Bone plate system and methods

US7909859B2 · kind B2 · utility

Assignee

• Pioneer Surgical Technology, Inc. · US

Inventors

• Lawrence Mosca · Marquette, US
• Matthew P. Gephart · Marquette, US
• Brian Patrick Janowski · Marquette, US
• Brad Fredin · Negaunee, US
• Francis J. Korhonen · Negaunee, US
• Matthew N. Songer · Marquette, US

Key dates

• Filing date: Oct 26, 2005
• Grant date: Mar 22, 2011
• Expiry date: Sep 3, 2029

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2090/061
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Bone plate systems and retainers are provided for surgical implants and bone repair. The bone plate is multi-tiered for receiving bone anchors or screws for securing multiple bones or bone fragments in a desired relationship. The plate includes bores for receiving the screws, and the bores may permit and define a translation path for the screws relative to the plate. The retainers are held in a recess in the bores to prevent screw back-out. Once the screw is seated with the plate, the retainer rests over a top surface of the screw to impede screw back-out from the plate. The retainer may expand to permit driving a screw therethrough and may contract once the screw is seated within the plate so the retainer is in a configuration for preventing back-out. Tools and methods are also provided for implantation and removal of the plates and the screws.