Cup-shaped hip joint implant, is divided into rigid zone used for fixation at head of hip cavity and flexible, resilient zone
The cup (1) is divided into two zones. The rigid zone (A) is impacted into the hip bone cavity, and situated at its head. The zone (B) which is flexible, resilient and deformable following impaction between the front and rear bony projections. Only the rigid has provision for fixation into the cavit...
Gespeichert in:
Hauptverfasser: | , , , , , , , , |
---|---|
Format: | Patent |
Sprache: | eng ; fre |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | The cup (1) is divided into two zones. The rigid zone (A) is impacted into the hip bone cavity, and situated at its head. The zone (B) which is flexible, resilient and deformable following impaction between the front and rear bony projections. Only the rigid has provision for fixation into the cavity. Two radial slots (1b, 1c) commence at the circular edge of the cup. They converge towards a central angle of 100-130[deg] in the polar zone, to delimit the flexible zone. The angle is preferably about 110[deg]. The slot width is set to about 0.5-1 mm, to control elasticity. Each slot terminates in a formation resembling a water droplet. The rigid zone has holes to engage screw fastenings. Edge ridges (1h) preventing release cooperate with the locked and adjusted, screwed fitting. An edge lip (2b) of the core (2) fits a groove in the cup. The groove has anti-rotation projections (1k) which locate in the thickness of the core during impaction.
L'implant cotyloïdien comprenant un anneau ou cupule métallique (1) de forme générale hémisphérique recevant un noyau ou insert (2) pour la libre articulation d'une tête fémorale de prothèse de hanche, est remarquable en ce que la cupule (1) présente des agencements aptes à délimiter deux zones distinctes à savoir :- une zone rigide (A) située, après impaction dans la cavité cotyloïdienne de l'os iliaque, au niveau du toit acétabulaire ;- une zone souple (B) apte à être déformée par élasticité située, après impaction, sensiblement entre les cornes antérieure et postérieure ;- seule la zone rigide (A) présente des moyens de fixation dans la cavité cotyloïdienne. |
---|