A New CT Method for Assessing 3D Movements in Lumbar Facet Joints and Vertebrae in Patients before and after TDR

Table 1

Individual patient’s movement and facet joint magnitude at L5-S1 level before and after surgery.

	Rotation (degrees)						3D facet translation (mm)
Patient	Sagittal		Coronal^†		Transverse		Right		Left
	Before	After	Before	After	Before	After	Before	After	Before	After
1	9.3	9.6	0.4	0.7	0.0	0.9	4.8	3.5	5.7	6.7
2	9.5	8.6	0.5	0.5	0.1	1.0	5.0	7.6	5.0	3.7
3	3.7	3.8	0.1	0.2	0.4	0.0	2.5	2.6	1.7	1.7
4	5.5	5.3	0.5	3.2	0.9	0.5	3.7	3.0	1.4	0.3
5	8.2	5.9	0.1	0.8	0.1	0.2	3.8	3.5	4.1	3.4
6	4.3	7.4	0.5	1.9	0.5	0.6	1.7	4.0	5.8	3.1
7	2.9	6.6	0.2	0.8	0.1	0.6	2.7	4.0	0.6	4.4
8	6.1	6.9	0.2	2.7	0.6	0.3	3.1	2.6	1.9	4.1
9	4.3	5.0	0.5	0.2	0.8	0.4	2.7	3.7	4.7	4.6
10	5.3	7.4	0.4	0.4	0.8	0.0	2.8	3.6	2.3	2.5
Median (±SD)	5.4 (±2.3)	6.8 (±1.7)	0.4 (±0.2)	0.8 (±1.1)	0.5 (±0.3)	0.5 (±0.3)	3.0 (±1.0)	3.5 (±1.4)	3.2 (±1.9)	3.7 (±1.7)
Minimum	2.9	3.8	0.1	0.2	0.0	0.0	1.7	2.6	0.6	0.3
Maximum	9.5	9.6	0.5	3.2	0.9	1.0	5.0	7.6	5.8	6.7

Significantly different before and after operation ().