Spinal fixation
US4763644A · kind A · utility
Inventor
Key dates
| Filing date | Mar 25, 1986 |
| Grant date | Aug 16, 1988 |
| Priority date | — |
| Expiry date | Mar 25, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/037
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A spinal scoliosis fixation implant comprises a plurality of devices which are associated with respective vertebrae and which are interconnected by a single semi-rigid wire, or by a cable with abutment ferrules. Each device may comprise a bone screw or hook with a slotted, externally threaded head into which is inserted the wire or cable and thereon a clamping element which projects slightly from the mouth of the slot, and a nut which is screwed onto the head to press the clamping element onto the wire or cable. The wire or cable can be unclamped, to permit adjustment of the device along the wire or cable, by simply untightening the nut.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.