Table 5.

Peak max and min principal stresses and strains on the cortical and spongy bones, in the low-density model

		Cortical bone				Spongy bone
		Principal stress (MPa)		Principal strain (µε)		Principal stress (MPa)		Principal strain (µε)
		Max	Min	Max	Min	Max	Min	Max	Min
Uni-lateral	Ti	40.14	−73.26	2315	−4289	1.849	−2.194	6499	−6709
	PEEK	13.76	−55.83	1544	−3386	1.320	−1.100	3375	−3968
Bi-lateral	Ti	37.36	−71.11	2163	−3871	1.84	−2.143	6599	−6749
	PEEK	14.77	−48.75	1390	−2935	1.36	−1.070	3373	−3750
Anterior	Ti	39.06	−66.05	2029	−3923	1.378	−2.045	5126	−6619
	PEEK	10.70	−51.55	1228	−3056	1.10	−1.030	3521	−4020