Table 8.
Segmental sagittal translatory motion of the lower lumbar spine as measured from flexion-extension radiographs at the last follow-up in comparison to normal values (expressed in percent of segments)
| L3–L4 | L4–L5 | L5–S1 | |||||||
|---|---|---|---|---|---|---|---|---|---|
| mm | Direct repair (n=22)b | Fusion (n=23)c | Normala (n=56) | Direct repair (n=22)b | Fusion (n=23)c | Normala (n=56) | Direct repair (n=22)b | Fusion (n=23)c | Normala (n=56) |
| <3 | 92 | 96 | 62 | 96 | 83 | 54 | 96 | 100 | 76 |
| 3 | 4 | - | 9 | – | 9 | 9 | 4 | – | 2 |
| 4 | – | - | 14 | 4 | – | 9 | – | – | 14 |
| 5 | –4 | 4 | 13 | – | 4 | 25 | – | – | 4 |
| 6 | – | – | 2 | – | 4 | 3 | – | – | 2 |
| 7 | – | – | – | – | – | - | – | – | 2 |
aNormal values for symptom-free adults according to Tallroth et al. [50]
bOnly L5 cases
cIn four cases with L4–S1 fusion L2–L3, L3–L4, and L4–L5 were measured