Modular prosthesis
AssigneeDePuy Inc.
InventorsCharles A. Rockwood, Jr., John A. Engelhardt, Jeffrey M. Ondrla
Life of this patent
Estimating the term…
Abstract
A modular shoulder prosthesis for the replacement of a portion of the humerus is provided. The prosthesis is assembled from a kit that includes a stem sized to be received in the humerus, a body sized to replace a portion of the humerus, the body being attachable to the stem, and a head member sized to replace the head of the humerus, the head member being eccentrically attachable to the body. A collar is inserted between the head member and the body to help stabilize the assembled prosthesis.
Claims45
A kit for the assembly of a modular shoulder prosthesis for the replacement of a head, neck, and adjacent portions of a humerus, the kit comprising
- at least two stems, with each stem sized for insertion into the humerus,
- at least two bodies, with each body sized to replace a portion of the humerus, and with each body configured to receive in fixed attachment one of the at least two stems,
- at least two head members, with each head member sized to replace the head of the humerus, and
- means for fixedly attaching one of the at least two head members to one of the at least two bodies.
An implant apparatus for replacing a portion of a humerus, the implant comprising
- a body formed to define a first and second bore therein,
- a stem having an upper portion and a lower portion, the lower portion being sized to be received in a shaft of a humerus and the upper portion configured to fit in the first bore of the body, and
- a head member sized to replace a head portion of the humerus, the head member having an attached lock finger configured to fit in the second bore of the body.
An implant apparatus for replacing a portion of a humerus, the implant comprising
- a body formed to define a bore therein,
- a head member sized to replace a head portion of the humerus,
- means for eccentric attachment of the head member to the body to allow adjustable positioning of the head member relative to the body.
A kit for the assembly of a modular bone joint prosthesis for the replacement of a head, neck, and adjacent portions of a bone, the kit comprising
- at least two stems, with each stem sized for insertion into a cavity of the bone,
- at least two bodies, with each body sized to replace a portion of the bone, and with each body configured to be joined in fixed attachment to one of the at least two stems,
- at least two head members, with each head member sized to replace a head portion of the bone, and
- means for fixedly attaching one of the at least two head members to one of the at least two bodies.
A kit for the assembly of a modular bone joint prosthesis for the replacement of a head, neck, and adjacent portions of a bone, the kit comprising
- at least two stems, with each stem sized for insertion into a cavity of the bone,
- at least two bodies, with each body sized to replace a portion of the bone, and with each body configured to be joined in fixed attachment to one of the at least two stems,
- at least two head members, with each head member sized to replace a head portion of the bone,
- means for fixedly attaching one of the at least two head members to one of the at least two bodies, and
- wherein at least one of the stems is attached to at lead one of the bodies with external threads defined on the at least one stem and internal threads defined in a bore in the at least one body for threaded engagement of the stem and the body.
The kit for the assembly of a modular bone joint prosthesis for the replacement of a head, neck, and adjacent portions of a bone, the kit comprising
- at least two stems, with each stem sized for insertion into a cavity of the bone,
- at least two bodies, with each body sized to replace a portion of the bone, and with each body configured to be joined in fixed attachment to one of the at least two stems,
- at least two head members, with each head member sized to replace a head portion of the bone,
- means for fixedly attaching one of the at least two head members to one of the at least two bodies, and
- wherein the means for fixedly attaching one of the at least two head members to one of the at least two bodies further comprises a lock finger attached to one of the at least two head members, the lock finger being formed to define a lock element having a non-circular cross section to prevent rotation of the lock finger relative to the one of at least two bodies.
An implant apparatus for replacing a joint portion of a bone, the implant comprising
- a body formed to define a first and second bore therein,
- a stem having an upper portion and a lower portion, the lower portion being sized to be received in a cavity of the bone and the upper portion configured to fit in the first bore of the body, and
- a head member sized to replace a head portion of the bone, the head member having an attached lock finger configured to fit in the second bore of the body.
An implant apparatus for replacing a joint portion of a bone, the implant comprising
- a body formed to define a bore therein,
- a head member sized to replace a head portion of the bone,
- means for eccentric attachment of the head member to the body to allow adjustable positioning of the head member relative to the body.
Dependencies are inferred from the claim text.