Comparative study on properties of hip joint implants with plasma sprayed and sintered porous titanium coating
10.19745/j.1003-8868.2024027
- VernacularTitle:等离子喷涂与多孔烧结钛涂层的髋关节植入物性能对比研究
- Author:
Fan LI
1
;
Bo ZHANG
;
Lu-Wen ZHANG
;
Xue-Chong LIU
;
Na GAO
Author Information
1. 山东省医疗器械和药品包装检验研究院,国家药品监督管理局生物材料器械安全性评价重点实验室,山东省医疗器械生物学评价重点实验室,济南 250101
- Keywords:
plasma spraying;
sintered porous;
titanium coating;
hip joint implant;
coating process
- From:
Chinese Medical Equipment Journal
2024;45(2):41-45
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare the properties of hip joint implants with plasma sprayed and sintered porous coating.Methods The biological fixation femoral stems by plasma spraying and sintered porous titanium coating were observed in terms of the microstructure,tensile properties and abrasion resistance of the coating materials by a fully automatic metallur-gical microscope,a material testing machine and an abrasion meter,and the two coating processes were evaluated by observing the stems'stereological structure and the bonding performance between the coatings and the substrates.Results Plasma spraying titanium coating made the stem having refined and uniform microstructure,a tensile strength of(1 065±21)MPa and an elongation of(15±2)％,which had a loose and porous structure,with an average thickness of 521 μm,an average percentage of pore volume of 37％,and an average pore-intercept of 135 μm,a shear strength with the substrate of(39±4)MPa,a tensile strength of(47±5)MPa and a mass loss after 100 wear cycles of 48 mg;sintered porous titanium coating made the stem having coarse grains in its microstructure,a tensile strength of(879±23)MPa and an elongation of(7±2)％,which had gently sloping surface and uniform distribution of pores,with an average thickness of 1 167 μm,an average percentage of pore volume of 41％,and an average pore-intercept of 240 μm,a shear strength with the substrate of(44±5)MPa,a tensile strength of(62±7)MPa and a mass loss after 100 wear cycles of 15 mg.Conclusion The hip implants with the two coating processes both have their own advantages and disadvantages and meet the requirements of relevant industry standards,which can be expected to obtain excellent in vivo performance.[Chinese Medical Equipment Journal,2024,45(2):41-45]
