Self-locking modular prosthesis

Assignee: DePuy Orthopaedics, Inc.

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Quick Facts

Patent No.: US 7,122,056
App. No.: 10/791,027
Granted: Oct 17, 2006
Kind: B2

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Abstract

A modular prosthesis is disclosed that includes a neck member having a tapered neck body. The modular prosthesis further includes a sleeve component having a first elongated tapered bore. The tapered neck body is received within the first elongated tapered bore so as to taper lock the sleeve component to the neck member. The modular prosthesis also includes a stem member configured to be implanted into a medullary canal of a bone. One of the neck member and the stem member includes a second elongated tapered bore. The other of the neck member and the stem member includes a tapered post that is received within the second tapered bore so as to taper lock the neck member to the stem member.

Claims (73)

1. A modular prosthesis, comprising:

a neck member having a tapered neck body, a head-receiving support member, and a tapered post, said neck member defining a terminal distal end;

a sleeve component having a first elongated tapered bore, said tapered neck body being received within said first elongated tapered bore so as to taper lock said sleeve component to said neck member;

a stem member having a second elongated tapered bore, said stem member configured to be implanted into a medullary canal of a bone; and

a head member defining a coupler bore, said head-receiving support member of said neck member being received within said coupler bore,

wherein said sleeve component is located completely outside of said coupler bore of said head member,

wherein said tapered post of said neck member is received within said second elongated tapered bore of said stem member so as to taper lock said neck member to said stem member,

wherein said stem member is located completely outside of said first elongated tapered bore,

wherein said terminal distal end of said neck member is located within an interior space of said stem member,

wherein said stem member has a post-receiving opening defined therein,

wherein said second elongated tapered bore defines a distal end,

wherein said second elongated tapered bore extends between said post-receiving opening and said distal end,

wherein said second elongated tapered bore is continuously tapered from said post-receiving opening to said distal end, and

wherein said sleeve component has defined therein a proximal opening and a distal opening,

wherein said first elongated tapered bore extends between said proximal opening and said distal opening, and

wherein said first elongated tapered bore is continuously tapered from said proximal opening to said distal opening.

2. The modular prosthesis of claim 1 , wherein:

said tapered post has a first end and second end, and

said tapered post is continuously tapered from said first end to said second end.

3. The modular prosthesis of claim 2 , wherein:

said tapered post has a first cross sectional diameter adjacent to said first end,

said tapered post has a second cross sectional diameter adjacent to said second end, and

said first cross sectional diameter is greater than said second cross sectional diameter.

4. A modular prosthesis, comprising:

a neck member having a tapered neck body, a head-receiving support member, and a tapered post, said neck member defining a terminal distal end;

a sleeve component having a first elongated tapered bore, said tapered neck body being received within said first elongated tapered bore so as to taper lock said sleeve component to said neck member;

a stem member having a second elongated tapered bore, said stem member configured to be implanted into a medullary canal of a bone; and

a head member defining a coupler bore, said head-receiving support member of said neck member being received within said coupler bore,

wherein said sleeve component is located completely outside of said coupler bore of said head member,

wherein said tapered post of said neck member is received within said second elongated tapered bore of said stem member so as to taper lock said neck member to said stem member,

wherein said stem member is located completely outside of said first elongated tapered bore,

wherein said terminal distal end of said neck member is located within an interior space of said stem member, and

wherein said tapered post is spaced apart from said tapered neck body.

5. The modular prosthesis of claim 4 , wherein said neck member further has a transition portion interposed between said tapered post and said tapered neck body.

6. A modular prosthesis, comprising: