Enhanced visibility materials for implantation in hard tissue
US6309420A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1997 |
| Grant date | Oct 30, 2001 |
| Priority date | — |
| Expiry date | Oct 14, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00353
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An enhanced visibility composition for implantation from a remote source, so that the composition can be readily observed under fluoroscopy or other imaging techniques. The composition include a biocompatible matrix, such as a hard tissue implant material for example, and radiopaque particles mixed in the matrix. The radiopaque particles have a particle size between about 120.mu. and 2200.mu., more preferably about 350.mu. and 2200.mu., even more preferably between about 450.mu. and 1600.mu., and most preferably between about 570.mu. and 1150.mu.. Preferably the hard tissue implant and the radiopaque particles are formed or prepared in a slurry. Optionally, the enhanced visibility composition may further include additional radiopaque particles or contrast particles mixed in with the composition, which have a particle size between about 120.mu. and 350.mu., preferably between about 120.mu. and 250.mu..
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.