Biomechanical comparison of cannulated small bone screws: a brief follow-up study.
The compressive forces generated by the ASIF and Herbert small bone cannulated screws were measured in the laboratory with the use of simulated bones and a custom-designed load washer as a means of quantifying their fixation capabilities. Comparative data were also generated for the Herbert scaphoid bone screw and the ASIF 4 mm cancellous screw. The cannulated Herbert bone screw and the ASIF 4 mm cancellous screw were found to have nearly identical compression capabilities. Both generated compression forces approximately five times those of the Herbert scaphoid bone screw. The ASIF small cannulated screw demonstrated a compressive capacity 2 1/2 times that of the Herbert screw.
Shaw
J A
JA
Division of Orthopedic Surgery, M.S. Hershey Medical Center, Pennsylvania State University, Hershey 17033.
D001696:Biomechanical Phenomena; D001863:Bone Screws; D001842:Bone and Bones / Q000502:physiology; D002348:Carpal Bones / Q000601:surgery; D008961:Models, Structural; D013314:Stress, Mechanical