| 摘要 |
<p>A novel ceramic form of hydroxylapatite and of a mixture of hydroxyiapatite and whitlockite, dental restorative compositions and dental and surgical phosthetic materials containing said form. The ceramic is prepared by reacting calcium ion with phosphate ion in aqueous medium and at pH of about 10-12 to produce A gelatinous precipitate of a phosphate of calcium, separating said precipitate from solution, and heating said precipitate up to a temperature of at least 1000.degree.C. but below that at which appreciable decomposition of hydroxylapatite occurs for sufficient time to effect the sintering and substantially maximum densification of the resulting product.</p> |
