Advances in tribological testing of artificial joint biomaterials using multidirectional pin-on-disk testers

Advances in tribological testing of artificial joint biomaterials using multidirectional pin-on-disk testers.

The introduction of numerous formulations of Ultra-high molecular weight polyethylene (UHMWPE), which is widely used as a bearing material in orthopedic implants, necessitated screening of bearing couples to identify promising iterations for expensive joint simulations. Pin-on-disk (POD) testers capable of multidirectional sliding can correctly rank formulations of UHMWPE with respect to their ...

The Biotribology of PEEK-on-HXLPE Bearings Is Comparable to Traditional Bearings on a Multidirectional Pin-on-disk Tester

BACKGROUND All-polymer bearings involving polyetheretherketone (PEEK) have been proposed for orthopaedic applications because they may reduce stress shielding, reduce weight of the implants, reduce wear and risk of osteolysis, and prevent release of metal ions by replacing the metal articulating components. Little is known about the biotribology of all-polymer PEEK bearings, including the effec...

Advances in biomaterials that led to the artificial disc.

Can Pin-on-Disk Testing Be Used to Assess the Wear Performance of Retrieved UHMWPE Components for Total Joint Arthroplasty?

The objective of this study was to assess the suitability of using multidirectional pin-on-disk (POD) testing to characterize wear behavior of retrieved ultrahigh molecular weight polyethylene (UHMWPE). The POD wear behavior of 25 UHMWPE components, retrieved after 10 years in vivo, was compared with 25 that were shelf aged for 10-15 years in their original packaging. Components were gamma ster...

Tribological applications of biomaterials: an overview

Tribological research is the study of lubrication, friction, and wear. Tribology of biomaterials is to study how the materials work and fail. This will help us to produce better biomaterials. Tribology plays a very important role in improving the design and making successful biomaterials for medical purposes. Joints of human body, such as hip, knee, jaw, dental parts etc., all need to consider ...