Separable pedicle screw

US9358055B2 · kind B2 · utility

Assignee

• TONGJI UNIVERSITY · CN

Inventors

• Liming Cheng · Shanghai, CN
• Yan Yu · Shanghai, CN
• Zhili Zeng · Shanghai, CN
• Wei Xu · Putuo District, CN
• Yongwei Jia · Shanghai, CN
• Lie Qian · Shanghai, CN
• Rui Zhu · Beijing, CN
• Jianjie Wang · Shanghai, CN
• Zhourui Wu · Shanghai, CN

Key dates

• Filing date: May 27, 2014
• Grant date: Jun 7, 2016
• Expiry date: Oct 1, 2034

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2090/037
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Techniques are generally described related to a method and system for treating an injury with a bone screw. One example bone screw may be configured to fracture at a pre-selected frangible location so that the point of failure is not in an inaccessible location, e.g., deeply embedded below the surface of a treated bone. The bone screw may further include a material disposed over the frangible location that is designed to temporarily strengthen the screw and selected to be absorbed by the body over a period of time after installation of the screw in the bone. One example bone screw may include an unthreaded portion that is configured to facilitate removal of an embedded screw fragment from a bone in the event that the screw fails in vivo.