Flexural properties and wear behavior of computer-aided design/computer-aided manufacturing resin blocks

被引：6
|
作者：
Oouchi, Hajime [1 ]
Takamizawa, Toshiki [1 ]
Tamura, Tomohiko [1 ]
Ishii, Ryo [1 ]
Tsujimoto, Akimasa [1 ]
Miyazaki, Masashi [1 ]
Kitahara, Nobuya [1 ,2 ]
机构：
[1] Nihon Univ, Sch Dent, Dept Operat Dent, Tokyo, Japan
[2] Team Tokyo, Tokyo, Japan
来源：
DENTAL MATERIALS JOURNAL | 2021年 / 40卷 / 04期
基金：
日本学术振兴会;
关键词：
CAD/CAM resin composite; Flexural properties; Wear behavior; MECHANICAL-PROPERTIES; COMPOSITE BLOCKS; RESISTANCE; PRESSURE; FATIGUE; SYSTEMS;
D O I：
10.4012/dmj.2020-381
中图分类号：
R78 [口腔科学];
学科分类号：
1003 ;
摘要：
This study investigates the flexural properties, Knoop hardness number (KHN), and wear behavior of computer-aided design and computer-aided manufacturing (CAD/CAM) resin blocks and compares these values with those of conventional resin composites for direct restoration (RCDs). Four CAD/CAM resin blocks and two RCDs are compared. Ten specimens per material are used to obtain the flexural properties according to ISO 6872 specifications, and five specimens per material are used for KHN measurement. For sliding impact wear testing, twelve specimens are prepared. Confocal laser scanning microscopy (LSM) is used to determine maximum facet depth and volume loss. Polished material surfaces and worn surfaces after wear testing are observed using scanning electron microscopy and LSM. While measured flexural properties and KHN are found to be material-dependent, CAD/CAM resin blocks exhibit higher wear resistance than RCDs. CAD/CAM resin blocks polymerized at high-pressure and high-temperature are found to exhibit wear behaviors far superior to those of RCDs.
引用
收藏
页码：979 / 985
页数：7
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