Article

Today, dislocated femoral neck fractures are commonly treated with a
cemented hip arthroplasty. However, cementing of the femoral component may lead
to adverse effects and even death. Uncemented stems may lower these risks and
hydroxyapatite (HA) coating may enhance integration, but prosthetic stability and
clinical outcome in patients with osteoporotic bone have not been fully explored.
We therefore studied fixation and clinical outcome in patients who had had a
femoral neck fracture and who had received a fully HA-coated stem prosthesis.
PATIENTS AND METHODS: 50 patients with a dislocated femoral neck fracture were
operated with the fully HA-coated Corail total or hemiarthroplasty. 38 patients,
mean age 81 (70-96) years, were followed for 24 months with conventional
radiographs, RSA, DEXA, and for clinical outcome. RESULTS: 31 of the 38 implants
moved statistically significantly up to 3 months, mainly distally, mean 2.7 mm
(max. 20 mm (SD 4.3)), and rotated into retroversion mean 3.3 masculine (-1.8 to
17) (SD 4.3) and then appeared to stabilize. Distal stem migration was more
pronounced if the stem was deemed to be too small. There was no correlation
between BMD and stem migration. The migration did not result in any clinically
adverse effects. INTERPRETATION: The fully hydroxyapatite-coated Corail stem
migrates during the first 3 months, but clinical outcome appears to be good,
without any adverse events.

Langue : ANGLAIS