SURFACE ANALYSIS OF A TITANIUM PLATE IMPLANT USED FOR HUMERUS FRACTURE AFTER MECHANICAL TESTING

Mihai Alexandru CORDUNIANU, Iuliana CORNESCHI, Ana Iulia BIȚA, Robert CIOCOIU, Alina ROBU, Iulian ANTONIAC, Cătălin Ionel ENACHESCU

Abstract


In clinical practice, proximal humeral fractures are a frequent fracture type. The purpose of this study was to test mechanically and evaluate the surface properties for an anodized titanium bone plate by simulating an assembly that reproduces the fracture fixation of a humeral defect. The experimental assembly was comprised of an artificial bone in which a defect was created by removing a bone region. The defect was remediated using a bone plate. The assembly was tested in compression in order to analyze the mechanical behavior. During compression testing, the bone plate was stressed in bending, the anodized layer on the surface failed and the stressed regions became obvious. The roughness and wettability of the bone plate surface was tested prior and post mechanical testing. We found that the surface properties of the bone plate were modified after mechanical testing. This change in surface morphology plays an important role in the implant - tissue interaction, as surface wetting and surface free energy are greatly influenced by the mechanical forces that act on the implant after surgical procedure.

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References


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