US Patent No: 5,540,696
Number of patents in Portfolio can not be more than 2000
Instrumentation for use in orthopaedic surgery
Stats
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Jul 30, 1996
Issued date -
Jan 6, 1995
filing date -
08/369,226
serial no -
In Force
status
Importance
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Abstract
The instrumentation set of this invention assists the surgeon in selecting the proper implant components, in determining the amount of distal bone to resect, and in aligning instrumentation designed to resect the bone. The instrumentation set provides numerous systems for verifying to the surgeon that he has correctly aligned the instruments prior to removing any bone. The set includes a rotational alignment guide, which aids the surgeon in establishing the appropriate rotational alignment for the knee as determined by reference to standard femoral landmarks such as the posterior condyles and epicondyles. The rotational alignment guide includes a slot for guiding a saw blade for removal of the posterior condyles of the femur. The set further includes a tensor designed to tense the knee joint in flexion and extension. The tensor is activated by a torque wrench so that a measured amount of tension force can be applied to the joint. The tensor is configured to slidably carry sizing rods, which contact the femur and include a plurality of markings, which relate to the size of the femur as well as the spacing between the femur and tibia. This information is used by the surgeon to select the proper size of femoral and tibial articulate surface components. The sizing rods are connected to the tensor when the tibial is in flexion and in extension, which will indicate to the surgeon any variation required in the amount of bone to be resected.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,567,886 Flexion spacer guide for fitting a knee prosthesis | 94 | 1983 | |
| 4,501,266 Knee distraction device | 147 | 1983 | |
| 5,344,423 Apparatus and method for milling bone | 89 | 1992 | |
| 5,342,368 Intramedullary universal proximal tibial resector guide | 95 | 1992 | |
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| 5,116,338 Apparatus for knee prosthesis | 88 | 1991 | |
| 5,213,112 Tension meter for orthopedic surgery | 67 | 1992 | |
| 5,417,695 Instrumentation for preparing a distal femur | 83 | 1992 | |
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| 5,364,401 External alignment system for preparing a femur for an implant | 106 | 1992 | |
| 5,342,367 Rotationally and angularly adjustable tibial cutting guide and method of use | 71 | 1993 | |
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| 5,454,816 Femoral cutting guide | 145 | 1994 | |
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| 4,938,762 Reference system for implantation of condylar total knee prostheses | 82 | 1988 | |
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| 4,574,794 Orthopaedic bone cutting jig and alignment device | 111 | 1984 | |
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| 5,282,803 Instrumentation for long stem surgery | 89 | 1992 | |
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| 4,655,197 Lavage system with variable frequency, flow rate and pressure | 71 | 1982 | |
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| 4,566,448 Ligament tensor and distal femoral resector guide | 73 | 1983 | |
| 4,703,751 Method and apparatus for resecting a distal femoral surface | 158 | 1986 | |
| 4,907,578 Method and instruments for resection of the distal femur | 18 | 1988 | |