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US 5,326,368 AGranted
Modular acetabular cup
AssigneeHowmedica, Inc.
InventorCarlos E. Collazo
Life of this patent
Estimating the term…
Abstract
A modular prosthetic acetabular cup for use in restorative hip replacement is disclosed. The acetabular cup is of modular construction whereby extension members can be attached to an acetabular cup to provide a acetabular cup device with a cross section of a desired configuration. The extension members can be attached to the acetabular cup by means including dovetail joints, mechanical fasteners, and locking taper joints similar to those in femoral hip components.
Claims15
A prosthetic acetabular cup, comprising:
- a first part defining an open hollow interior portion and having an outer surface including a first portion for engaging surface of a bone and a second portion;
- and
- a second part having an inner surface coupled to the second portion of said outer surface of the first part, said second part having an outer surface for engaging the bone wherein the outer surface of the second part and the first portion of the outer surface of the first part together form a substantially non-hemispherical surface adapted to be received in and for engaging the bone within an elongated acetabular cavity;
- and
- wherein said second outer surface portion of the first part defines at least one outwardly projecting member and said inner surface of the second part defines a complimentary shaped recess receiving said projecting member to form means for locking said first and second parts together;
- and
- wherein said projecting member comprises a rib extending around said second portion of said first part that mates with a groove defined in said second part and said locking means comprises a threaded element passing through a threaded hole in said second part and received in a recess in the first part.
4 more elements
A prosthetic acetabular cup, comprising:
- a first part defining an open hollow interior portion and having an outer surface including a first portion for engaging surface of a bone and a second portion;
- and
- a second part having an inner surface coupled to the second portion of said outer surface of the first part, said second part having an outer surface for engaging the bone wherein the outer surface of the second part and the first portion of the outer surface of the first part together form a substantially non-hemispherical surface adapted to be received in and for engaging the bone within an elongated acetabular cavity;
- and
- wherein said second outer surface portion of the first part defines at least one outwardly projecting member and aid inner surface of the second part defines a complimentary shaped recess receiving said projecting member to form means for locking said first and second parts together;
- and
- wherein said projecting member comprises an anti-rotation key having a square cross-section extending from said first part, received in a square, mating recess in said second part and said locking means further comprises a threaded element passing through said first part and received in a threaded hole in said second part.
4 more elements
A prosthetic acetabular cup, comprising:
- a first part defining an open hollow interior portion and having an outer surface including a first portion for engaging surface of a bone and a second portion;
- and
- a second part having an inner surface coupled to the second portion of said outer surface of the first part, said second part having an outer surface for engaging the bone wherein the outer surface of the second part and the first portion of the outer surface of the first part together form a substantially non-hemispherical surface adapted to be received in and for engaging the bone within an elongated acetabular cavity;
- and
- wherein said second outer surface portion of the first part defines at least one outwardly projecting member and said inner surface of the second part defines a complimentary shaped recess receiving said projecting member to form means for locking said first and second parts together;
- and
- wherein said projecting member comprises an anti-rotation key having a square cross-section extending from the first part, received in a square mating recession in the second part, and said locking means further comprises a second, tapered projection extending from the second portion of said first part for engaging a mating tapered recess in said second part.
4 more elements
A kit for forming a modular prosthetic acetabular cup comprising:
- at least one first part having an outer surface including a first portion thereof for engaging a surface of a bone and a second portion, and said part defining an open hollow interior portion;
- and
- a plurality of second parts each having an inner surface configured and dimensioned to engage the second portion of the outer surface of said at least one first part, said second part having an outer surface for engaging the bone wherein the outer surface of the first part are configured and dimensioned such that when said parts are engaged, said surfaces together form a substantially non-hemispherical surface adapted to be received in and for engaging the bone within an elongated acetabular cavity;
- and
- wherein said second outer surface portion of the first part defines at least one outwardly projecting member and said inner surfaces of said second parts define complimentarily shaped recesses adapted for receiving said projecting member to form means for locking said first and second parts together;
- and
- wherein said projecting member comprises an anti-rotation key having a square cross-section extending from said first part configured and dimensioned to be received in a square mating recess in said second parts, said kit further comprising at least one threaded fastener adapted to be received in a threaded hole in said second parts to form a part of said locking means.
4 more elements
A kit for forming a modular prosthetic acetabular cup comprising:
- at least one first part having an outer surface including a first portion thereof for engaging a surface of a bone and a second portion, and said part defining an open hollow interior portion;
- and
- a plurality of second parts each having an inner surface configured and dimensioned to engage the second portion of the outer surface of said at least one first part, said second part having an outer surface for engaging the bone wherein the outer surface of the first part ar configured and dimensioned such that when said parts are engaged, said surfaces together form a substantially non-hemispherical surface adapted to be received in and for engaging the bone within an elongated acetabular cavity;
- and
- wherein said second outer surface portion of the first part defines at least one outwardly projecting member and said inner surfaces of said second parts define complimentarily shaped recesses adapted for receiving said projecting member to form means for locking said first and second parts together;
- and
- wherein said projecting member comprises an anti-rotation key having a square cross-section extending from the first part, said anti-rotation key being configured and dimensioned to be received in a square mating recess in said second parts, and said locking means further comprises a second, tapered projection extending from the second portion of said first part configured and dimensioned to engage a mating tapered recess in said second part.
4 more elements
A kit for forming a modular prosthetic acetabular cup comprising:
- at least one first part having an outer surface including a first portion thereof for engaging a surface of a bone and a second portion, and said part defining an open hollow interior portion;
- and
- a plurality of second parts each having an inner surface configured and dimensioned to engage the second portion of the outer surface of said at least one first part, said second part having an outer surface for engaging the bone wherein the outer surface of the first part are configured and dimensioned such that when said parts are engaged, said surfaces together form a substantially non-hemispherical surface adapted to be received in and for engaging the bone within an elongated acetabular cavity;
- and
- wherein said second outer surface portion of the first part defines at least one outwardly projecting member and said inner surfaces of said second parts define complimentarily shaped recesses adapted for receiving said projecting member to form means for locking said first and second parts together;
- and
- wherein said projecting member comprises a rib extending around said second portion of said first part configured and dimensioned to mate with a groove defined in said second parts and said kit further comprises a threaded element adapted to pass through a threaded hole in said second part and to be received in a recession in said first part to form a part of said locking means.
4 more elements
Dependencies are inferred from the claim text.