Haptic volumes for reaming during arthroplasty

US9125669B2 · kind B2 · utility

Assignee

• MAKO Surgical Corp. · US

Inventors

• Amar Ranawat · New York, US
• Mark W. Pagnano · Rochester, US
• Lawrence Dorr · Tustin, US
• Richard Jones · Coventry, GB
• Danielle Landeck · Delray Beach, US
• Matt Thompson · Marietta, US
• Radu Iorgulescu · Boca Raton, US
• Renen Bassik · Brookline, US
• Daniel Odermatt · Fort Lauderdale, US

Key dates

• Filing date: Jun 30, 2011
• Grant date: Sep 8, 2015
• Expiry date: Dec 11, 2032

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B34/76
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A haptic robotic system for reaming an acetabulum prior to inserting an acetabular cup is more accurate than conventional instruments and may reduce the risk of dislocation and improve durability of a hip implant. Disclosed is a three-dimensional tool path, referred to as a haptic volume. Once the haptic volume is implemented into the software of a haptically constrained surgical robotic system, the cutting tool or reamer can only be utilized within the haptic volume. The haptic volume guides the surgeon in preparing the final reamed bone surface with a greatly reduced chance of the reaming unintended bone and greatly increases the chance that the reaming procedure may be carried out using one reaming tool, or using a single-stage reaming process.