Methods of use of a bottom mounted pedical screw assembly
US9522020B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2012 |
| Grant date | Dec 20, 2016 |
| Priority date | — |
| Expiry date | Aug 8, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/7032
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A bone screw, which can be a pedicle screw, is generally tulip-shaped. A bore in the bottom of the tulip permits a threaded shaft to be partially inserted into the open interior of the tulip. A seat is formed on the threaded shaft and receives the bottom of the tulip, and prevents the threaded shaft from being inserted too far into the tulip. A saddle is positioned in the interior of the tulip and receives the end of the threaded shaft on one end and can include a trough on its opposite face which can receive a rod that connects together two or more such assemblies. A retaining screw threads into the upper interior surface of the tulip to hold the subcomponents together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.