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Table 1 Extrusion forces and tilting moments of the examined threaded 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
Zintra 1 5829,6 145,7 5931,2 148,28
  2 8540,5 213,5 8527,7 213,1925
  3 5222,1 130,6 2383,3 59,5825
  4 4237,9 105,9 2427,1 60,6775
  5 4522,6 113,1 9472,1 236,8025
  Mean 5670,5 (1720,0) 141,8 5748,3 (3315,8) 143,7
95% confidence interval +/- 1507,6   +/- 2906,4  
Hofer 1 11045,8 276,1 3822,3 95,5575
  2 10778,2 269,5 10915,7 272,8925
  3 3928,0 98,2 6534,2 163,355
  4 10805,5 270,1 4290,2 107,255
  5 1850,2 46,3 8582,0 214,55
  Mean 7681,5 (4437,3) 192,0 6828,9 (2972,7) 170,722
95% confidence interval +/- 3889,4   +/- 2605,6