Pedicle screw with large-diameter bone thread
US10335217B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 10, 2017 |
| Grant date | Jul 2, 2019 |
| Priority date | — |
| Expiry date | May 10, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/8625
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pedicle screw system includes a receiving sleeve for a longitudinal support, a bone screw and a shank head element. The bone screw has a bone thread configured as an outer thread and a connection thread configured as an inner thread. The shank head element has at the proximal end a head on which the receiving sleeve is mounted and, at the distal end, a connection thread configured as an outer thread screwed into the connection thread of the bone screw. The connection threads are configured as multi-threads, each with a distal connection thread portion and a proximal connection thread portion. The distal connection thread portion and the proximal connection thread portion have an identical thread pitch. The distal connection thread portion has a smaller diameter than the proximal connection thread portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.