Table 1 The intervertebral displacements on L4–L5 segment for intact and two different extents of decompressive procedure. (Intact, bilateral laminotomy, and laminectomy). (Unit: mm)
Intact | Bilateral laminotomy | Laminectomy | ||||
|---|---|---|---|---|---|---|
Flexion | Extension | Flexion | Extension | Flexion | Extension | |
Specimen 1 | -1.118 | 0.944 | -1.135 | 1.276 | -2.015 | 1.187 |
Specimen 2 | -1.116 | 0.992 | -1.012 | 0.951 | -1.433 | 0.860 |
Specimen 3 | -1.123 | 1.033 | -1.279 | 1.040 | -1.338 | 0.938 |
Specimen 4 | -0.892 | 0.710 | -0.998 | 0.835 | -1.402 | 0.944 |
Specimen 5 | -1.004 | 0.829 | -1.165 | 0.911 | -1.410 | 1.155 |
Specimen 6 | -.0832 | 0.955 | -1.196 | 1.286 | -1.675 | 1.023 |
Specimen 7 | -1.238 | 0.873 | -0.856 | 1.115 | -1.864 | 0.968 |
Specimen 8 | -0.984 | 0.892 | -1.243 | 0.969 | -1.473 | 0.815 |
Ave. | -1.038 | 0.904 | -1.111 | 1.048 | -1.576 | 0.986 |
S.D. | 0.126 | 0.095 | 0.134 | 0.155 | 0.232 | 0.122 |