Provisional orthopedic prosthesis for partially resected bone
First Claim
1. A provisional orthopedic prosthesis for facilitating the selection of a permanent orthopedic prosthesis having a permanent component with a bone engaging surface, an oppositely disposed articulating surface and defining a permanent component spacing therebetween, said provisional prosthesis comprising:
- a first provisional component having an inwardly facing surface and an outwardly facing surface;
said inwardly facing surface having a first portion defining a configuration substantially similar to a portion of the bone engaging surface of the permanent component and a second portion adapted for placement facing a non-resected bone surface;
said outwardly facing surface defining a first articulating surface at least partially disposed opposite each of said first and second portions of said inwardly facing surface and defining a provisional spacing between said outwardly facing surface and said first portion greater than said permanent component spacing.
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Accused Products
Abstract
A provisional orthopedic prosthesis having a first provisional component and an optional second component. The provisional prosthesis may be a partial knee prosthesis and is used to assess the fit of a permanent prosthesis having first and second components. The first provisional component has a size which differs from the first permanent component and is mountable on a bone which has been only partially prepared to receive the first permanent component. Providing a provisional component which is mounted on a partially prepared bone, simplifies the preparation of the bone for a differently sized component if the provisional indicates that the preliminarily selected permanent component is incorrectly sized.
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Citations
23 Claims
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1. A provisional orthopedic prosthesis for facilitating the selection of a permanent orthopedic prosthesis having a permanent component with a bone engaging surface, an oppositely disposed articulating surface and defining a permanent component spacing therebetween, said provisional prosthesis comprising:
a first provisional component having an inwardly facing surface and an outwardly facing surface;
said inwardly facing surface having a first portion defining a configuration substantially similar to a portion of the bone engaging surface of the permanent component and a second portion adapted for placement facing a non-resected bone surface;
said outwardly facing surface defining a first articulating surface at least partially disposed opposite each of said first and second portions of said inwardly facing surface and defining a provisional spacing between said outwardly facing surface and said first portion greater than said permanent component spacing.- View Dependent Claims (2, 3, 4, 5, 6)
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7. A provisional orthopedic prosthesis for facilitating the selection of a permanent orthopedic prosthesis having a permanent component with a bone engaging surface defining a plurality of intersecting planar surfaces, an oppositely disposed articulating surface and defining a permanent component spacing therebetween, said provisional prosthesis comprising:
a first provisional component having an inwardly facing surface and an outwardly facing surface;
said inwardly facing surface having a first portion defining a substantially planar surface lying within a single plane and configured substantially similar to a portion of the bone engaging surface of the corresponding permanent prosthesis and a second portion positionable proximate a non-resected bone surface;
said outwardly facing surface defining a first articulating surface at least partially disposed opposite each of said first and second portions of said inwardly facing surface and defining a provisional spacing between said outwardly facing surface and said first portion greater than the permanent component spacing.- View Dependent Claims (8, 9, 10, 11, 12)
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13. An orthopedic prosthesis system comprising:
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a permanent prosthesis including a first permanent component defining a bone engaging surface and an oppositely disposed articulating surface, said bone engaging surface and said articulating surface defining a permanent component spacing therebetween; and
a first provisional component having an inwardly facing surface and an outwardly facing surface, said inwardly facing surface having a first portion defining a configuration substantially similar to a portion of said bone engaging surface and a second portion adapted for placement facing a non-resected bone surface, said outwardly facing surface defining a first articulating surface at least partially disposed opposite each of said first and second portions of said inwardly facing surface and defining a provisional component spacing between said outwardly facing surface and said first portion, said provisional component spacing being greater than said permanent component spacing, said provisional component defining a second thickness between said second portion of said inwardly facing surface and said outwardly facing surface wherein a substantial portion of said second thickness is less than the difference between said provisional component spacing and said permanent component spacing. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method of implanting an orthopedic prosthesis at a joint between a first bone and a second bone, said method comprising:
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providing a provisional prosthesis and a corresponding permanent prosthesis, said permanent prosthesis having first and second permanent components, said first permanent component having a bone engaging surface and an oppositely disposed articulating surface defining a permanent component spacing therebetween, said provisional prosthesis having a first provisional component having an inwardly facing surface and an outwardly facing surface, said inwardly facing surface having a first portion defining a configuration substantially similar to a portion of said bone engaging surface and a second portion adapted for placement facing a non-resected bone surface;
partially preparing the first bone to receive the permanent component;
mounting the first provisional component on the first bone wherein said outwardly facing surface of said first provisional component opposite said first portion of said inwardly facing surface is spaced outwardly from the bone by a distance which is greater than said permanent component spacing;
assessing the fit of said provisional prosthesis; and
completing the preparation of the first bone after assessing the fit of said provisional prosthesis. - View Dependent Claims (20, 21, 22, 23)
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Specification