Distal femoral cutting guide apparatus with anterior or posterior referencing for use in knee joint replacement surgery
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United States of America Patent
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-
Feb 24, 1998
Grant Date -
N/A
app pub date -
Feb 21, 1996
filing date -
Nov 8, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A distal femoral sizing instrument includes an intramedullary rod for referencing the patient's intramedullary canal. A valgus module mounts to the intramedullary rod at a bore of the valgus. The bore of the module has a slant with respect to the flat reference surface of a valgus block. The module slidably connects to the block. The valgus block, referencing guide and a stylus (for connecting the valgus block and cutting together) are removed as a unit before shaping of the distal femur. An indexing system includes a gauge having a series of openings corresponding to 'anterior' referencing and to 'posterior' referencing. During anterior referencing, the gauge allows the surgeon to select the next smaller size prosthesis if the size falls in between available sizes. In posterior referencing, the gauge allows the surgeon to select the next larger size prosthesis if the gauge measures a size that falls in between available sizes.
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