氧化锆及4种全冠修复材料磨耗性能的对比(英文)  

Wearing ability of zirconia and four kinds of full crown repair materials: Comparative study

作　　者：王军[1] 王明臻 王万春 扬梅 

机构地区：[1]青岛大学医学院,山东省青岛市266021 [2]青岛市口腔医院,山东省青岛市266001

出　　处：《中国组织工程研究》2013年第25期4601-4608,共8页Chinese Journal of Tissue Engineering Research

摘　　要：背景:氧化锆陶瓷是近年来新兴的一种口腔修复材料,因其美观性及生物相容性好而受到患者的欢迎,但目前关于其与对颌天然牙磨耗性能方面的研究较少。目的:观察氧化锆与其他4种临床常用的全冠修复材料与滑石瓷对磨时对其造成的体积损失量,并与天然牙比较,研究氧化锆及另外4种修复材料的磨耗差异。方法:将氧化锆陶瓷,vita陶瓷,金钯合金,镍铬合金,钴铬合金及对照组天然牙釉质作为上试件,分别安装于磨耗机上部夹具中,将滑石瓷作为下试件,分别安装于磨耗机下部夹具中,在人工唾液环境下进行加载磨耗实验,计算上下试件的体积损失量;使用纤维硬度测试仪对上述试件进行硬度测试;扫描电镜下观察试件表面磨耗形态。结果与结论:5种材料所致的滑石瓷体积损失量均大于对照组滑石瓷体积损失量(P<0.05);氧化锆陶瓷硬度值最高,自身及对磨滑石瓷体积损失量最大;金钯合金硬度值最小,自身及对磨滑石瓷体积损失量最接近天然牙;5种材料的硬度与其导致的对磨滑石瓷体积损失量呈显著正相关(P<0.05)。氧化锆及vita陶瓷主要为磨粒磨损,表面沟裂突起样结构明显、磨耗犁沟深、形态不规则,磨耗面可见散在气孔结构。钴铬合金磨耗面相对光滑,表面磨耗犁沟较浅,磨耗面散在金属磨粒;镍铬合金磨耗犁沟深而宽,磨耗面存在大量金属磨粒;金钯合金磨耗犁沟均匀分布,偶见剥脱斑块,斑块内金属磨粒附着。表明氧化锆陶瓷在临床中容易造成对颌天然牙的过度磨耗,永久黏固前应对其进行精细抛光;金钯合金的磨耗性能与天然牙最接近且最优,是较好的后牙区全冠修复材料;口腔修复材料的硬度值不能代表其磨耗性能大小,应综合考虑材料表面的微观结构等因素,采取措施发挥各种材料优势。BACKGROUND： Zirconia ceramics is a novel oral repair material in recent years, and it has welcomed by patients because of its aesthetics and biocompatibility, but the research on the wearing ability of zirconia ceramics on the jaw natural tooth is rare. OBJECTIVE： To observe the volume loss of zirconia ceramics and other four kinds of clinical commonly used full crown repair materials when grinding with steatite, and to compare with the natural tooth in order to research the wearing ability of zirconia and other repairing materials. METHODS： The zirconia ceramic, vita ceramics, gold-palladium alloy, nickel-chromium alloy, cobalt-chromium alloy and fresh natural enamel in the control group were installed in the upper fixture of wear machine respectively, and the steatite porcelain was installed in the lower fixture. Load abrasion tests were performed in artificial saliva environment, and then the volume loss of the materials in the upper and lower fixture was calculated; the hardness of the materials above was tested with fiber hardness testing machine; the specimen surface abrasion morphology was observed under scanning electron microscope. RESULTS AND CONCLUSION： The volume loss of the five materials when grinding with steatite was larger than that of the fresh natural enamel in the control group （P 〈 0.05）; the hardness of zirconia ceramics was highest, and the volume loss of zirconia ceramics when grinding with steatite was largest. The gold-palladium alloy had the smallest hardness, and the volume loss of gold-palladium alloy when grinding with steatite was similar to that of the natural teeth; the hardness of all the materials was positively correlated with the volume loss of grinding steatite porcelain （P 〈 0.05）. The zirconia ceramic and vita ceramic were mainly performed as abrasive wear, and the surface was in fissure protruding-like structure with deep abrasion furrows and irregular morphology, the scattered pore structure could be seen on the abrasion surface. The abrasion surface o

关 键 词：生物材料 组织工程口腔材料 氧化锆 金钯合金 镍铬合金 钴铬合金 牙釉质 磨耗 硬度 耐磨性 

分 类 号：R318[医药卫生—生物医学工程]