Surface composition, adhesion strength and biocompatibility activity of CoCrMo-Hydroxyapatite composite

Nurul Akmal, Che Lah and Mas Ayu, Hassan and Rosdi, Daud (2025) Surface composition, adhesion strength and biocompatibility activity of CoCrMo-Hydroxyapatite composite. Composite Structures, 370 (119391). pp. 1-19. ISSN 0263-8223. (Published)

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Abstract

Hydroxyapatite (HA) has been considered one of the most efficient surface modification implant components for enhancing osteointegration. However, post-traumatic inflammation or swelling stands out as one of the substantial obstacles in reconstructive surgery involving Cobalt-Chrome-Molybdenum (CoCrMo) orthopaedic implants. Continuous efforts have been made to increase the success towards improving the surface-modified CoCrMo-HA interface and its impact on ion release, the primary mechanisms of degradation. Herein, the present study endeavours to report a detailed surface composition analysis of fabricated CoCrMo-HA alloys, highlighting the changes in surface bioactivity and metal ion release, as influenced by the sintering temperatures. Notably, CoCrMo-HA850 alloy sintered at 750 °C disclosed the most compromised system for better surface modification, improved biocompatibility and metal ion release activity properties. Parallelly, a comparative analysis of scaffolds composed of the scaffold poly lactic acid (PLA) reinforced with HA, forming CoCrMo-PLA/HA composites and another sample incorporating foreign ion magnesium, Mg with HA forming CoCrMo-Mg/HA composite. The incorporation of PLA and Mg into CoCrMo-HA structures yields distinct nucleation, cracking and propagation features due to varying system stabilities. The discoveries reported in this work are crucial for advancing understanding and to re-think improved CoCrMo-HA systems for future applications in bone regeneration implants and scaffolds.

Item Type:	Article
Additional Information:	Indexed by Scopus
Uncontrolled Keywords:	Bioactivity; Chromium alloys; Cobalt alloys; Hydroxyapatite; Magnesium; Magnesium alloys; Metal analysis; Metal ions; Molybdenum alloys; Scaffolds; Sintering; Surface treatment; Ternary alloys
Subjects:	Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General) T Technology > TJ Mechanical engineering and machinery
Faculty/Division:	Faculty of Manufacturing and Mechatronic Engineering Technology Faculty of Mechanical and Automotive Engineering Technology Centre for Advanced Intelligent Materials
Depositing User:	Mrs. Nurul Hamira Abd Razak
Date Deposited:	10 Jul 2025 03:33
Last Modified:	10 Jul 2025 03:33
URI:	http://umpir.ump.edu.my/id/eprint/45052
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