Guide for femoral milling instrumention for use in total knee arthroplasty

• US 5,860,981 A
• Filed: 05/29/1997
• Issued: 01/19/1999
• Est. Priority Date: 07/06/1993
• Status: Expired due to Term

• Current Assignee: Zimmer Technology Incorporated (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Dennis W. Burke, Zimmer Incorporated (Zimmer Biomet Holdings, Inc.)
• Inventors: Dietz, Terry L., O'Connor, Daniel, Bertin, Kim C., Vanlaningham, Richard D., Stalcup, Gregory C., Bays, Rodney, Burke, Dennis W.
• Primary Examiner(s): Coggins, Wynn Wood
• Assistant Examiner(s): Finkel, Sharon
• Application Number:
  US08/864,792
• Time in Patent Office: 600 Days
• Field of Search: 606/80, 606/82, 606/86, 606/87, 606/96, 606/98, 606/79, 606/89, 433/75, 433/76, 7/150, 7/163, 30/374, 30/375, 83/563, 83/609, 83/619, 83/743-745, 83/829, 33/403, 33/425, 33/427, 33/464, 33/470, 33/473, 33/323, 434/164, 392/390, 392/392, 604/20, 604/22
• US Class Current: 606/89
• CPC Class Codes: A61B 17/155 Cutting femur
• CPC Class Codes: A61B 17/1675 for the knee
• CPC Class Codes: A61B 17/17 Guides or aligning means for drills , mills, pins or wires
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 2017/1602 Mills

Abstract

The milling instrumentation of this invention provides a milling guide connected to the femur for accommodating a milling device. The milling instrumentation includes an alignment guide which is used by the surgeon to set a femoral bracket or base on the medial and lateral sides of the exposed femur adjacent its distal end. Once the brackets are set, the alignment guide is removed and a milling guide is connected to the bases. The milling guide establishes a series of reference planes each including a slot. A powered milling device having a burr connected thereto is guided by the slots along the reference planes to accurately mill away a portion of the bone. The milling device includes a bobbin-shaped tip which positively engages the slots to ensure that the milling device is held substantially perpendicular to the reference planes of the milling guide. If necessary, other instrumentation may be connected to the femoral bases which would form a common connection point for the additional instruments thereby ensuring alignment between the various instruments. Optionally, a one piece cutting guide may be connected to the bases to allow resection of the bone by a standard oscillating saw blade. The cutting guide includes a plurality of slots such that all the cuts required for the femur can be made with one cutting guide without reorienting the guide.

Claims

1. A milling guide for forming a notch in a bone including a body forming a frame having an open area positionable about a portion of the bone and a slidable guide slidably carried by the frame, the slidable guide including a slot for accommodating a milling device to guide the milling device along the bone for formation of a notch, the slidable guide further including a slot extending generally transverse to the first mentioned slot, the second mentioned slot being configured to accommodate a saw blade for resection of a part of the bone.

2. A milling guide for forming a notch in a bone, the milling guide comprising a body which forms a frame positionable about a portion of the bone, the frame including a pair of side walls interconnected by a rod, the frame defining an open area between the side walls and rod, further comprising a slidable guide carried by said rod and shiftable along said rod between the pair of side walls, the slidable guide including a slot extending generally transverse to the rod, the slot being configured to accommodate a milling device to guide the milling device along the slot to form a notch in the bone, the slidable guide further including at least one other slot extending generally transverse to the first mentioned slot, the second slot being configured to accommodate a saw blade for the resection of a portion of the bone.