Expandable screw and methods of use
US9681905B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 2013 |
| Grant date | Jun 20, 2017 |
| Priority date | — |
| Expiry date | Oct 10, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/8655
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An expandable screw includes generally a shaft, a head, and a cut pattern. The shaft includes a longitudinal axis, an outer surface including a thread to engage bone, and an expandable region configurable between a first state with a first radius measured from the longitudinal axis to the outer surface and a second state having a second radius measured from the longitudinal axis to the outer surface. The head coupled with the shaft at a neck is configured to receive a driving instrument to insert and drive the shaft into the bone when the expandable region is in the first state. The cut pattern on the shaft permits at least partial nesting of a first portion of the expandable region within a second portion of the expandable region in the second state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.