Dowel pin locator assembly and method of making positive dental models with removable dies
US4459110A · kind A · utility
Inventor
Key dates
| Filing date | Feb 15, 1983 |
| Grant date | Jul 10, 1984 |
| Priority date | — |
| Expiry date | Feb 15, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C9/002
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A dowel pin locator assembly comprising a U-shaped base member having a race and anchoring members is placed so that the anchoring members are imbedded in the dental stone poured into the negative impression of a conventional impression tray. The race is left exposed, and after the dental stone has set, the positive model formed by the dental stone is separated from the negative impression. The race provides a snug fit with the head of a dowel pin, which is slideably positioned into the race so as to be in proper position for the ground-down tooth, requiring restoration. The head of the dowel pin cover is then bonded to the floor of the race and to the walls. The dowel pin projects upwardly through a slot in the race and is fitted with a dowel pin shank cover containing a central bore through which the shank projects. A full arch cover fits over the race member and the walls of the full race cover provides a snug fit for the dowel shank cover which is then locked into position by means of clips. Thereafter, the appropriate portions of the positive model are marked and the sections are sawed out through the slot portion of the U-shaped base member, so that the segment of the positiv…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.