|
Comparison of rod strain (Mean ± S.D. μE) for all constructs |
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| Testing |
Contour |
Monoaxial screws |
Polyaxial screws |
|
|
|||
| Compression |
0° |
893 ± 123 † |
172 ± 33† |
| 7° |
248 ± 23 * |
154 ± 20* |
|
| 14° |
268 ± 52 # |
168 ± 25# |
|
| 21° |
873 ± 170 ‡ |
161 ± 23‡ |
|
|
|
|||
| Flexion |
0° |
595 ± 34 † |
256 ± 20† |
| 7° |
22.1 ± 4.8 * |
266 ± 12 * |
|
| 14° |
46.0 ± 4.4 # |
203 ± 27# |
|
| 21° |
633 ± 45 ‡ |
162 ± 15 ‡ |
|
|
|
|||
| Lateral Bending |
0° |
540 ± 33† |
404 ± 4† |
| 7° |
258 ± 22* |
381 ± 10 * |
|
| 14° |
273 ± 6 # |
430 ± 28 # |
|
| 21° |
521 ± 16 ‡ |
407 ± 6‡ |
|
|
† Significant difference between monoaxial screws group and polyaxial screws group (p < 0.05). * Significant difference between monoaxial screws group and polyaxial screws group (p < 0.05). # Significant difference between monoaxial screws group and polyaxial screws group (p < 0.05). ‡ Significant difference between monoaxial screws group and polyaxial screws group (p < 0.05). | |||
Chen et al. BMC Musculoskeletal Disorders 2007 8:28 doi:10.1186/1471-2474-8-28 |
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