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Table 2 Non-cemented titanium acetabular cup component migration – mean and standard deviation values at 6, 12 weeks, 6, 12, 24, 60 and 120 months follow-up using model-based EGS are presented. According to axis-symmetric implant design of the cup component, Ry migration values are not given

From: Model-based roentgen stereophotogrammetric analysis using elementary geometrical shape models: 10 years results of an uncemented acetabular cup component

Follow-up Translation [mm] Rotation [deg] Cases [n]
x y z Rx Ry Rz  
Reference
 mean 0.00 0.00 0.00 0.00 0.00 39
 SD 0.00 0.00 0.00 0.00 0.00  
6 weeks
 mean 0.20 0.11 −0.04 −0.17 −0.10 32
 SD 0.41 0.22 0.33 0.96 0.72  
12 weeks
 mean 0.16 0.14 −0.06 −0.12 −0.08 33
 SD 0.44 0.23 0.39 0.86 0.80  
6 months
 mean 0.22 * 0.16 0.03 −0.27 0.05 37
 SD 0.45 0.25 0.42 0.95 0.76  
12 months
 mean 0.23 * 0.16 0.07 −0.30 −0.19 39
 SD 0.44 0.22 0.38 0.91 0.67  
24 months
 mean 0.28 * 0.17 0.02 * -0.61 0.00 36
 SD 0.46 0.24 0.50 0.57 1.03  
60 months
 mean 0.29 0.19 −0.02 −0.21 − 0.07 15
 SD 0.52 0.27 0.43 1.24 0.47  
120 months
 mean 0.19 * 0.36 −0.04 − 0.53 0.22 18
 SD 0.69 0.27 0.35 0.67 1.21  
  1. SD standard deviation
  2. *mean value significant different (p < 0.05) to reference results