Surgical milling instrument for shaping a bone cavity
AssigneeMedicine Lodge, Inc.
InventorsT. Wade Fallin, Daniel E. Gerbec, John R. Pepper
Life of this patent
Estimating the term…
Abstract
A mill guide instrument for guiding a tissue cutting tool is provided that is made up of subassemblies of a guide body and a mill guide. The guide body has a distal section dimensioned to fit into a bore in bone and a removable template with a guide surface unique to a proposed cavity shape. The mill guide is connected to the guide body and provides for controlled relative motion between the mill and the guide body. The mill guide has an attached stylus that follows the guide surface of the template. The stylus follows the template guide surface so as to constrain the path of the mill to a preferred milling path.
Claims21
A mill guide instrument for guiding a tissue cutting mill, the mill guide instrument comprising:
- a guide body comprising a distal section adapted to fit into a bore in a bone and a template section having a guide surface;
- and
- a mill guide selectively mounted on the guide body and adapted to engage the tissue cutting mill, the mill guide comprising a stylus configured to selectively follow the guide surface of the template such that the mill guide orients the tissue cutting mill towards tissue to be removed from the bone to form a bone cavity.
A mill guide instrument for cutting a cavity in bone comprising:
- a guide body comprising a distal section dimensioned to fit into a bore in a bone and a template section having a guide surface;
- a mill guide being rotationally connected to the guide body, the mill guide comprising a stylus and a sleeve;
- a mill being slidably received within the sleeve, the mill having a proximal section, distal section and a shaft extending therebetween, the mill being oriented toward tissue to be removed when the stylus selectively follows the guide surface of the template section.
A method of using a mill guiding instrument for guiding a tissue cutting tool, the method comprising:
- inserting a guide body into a bore in a bone;
- attaching a template section with a guide surface to the guide body;
- attaching a mill guide with a stylus to the guide body;
- activating the mill with a cutting tip positioned to remove bone tissue;
- and
- following the guide surface of the template section with the stylus until the cavity is prepared to accept prosthesis.
A mill guiding instrument for cutting a cavity in bone, comprising:
- a support frame having a distal portion adapted to be received within a in the bone;
- a mill guide connected to the support frame and having a stylus;
- a mill adapted to cut tissue and adapted to rotate within the mill guide;
- a template connected to the support frame and having a guide surface comprised of a three dimensional surface, tracing the template with the stylus causing the mill guide to position the mill such that a desired cavity is cut into the bone.
21 A mill guide instrument for cutting a cavity in bone as in claim 20 wherein the template section is removably connected to the guide frame.
Dependencies are inferred from the claim text.