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US 4,777,942 AGranted
Bone milling instrument
AssigneeSulzer Brothers Limited
InventorsOtto Frey, Kurt Bider
Life of this patent
Estimating the term…
Abstract
The milling instrument has a caliper which is inserted into a medullary cavity and a spindle which is linked to the caliper at an angle. The spindle carries a milling cutter as well as a guide shoe at the distal end which slides within a guideway at the distal end of the caliper. The instrument is able to cut a circular arc corresponding to the boundary line between the spongiosa and cortical tissue in the region of the calcar arc.
Claims13
A bone milling instrument comprising
- a caliper having a distal end for insertion in a medullary cavity of a femur and a longitudinally extending guideway;
- a spindle having a guide shoe at a distal end slidably mounted in said guideway and a milling cutter thereon for milling a curve in an area of a calcar arc of the femur;
- and
- means linking said spindle to said caliper to dispose said spindle angularly relative to said caliper.
1 more element
A bone milling instrument comprising
- a caliper for insertion in a medullary cavity of a femur, said caliper having a longitudinally extending guideway adjacent a distal end;
- and
- a rotatable spindle having a distal end slidably mounted in said guideway and a milling cutter thereon for milling in an area of a calcar arc of the femur.
Dependencies are inferred from the claim text.