title: Holding power of different screws in the femoral head. A study in human cadaver hips.
abstract: The holding power of four different bone screws was measured by a pull-out test in 40 cadaver hips from 10 females and 10 males over 70 years of age. Each femoral head was used to test a 6.5 mm cancellous bone screw and a 12.7 mm hip compression screw. The holding power was higher in screws with a long or wide thread. Generally, the holding power in bones from females was about 70 per cent of that in bones from males.
mesh_terms: D000368:Aged; D001863:Bone Screws; D002102:Cadaver; D005260:Female; D005270:Femur Head; D006801:Humans; D008297:Male; D013314:Stress, Mechanical; D013718:Tensile Strength