We compared six methods for isolating high-density lipoproteins from normal and lipemic serum. Cholesterol was determined by two different enzymic methods. The values for high-density lipoprotein cholesterol obtained with two (centrifugation-speed) modifications of the heparin/Mn2 method and with the phosphotungstate/Mg2t the dextran sulfate/Mg2, and the polyethylene glycol methods were compare...

PURPOSE The aim of this study was to evaluate the bone repair process in the maxillary sinus in monkeys treated with high-density porous polyethylene (Medpor) METHODS Four capuchin monkeys (Cebus apella) were submitted to bilateral horizontal osteotomies in the anterior wall of the maxillary sinus and divided into 2 groups: control group, left side with no implants, and porous polyethylene gr...