An investigation of the effect of conformity of knee hemiarthroplasty designs on contact stress, friction and degeneration of articular cartilage: A tribological study

Hemiarthroplasty of hip joint: An experimental validation using porcine acetabulum

“…The reduction in contact stresses with the increasing conformity has also been observed in experiments carried out in vitro (McCann et al, 2009). Studies of this nature are not without limitations and errors from several sources may affect the final predictions.…”

“…These stresses can be so high that they have the potential to induce several complications in the joint such as excessive wear of the cartilage (Katta et al, 2009;McCann et al, 2009). Moreover, under-loading can also have an adverse effect on the cartilage (Harrison et al, 1953).…”

Fluid load support and contact mechanics of hemiarthroplasty in the natural hip joint

“…Further experimental work is needed to understand the response of articular cartilage in the hip to this type of tribological and biomechanical demand. We have recently shown in the knee that at higher levels of contact stress and shear stress, failure of cartilage can occur [69]. Further experimental studies are needed in the hemiarthroplasty in the hip.…”

Wear in human knees

“…The tribological response of the natural medial compartmental bovine knee was investigated in the wear of the opposing femoral cartilage [28]. Strong correlation was shown between stress and wear and between friction shear stress and wear.…”