Med-Tech Innovation Materials
New Materials for ORTHOPAEDICS
Utilising the concept of micro fracture mechanics new toughened ceramics and ceramic polymer hybrids are being developed. Dr Xiang Zhang, Archana Binod-Nair and Mike Salt of CERAM describe this approach and the benefits offered by these materials.
W 20 ¦ April 2011
e have all learnt lessons from adverse incidents associated with orthopaedic medical devices. In general, there are three root causes that contribute to these events: the choice and development of materials, the design of the device, and manufacturing-related issues. Based on the concept of micro fracture mechanics, this article discusses the critical elements associated with the design and development of innovative orthopaedic materials to reduce these incidents and minimise cost.
Man-made materials have been used for orthopaedics since the first metallic hip replacement surgery was performed in 1940. Technology has advanced and matured since then, yet still incidents occur from time to time. Unfortunately, almost all these are associated with the materials or the design of the materials; an example of this is the recent Depuy recalls of its ASR XL hip implants.1
One major problem identified here
was the debris generated from the metal-on-metal (MOM) components grinding against each other. Issues
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