Translucent wear resistant dental enamel material and method
US6262142A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1999 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Jul 12, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C2202/01
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method and material for forming translucent wear resistant dental enamel and the dental enamel material formed which has an opacity less than 50 percent and a localized wear volume loss of less than 0.025 mm.sup.3. The dental enamel material is formed from a polymerizable matrix and a filler. The material for forming translucent wear resistant dental enamel having an opacity less than 50 percent, a localized wear volume loss of less than 0.025 mm.sup.3 and a localized extended wear volume loss of less than 0.04 mm.sup.3, comprises a polymerizable matrix forming liquid and inorganic filler particles. The liquid comprises polymerizable material having a first refractive index. The filler comprising a first plurality of particles having a second refractive index. The first plurality of particles being formed from a low and a high median particle size plurality of particles. The low median particle size plurality of particles having a median particle size between 0.1 and 1.0 micrometers. The high median particle size plurality of particles having a median particle size between 1 and 10 micrometers. The first refractive index being within 5 percent of said second refractive index. Mor…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.