Abstract
A follow-up study of osteosynthesis using cancellous screw was conducted in 15 women with intracapsular femoral neck fracture, aged 51-76 (mean 65 years). The average follow-up period was 2.8 years (range: 1.5 to 12 years).
On follow-up radiograph, the interval until fusion and the frequency of late segmental collapse (LSC) were examined. (1) The type of fracture (Garden's classification), (2) the distance from the top of the cancellous screw to end plate, and (3) the collodiaphyseal angle in LSC(+) group were compared to those in LSC(-) group.
Fracture union was obtained in all cases a mean period of 3.9 months after surgery. LSC occurred in 5 cases average 12 months after surgery. (1) Two cases were in stage II, 1 in stage III and 2 in stage IV in LSC(+) group, while 5 cases were in stage I, 2 in stage II and 3 in stage III in LSC(-) group. (2) The mean distance from the top of the screw to end plate was 9.5mm in LSC(+) group, and 6.9mm in LSC(-) group. The collodiaphysealangle was 142.8°in LSC(+) group and 147.6°in LSC(-) group.
It was concluded that the most important factor in the occurrence of LSC was the staging of displacement of the femoral head (Garden).
