Department of Metallurgical and Materials Engineering, Yildiz Technical University, Istanbul, Turkey.
Lasers Med Sci. 2019 Oct;34(8):1567-1573. doi: 10.1007/s10103-019-02746-z. Epub 2019 Feb 23.
The effects of lasing parameters on the precipitation of hydroxyapatite (HA) on the commercial Ti6Al4V alloy in simulated body fluid (SBF) were investigated. Ti6Al4V plates were polished and ultrasonically cleaned in acetone and ethyl alcohol, respectively. The specimen surfaces were treated with Er:YAG laser using super short pulse (SSP, 50 μs) and very short pulse (VSP, 100 μs) modes. Surface roughness was measured before and after laser treatment. The specimens were immersed in simulated body fluid (SBF) for 1, 3, and 7 days and, then the amount of Ca and P precipitation on specimens was determined using SEM/EDS analysis. An average roughness varying between 0.19 and 0.81 μm in surface roughness was detected in all laser-treated specimens depending on the lasing parameters. The highest surface roughness and Ca precipitation were found in VSP group (20 Hz and 5 W). Laser treatment of specimen surfaces has dramatically increased the HA precipitation due to the increasing surface roughness. It is also concluded that the immersion time was effective on the HA precipitation as well.
研究了激光参数对模拟体液（SBF）中商用 Ti6Al4V 合金上羟基磷灰石（HA）沉淀的影响。Ti6Al4V 板分别经过抛光和丙酮、乙醇超声清洗。使用超短脉冲（SSP，50 μs）和短脉冲（VSP，100 μs）模式对试样表面进行 Er:YAG 激光处理。激光处理前后测量表面粗糙度。将试样浸入模拟体液（SBF）中 1、3 和 7 天，然后使用 SEM/EDS 分析确定试样上 Ca 和 P 的沉淀量。根据激光参数，所有激光处理的试样的表面粗糙度均在 0.19 到 0.81 μm 之间。在 VSP 组（20 Hz 和 5 W）中发现了最高的表面粗糙度和 Ca 沉淀。由于表面粗糙度的增加，试样表面的激光处理极大地促进了 HA 的沉淀。还得出结论，浸泡时间对 HA 的沉淀也有效。
