Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Jeongneung 3-dong, Seongbuk-gu, Seoul 136-703, Republic of Korea.
J Dent. 2012 Nov;40(11):979-88. doi: 10.1016/j.jdent.2012.08.004. Epub 2012 Aug 11.
This study examined the wear resistance of human enamel and feldspathic porcelain after simulated mastication against 3 zirconia ceramics, heat-pressed ceramic and conventional feldspathic porcelain.
Human teeth and feldspathic porcelain cusp were tested against ceramic discs. 5 brands were tested - 3 monolithic zirconia, Prettau, Lava, and Rainbow, one lithium disilicate, IPS e.max Press, and one feldspathic porcelain, Vita-Omega 900. The surface was polished using a 600 grit and 1200 grit SiC paper. Each group was loaded for 300,000 cycles in a chewing simulator. The wear resistance was analyzed by measuring the volume of substance lost. The wear surfaces were observed by scanning electron microscopy to determine the wear characteristics.
Vita-Omega 900 led to the greatest amount of enamel wears followed by IPS e.max Press, Prettau, Lava and Rainbow. There was a significant difference between Vita-Omega 900 and IPS e.max Press (p<0.05). The wear values for human enamel were significantly greater than those for feldspathic porcelain, regardless of the surface roughness of the ceramic specimens (p<0.05).
The wear behaviour of human enamel and feldspathic porcelain varies according to the type of substrate materials. On the other hand, 3 zirconia ceramics caused less wear in the abrader than the conventional ceramic.
Dental professionals should be aware of the wear effect of dental restorations on the opposing teeth or restorations. The amount of enamel wear was highest in feldspathic porcelains whereas zirconia ceramics caused less wear on the opposing teeth.
本研究比较了三种氧化锆陶瓷、热压铸陶瓷和传统长石瓷对人牙釉质和长石瓷牙尖的耐磨损性能。
用人牙和长石瓷牙尖对陶瓷片进行测试。测试了 5 种品牌，分别为三种整体氧化锆陶瓷（Prettau、Lava 和 Rainbow）、一种锂硅二酸盐（IPS e.max Press）和一种长石瓷（Vita-Omega 900）。用 600 目和 1200 目碳化硅砂纸对表面进行抛光。每组在咀嚼模拟器中加载 30 万次循环。通过测量物质损失的体积来分析耐磨性。用扫描电子显微镜观察磨损表面，以确定磨损特性。
Vita-Omega 900 导致牙釉质磨损最大，其次是 IPS e.max Press、Prettau、Lava 和 Rainbow。Vita-Omega 900 和 IPS e.max Press 之间有显著差异（p<0.05）。无论陶瓷标本表面粗糙度如何，人牙釉质的磨损值都明显大于长石瓷（p<0.05）。
人牙釉质和长石瓷的磨损行为随基底材料类型而异。另一方面，三种氧化锆陶瓷对磨料的磨损小于传统陶瓷。
牙科医生应该注意牙齿修复体对对颌牙或修复体的磨损效应。长石瓷的牙釉质磨损量最高，而氧化锆陶瓷对对颌牙的磨损最小。
