Table II.

Material properties and mesh size.

Material	Density, (ρ gcm-3)	Elastic Modulus, E (MPa)	Poisson’s ratio	No. elements
Cancellous	ρ = 0.04 + 0.00092 HU	${\displaystyle E=\{\begin{array}{l}311,\rho <0.1\\ 26,480{\rho }^{1.93},0.1\le \rho \le 0.37\\ 6,878.8\rho +1351.9,0.37<\rho \le 1.5\\ 5,230{\rho }^{2.39}+1000,\rho >1.5\end{array}}$	0.3	685,667
Cortical	N/A	18,000	0.33	46,841
Cortex		18,000	0.33	4,595
CoCr implant		210,000	0.33	39,589
PE bearing		600	0.3	32,258
PMMA cement		1800	0.33	48,496

CoCr, cobalt-chromium; HU, Hounsfield unit; N/A, not applicable; PE, polyethylene; PMMA, polymethyl methacrylate.