Porous bone screw
US8979911B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 13, 2010 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Nov 17, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/561
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A bone screw is described which includes a one-piece threaded screw body composed at least partially of a rigid foam. The screw body is headless and includes a bore extending therethrough to define a cannula and thereby providing the screw body with an annular shape defining a radial wall thickness. At least a central portion of the screw body is formed of the rigid foam which defines a matrix having a plurality of inter-connected pores therein. The inter-connected pores are disposed throughout the complete radial wall thickness of the screw body from an outer surface of the screw body to an inner surface thereof within the cannula, such as to permit bone in-growth through the complete radial wall thickness of the annular screw body. The inter-connected pores and the cannula thereby respectively allow bone in-growth through the complete radial wall thickness and the full axial length of the screw body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.