Alkali-free bioactive sol-gel compositions

Details Alkali-free bioactive sol-gel compositions Alkali-free bioactive sol-gel compositions

1990-05-18

1991-12-24

Lieberman, Paul

Compositions: coating or plastic

Coating or plastic compositions

Dental

423308, 423311, 501 2, 501 5, 501 10, 501 63, 501 72, 501 80, 623 11, 623 16, C09K 300, C01B 1516, C03C 1000, C04B 3800

Patent

active

050749161

ABSTRACT:
Sol-gel processing techniques are used to produce alkali-free bioactive glass compositions based on SiO.sub.2, CaO and P.sub.2 O.sub.5. By varying the SiO.sub.2 content, a range of hydroxyapatite production rates can be obtained; conversely, varying the time of exposure to actual or simulated in vivo solutions permits use of a range of allowable proportions of SiO.sub.2. The sol-gel derived compositions can be chosen to achieve target values for thermal expansion coefficient, elastic modulus and volume electrical resistivity.

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