System for fabrication of indirect dental restoratives
US6386865B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1999 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Aug 10, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C13/0003
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A process for the fabrication of indirect dental restoratives includes the making of a first, pre-operative impression of a tooth to be restored using a first polyvinyl silicone (PVS) material disposed in a clear tray, followed by the preparation of the tooth. A second, final post-operative impression of the tooth is taken utilizing a second PVS material. A tooth model is then made by pouring a low viscosity and suitably rigid, third PVS material into the final impression. Prior to the complete setting of the low viscosity PVS material, a higher viscosity, fourth PVS material is applied onto the model PVS material to form a completed model with base. The model is then fitted into the pre-operative impression matrix made from the first PVS material. Layers of composite are packed onto the impression in the clear matrix. The model (with attached base) is then inserted into the composite disposed in the first PVS material and the resulting matrix is placed in a single apparatus for conducting both light and heat cure of the dental composite. The apparatus can utilize a thermister disposed in a composite material, the thermister/composite assembly being disposed in a curing chamber of …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.