Minimally invasive bone miller apparatus

US7942879B2 · kind B2 · utility

Assignee

• DePuy Products, Inc. · US

Inventors

• Michael J. Christie · Columbus, US
• David K. DeBoer · Nashville, US
• Michael C. Jones · North Webster, US
• Steven Wayne Smith · Fort Wayne, US
• Brad Parker · Warsaw, US
• Charles W. Jaggers · Mansfield, US
• Derek A. Shrack · Leesburg, US
• James Rogers · Rancho Cucamonga, US

Key dates

• Filing date: Jul 26, 2010
• Grant date: May 17, 2011
• Expiry date: Jul 26, 2030

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2/367
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A milling system is disclosed for creating a cavity in a bone. The cavity has a cross section which has a generally triangular profile having a first side generally parallel with an axis of the bone and a second side forming an acute angle with the first side. The cavity is contiguous with a pre-existing conical cavity in the bone. The system comprises a drive shaft, a frame for carrying a cutter and a cutter for cutting the cavity. The drive shaft has a proximal end configured for coupling to a drive means and a distal end configured to form a portion of a drive joint for coupling the drive shaft to a cutter. The frame includes a shaft and a cutter mount for mounting a cutter at a first angle approximating the acute angle with respect to the shaft. The mount includes a bracket extending laterally from the shaft to a bearing configured to receive a portion of a cutter and maintain the received cutter oriented at the first angle during rotation. The cutter has a head configured to form a portion of a drive joint for coupling the cutter to a drive shaft. The drive shaft is coupled to the cutter to form the drive joint. The cutter is received in the mount at the first angle and the dr…