Morphology and Dissolution Rate of Wear Debris from Silicon Nitride Coatings

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• 作者：Maria Pettersson ; Charlotte Skjöldebrand ; Luimar Filho ; Håkan Engqvist ; Cecilia Persson
• 刊名：ACS Biomaterials Science & Engineering
• 出版年：2016
• 出版时间：June 13, 2016
• 年：2016
• 卷：2
• 期：6
• 页码：998-1004
• 全文大小：474K
• ISSN：2373-9878

文摘

Silicon nitride (SiN_x) coatings have recently been introduced as a potential material for joint implant bearing surfaces, but there is no data on wear debris morphology nor their dissolution rate, something that could play a central role to implant longevity. In this study, wear debris was generated in a ball-on-disc setup in simulated body fluid. After serum digestion the debris was analyzed with scanning electron microscopy and energy-dispersive X-ray spectroscopy. The particle dissolution rate was evaluated using inductively coupled plasma techniques, on model SiN_x particles. The wear debris from SiN_x coatings was found to be round, in the nm range and formed agglomerates in the submicrometer to micrometer range. Model particles dissolved in simulated body fluid at a rate of: c(t) = 39.45[1 – exp(−1.11 × 10^–6t)], where [c(t)] = mg/L and [t] = s. This study can be used as a preliminary prediction of size, shape, and dissolution rate of wear debris from SiN_x coatings.