INTERPRETATION There was a clinical ly relevant association between early migration of acetabular cups  and late revision due to loosening .
BACKGROUND AND PURPOSE The association between excessive early migration of acetabular cups  and late aseptic revision has been scantily reported .
We therefore performed 2 parallel systematic review s and meta-analyses to determine the association between early migration of acetabular cups  and late aseptic revision .
Hydroxyapatite coated hip prosthesis followed up for 5 years
Abstract . We prospect ively studied 250 patients with a proximal hydroxyapatite coated hip prosthesis .  The follow-up period was 5 years . All components showed osseointegration except for one deep infection . The morphology of bone remodeling with either endosteal bone formation or periosteal bone formation was dependent on the way the stem filled the medullary canal . No linear or distal osteolysis around the stems was observed . Résumé . 250 patients avec une prothèse de la hanche revêtue d ' hydroxyapatite  ont été étudiés avec un suivi de 5 années . Tous les composants ont montré une ostéointégration à l'exception d'un cas avec une infection profonde . La formation osseuse endostée ou periostée était dépendante du remplissage du canal médullaire par la tige . Aucune ostéolyse autour des tiges n'a été observée
INTERPRETATION There was a clinical ly relevant association between early migration of acetabular cups  and late revision due to loosening .
BACKGROUND AND PURPOSE The association between excessive early migration of acetabular cups  and late aseptic revision has been scantily reported .
We therefore performed 2 parallel systematic review s and meta-analyses to determine the association between early migration of acetabular cups  and late aseptic revision .