Abstract
To clarify the clinical results obtained with the use of short femoral nails for femoral trochanteric fracture, we investigated the relationship between the type of reduction and the amount of lag screw telescoping in 47 hips (7 men and 40 women). The average patient age at the time of surgery was 85.3 years (range 74-95 years). Nine types of reduction were classified on the basis of the antero-posterior (AP) and lateral views on X-ray films. The amount of telescoping was significantly increased when the proximal fragment was found to be displaced posteriorly in the lateral view. In the AP view, there were no significant differences among the groups. The present results suggest that prevention of posterior displacement of the proximal fragment at the time of reduction is important for minimizing the amount of telescoping.
