Yoo Soo-Yoen, Kim Seong-Kyun, Heo Seong-Joo, Koak Jai-Young, Kim Joung-Gyu
Department of Prosthodontics and Dental Research Institute, Seoul National University Dental Hospital, School of Dentistry, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul 03080, Korea.
Sense Dental Laboratory, 1104, Seoul Soop IT-Valley, 77, Seongsuil-ro, Seongdong-gu, Seoul 04790, Korea.
Materials (Basel). 2020 Sep 28;13(19):4322. doi: 10.3390/ma13194322.
Bonding agents have been developed to improve bond strength between ceramic and Co-Cr metal. The aim of this study was to investigate the influence of two bonding agents on bond strength of Co-Cr metal fabricated by selective laser melting (SLM). Bond strength was determined by a three-point bending test, and the interfaces of the metal and ceramic, before and after the bending test, were observed by optical microscopy and scanning electron microscopy (SEM) to determine the thickness of the oxide layer and amount of ceramic remaining. To analyze the elemental composition of the bonding agents and fractured surfaces, energy dispersive X-ray spectroscopy (EDS) was used. Co-Cr specimens with bonding agent showed significantly higher bond strength than Co-Cr specimens without bonding agents. The fractured surfaces of most specimens showed mixed failure, but failure mode varied according to bonding agent and fabrication type. Specimens from groups treated with bonding agents had significantly higher remaining ceramic fractions on fractured Co-Cr alloys than specimens from groups that did not receive bonding agent. Mass amounts of silicone (Si) and titanium (Ti) on the fractured alloy surfaces were also different among specimens according to method of fabrication and presence of bonding agent. Together, the results suggest that application of bonding agent to 3D printed Co-Cr metal increases bond strength with ceramics.
已经开发出粘结剂来提高陶瓷与钴铬金属之间的粘结强度。本研究的目的是研究两种粘结剂对选择性激光熔化（SLM）制造的钴铬金属粘结强度的影响。通过三点弯曲试验测定粘结强度，并通过光学显微镜和扫描电子显微镜（SEM）观察弯曲试验前后金属与陶瓷的界面，以确定氧化层的厚度和剩余陶瓷的量。为了分析粘结剂和断裂表面的元素组成，使用了能量色散X射线光谱（EDS）。使用粘结剂的钴铬试样显示出比未使用粘结剂的钴铬试样显著更高的粘结强度。大多数试样的断裂表面显示出混合破坏，但破坏模式因粘结剂和制造类型而异。与未使用粘结剂的组相比，使用粘结剂处理的组的断裂钴铬合金上剩余的陶瓷部分显著更高。根据制造方法和粘结剂的存在情况，断裂合金表面上硅（Si）和钛（Ti）的质量含量在试样之间也有所不同。总之，结果表明将粘结剂应用于3D打印的钴铬金属会增加与陶瓷的粘结强度。
