Instruments for bone screws
US7491203B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2005 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Nov 20, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B17/1617
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An adjustable drill for use in implanting orthopedic screws, such as adjustable compression screws having a separate adjustable head. The adjustable drill comprises a primary drill bit and a countersink drill bit encircling the primary drill bit. The countersink drill bit is configured to selectively slide along the primary drill bit for use in selecting a drill depth. The countersink drill bit is associated with a stop member that is configured to selectively lock the countersink drill bit at one of a plurality of selected positions along the primary drill bit to thereby establish a drill depth. The drill depth corresponds to the size of a selected screw implant, allowing the drill to be used as a trial. The adjustable drill forms a bore having a primary bore and a countersunk entry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.