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Method and instrumentation for patello-femoral joint replacement

A technology of hip joints and joints, applied in the field of novel orthopedic joint replacement implants, which can solve the problem that the geometric shape of the knee joint cannot be matched, there is no disclosed device or method for assisting the surgeon in accurately implanting the device, and there is no maintenance of the femur Anatomical contours and other issues

Inactive Publication Date: 2005-06-29
巴奥米特西班牙整形公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Devices and methods for instructing or guiding surgeons in bone preparation for improved device implantation are not disclosed
The claims in U.S. Patent No. 5,609,644 propose a patellofemoral joint, however, describe only the knee cap replacement component in detail and do not disclose an apparatus or method to assist the surgeon in accurately implanting the device
The system disclosed by Stein does not maintain the anatomical contour of the femur and requires several additional steps in the procedure, thus complicating and tending to complicate the procedure
Unlike the present invention, Stein's method is additionally traumatic due to greater bone loss through Stein's machining of the femoral groove, and at the same time does not conform to standard overall knee geometry, so the implant will Inability to make simple fixes when necessary

Method used

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  • Method and instrumentation for patello-femoral joint replacement
  • Method and instrumentation for patello-femoral joint replacement
  • Method and instrumentation for patello-femoral joint replacement

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Embodiment Construction

[0023] The present invention provides a system comprising a patellofemoral replacement device, a series of instruments, and a method of implanting a patellofemoral replacement device using the instruments.

[0024] The patellofemoral joint replacement device generally includes two connecting parts, a femoral implant and Figure 2A -The patella implant denoted by 12 in B, wherein the femoral implant is in Figure 1A -C is denoted by reference numeral 10.

[0025] From Figure 1A As best seen in -C, the femoral implant 10 is designed to replace the anterior surface of the patient's distal femur. The femoral implant 10 includes an anatomically shaped superior surface 14 with a centrally and longitudinally oriented generally concave shaped articular groove 16 .

[0026] From Figure 1A As clearly shown in FIG. 2 , the lower side 18 of the femoral implant 10 comprises at least one, but preferably a plurality of, pockets 20 , at least one intramedullary rod 22 , and an undercut edg...

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Abstract

The present invention provides a patellofemoral prosthesis (10) that provides smooth articulation of the articulating surfaces throughout the full range of motion. At the same time, the present invention also provides a novel structure of the femoral implant component (12) that facilitates super-strong bonding to the femoral head. Also available is a patellofemoral arthroplasty system that utilizes precise, reproducible bone preparation techniques that are unique in that they minimize the complexity of subsequent revision and complete knee arthroplasty procedures. The present invention also provides a drill guide (90) and a cutting guide (44), each of which is configured to provide three-point stability during surgery.

Description

technical field [0001] The present invention relates generally to novel orthopedic joint replacement implants and methods, and in particular to improved methods for performing patellofemoral joint replacements through simpler, less invasive surgical procedures using instrumented, reproducible incisions methods and systems. Background technique [0002] Patellofemoral replacement is a well known orthopedic surgery. Various conventional joint replacement devices have been used since the seventies, however, unlike artificial joints commonly used in total knee replacement surgery, conventional patellofemoral replacement devices have not gained widespread acceptance in the orthopedic field . This may be due to somewhat mixed clinical results, which have been demonstrated for conventional patellofemoral arthroplasties in the relevant medical literature. This conventional prosthesis typically includes a femoral component, which is a large, bulky device that is contoured to fit w...

Claims

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Application Information

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IPC IPC(8): A61B17/58A61B17/15A61B17/16A61B17/17A61B19/00A61F2/00A61F2/30A61F2/38A61F2/46
CPCA61B17/155A61B17/1659A61B17/1675A61B17/1764A61F2/30767A61F2/30771A61F2/3859A61F2/3877A61F2002/30004A61F2002/30327A61F2002/30807A61F2002/30822A61F2002/30841A61F2002/30878A61F2002/30891A61F2002/4631A61F2250/0014A61F2250/0039A61B2090/061
Inventor W·F·阿本德沙因
Owner 巴奥米特西班牙整形公司
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