Anterior spinal implant system for vertebral body prosthesis

US5916267A · kind A · utility

Assignees

• Arthit Sitiso · US
• Frank Bailly · US
• John Wagner · US
• Pibul Itiravivong · TH
• Somsak Kuptniratsaikul · TH
• Tawechai Tejapongvorachai · TH
• Prakit Tienboon · TH

Inventor

• Prakit Tienboon · Phra Pradaeng, TH

Key dates

• Filing date: Apr 7, 1997
• Grant date: Jun 29, 1999
• Expiry date: Apr 7, 2017

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2220/0025
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A vertebral body prosthesis is disclosed which is easily implantable intermediate the endplates of upper and lower vertebrae to replace the removed vertebral body and restore stability and normal vertebrae spacing to the spinal column while facilitating the occurrence of bony integration to fuse the aforesaid vertebrae together. A first embodiment, which may be used in the cervical spine and installed from an anterior surgical approach, is a vertebral body T-cage, which is fixed in height, and is for installation intermediate the endplates of two vertebrae located immediately above and below a removed vertebra. A second embodiment, which may be installed using a posterior surgical approach, is a fixed height vertebral body prosthesis for installation intermediate the endplates of vertebrae located immediately above and below a removed vertebra, with the device being affixed using curved mounting plates located on either the left or the right lateral side of the vertebrae. A third embodiment is a variable height vertebral body prosthesis similar to the fixed height vertebral body prosthesis, but which may be adjusted in height once it is installed in place to adjust the spacing betw…