Biomechanical Evaluation of a Novel Apatite-Wollastonite Ceramic Cage Design for Lumbar Interbody Fusion: A Finite Element Model Study

Table 2

Maximum stress values of the whole construct and their localisations under different loads. The maximum stress values of the whole construct by using K2 and K4 designs were significantly better (). I: intact model.

	Flexion		Extension		Bending		Rotation
	Max. stress value	Max. stress point	Max. stress value	Max. stress point	Max. stress value	Max. stress point	Max. stress value	Max. stress point
I	93.5	Disc; space	101.4	Posterior; elements	85.2	Disc; space	66.0	Disc; space
K1	112.1	Disc; space	61.6	Disc; space	100.8	Disc; space	72.3	Disc; space
K2	48.8	Posterior; elements	33.9	Posterior; elements	46.0	Posterior; elements	63.6	Posterior; elements
K3	114.6	Disc; space	68.4	Disc; space	112.1	Disc; space	80.6	Disc; space
K4	48.7	Posterior; elements	33.6	Posterior; elements	48.6	Disc; space	63.2	Posterior; elements