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Interfacial shear strength and histology of plasma sprayed and sintered hydroxyapatite implants in vivo

Paper ID Volume ID Publish Year Pages File Format Full-Text
14035 1069 1970 6 PDF Available
Title
Interfacial shear strength and histology of plasma sprayed and sintered hydroxyapatite implants in vivo
Abstract

The interfaces of bone with sintered hydroxyapatite (SHA) and plasma sprayed hydroxyapatite-coated (HAC) implants in the femora of six dogs were examined by light microscopy, scanning electron microscopy, energy dispersive X-ray analysis, and push-out tests. The results demonstrated that there was no significant difference at 12 and 24 weeks after insertion between the interfacial shear strengths with bone for the two types of implants, however, the histological characteristics of the bone around the plasma sprayed HA could be distinguished from that of the sintered HA. The HAC implants showed an early surface biodegradation as compared with the SHA implants. The observed differences in the interfacial zones may be attributed to different bone cell activities and variations in the dynamics of bone formation, possibly resulting from a higher level of dissolution/reprecipitation along the plasma sprayed HA surface.

First Page Preview
Interfacial shear strength and histology of plasma sprayed and sintered hydroxyapatite implants in vivo
Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 17, Issue 20, October 1996, Pages 1965-1970
Authors
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering