Table 6 Second constriction at the acetabulum centre. In retrograde posterior column screw placement, second constriction of the anatomically preformed bone corridor could be found at the centre of acetabulum in examined Europeans with uninjured pelvis
Constriction at the acetabulum centre | ||||
|---|---|---|---|---|
Distance from entry point | Max. implant diameter | Medio-lateral diameter | Sup.-inf. diameter | |
Men: | ||||
Number | 130 | 130 | 130 | 130 |
Mean ± SD | 77.0 ± 5.6 | 15.2 ± 2.1 | 30.0 ± 3.9 | 20.8 ± 2.8 |
Median | 76.8 | 15.0 | 30.4 | 21.0 |
Range | 66.5–95.3 | 10.0–20.0 | 20.1–39.5 | 13.4–28.2 |
Women: | ||||
Number | 130 | 130 | 130 | 130 |
Mean ± SD | 71.2 ± 3.5 | 13.4 ± 1.9 | 24.8 ± 2.8 | 18.3 ± 2.4 |
Median | 70.8 | 13.5 | 25.0 | 18.1 |
Range | 63.5–79.9 | 8.0–17.0 | 11.2–30.4 | 11.2–23.5 |