[Experimental determination of sliding friction during insertion of femoral intramedullary nails].
No data have published concerning the procedure of driving in intramedullary nails. An extensive experimental device consisting of a contact-free distance measurement, a dynamograph connected to strain gages and an accelerometer now enabled this investigation. Among other things we determined the range of sliding friction for each stroke at different levels of nail-progression. Depending of the depth of nail-progression forces between 200 N und 400 N were measured. When the nail is stuck these values rise to over 1000 N. The sliding-process lasted between 10 ms and 20 ms. Knowledge of these data is of major importance for improvement of surgical technique and possible development of mechanical nail-insertion aids.
von Issendorff
W D
WD
Klinik und Poliklinik für Unfallchirurgie, Universitätsklinikum Mainz.
Ritter
G
G
Ahlers
J
J
Kurock
W
W
D001696:Biomechanical Phenomena; D005269:Femur / Q000502:physiology / Q000601:surgery*; D005594:Fracture Fixation, Intramedullary; D006801:Humans; D013314:Stress, Mechanical
Experimentelle Bestimmung der Gleitreibungskräfte beim Einschlagen von Oberschenkelmarknägeln.