Endodontic instrument having notched cutting surfaces
US6966774B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2002 |
| Grant date | Nov 22, 2005 |
| Priority date | — |
| Expiry date | Aug 15, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C5/42
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A fluteless endodontic file is provided, formed from a tapered shaft of material having a prismatic shape generally defined by three or more side surfaces and three or more interposed corners. A plurality of notches are cut into one or more corners defining cutting surfaces, points and/or edges. The notched cutting surfaces are formed such that the file, when rotated and/or reciprocated within a root canal, effectively cuts/debrides hard tissue (known in the art as dentin) as well as soft tissue, thus, forming an optimal canal shape. The cutting surfaces are also preferably formed at an angle to the centerline of the instrument to provide optimal cutting efficiency and material removal. The fluteless file design exhibits increased efficacy, with less tendency to bind and break within the root canal and also significantly reduces manufacturing and capital equipment costs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.