Proximal body milling apparatus

Details Proximal body milling apparatus Proximal body milling apparatus

1994-06-20

1996-03-05

Graysay, Tamara L.

Surgery

Instruments

Orthopedic instrumentation

409179, 409201, 82 15, 606 89, A61B 1716, A61B 1717

Patent

active

054963249

ABSTRACT:
A milling apparatus 2 including an articulated cutter 20 and an inverted L-shaped frame 10 for removing a unique geometric volume of bone to receive a prosthetic implant stem. Cutter 20 is housed within frame 10 for rotational movement about its longitudinal axis and lateral movement along a guide 16, which extends laterally from frame 10. Cutter 20 includes a pair of articulated arms 30, 32 each carrying a plurality of cutting blades 40. The proximal end 22 of cutter 20 is seated in an elongated non-radial race 17 formed in guide 16. Articulated arms 30, 32 provide a "scissoring" action which allows cutter 20 to be compressed longitudinally when shifted to one end of race 17 and extended longitudinally when shifted to the opposite end of race 17. The scissoring action of arms 30, 32 also changes the angle of the cutting face of blades 40 carried by arms 30, 32. Consequently, milling apparatus 2 creates a receiving cavity having an egg-shaped cross section.

REFERENCES:
patent: 5342366 (1984-08-01), Whiteside et al.
patent: 5417695 (1995-05-01), Axelson, Jr.

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