Many would imagine biomedical tribology is limited to replacement joints, however, this is not the case. Research has long been conducted to develop and improve the tribosystems found in a whole range of biomedical appliances, not only replacement joints but also contact lenses, medicines and dental implants to name a few. PCS’ instruments are used by researchers around the world to help push this work forward to make advancements that can change people’s lives for the better.
Tribology plays an important role in the development of medicines. This is primarily in how medicines are delivered into the body, with lots of work going on that is focussed on how smoothly both solid and liquid medicines can travel down the oesophagus, and whether they coat it as they do or slide straight through. For contact lenses, the importance of tribology is even more obvious. The interfaces between a contact lens and an eye ball, and the contact lens and an eye lid are what dictate the wearers comfort. Without in depth research and investigation of these interfaces, people could be left with uncomfortable or even dangerous lenses.
For replacement joints tribological research is vital for understanding how effective materials and coatings will be when in situ. For example a lot of research is being conducted on replacement synovial joints. These joints (e.g. knee and hip joints) are continuously transmitting large dynamic loads whilst accommodating a wide range of movements. Due to trauma and diseases, such as osteoarthritis, these joints occasionally need to be replaced by artificial implants. Tribology research considers the friction, wear and lubrication of natural and artificial joints including the wear debris from the joint implants and the human body’s reaction to this.