Endodontic filling and sealing composition
US4449938A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1982 |
| Grant date | May 22, 1984 |
| Priority date | — |
| Expiry date | Feb 19, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S528/901
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A biologically compatible non-toxic composition which when mixed, is useful as an in situ curing endodonic filling material. The composition has two separately packaged components. One component is a paste which contains a low viscosity hydroxy terminated polydialkylsiloxane and a non-reactive silicone oil diluent having a viscosity of from about 20 to 20,000 centistrokes at 25.degree. C. and comprising a polydialkylsiloxane. The other component is a liquid which includes (i) the reaction product resulting from the refluxing at ambient pressure and a temperature of about 150.degree. to about 175.degree. C. under a nitrogen blanket in the absence of air and moisture a dialkyltindicarboxylate in which the alkyl groups have from 1 to about 8 carbon atoms and the carboxylate groups contain from about 10 to about 18 carbon atoms and a tetraalkyl orthosilicate, in the molar ratio of 1 to 3; (ii) uncombined alkyl orthosilicate and (iii) a non-reactive silicone oil diluent having a viscosity of from 20 to 120,000 centistrokes at 25.degree. C. and comprising a polydialkylsiloxane. The method of treating a root canal in need of endodontic filling which comprises the steps of forming a mixtur…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.