We researched the qualitative changes in the polyethylene of a bipolar head retrieved at revision occurring in vivo using optical microscopy and Fourier transform infrared spectroscopy. The bearing surface of the outer head was smooth with no definable scratches delamination. However. the evidence of delamination of the beveled throat region and cracking at the base of the leaf was no... https://cosmeticssquadets.shop/product-category/power-saws/