Biomechanical Characterization of Unilateral and Bilateral Posterior Lumbar Interbody Fusion Constructs
Table 3
LB-loading descriptive statistics.
Stage
Flexibility parameters
Raw
Normalized
Mean
Std. deviation
95% LCL
95% UCL
Mean
Std. deviation
95% LCL
95% UCL
Intact
ROM
8.13
0.68
6.64
9.63
1.00
—
—
—
NZ
1.35
0.18
0.96
1.75
1.00
—
—
—
Facetectomy
ROM
8.55
0.71
7.00
10.10
1.05
0.02
1.00
1.11
NZ
1.62
0.21
1.15
2.09
1.24
0.14
0.94
1.54
Unilateral
ROM
5.23
0.48
4.17
6.28
0.65
0.05
0.54
0.77
NZ
1.42
0.18
1.03
1.81
1.12
0.15
0.79
1.45
Bilateral
ROM
1.74
0.35
0.98
2.50
0.24
0.06
0.11
0.37
NZ
0.43
0.15
0.09
0.76
0.41
0.17
0.02
0.79
Unilateral+cage
ROM
4.83
0.56
3.59
6.07
0.59
0.05
0.48
0.70
NZ
1.34
0.23
0.83
1.84
0.98
0.11
0.74
1.23
Bilateral+cage
ROM
1.78
0.38
0.94
2.62
0.24
0.06
0.1
0.38
NZ
0.41
0.11
0.16
0.66
0.36
0.12
0.09
0.63
LB: results of lateral bending testing. Raw values indicate motion measured in degrees while normalized values represent the amount of motion as a percentage of intact values.
