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. 2009 Apr 1;80(2):155–161. doi: 10.3109/17453670902947390

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