Bone cement composistion containing microencapsulated radiopacifier and method of making same
US5795922A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1995 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Jun 6, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2989
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A radiopaque bone cement used to repair bone or other hard tissues is provided. The bone cement is made from combining a composition containing an acrylic powder and a radiopacifier with a corresponding liquid monomer. Prior to being added to the composition, the radiopacifier is microencapsulated with a bone cement compatible material. When combined with the liquid monomer, the bone cement compatible material dissolves releasing the radiopacifier particles into a bone cement matrix. By being microencapsulated, the radiopacifier is prevented from agglomerating in the cement. Instead, the radiopacifier particles become dispersed throughout the bone cement matrix which not only creates a radiopaque cement but also increases the fatigue life of the cement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.