Tavakoli Javad, Khosroshahi Mohammad E
1Biomechanics and Implants Research Group, The Medical Device Research Institute, College of Science and Engineering, Flinders University, GPO Box 2100, Adelaide, SA 5001 Australia.
2Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8 Canada.
Biomed Eng Lett. 2018 Apr 4;8(3):249-257. doi: 10.1007/s13534-018-0063-6. eCollection 2018 Aug.
The surface properties of implant are responsible to provide mechanical stability by creating an intimate bond between the bone and implant; hence, play a major role on osseointegration process. The current study was aimed to measure surface characteristics of titanium modified by a pulsed Nd:YAG laser. The results of this study revealed an optimum density of laser energy (140 Jcm), at which improvement of osteointegration process was seen. Significant differences were found between arithmetical mean height (Ra), root mean square deviation (Rq) and texture orientation, all were lower for 140 Jcm samples compared to untreated one. Also it was identified that the surface segments were more uniformly distributed with a more Gaussian distribution for treated samples at 140 Jcm. The distribution of texture orientation at high laser density (250 and 300 Jcm) were approximately similar to untreated sample. The skewness index that indicates how peaks and valleys are distributed throughout the surface showed a positive value for laser treated samples, compared to untreated one. The surface characterization revealed that Kurtosis index, which tells us how high or flat the surface profile is, for treated sample at 140 Jcm was marginally close to 3 indicating flat peaks and valleys in the surface profile.
植入物的表面特性通过在骨与植入物之间形成紧密结合来提供机械稳定性，因此在骨整合过程中起主要作用。当前的研究旨在测量经脉冲Nd:YAG激光改性的钛的表面特性。该研究结果显示了激光能量的最佳密度（140 J/cm²），在此密度下可观察到骨整合过程得到改善。在算术平均高度（Ra）、均方根偏差（Rq）和纹理方向方面发现了显著差异，与未处理的样品相比，140 J/cm²的样品在这些方面的值均较低。此外，还确定在140 J/cm²下处理的样品表面段分布更均匀，且具有更接近高斯分布的特征。在高激光密度（250和300 J/cm²）下的纹理方向分布与未处理的样品大致相似。与未处理的样品相比，表明表面峰谷分布情况的偏度指数在激光处理的样品中显示为正值。表面表征显示，对于140 J/cm²下处理的样品，反映表面轮廓高低或平坦程度的峰度指数略接近3，表明表面轮廓中的峰谷较为平坦。
