一种牙科瓷甲冠的力学与摩擦学特性
Mechanical and Tribological Characterization of a Dental Ceromer.
作者信息
Santos Mariana, Coelho Ana Sofia, Paula Anabela Baptista, Marto Carlos Miguel, Amaro Inês, Saraiva José, Marques Ferreira Manuel, Antunes Pedro, Carrilho Eunice
机构信息
Institute of Integrated Clinical Practice, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal.
Institute for Clinical and Biomedical Research (iCBR), Area of Environment, Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal.
出版信息
J Funct Biomater. 2020 Feb 21;11(1):11. doi: 10.3390/jfb11010011.
BACKGROUND
Indirect restorations using composites with ceramic fillings can be an alternative to ceramic veneering and direct composite restorations for the treatment of posterior teeth. The aim of this study was the evaluation of the mechanical and tribological properties of a ceromer.
MATERIALS AND METHODS
Sixty specimens were produced and divided into two groups: one control group not submitted to thermocycling (n = 20) and one test group submitted to 5000 cycles of thermocycling (n = 40). The studied parameters were microhardness, surface roughness and the coefficient of friction (scratch test).
RESULTS
The ceromer exhibits a reduction of polymerization shrinkage, higher wear, and fracture resistance than the composite resins. The studied ceromer presented good mechanical properties, even after being submitted to thermocycling. Roughness was the property most affected, increasing 25.8%, microhardness decreased by 10.5% and the coefficient of friction increased by 4.2%.
CONCLUSIONS
In certain situations, ceromers can be an alternative to composite resins and ceramics, providing an aesthetic, conservative and longevity option.
背景
使用含陶瓷填充物的复合材料进行间接修复可作为陶瓷贴面和直接复合树脂修复治疗后牙的替代方法。本研究的目的是评估一种瓷甲冠的机械性能和摩擦学性能。
材料与方法
制作60个样本并分为两组：一组为未进行热循环的对照组（n = 20），一组为进行5000次热循环的试验组（n = 40）。研究参数包括显微硬度、表面粗糙度和摩擦系数（划痕试验）。
结果
与复合树脂相比，瓷甲冠表现出聚合收缩减小、磨损更高和抗断裂性能。即使经过热循环，所研究的瓷甲冠仍具有良好的机械性能。粗糙度是受影响最大的性能，增加了25.8%，显微硬度下降了10.5%，摩擦系数增加了4.2%。
结论
在某些情况下，瓷甲冠可作为复合树脂和陶瓷的替代物，提供美观、保守且持久的选择。
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