Table 4.
Cemented total hip arthroplasty with 5 different articulations: mean cup migration in mm and degrees for all study groups across the study period with 95% confidence interval. Point estimates for the different follow-up timepoints created with the linear mixed model. Values in brachets are cases available at each time point
| Follow-up, months | Steel/CPE a | CoCr/CPE b | OxZr/CPE b | CoCr/XLPE b | OxZr/XLPE b |
|---|---|---|---|---|---|
| X-translation | |||||
| 3 | 0.00 (–0.08 to 0.08) [23] | 0.04 (–0.04 to 0.12) [20] | 0.05 (–0.05 to 0.14) [15] | 0.00 (–0.07 to 0.08) [26] | 0.02 (–0.06 to 0.10) [21] |
| 6 | –0.01 (–0.09 to 0.06) [25] | 0.02 (–0.06 to 0.10) [22] | 0.03 (–0.07 to 0.13) [14] | –0.03 (–0.11 to 0.05) [24] | 0.03 (–0.05 to 0.12) [20] |
| 12 | 0.01 (–0.07 to 0.09) [27] | 0.07 (–0.02 to 0.16) [21] | 0.07 (–0.03 to 0.17) [16] | 0.03 (–0.05 to 0.11) [27] | 0.03 (–0.06 to 0.11) [24] |
| 24 | –0.05 (–0.14 to 0.04) [27] | 0.09 (–0.00 to 0.19) [24] | 0.08 (–0.02 to 0.18) [21] | 0.01 (–0.08 to 0.10) [29] | 0.03 (–0.06 to 0.13) [24] |
| 60 | –0.02 (–0.12 to 0.09) [25] | 0.17 (0.06 to 0.28) [24] | 0.00 (–0.12 to 0.13) [19] | –0.11 (–0.22 to 0.00) [22] | –0.04 (–0.17 to 0.08) [17] |
| 120 | 0.01 (–0.14 to 0.15) [15] | 0.09 (–0.06 to 0.25) [12] | –0.30 (–0.47 to –0.13) [10] | –0.02 (–0.15 to 0.12) [18] | 0.08 (–0.08 to 0.24) [12] |
| Y-translation | |||||
| 3 | 0.09 (0.01 to 0.17) | 0.05 (–0.04 to 0.13) | 0.02 (–0.08 to 0.12) | 0.01 (–0.06 to 0.09) | 0.03 (–0.05 to 0.11) |
| 6 | 0.14 (0.07 to 0.22) | 0.07 (–0.01 to 0.16) | 0.03 (–0.07 to 0.13) | 0.06 (–0.02 to 0.14) | 0.04 (–0.05 to 0.13) |
| 12 | 0.18 (0.09 to 0.26) | 0.06 (–0.04 to 0.16) | 0.02 (–0.09 to 0.13) | 0.01 (–0.07 to 0.10) | 0.06 (–0.04 to 0.15) |
| 24 | 0.19 (0.08 to 0.30) | 0.05 (–0.06 to 0.17) | 0.07 (–0.05 to 0.19) | 0.06 (–0.04 to 0.17) | 0.04 (–0.07 to 0.16) |
| 60 | 0.20 (0.06 to 0.33) | 0.07 (–0.07 to 0.21) | 0.27 (0.11 to 0.42) | 0.13 (–0.01 to 0.27) | 0.09 (–0.06 to 0.25) |
| 120 | 0.20 (0.02 to 0.38) | 0.40 (0.20 to 0.59) | 0.67 (0.46 to 0.88) | 0.05 (–0.13 to 0.22) | –0.00 (–0.20 to 0.20) |
| Z-translation | |||||
| 3 | 0.06 (–0.02 to 0.13) | –0.00 (–0.08 to 0.08) | 0.07 (–0.03 to 0.16) | 0.02 (–0.05 to 0.10) | 0.01 (–0.06 to 0.09) |
| 6 | 0.03 (–0.04 to 0.11) | 0.04 (–0.05 to 0.12) | 0.04 (–0.06 to 0.14) | 0.00 (–0.08 to 0.08) | 0.03 (–0.06 to 0.11) |
| 12 | 0.04 (–0.04 to 0.13) | 0.03 (–0.07 to 0.12) | 0.08 (–0.02 to 0.19) | –0.01 (–0.10 to 0.07) | 0.00 (–0.09 to 0.09) |
| 24 | 0.03 (–0.07 to 0.12) | 0.05 (–0.05 to 0.15) | 0.11 (0.00 to 0.22) | 0.01 (–0.09 to 0.10) | 0.05 (–0.05 to 0.16) |
