Total elbow arthroplasty system

An elbow endoprosthesis for replacing an elbow comprising a ball and socket joint wherein said ball and socket joint comprises:

• a humeral component having a proximal end and a distal end, the humeral component comprising articulating surface disposed at the distal end, the articulating surface comprising a concave socket, the humeral mounting means disposed at the proximal end for mounting the humeral component on the distal humeral shaft;
• a radial component, the radial component comprising a radial body portion having a proximal end and a distal end, radial mounting means disposed at the distal end of the radial body portion for mounting the radial component on the proximal radial shaft, and a radial engagement portion attached to the proximal end of the radial body portion;
• and
• a ball component, the ball component comprising a spherical articular surface for articulation with the concave socket, said ball component adapted to be mounted on the radial engagement portion.

A method for implanting an elbow endoprosthesis in an elbow joint, comprising the steps of:

• removing the trochlea of the humerus;
• removing the articular surface of the radius and cancellous bone from the proximal medullary canal of the radius;
• and, in any order,
• implanting a humeral component into the medullary canal of the humerus;
• and
• implanting a radial component, which is adapted to receive a ball component thereon, into the medullary canal of the radius;
• wherein the humeral component comprises
• (i) a condylar portion adapted to be received in a resected portion of a distal humerus between the medial and lateral aspects of the humeral condyle, the condylar portion having a proximal end and a distal end, an isometric articulating surface disposed at the distal end, the articulating surface comprising a concave socket, and
• (ii) a humeral stem portion attached to the proximal end of the condylar portion, the humeral stem adapted to be received in the medullary canal of the distal humeral shaft, the humeral stem portion angled cranially with respect to the condylar portion to approximate the original angle between the humeral condylar and the humeral shaft;
• and wherein the radial component comprises:
• (i) a radial body portion having a proximal face and a distal face;
• (ii) a radial stem portion attached to the distal face of the radial body portion adapted to be received in the medullary canal of a proximal radial shaft;
• and
• (iii) a radial engagement portion attached to the proximal face of the radial body portion;
• and wherein the ball component comprises a spherical articular surface for articulation with the concave socket, said ball component adapted to be mounted on the radial engagement portion.

A method of replacing a quadruped's elbow comprising:

• removing the humeral trochlea and the articular surface of the radius of the quadruped's elbow joint;
• and
• affixing a ball and socket endoprosthestic joint in place of the removed humeral trochlea and articular surface of the radius wherein the endoprosthetic joint comprises:
• a humeral component, the humeral component comprising
• (i) a condylar portion adapted to be received in a resected portion of a distal humerus between the medial and lateral aspects of the humeral condyle, the condylar portion having a proximal end and a distal end, an isometric articulating surface disposed at the distal end, the articulating surface comprising a concave socket, and
• (ii) a humeral stem portion attached to the proximal end of the condylar portion, the humeral stem adapted to be received in the medullary canal of the distal humeral shaft, the humeral stem portion angled cranially with respect to the condylar portion to approximate the original angle between the humeral cordylar and the humeral shaft;
• a radial component, the radial component comprising:
• (i) a radial body portion having a proximal face and a distal face;
• (ii) a radial stem portion attached to the distal face of the radial body portion adapted to be received in the medullary canal of a proximal radial shaft;
• and
• (iii) a radial engagement portion attached to the proximal face of the radial body portion;
• and wherein the ball component comprises a spherical articular surface for articulation with the concave socket, said ball component adapted to be mounted on the radial engagement portion.