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Table 2 Extrusion forces and tilting moments of the examined press-fit cups in macerated bone with high and low bone density

From: Does osteoporosis reduce the primary tilting stability of cementless acetabular cups?

   High bone density Low bone density
  Measurement Max. extrusion force in N Max. tilting moment in Nm Max. extrusion force in N Max. tilting moment in Nm
Metallsockel CL 1 3352,9 83,8 1236,9 30,9
  2 4351,9 108,8 849,2 21,2
  3 2012,1 50,3 1601,9 40,0
  4 5419,3 135,5 4599,0 115,0
  5 3986,9 99,7 2944,2 73,6
  Mean 3824,6 (1260,5) 95,6 2246,2 (1533,6) 56,2
95% confidence interval 1104,9   1344,2  
Monoblock 1 921,8 23,0 1584,4 39,6
  2 451,3 11,3 1283,7 32,1
  3 1241,7 31,0 702,6 17,6
  4 1683,8 42,1 measurement error
  5 2220,6 55,5 1697,3 42,4
  Mean 1303,8 (682,2) 32,6 1317,0 (445,2) 32,9
95% confidence interval 598,0   390,2