Cold process for hydroxyapatite coatings
US5458863A · kind A · utility
Inventor
Key dates
| Filing date | Nov 25, 1994 |
| Grant date | Oct 17, 1995 |
| Priority date | — |
| Expiry date | Nov 25, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00796
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention is a method, involving temperatures between room temperature and 100.degree. C., for coating a metal substrate with hydroxyapatite. The intended application is coating porous metal coats of orthopedic and endosseous implants such that the underlying metal is not sintered and the hydroxyapatite coating has chemical and physical properties that are close to biological apatite. The method involves: (i) cleaning the metal substrate, (ii) coating the metal substrate with brushite by electrodeposition at room temperature, (iii) dislodging bubbles periodically during brushite electrodeposition, and (iv) converting the brushite coating to hydroxyapatite at a temperature between room temperature and 100.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.