Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1993-02-12
1995-04-11
Isabella, David
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
A61E 228
Patent
active
054053889
ABSTRACT:
A bone biopsy implant having a short cylindrical collar (15) with a removable tapered inner sleeve (40) which together act to facilitate bone sample collection and endoscopic access to the medullary compartment of bone. The collar (15) is provided with a biocompatible outer surface that secures with flutes (17) to resist rotation and circumferential beads (16) to resist pull-out forces. The collar walls on the fluted end strains towards the centerline to facilitate insertion or removal in a hole. The collar (15) is further provided with a flange on one face that has a ramp (18) shaped surface on its end that act together with a similar ramp (20) on the tapered sleeve (40) to cause longitudinal translation of the sleeve when rotated. This sleeve is comprised of three components consisting of a short cylindrical cap (11) that is contoured on the end and has flat regions on the surface suitable for use with a socket wrench, a fluted cylindrical basket (12) that cuts and contains the bone and marrow sample and a cylindrical end-cap (13 ) having a plurality of threads. The implant includes provision for its insertion and explantation, repeated sampling of bone tissue and fixation and introduction of endoscopic instrument in bone.
REFERENCES:
patent: 4880006 (1989-11-01), Albrektsson et al.
patent: 4936851 (1990-06-01), Fox, Jr. et al.
Brittingham Debra S.
Isabella David
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