Table 2.
Comparison of mean (SD) and peak vertical and horizontal stress (kPa) values in 5 conditions (n = 15)
| 300 N Compression | 500 N Compression | 90 N Distraction | 90 N Distraction, 5 Nm extension | 90 N Distraction, 5 Nm flexion | |
|---|---|---|---|---|---|
| Anterior v | 269.9 (141.0) | 331.3 (185.6) | 3.1 (11.8) | 76.4 (56.5) | 124.6 (46.3) |
| Anterior h | 231.4 (139.8) | 305.0 (188.8) | -0.7 (9.1) | 61.9 (58.0) | 104.6 (44.9) |
| P value* | 0.008 | 0.139 | 0.226 | 0.004 | 0.009 |
| Nucleus v | 341.7 (158.1) | 439.9 (228.6) | 2.9 (10.3) | 92.5 (68.1) | 119.3 (76.6) |
| Nucleus h | 337.9 (160.4) | 447.6 (228.8) | 0.9 (17.23) | 89.7 (74.1) | 120.7 (73.6) |
| P value* | 0.574 | 0.244 | 0.435 | 0.334 | 0.737 |
| Posterior v | 275.5 (144.9) | 369.0 (210.3) | 1.3 (8.9) | 82.1 (62.5) | 87.3 (75.7) |
| Posterior h | 287.6 (125.0) | 391.9 (207.5) | -0.7 (14.7) | 84.7 (59.9) | 91.1 (78.2) |
| P value* | 0.435 | 0.177 | 0.597 | 0.625 | 0.589 |
| Peak | |||||
| Posterior v | 380.7 (161.6) | 505.0 (220.3) | 42.8 (67.9) | 130.9 (59.4) | 123.9 (77.5) |
| Peak | |||||
| Posterior h | 388.4 (158.2) | 505.1 (236.7) | 21.7 (24.1) | 121.1 (72.5) | 146.2 (101.9) |
| Peak | |||||
| Anterior v | 367.5 (138.5) | 476.7 (207.7) | 31.1 (22.9) | 117.2 (66.5) | 198.8 (92.3) |
| Peak | |||||
| Anterior h | 336.9 (153.9) | 441.2 (223.1) | 11.9 (11.1) | 95.3 (70.9) | 159.6 (54.1) |
h = horizontal, v = vertical,
*
Paired t-test between vertical and horizontal values