2种不同方法制作的钴铬合金的表面性能体外研究

In vitro study on the surface properties of cobalt chromium alloy fabricated by two different methods

目的:评价选择性激光烧结钴铬合金与传统铸造钴铬合金的表面自由能及表面变形链球菌的黏附情况。方法:铸造方法制备SG钴铬合金试件(SG组)和Wirobond 280钴铬合金(W280组),激光烧结方法制备钴铬合金试件(SLS组)(n=8),试件打磨后测表面形态、表面接触角以及表面变形链球菌黏附情况。结果:相同粗糙度下SLS组、W280组、SG组表面接触角Theta值分别为66.200±3.112、74.212±3.206和67.238±2.047(P>0.05);表面链球菌黏附菌落数分别为8.88±2.90、9.25±2.05、8.50±1.85(P>0.05)。结论:激光烧结法与铸造法制得的钴铬合金的表面性能相似。

Objective： To evaluate the surface free energy and Streptococcus mutans （S. mutans） adhesion on the surfaces of Co-Cr al- loy specimens fabricated by selective laser sintering（SLS） and casting method（ SG and W280） respectively. Methods： The specimens of three groups were polished by SiC sandpaper. Surface morphology test, surface contact angle test and surface adhesion test of S. mu- tarts were performed. Results： With the same surface roughness value, the surface contact angle of group SLS, W280 and SG was 66. 200±3.112, 74. 212 ±3. 206 and 67. 238± 2. 047 （P 〉 0.05 ）, the surface adhesion of S. mutans colone was 8.88 ± 2.90, 9.25 ± 2.05 and 8.50 ±1.85 （ P 〉 0.05 ） , respectively. Conclusion： The cobalt chromium alloy fabricated by SLS and casting method have similar surface performance.