Device for fixation of bone fractures
US8556947B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2007 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Jun 29, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/8655
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device and method for fixation of bone fractures has a bone screw comprising a shank with a threaded end portion, on the outer surface. The screw has a through bore with two bore portions differing in diameter. A step in the diameter is formed between these bore portions and is located within the end of the screw having the thread. This step in diameter can support a metal insert which in turn supports a polymer pin when the latter if pressurized with a sonotrode in the bone screw. Together with an applied ultrasonic vibration the pressure fluidizes the polymer pin and presses the material through holes configured in the wall of the bone screw and into surrounding bone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.