Experimental techniques to repair focal defects in articular cartilage involve replacing a small area of damaged cartilage with an artificial implant. An important consideration with these devices is the potential for cartilage to wear against the implant surface. To evaluate these implants and to screen for optimal materials and finishes, a method to quickly and accurately predict in vivo cartilage wear is required. Although pin-on-disc wear testers are frequently used to evaluate the wear of engineering materials, and multi-station test machines are available commercially for rapid testing, they have not often been used to test cartilage wear.

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