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Mechanism and strength of bonding between two bioactive ceramics in vivo

Mechanism and strength of bonding between two bioactive ceramics in vivo A study was conducted to examine the mechanism and strength of bonding between two bioactive ceramic plates in vivo. Rectangular plates (15 mm × 10 mm × 2 mm) of Bioglass®, apatitewollastonite‐containing glass ceramic (designated A‐W · GC), and two types of hydroxyapatite sintered a t 900° and 1200° (designated HA900 and HA1200) were prepared. Two plates of the same materials tied together with silk thread were implanted subcutaneously into rats. The force required to detach the mutually bonded bioactive ceramic plates was measured 4, 8,12, and 24 weeks after implantation. The interface between the two bonded plates was examined by SEMEPMA and thin‐film x‐ray diffraction analysis. At 24 weeks after implantation, 1991 the mutual bonding of Bioglassm and A‐W · GC was stronger than that of the two HA types. SEM‐EPMA and thin‐film x‐ray diffraction analysis of the bonded area of Bioglassm and A‐W · GC plates showed bonding zones with a patiteinthe margins, and a bonding zone with calcite in the center. The greater strength of bonding of Bioglassm and A‐W · GC plates compared with the two types of HA plate 24 weeks after implantation is explained by the wider bonding zone provided by the calcite layer formed in the center of the plates, which is considered to have been perfused with P04‐poor body fluids resulting from PO4 consumption for apatite formation in the margins. © 1992 John Wiley & Sons, Inc. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Biomedical Materials Research Part A Wiley

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References (16)

Publisher
Wiley
Copyright
Copyright © 1992 Wiley Subscription Services, Inc., A Wiley Company
ISSN
1549-3296
eISSN
1552-4965
DOI
10.1002/jbm.820261005
pmid
1331113
Publisher site
See Article on Publisher Site

Abstract

A study was conducted to examine the mechanism and strength of bonding between two bioactive ceramic plates in vivo. Rectangular plates (15 mm × 10 mm × 2 mm) of Bioglass®, apatitewollastonite‐containing glass ceramic (designated A‐W · GC), and two types of hydroxyapatite sintered a t 900° and 1200° (designated HA900 and HA1200) were prepared. Two plates of the same materials tied together with silk thread were implanted subcutaneously into rats. The force required to detach the mutually bonded bioactive ceramic plates was measured 4, 8,12, and 24 weeks after implantation. The interface between the two bonded plates was examined by SEMEPMA and thin‐film x‐ray diffraction analysis. At 24 weeks after implantation, 1991 the mutual bonding of Bioglassm and A‐W · GC was stronger than that of the two HA types. SEM‐EPMA and thin‐film x‐ray diffraction analysis of the bonded area of Bioglassm and A‐W · GC plates showed bonding zones with a patiteinthe margins, and a bonding zone with calcite in the center. The greater strength of bonding of Bioglassm and A‐W · GC plates compared with the two types of HA plate 24 weeks after implantation is explained by the wider bonding zone provided by the calcite layer formed in the center of the plates, which is considered to have been perfused with P04‐poor body fluids resulting from PO4 consumption for apatite formation in the margins. © 1992 John Wiley & Sons, Inc.

Journal

Journal of Biomedical Materials Research Part AWiley

Published: Oct 1, 1992

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