Prosthetic implant having segmented flexible stem

Details Prosthetic implant having segmented flexible stem Prosthetic implant having segmented flexible stem

2005-05-03

2005-05-03

Philogene, Pedro (Department: 3732)

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

Implantable prosthesis

Bone

C623S023170, C623S023240

Reexamination Certificate

active

06887278

ABSTRACT:
A prosthetic implant having a fixation stem with varying stiffness is disclosed. The stem comprises an elongated core and segments extending outward from the core. The segments are spaced apart so as to define transverse grooves surrounding the core between adjacent segments. The longitudinal length of the grooves, and the materials used for the core and the segments are selected such that the stiffness of the stem varies from the proximal end to the distal end. Typically, the stiffness of the stem will be lower at the distal end such that the distal end of the stem bears less force when loaded and thereby transfers more load to the proximal end of the stem, which has a higher stiffness. As a result, stress shielding, in which the load bypasses the proximal end of the stem, is minimized and bone resorption adjacent the proximal end of the stem is decreased.

REFERENCES:
patent: 2719522 (1955-10-01), Hudack
patent: 3067740 (1962-12-01), Harboush
patent: 3781917 (1974-01-01), Mathys
patent: 3818512 (1974-06-01), Shersher
patent: 3987499 (1976-10-01), Scharbach et al.
patent: 3996625 (1976-12-01), Noiles
patent: 4059854 (1977-11-01), Laure
patent: 4146936 (1979-04-01), Aoyagi et al.
patent: 4292695 (1981-10-01), Koeneman
patent: 4314381 (1982-02-01), Koeneman
patent: 4355428 (1982-10-01), Deloison et al.
patent: 4404691 (1983-09-01), Buning et al.
patent: 4407022 (1983-10-01), Heimke et al.
patent: 4531915 (1985-07-01), Tatum, Jr.
patent: 4668290 (1987-05-01), Wang et al.
patent: 4693724 (1987-09-01), Rhenter et al.
patent: 4808186 (1989-02-01), Smith
patent: 4878919 (1989-11-01), Pavlansky et al.
patent: 4921501 (1990-05-01), Giacometti
patent: 4986834 (1991-01-01), Smith et al.
patent: 4997444 (1991-03-01), Farling
patent: 5007931 (1991-04-01), Smith
patent: 5092899 (1992-03-01), Forte
patent: 5108450 (1992-04-01), Horber et al.
patent: 5181928 (1993-01-01), Bolesky et al.
patent: 5316550 (1994-05-01), Forte
patent: 5336265 (1994-08-01), Serbousek et al.
patent: 5462563 (1995-10-01), Shearer et al.
patent: 5507830 (1996-04-01), DeMane et al.
patent: 5509935 (1996-04-01), Fosco et al.
patent: 5591233 (1997-01-01), Kelman et al.
patent: 5702482 (1997-12-01), Thongpreda et al.
patent: 5725586 (1998-03-01), Sommerich
patent: 5824097 (1998-10-01), Gabriel et al.
patent: 6071311 (2000-06-01), O'Neil et al.
patent: 6312473 (2001-11-01), Oshida
patent: 2223172 (1990-04-01), None
patent: WO 8606954 (1986-12-01), None
patent: WO 8901321 (1989-02-01), None

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