Bone tumours are all too frequently some of the most difficult conditions faced by orthopaedic surgeons.  Though relatively uncommon in the whole population, these tumours tend to strike young children and adults.  Without radical surgery these conditions can progress very rapidly, often with fatal consequences.

Custom-made implants
Implant pioneers Stanmore Implants Worldwide Ltd, (SIW); based on the Royal National Orthopaedic Hospital campus in Stanmore, Middlesex, is  a world leader in supplying the custom-made implants to replace bone removed in bone tumour surgery. 

Fast design process
Stanmore Implants has developed very fast methods of creating designs for implants directly from X-rays and CT scans, manufacturing implants and delivering them for surgeons to replace bone sections. SIW can achieve very rapid turnaround times, often within four days, and sometimes overnight for urgent critical cases.

Biomedical  integrity
While a variety of materials are used for implants, the most common material to replace bone structures is a titanium aluminium vanadium alloy.  Tecvac provides some of SIW's titanium alloy implants with a titanium nitride coating to help ensure the mechanical, biocompatible and cosmetic integrity of the implants.  While SIW provides around 900 custom-made devices every year, titanium nitride is normally only applied to the proximal tibial replacements, where it is particularly important to avoid tissue staining and have smooth interaction with surrounding tissue  due to the close proximity of the tibia to the skin surface.

Diamond-like  carbon coatings (DLC)
Tecvac has developed high integrity DLC coatings especially for knee and hip implants and other orthopaedic applications.

See  the latest datasheet at www.cmprnews.co.uk/dlccompatibility.pdf

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Reduced wear & infection
A new coating developed by Tecvac including silver and chromium nitride has the potential to reduce both wear and joint infection in total hip replacement therapy.
See poster from Queen Mary College, University of London
Project BERTI; (Biomedical implant with Exceptional Resistance to Tribo-bio-corrosion and with Inherent antimicrobial properties) is expected to lead to new designs of  knee and hip implants and  substantially reduce the number of costly revision surgeries for hip and knee replacement patients. Partners in the project include Corin Plc, Tecvac Ltd, Imperial College, University of London, Charing Cross Hospitals, Queen Mary College, University of London and the University of Sheffield.
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Page update January 2013
SMART-HIP, a research project led by Cambridge coating specialist Tecvac Ltd and leading UK hip prosthesis manufacturer, Corin Ltd, has demonstrated the potential of new enhanced wear resistant coatings to increase implant longevity in Metal-on-Metal (MoM) hip prostheses and future potential applications to trunnions and tapers to prevent fretting and corrosion.

New PVD silver bearing coatings were developed which may protect against post-operative infection, and also provide a barrier to minimise metal ion release. Optimised coatings reduced the release of one important metal ion (Cobalt), implicated in chronic tissue inflammation, by 99%.

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£500,000 EPSRC project at the University of Sheffield

Tecvac Ltd has designed and built a unique, world class surface engineering research machine for The University of Sheffield as part of a £500,000 EPSRC project.

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