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 | |||