Comment on “Hydrostatic Pressurization and Depletion of Trapped Lubricant Pool During Creep Contact of a Rippled Indenter Against a Biphasic Articular Cartilage Layer”, [Stoltz, M. A., Basalo I. M., and Ateshian, G. A., 2003, J. Biomech. Eng. 125, pp. 585–593.]

In the Conclusion section of the above article its authors wro ‘‘ . . . contrary to the weeping hypothesis, however, the curr analysis demonstrates that @after load is applied # lubricant fluid trapped between a rigid impermeable surface and a por permeable cartilage layer flows monotonically into the cartila during contact creep; no fluid flow from the cartilage into t lubricant pool is observe d . . . . @T#his result is in better agreemen with the premise of the boosted lubrication theory of Walker et @1#’’ The article gives the duration of ‘‘contact creep’’ as .4 secon for roughness similar to that of cartilage @2# and about 10 second for roughness 5 times as tall and 10 times longer in wavelen