Tool
US4875855A · kind A · utility
Inventor
Key dates
| Filing date | Nov 23, 1987 |
| Grant date | Oct 24, 1989 |
| Priority date | — |
| Expiry date | Nov 23, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C7/02
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An orthodontic instrument for tightening a loop in a dental ligature about an anchor affixed to a tooth, to tie an archwire to the anchor, comprises a shaft having at one end a nose for bracing the tool against the wires and bracket; a movable ligature carriage on the shaft; and means on the carriage to hold a dental ligature to the carriage with a loop in the ligature projecting around and beyond the nose of the shaft. The ligature carriage is movable along the shaft to draw the ligature loop towards the abutment at the nose of the shaft and tighten the loop before twisting the ligature 180.degree., to seat the archwire in the anchor on the tooth, and then spinning the shaft to twist the wires.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.