Orthodontic appliance
US4090299A · kind A · utility
Inventor
Key dates
| Filing date | Apr 25, 1977 |
| Grant date | May 23, 1978 |
| Priority date | — |
| Expiry date | Apr 25, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C7/10
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An orthodontic appliance having an arcuate labial bar shaped to generally conform to the outer surface of a row of teeth and an arcuate lingual bar shaped for positioning on the inner surface of the same row of teeth. The two bars are held together and serve to urge the teeth located between the bars into a desired arcuate shape. Screw means are disclosed for attaching the labial and lingual bars and tapered screw means may be used whereby the further insertion of a tapered screw will tend to urge a tooth either away from or toward the center line of the jaw. The labial and lingual bars may be affixed to a collar or cap which may be attached to a molar or other tooth. A channel affixed to the lingual bar is disclosed whereby the nut for any screw may be held out of direct contact with the user's tongue. The labial and lingual bars may be attached by ratchet means located near the extremity of each bar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.