バイオセラミックスの開発と応用

Development of Osseointegrative Ceramic Coatings Based on ZPTA—Mechanical Characterization and Influence on the Substrate

Abstract

B. Theelke, Mi. Kuntz, M. Zipperle, S. Eichhorn, T. Boxleitner, T. Pandorf and R. Burgkart

In this article, the mechanical characterization of a monolithic cup made of BIOLOXdelta with a porous ceramic coating for osseointegration is presented. During the coating process, a ceramic slurry is deposited on a green substrate, both slurry and substrate are based on BIOLOXdelta. To achieve a porous coating, organic pore-forming agents were used which are pyrolized in the following sintering process. Porosities of 18 to 47% could be reached depending on the layer thickness. Extensive mechanical investigations were applied on the fabricated cups to verify the suitability of the produced porous layers for biomechanical demands of the interface between bone and dense substrate. The test results showed that coated ceramic cups require comparable push out forces for the disconnection from artificial bone to established metal shells with plasma sprayed titanium coatings.