Table 3.
Biomechanical and radiological results for the 12 patients. The peak pressure and contact area of the acetabulum are listed. Additional parameters include the centroid of pressure (CP) and the force-displacement separation angle (RU)
Patient no. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Pressure (MPa) | ||||||||||||
preoperatively | 2.9 | 2.8 | 4.1 | 2.6 | 2.1 | 5.0 | 5.1 | 7.7 | 2.0 | 2.3 | 2.0 | 4.5 |
postoperatively | 2.1 | 1.6 | 3.1 | 1.5 | 1.8 | 2.1 | 2.1 | 3.2 | 2.1 | 1.9 | 1.5 | 1.5 |
optimum | 1.9 | 1.6 | 3.1 | 1.4 | 1.3 | 2.0 | 2.0 | 1.6 | 1.8 | 1.7 | 1.3 | 1.4 |
Area (mm2) | ||||||||||||
preoperatively | 1562 | 1678 | 1482 | 1937 | 2153 | 1175 | 1234 | 535 | 1920 | 1836 | 1984 | 1207 |
postoperatively | 1824 | 2367 | 1677 | 2826 | 2861 | 2260 | 2395 | 1496 | 2370 | 2647 | 2631 | 2689 |
optimum | 2144 | 2390 | 1821 | 2739 | 2904 | 2242 | 2395 | 1744 | 2255 | 2351 | 2741 | 2845 |
CP ratio | ||||||||||||
preoperatively | 0.12 | 0.03 | 0.02 | 0.02 | 0.03 | 0.05 | 0.01 | 0.12 | 0.26 | 0.02 | 0.03 | 0.09 |
postoperatively | 0.65 | 0.74 | 0.55 | 0.56 | 1.02 | 0.79 | 0.68 | 1.12 | 1.12 | 0.84 | 0.92 | 0.58 |
optimum | 0.63 | 0.69 | 0.70 | 0.60 | 0.64 | 0.82 | 0.83 | 0.70 | 0.71 | 0.70 | 0.68 | 0.71 |
RU angle (°) | ||||||||||||
preoperatively | 36 | 45 | 33 | 45 | 37 | 59 | 60 | 72 | 20 | 35 | 39 | 61 |
postoperatively | 13 | 5 | 4 | 7 | 34 | 7 | 5 | 50 | 24 | 13 | 24 | 13 |
optimum | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 |