Journal
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
Volume 114, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jmbbm.2020.104178
Keywords
Femoral head; Acetabular socket liner; Uniaxial pressing; CMM; 3D profile; Micro-CT; Burst strength; Product validation
Funding
- Department of Biotechnology (DBT), Government of India (GOI) [BT/PR13466/COE/34/26/2015]
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The study focused on the design, fabrication, validation, and polishing of commercial grade SrO doped ZTA composition for artificial hip prosthesis, ensuring precision and load bearing capacity. After 3D surface profile, microstructure, and compressive load testing, the ceramic prototypes showed superior performance.
An established commercial grade SrO doped ZTA composition has been considered to design, fabrication through uniaxial pressing followed by sintering and polishing, validation of dimension, 3D surface profile, 3D microstructure, and compressive load bearing capacity of femoral head - acetabular socket liner prototypes for the hip prosthesis. While design and dimensions are concerned, both the steel (HRC60) molds were designed and machined to achieve precious dimensions of femoral head (FH; OD - 30 +/- 0.01 mm) and acetabular socket liner (ASL; ID - 30.15 +/- 0.01 mm). A close variation in the range of +/- 0.01 mm was confirmed the precision geometry of polished FH and ASL with consideration of 22 points coordinate measuring method (CMM). 3D surface profile ensures the surface characteristics of R-a = 0.2 +/- 0.01 mu m and R-q = 0.5 +/- 0.01 mu m for outer surface of FH and an inner surface of ASL, respectively. Structure integrity and fabrication defects including cracks and pores free bulk structures were confirmed by Micro CT. The compressive load resistance known as burst strength for independent FH and FH-ASL assembly were measured 16.2 KN and 17.6 KN, respectively. The developed ceramic prototypes have an economic advantage and can be adopted as artificial hip prosthesis after extensive in-vitro and in-vivo analysis.
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