System for osteosynthesis at the vertebral column, connecting element for such a system and tool for its placement and removal
US5536268A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 16, 1994 |
| Grant date | Jul 16, 1996 |
| Priority date | — |
| Expiry date | Aug 16, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/7004
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention relates to a system for osteosynthesis at the vertebral column, in particular for stabilizing spinal segments including at least one rodlike connecting element (14) and at least two retaining units (12). Each retaining unit can be anchored to a spinal segment with a tuning-fork-shaped head, (15) the two limbs (16, 17) of which delimit an approximately U-shaped receptacle (18) for the connecting element (14) A clamping screw (19) can be screwed into the receptacle (18) to fix the connecting element (14) between the two limbs (16, 17) of the tuning-fork-shaped screw head (15) The floor (22) of the receptacle (18) has a concave shape to correspond to a swivel-bearing element (23) disposed between the floor (22) of the receptacle (18) and the connecting element (14) The element (24) has a bearing surface (24) faces the floor (22) of the receptacle (18) and, has a complementary convex curvature. The bearing surface (24) of the swivel-bearing element (23), facing the floor (22) of the receptacle (18), is dish-shaped, in particular hemispherical. The opposite side (25) of the element, which faces the clamping screw (19) in the assembled state, moreover includes a gro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.