Wear, strength, modulus and hardness of CAD/CAM restorative materials
Wear, strength, modulus and hardness of CAD/CAM restorative materials
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DOI：
10.1016/j.dental.2016.08.222
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发表时间：
2016-11-01
期刊：
影响因子：
5
通讯作者：
Burgess, John O.
中科院分区：
文献类型：
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作者：
Lawson, Nathaniel C.;Bansal, Ritika;Burgess, John O.
Objective.为了测量几种CAD/CAM材料的机械性能，包括二硅酸锂（例如，max CAD）、硅酸锂/氧化锆（Celtra Duo）、3种树脂复合材料（CerasmartTM、Lava Ultimate、Paradigm MZ 100）和聚合物渗透陶瓷（Enamic）。将CAD/CAM块切成2.5 mm x 2.5 mm x 16 mm的棒，用于弯曲强度和弹性模量测试，并将4 mm厚的块切成4 mm厚的块，用于硬度和磨损测试。E.max CAD和一半Celtra Duo样本在炉中处理。在三点弯曲夹具中测试弯曲强度样本（n = 10）。维氏显微硬度（n = 2，每个试样5个读数）用1 kg载荷和15 s停留时间测量。将CAD/CAM材料以及人切牙的唇表面安装在UAB磨损装置中。人类前磨牙的尖部作为拮抗剂安装。在20 N力、2 mm滑动距离、1 Hz频率、24 ℃和33%甘油润滑下，对样本进行400，000次循环测试。用非接触式轮廓术测量了牙体磨损和相对牙釉质磨损。采用单因素方差分析和Tukey事后分析（α = 0.05）分析数据。对标本进行扫描电镜观察。每种材料的性能不同（p
Objective. To measure the mechanical properties of several CAD/CAM materials, including lithium disilicate (e.max CAD), lithium silicate/zirconia (Celtra Duo), 3 resin composites (Cerasmart, Lava Ultimate, Paradigm MZ100), and a polymer infiltrated ceramic (Enamic).Methods. CAD/CAM blocks were sectioned into 2.5 mm x 2.5 mm x 16 mm bars for flexural strength and elastic modulus testing and 4 mm thick blocks for hardness and wear testing. E.max CAD and half the Celtra Duo specimens were treated in a furnace. Flexural strength specimens (n = 10) were tested in a three-point bending fixture. Vickers microhardness (n = 2, 5 readings per specimen) was measured with a 1 kg load and 15 s dwell time. The CAD/CAM materials as well as labial surfaces of human incisors were mounted in the UAB wear device. Cusps of human premolars were mounted as antagonists. Specimens were tested for 400,000 cycles at 20 N force, 2 mm sliding distance, 1 Hz frequency, 24 degrees C, and 33% glycerin lubrication. Volumetric wear and opposing enamel wear were measured with non contact profilometry. Data were analyzed with 1-way ANOVA and Tukey post-hoc analysis (alpha = 0.05). Specimens were observed with SEM.Results. Properties were different for each material (p