Patient-specific guide for total prosthetic knee revision
Inventors
Siccardi, Francesco • Bernardoni, Massimiliano • PARRINELLO, Andrea • GARGANTINI, Gianluca
Assignees
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Publication Number
US-12733941-B2
Publication Date
2026-09-15
Expiration Date
Abstract
A femoral component and a tibial component are respectively configured to exclusively couple with the distal end of a femur bearing a femoral prosthesis and with the proximal end of a tibia bearing a tibial prosthesis. The femoral component has a distal portion configured to face the distal end of the femur, bearing distal positioning holes facing a distal region of the femoral prosthesis. A frontal portion extends on the continuation of the distal portion and has a first abutment area operating against the femur bone part and a second area facing a frontal region of the femoral prosthesis. The frontal portion has at least two guide holes at the first abutment area, and at least two frontal positioning holes at the second area.
Core Innovation
The invention describes a patient-specific femoral and tibial surgical guide for total knee revision, shaped from patient anatomy to couple uniquely against bone and the existing prosthesis. The guide has components corresponding to the femur and tibia, and alignment features preserve the planned guide position after prosthesis removal. This arrangement supports bone preparation and resection before placement of a revision knee prosthesis.
The disclosure describes femoral and tibial guide configurations having contact areas, positioning holes, and optional centring housings. The femoral component includes distal and frontal portions with positioning holes, parallel guide holes, and an abutment area. These guide components coordinate with patient anatomy to establish accurate alignment and support bone preparation prior to receiving revision prosthetic components.
Claims Coverage
The relevant claims identify one independent claim providing one inventive feature covering prosthetic knee revision using a femoral surgical guide component.
Femoral guide arrangement for knee revision
The claim describes a femoral guide component configured to fit against a prosthesis-bearing distal femur, having a distal portion with distal positioning holes and a frontal portion with an abutment area, parallel guide holes, and frontal positioning holes. This guide arrangement uses alignment and positioning features to retain its planned position and support guided bone preparation and femoral resections before positioning a revision femoral prosthesis.
The independent claim centers on a femoral guide component with contact areas and positioning holes to support alignment and guided bone preparation in prosthetic knee revision.
Stated Advantages
Improves the precision and reliability of bone preparation and guide repositioning.
Documented Applications
Total knee revision surgical procedures, including femoral and tibial bone preparation and resection before placement of revision knee prostheses.
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