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Expandable proximal reamer

a proximal reamer and expandable technology, applied in the field of orthopaedics, can solve the problems of instability of the joint, particularly affecting the function of the proximal reamer, and the combination of all these biomechanic options is rather complex

Inactive Publication Date: 2008-11-06
DEPUY PROD INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently in total hip arthroplasty, a major critical concern is the instability of the joint.
Dislocation is particularly a problem in total hip arthroplasty.
The combination of all these biomechanic options is rather complex.
Improper anteversion can lead to dislocation and patient dissatisfaction.
However, it is a more challenging issue with the advent of stems with additional modularity.
Quite often the remaining bone is significantly compromised compared to a primary hip procedure.
Significant bone loss is observed, often with a lack of bone landmarks typically used for alignment.
The long stem trials do not have the transverse bolts and are thus not rotationally stable during trial reduction and therefore are not always used by the surgeon.

Method used

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  • Expandable proximal reamer
  • Expandable proximal reamer
  • Expandable proximal reamer

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Embodiment Construction

[0032]Embodiments of the present invention and the advantages thereof are best understood by referring to the following descriptions and drawings, wherein like numerals are used for like and corresponding parts of the drawings.

[0033]Referring now to FIG. 1 a long bone or femur 2 for use with the present invention is shown. The femur 2 includes an intermedullary canal 4 into which the prosthesis of the present invention may be inserted. The femur 2 is resected along resection line 6 by, for example, a power tool, for example, a saw. The resecting of the long bone or femur 2 exposes the intermedullary canal 4 of femur 2. A distal or cylindrical reamer 8 that may be a standard commercially available reamer is positioned in the intermedullary canal 4 of the long bone 2 to form cavity 10 for receiving an orthopedic joint implant. The distal reamer 8 includes a plurality of longitudinally extending channels, or flutes 12 which are used to remove bone and other biological matter from the i...

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Abstract

A reamer for reaming a portion of a long bone cavity for use in implanting a joint prosthesis. The reamer is used in cooperation with a portion of an orthopaedic implant component and includes an expandable body that is adapted to adjust between a plurality of diameters. A plurality of cutting edges are also included and extend outwardly from the body, the edges adapted for cooperation with bone, and the cutting edges expanding as the expandable body expands.

Description

TECHNICAL FIELD OF THE INVENTION[0001]The present invention relates generally to the field of orthopaedics, and more particularly, to an implant for use in arthroplasty.BACKGROUND OF THE INVENTION[0002]Patients who suffer from the pain and immobility caused by osteoarthritis and rheumatoid arthritis have an option of joint replacement surgery. Joint replacement surgery is quite common and enables many individuals to function properly when it would not be otherwise possible to do so. Artificial joints are usually comprised of metal, ceramic and / or plastic components that are fixed to existing bone.[0003]Such joint replacement surgery is otherwise known as joint arthroplasty. Joint arthroplasty is a well-known surgical procedure by which a diseased and / or damaged joint is replaced with a prosthetic joint. In a typical total joint arthroplasty, the ends or distal portions of the bones adjacent to the joint are resected or a portion of the distal part of the bone is removed and the arti...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B17/16
CPCA61B17/164A61B17/1617
Inventor SACKETT, SAMUEL G.CARR, JONATHAN E.
Owner DEPUY PROD INC
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