Osafo Sarah Akua, Asumadu Tabiri, Klenam Desmond, Etinosa Precious, Obayemi John David, Agyei-Tuffour Benjamin, Yaya Abu, Dodoo-Arhin David, Eluu Stanley Chijioke, Soboyejo Wole
Department of Materials Science and Engineering, School of Engineering Sciences, College of Basic and Applied Sciences, University of Ghana, Legon, Accra, Ghana.
Department of Biomaterial Sciences, Dental School, University of Ghana, Korle Bu Campus, Accra, Ghana.
Sci Rep. 2025 May 31;15(1):19113. doi: 10.1038/s41598-025-03253-8.
This paper presents the tribological properties and bioactivity of nanostructured hydroxyapatite (HA) from biowaste sources and coated onto Ti-6Al-4V substrates using a novel pack cementation method. The process introduced HA pillars/nanorods on the surfaces of Ti-6Al-4V to enhance their osseointegration for dental implants. The mechanical and tribological properties were studied with nanoindentation, and pin-on-disk techniques, following the microstructural characterization of the coatings with atomic force microscopy, X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and energy dispersive x-ray spectroscopy. The study also examines the surface bioactivity and elucidates the underlying friction and wear mechanisms of the HA-coated and annealed Ti-6Al-4V surface. The study results show a bone bonding capacity of the biowaste-derived HA-coated substrate with improved hardness and tribological properties. The implications of the study are discussed for the development of nano-structured HA-coated Ti-6Al-4V for dental implants with improved osseointegration for dental and biomedical applications.
本文介绍了源自生物废料的纳米结构羟基磷灰石（HA）的摩擦学性能和生物活性，该羟基磷灰石通过一种新型的包埋渗金属法涂覆在Ti-6Al-4V基体上。该工艺在Ti-6Al-4V表面引入了HA柱/纳米棒，以增强其在牙种植体中的骨整合能力。在通过原子力显微镜、X射线衍射、拉曼光谱、扫描电子显微镜和能量色散X射线光谱对涂层进行微观结构表征之后，使用纳米压痕法和销盘技术研究了其力学和摩擦学性能。该研究还考察了表面生物活性，并阐明了HA涂层和退火处理的Ti-6Al-4V表面潜在的摩擦和磨损机制。研究结果表明，源自生物废料的HA涂层基体具有骨结合能力，且硬度和摩擦学性能得到了改善。讨论了该研究对于开发具有改善的骨整合能力、用于牙科和生物医学应用的纳米结构HA涂层Ti-6Al-4V牙种植体的意义。
