Virtual mapping of 260 three-dimensional hemipelvises to analyse gender-specific differences in minimally invasive retrograde lag screw placement in the posterior acetabular column using the anterior pelvic and midsagittal plane as reference

Table 5 First constriction at the inferior margin of acetabulum. In retrograde posterior column screw placement, first constriction of the anatomically preformed bone corridor could be found at the inferior margin of acetabulum in examined Europeans with uninjured pelvis

	Constriction inferior margin of acetabulum
	Distance from entry point	Max. implant diameter	Medio-lateral diameter	Sup.-inf. diameter
Men:
Number	130	130	130	130
Mean ± SD	49.6 ± 3.4	15.6 ± 2.3	19.9 ± 3.5	32.3 ± 3.6
Median	49.1	16.0	19.6	32.4
Range	41.0–60.2	10.0–21.0	13.5–51.3	22.3–41.2
Women:
Number	130	130	130	130
Mean ± SD	43.7 ± 2.3	12.7 ± 2.2	16.4 ± 2.1	28.7 ± 3.7
Median	43.6	12.0	16.5	28.7
Range	38.3–49.3	8.0–18.0	10.5–21.9	19.8–37.6

ISSN: 1471-2474