion of the specimen was calculated and the data were analyzed withone-wayAOVA analysis by SPSS 13.0s of tware. Results: The percentages of volume expansion atfer 7 days, 28 days and 3months of water storage were 1. 08%, 3.24% and 3.65% respectively for the human dentin; 2.93%, 5.81% and 7.69% forth PMMA, and 1. 65%, 4.63% and 6.13% for the light-cured resin. The percentages of volume expansion indescending order were:the PMMA resin, the light-cured resin and the human dentinin each period. For all of the three materials, there was significant difference (P<0.05)between the percentage of volume expansion after 7days'water storage and that atfer 28 days'water storage. While there was nosignific and difference between the percentage of volume expansion after 28 days'water storage and that atfter 3 months'waters torage(P>0.05). The dimensions of the three materials tended to be stable after three months's to rage. Conclusion: The percentage of volume expansion of human dentin was the minimum and it may be a better choice to select the fleshly extracted teeth as the base materials in the study of all-ceramic materials. |
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