Self-locking bone screw and implant
US7322983B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 7, 2003 |
| Grant date | Jan 29, 2008 |
| Priority date | — |
| Expiry date | Apr 2, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/7059
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An orthopedic implant assembly is presented which has a flange member having a through bore with internal threads and a screw which has a single continuous thread that has a first section and a second section. The cross sectional configuration of the thread in the first section is different than the cross sectional configuration in the second section. The first section defines a cancellous thread while the second section defines a locking .thread which is an asymmetrical buttress thread that has the same pitch and angle along the leading or thrust surface as the cancellous thread and a thicker square spiral edge or face joined to a transverse rear surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.