Easily implantable and stable nail-fastener for skeletal fixation and method
US8287540B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2010 |
| Grant date | Oct 16, 2012 |
| Priority date | — |
| Expiry date | Dec 13, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/7241
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An intramedullary nail (20) for insertion into the medullary canal (26) in a bone (24) surrounded by the cortex (28) and defines a bore (34) extending transverse to the intramedullary nail (20). A threaded fastener (22) extends along a fastener axis (A) and has a compression portion (48) having a compression portion diameter (DCP), and a threaded portion (50) having a threaded portion diameter (DTP) extending through a near cortex hole (40) and a far cortex hole (42), both holes (40, 42) radially overlapping the bore (34) and the threaded portion diameter (DTP) threadedly engaging the bore (34). A compression transmission device (54) has an exterior (56) and an interior (58) and defines an interior space for transmitting the compressional load of the threaded fastener (22) to the intramedullary nail (20). The threaded fastener (22) extends through the compression transmission device (54) and the intramedullary nail (20) and the far cortex hole (42) for threadedly engaging the bore (34) and fixating the intramedullary nail (20) within the medullary canal (26). The interior space of the compression transmission device (54) is greater than the compression portion diameter (DCP) of the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.