Skip to main content

Table 1 Summary of the parameters obtained from experimental tests and numerical simulations.

From: The effect of geometry and abduction angle on the stresses in cemented UHMWPE acetabular cups – finite element simulations and experimental tests

   Experimental tests Finite element analyses
   IP Lubinus eccentric IP1 Lubinus eccentric IP2 Lubinus concentric
Compression (μm) 45° Mean: 115 (n = 1) Mean: 129 (n = 2) 98 132 - -
    Range: 125–132     
  60° Mean: 123 (n = 1) Mean: 140 (n = 2) 107 133 - -
    Range: 129–150     
Penetration rate (μm/million cycles) 45° Mean: 11.8 (n = 2) Mean: 9.5 (n = 4) - - - -
   Range: 11.6–11.9 Range: 8.9–10.2     
  60° Mean: 14.7 (n = 2) Mean: 11.2 (n = 4) - - - -
   Range: 14.2–15.2 Range: 10.0–11.9     
Von Mises stress 45° - - Fig. 3 Fig. 3 Fig. 3 Fig. 3
  60° - - " " " "
Contact pressure and/or area 45° Fig. 6 Fig. 6 Figs. 4-8 Figs. 4-8 Figs. 4-8 Figs. 4-8
  60° - - " " " "
  1. 45° and 60° refer to the abduction angle.
  2. Experimental maximum compressions were analyzed from the initial loading cycles for two cup-cement combinations (12 acetabular cups, 6 experimental tests) at the same time (Fig. 1).
  3. Penetration rates of the cups, i.e. plastic deformations, were calculated after 5 million loading cycles.