Prosthetic device with modular stem

Details Prosthetic device with modular stem Prosthetic device with modular stem

1989-12-12

1991-07-09

Isabella, David J.

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

Implantable prosthesis

Bone

623 18, A61F 232

Patent

active

050302345

ABSTRACT:
A modular stem type prosthesis is provided which includes a stem and an extension which are connected to one another with a slip fit interconnection that minimizes surface tensile forces in regions of the prosthesis adjacent the interface between the stem and the extension. Engagement between the stem and the extension is provided by deflectable end portions of one component of the prosthesis which are engaged in a mating deformation in the other component. The mating structures may define an interfitting ridge and groove. Micromotion between the respective parts may be prevents by a screw which may be tapered to achieve a lock fit. The extension may be of any selected length and any selected diameter in accordance with the needs of the patient.

REFERENCES:
patent: 4851007 (1989-07-01), Gray
patent: 4888023 (1989-12-01), Averill et al.
patent: 4938770 (1990-07-01), Frey et al.

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