Artificial acetabulum

Details Artificial acetabulum Artificial acetabulum

1994-08-02

1996-04-16

Isabella, David

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

623 18, A61F 234

Patent

active

055078281

ABSTRACT:
The acetabulum has an outer shell (1) which is composed of several relatively rigid outer shell segments (1a, 1c) that are interconnected by resilient regions. The outer shell (1) has regions of high shape stability which are elastically connected to each other. The outer shell segment (1) in the region of the direction of main loading (F) is made as an attachment zone (1a) and has apertures for bone screws and a guiding and attachment bore (3) for an inner shell (10). The guiding bore (3) is with respect to the whole outer shell (1) situated at the pole (P2). In the region of main loading (F) the outer shell (1), that is the attachment zone (1a), bears, engaged by shape, onto the inner shell (10), whereas the remaining outer shell segments (1c) have a spacing (D) from the inner shell (10), so that by the bell-like suspension of the inner shell (10) at the pole (P2) the inner shell is movable, particularly perpendicularly, to the axis (18), while damping elements (13a) of the inner shell (10) transmit onto the outer shell (1) particularly impact forces in a dampened manner.

REFERENCES:
patent: 4936861 (1990-06-01), Muller et al.
patent: 4961748 (1990-10-01), Frey et al.
patent: 5074881 (1991-12-01), Thull et al.
patent: 5108448 (1992-04-01), Gautier
patent: 5376122 (1994-12-01), Pappas et al.

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