Effect of lordosis on adjacent levels after lumbar interbody fusion, before and after removal of the spinal fixator: a finite element analysis

Table 2 Facet joint forces in cephalic adjacent levels

Motion	Model	L2-L3	L3-L4
Motion	Model	(N)	(N)
Extension	INT	65	71
	INT	100%	100%
	FUS-f-5c	82	105
	FUS-f-5c	126%	148%
	FUS-f-0c	84	107
	FUS-f-0c	129%	151%
	FUS-5c	73	90
	FUS-5c	112%	127%
	FUS-0c	75	94
	FUS-0c	115%	132%
Lateral Bending	INT	19	9
	INT	100%	100%
	FUS-f-5c	23	17
	FUS-f-5c	121%	189%
	FUS-f-0c	23	18
	FUS-f-0c	121%	200%
	FUS-5c	21	14
	FUS-5c	111%	156%
	FUS-0c	21	15
	FUS-0c	111%	167%
Torsion	INT	125	124
	INT	100%	100%
	FUS-f-5c	137	165
	FUS-f-5c	110%	133%
	FUS-f-0c	137	168
	FUS-f-0c	110%	135%
	FUS-5c	129	141
	FUS-5c	103%	114%
	FUS-0c	129	141
	FUS-0c	103%	114%

The percentages indicate the facet joint forces of all models normalized by the facet joint forces of INT

ISSN: 1471-2474