| 60 | –0.09 (–0.20 to 0.02) | 0.07 (–0.05 to 0.18) | 0.07 (–0.06 to 0.19) | 0.05 (–0.06 to 0.17) | 0.01 (–0.12 to 0.14) |
| 120 | –0.08 (–0.22 to 0.06) | 0.01 (–0.14 to 0.17) | 0.08 (–0.08 to 0.25) | –0.05 (–0.18 to 0.09) | 0.14 (–0.01 to 0.30) |
| X-rotation | |||||
| 3 | –0.13 (–0.28 to 0.02) | 0.01 (–0.15 to 0.18) | –0.04 (–0.22 to 0.15) | –0.12 (–0.27 to 0.02) | –0.06 (–0.21 to 0.10) |
| 6 | –0.08 (–0.24 to 0.07) | –0.09 (–0.26 to 0.08) | –0.09 (–0.28 to 0.11) | –0.01 (–0.17 to 0.15) | –0.11 (–0.28 to 0.06) |
| 12 | –0.22 (–0.39 to –0.04) | –0.07 (–0.26 to 0.12) | –0.20 (–0.41 to 0.01) | –0.12 (–0.30 to 0.05) | 0.04 (–0.14 to 0.23) |
| 24 | –0.14 (–0.34 to 0.06) | –0.08 (–0.29 to 0.14) | –0.33 (–0.55 to –0.10) | –0.07 (–0.27 to 0.13) | 0.01 (–0.21 to 0.22) |
| 60 | –0.16 (–0.40 to 0.08) | –0.09 (–0.34 to 0.15) | –0.37 (–0.63 to –0.10) | –0.31 (–0.56 to –0.07) | 0.03 (–0.24 to 0.30) |
| 120 | –0.03 (–0.33 to 0.28) | –0.30 (–0.62 to 0.03) | –0.09 (–0.44 to 0.26) | 0.09 (–0.20 to 0.38) | –0.23 (–0.56 to 0.10) |
| Y-rotation | |||||
| 3 | 0.12 (–0.10 to 0.35) | 0.12 (–0.11 to 0.35) | –0.01 (–0.28 to 0.26) | –0.04 (–0.24 to 0.17) | 0.04 (–0.18 to 0.26) |
| 6 | 0.11 (–0.09 to 0.32) | 0.10 (–0.12 to 0.32) | 0.12 (–0.15 to 0.39) | 0.14 (–0.07 to 0.35) | 0.03 (–0.19 to 0.26) |
| 12 | 0.09 (–0.13 to 0.30) | 0.20 (–0.03 to 0.44) | 0.15 (–0.12 to 0.42) | 0.16 (–0.06 to 0.37) | 0.14 (–0.09 to 0.37) |
| 24 | 0.03 (–0.21 to 0.27) | 0.10 (–0.16 to 0.35) | 0.27 (–0.01 to 0.54) | 0.15 (–0.09 to 0.38) | 0.06 (–0.20 to 0.32) |
| 60 | 0.11 (–0.18 to 0.40) | 0.14 (–0.16 to 0.43) | 0.19 (–0.13 to 0.52) | 0.08 (–0.22 to 0.37) | 0.08 (–0.25 to 0.41) |
| 120 | 0.14 (–0.25 to 0.52) | 0.16 (–0.26 to 0.58) | 0.89 ( 0.43 to 1.34) | 0.24 (–0.12 to 0.60) | –0.07 (–0.50 to 0.36) |
| Z-rotation | |||||
| 3 | 0.02 (–0.20 to 0.25) | 0.10 (–0.14 to 0.34) | 0.22 (–0.05 to 0.50) | 0.04 (–0.17 to 0.26) | 0.11 (–0.12 to 0.34) |
| 6 | 0.03 (–0.18 to 0.24) | 0.11 (–0.11 to 0.33) | 0.15 (–0.12 to 0.42) | 0.03 (–0.19 to 0.24) | 0.13 (–0.10 to 0.36) |
| 12 | 0.18 (–0.04 to 0.41) | 0.26 (0.01 to 0.51) | 0.21 (–0.07 to 0.48) | 0.11 (–0.11 to 0.33) | 0.05 (–0.18 to 0.29) |
| 24 | 0.08 (–0.18 to 0.34) | 0.26 (–0.02 to 0.54) | 0.28 (–0.01 to 0.58) | 0.18 (–0.08 to 0.45) | 0.10 (–0.18 to 0.38) |
| 60 | 0.29 (–0.04 to 0.62) | 0.42 ( 0.09 to 0.76) | 0.53 (0.16 to 0.90) | 0.18 (–0.16 to 0.52) | 0.01 (–0.36 to 0.39) |
| 120 | 0.35 (–0.09 to 0.79) | 0.36 (–0.12 to 0.83) | 1.99 (1.48 to 2.51) | 0.24 (–0.18 to 0.66) | 0.11 (–0.37 to 0.60) |