Dental bleaching compositions with high concentrations of hydrogen peroxide
US5858332A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 1997 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | Jan 10, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/51
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Dental bleaching compositions that include a high concentration of bleaching agent and a bleaching agent stabilizer that maintains the potency of the bleaching agent over time. The dental bleaching compositions of the present invention may be one-part, pre-mixed compositions that do not require mixing at the time of treating a patient's teeth but which remain stable over time. The bleaching agent may consist of hydrogen peroxide, either in aqueous form or complexed with urea (carbamide peroxide) or sodium perborate. The bleaching agent stabilizer includes an impurity scavenger that binds or ties up impurities, such as errant or residual metal ions, that can cause decomposition of the bleaching agent. The bleaching agent stabilizer may include a carboxylic acid chelator or a tin salt. The bleaching composition may include a thickening agent to achieve a selected viscosity and a neutralizing agent to adjust the pH and a carrier to help provide selected consistency and potency. The dental bleaching compositions may be adapted to be loaded into and delivered from a syringe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.