Polyaxial bone screw with shank articulation pressure insert and method
US7776067B2 · kind B2 · utility
219Cited by
90References
22Claims
0Family size
Inventor
Key dates
| Filing date | May 27, 2005 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Nov 21, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B35/005
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A polyaxial bone screw assembly includes a threaded shank body having an upper portion, a receiver member or head, a retaining and articulating structure, and a pressure insert disposed between the shank upper portion and a rod. The receiver has a U-shaped cradle defining a channel for receiving a spinal fixation rod and a receiver cavity. The retaining and articulating structure attaches to the shank and rotates with the shank in the cavity during positioning. The pressure insert presses upon the shank upper portion and not the retaining and articulating structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.