Method and surgical navigation system for creating a recess to receive an acetabulum

US7996061B2 · kind B2 · utility

Assignee

• Aesculap AG · DE

Inventors

• Benoit Mollard · Échirolles, FR
• Francois Leitner · Saint-Martin-d'Hères, FR
• Sergej Kammerzell · Munich, DE
• Dirk Friedrich · Munich, DE

Key dates

• Filing date: Dec 12, 2007
• Grant date: Aug 9, 2011
• Expiry date: Apr 14, 2030

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2034/2068
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A system and method for creating a cavity to receive an acetabulum in a pelvic bone with the aid of a navigated tool are provided. A tear-drop point on a pelvic bone is located by means of a scanning instrument. A tear-drop plane is determined from position data of the tear-drop point and the plane of the pelvic inlet. The tear-drop plane lies perpendicular to the plane of the pelvic inlet, extends parallel to a line connecting the two anterior superior iliac spines, and runs through the tear-drop point. A reference point is determined which is at a defined height above the tear-drop plane, in a defined position in an anterior-posterior direction, and at a defined spacing from an outer surface of the pelvic bone in a lateral-medial direction. A tool is worked into the pelvic bone in a desired direction relative to the reference point.