Abstract The main aim of the present study was to evaluate the micro-scale abrasion and sliding wear behavior of a zirconium-lithium silicate (ZLS) glass-ceramic and a polymer-infiltrated ceramic network used in dentistry. Samples were assessed on a reciprocating ball-on-plate tribometer at 30 N normal load, 1 Hz and stroke length of 2 mm. The wear sliding tests were carried out against an alumina ball in artificial saliva at 37 °C. Also, micro-scale abrasion tests were performed in the presence of abrasive particles to simulate three-body abrasion conditions. The micro-scale abrasion tests were performed at 60 rpm on 0.8 N normal load for 600 revolutions of a stainless-steel ball in contact with a suspension of hydrated silica particles. After wear tests, the worn surfaces were inspected by scanning electron microscopy (SEM). Abrasion was the main wear mechanism found during the tests. However, the hybrid ceramic revealed an unstable adhesive tribo-layer, associated with a delamination process. The wear volume mean values recorded after the micro-abrasion tests were significantly higher for the polymer infiltrated ceramic network (~1.44 x10-1 mm3) than those for the ZLS glass-ceramic (~9.89 x10-2 mm3). Also, the mean values of specific sliding wear rate were higher for the polymer-infiltrated ceramic network (~5.33 x10-5 mm3/N.m) than those for the ZLS glass-ceramic ZL(~3.17 x10-5 mm3/N.m). For all test conditions, zirconium-lithium glass-ceramic revealed higher wear resistance and lower friction coefficient when compared to the polymer-infiltrated ceramic network. The findings indicated a less damage of glass-ceramics in comparison to polymer-matrix composites on sliding loading or micro-scale abrasion that can occur during the masticatory process.

中文翻译：

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牙科用锆锂硅酸盐微晶玻璃陶瓷和聚合物渗透陶瓷网络的微尺度磨损和滑动磨损

摘要 本研究的主要目的是评估用于牙科的硅酸锆锂 (ZLS) 玻璃陶瓷和聚合物渗透陶瓷网络的微尺度磨损和滑动磨损行为。在 30 N 法向载荷、1 Hz 和 2 mm 冲程长度下，在往复式球盘摩擦计上评估样品。在 37 °C 的人工唾液中对氧化铝球进行磨损滑动试验。此外，在磨粒存在下进行了微观磨损测试，以模拟三体磨损条件。微尺度磨损测试是在 60 rpm 和 0.8 N 法向载荷下进行，不锈钢球与水合二氧化硅颗粒悬浮液接触 600 转。磨损试验后，通过扫描电子显微镜（SEM）检查磨损表面。磨损是测试过程中发现的主要磨损机制。然而，混合陶瓷显示出不稳定的粘附摩擦层，与分层过程相关。微磨损测试后记录的磨损体积平均值对于聚合物渗透陶瓷网络 (~1.44 x10-1 mm3) 显着高于 ZLS 微晶玻璃 (~9.89 x10-2 mm3)。此外，聚合物渗透陶瓷网络的比滑动磨损率平均值（~5.33 x10-5 mm3/Nm）高于 ZLS 微晶玻璃 ZL（~3.17 x10-5 mm3/Nm）。在所有测试条件下，与聚合物渗透陶瓷网络相比，锆锂微晶玻璃显示出更高的耐磨性和更低的摩擦系数。