RADIOLOGICAL DETERMINATION OF THE SCREW P OSITION IN THE CONDYLE OF THE FEMUR - A METHOD OF EXACT PRESENTATION AND DETERMINATION OF LENGTH IN INTERNAL-FIXATION (SCREWS, K-WIRE) IN THE METAPHYSES OF LONG BONES SUCH AS THE DISTAL FEMUR

Distal femur imaging (A-P and lateral X-rays) after internal fixation often give only poor visualization of the exact position. A model with two anteriorly positioned cortex screws was used to show that an addi tional oblique X-ray, or fluoroscopy of the tip of the screw, allows m uch more exact determination of its length, so that it can be changed if necessary. This method is considered by the authors as a simple che ck of screw length measurement in ''foyer fermee'' procedures.