Sliding Contact Fatigue of Graded Zirconia with External Esthetic Glass
Sliding Contact Fatigue of Graded Zirconia with External Esthetic Glass
复制标题
DOI：
10.1177/0022034511412075
复制
发表时间：
2011-09-01
影响因子：
7.6
通讯作者：
Zhang, Y.
中科院分区：
文献类型：
--
作者：
Ren, L.;Janal, M. N.;Zhang, Y.
瓷贴面剥落和断裂是氧化锆牙科修复体的常见失效模式。我们假设，相对于瓷贴面氧化锆，梯度玻璃/氧化锆/玻璃与外部美学玻璃（e-GZG）可以延长寿命并提高对贴面碎裂和断裂的抵抗力，同时提供必要的美学效果。以前，我们已经证明，梯度玻璃氧化锆表面具有优良的抗咬合滑动接触疲劳。在这里，我们研究了这种梯度玻璃氧化锆表面与外部美学玻璃的滑动接触疲劳响应。这种外部玻璃对于色调选择、防止对向牙列过度磨损以及保护Y-TZP免受水热降解至关重要。将e-GZG板粘合到复合材料块上，并在水中以200 N进行长达1000万次的长期滑动接触。滑动接触疲劳的e-GZG匹配的单片Y-TZP，这两种材料表现出的寿命是数量级长于瓷贴面氧化锆。梯度e-GZG是一种很有前途的修复材料。
Veneer chipping and fracture are common failure modes for porcelain-veneered zirconia dental restorations. We hypothesized that the graded glass/zirconia/glass with external esthetic glass (e-GZG) can increase the lifetime and improve resistance to veneer chipping and fracture relative to porcelain-veneered zirconia, while providing necessary esthetics. Previously, we have demonstrated that a graded glass-zirconia surface possesses excellent resistance to occlusal-like sliding contact fatigue. Here, we investigated the sliding contact fatigue response of this graded glass-zirconia surface with external esthetic glass. This external glass is essential for shade options, for preventing excessive wear of opposing dentition, and for protecting Y-TZP from hydrothermal degradation. e-GZG plates were bonded to composite blocks and subjected to prolonged sliding contact up to 10 million cycles at 200 N in water. The resistance to sliding contact fatigue of e-GZG matches that of monolithic Y-TZP, and both of these materials demonstrated lifetimes that were orders of magnitude longer than that of porcelain-veneered zirconia. Graded e-GZG is a promising restorative material.