Vibratory mill and method of use for low contamination grinding
US6098906A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 14, 1999 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | May 14, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C17/14
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides a vibratory mill for grinding dental filler having a grinding chamber, preferably coated with an abrasion resistant polymer, the grinding chamber being charged with glass beads having a diameter in the range of about 0.1 mm to about 10.00 mm, and a refractive index substantially matching that of the dental filler to be ground. There is further provided a method of using this mill and media to provide substantially pure ground particles having an average particle size less than the average wavelength of visible light that, when incorporated into a dental restorative composite, impart good optical properties to the cured material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.