caa a22 4500 465733735 CHVBK 20180323111748.0 cr unu---uuuuu 170327e19900601xx s 000 0 eng 10.1007/BF00453141 doi (NATIONALLICENCE)springer-10.1007/BF00453141 Biomechanics of the interlocking nail [Elektronische Daten] A study of the proximal interlock [C. Kinast, R. Frigg, S. Perren] Summary: Conventional interlocking nails for the femur use an inclined proximal interlocking screw; the AO/ASIF universal interlocking nail utilizes a transverse interlocking screw which is anchored in cortical bone. The transverse position of the screw allows one to employ the nail for either the right or left side. The yield strength of the thinner diameter transverse screw, (thread 4.5 mm, core 3.0 mm) was compared with that of the Grosse-Kempf nail oblique screw (thread 6.3 mm, core 4.5 mm) by testing in cadaver femora to evaluate the risk of fatigue failure. The test, performed using slow loading rates (50 N/s), simulated either a diaphyseal or a subtrochanteric fracture situation. The test rig applied a load corresponding to body weight and pull at the trochanter. Taking the highest load without plastic deformation as a criterion, the mechanical strength of the two screws was evaluated for each fracture situation. The thinner but shorter transverse interlocking screw demonstrated higher strength450O N vs. 3000 N; P ≤ 0.02) than the thicker inclined screw in the diaphyseal and the subtrochanteric fracture situation (2300 N vs. 1100 N; P ≤ 0.06). The biomechanical test showed the transverse screw to have sufficient and superior strength. Springer-Verlag, 1990 Kinast C. Klinikum rechts der Isar, Orthopädische Klinik und Poliklinik der Technischen Universität München, Ismaninger Strasse 22, D-8000, München 80, Germany aut Frigg R. MEM-Institut für Biomechanik der Universität Bern, Bern, Switzerland aut Perren S. Labor für experimentelle Chirurgie, Davos, Switzerland aut Archives of Orthopaedic and Trauma Surgery Springer-Verlag 109/4(1990-06-01), 197-204 0936-8051 109:4<197 1990 109 402 https://doi.org/10.1007/BF00453141 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00453141 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kinast C. Klinikum rechts der Isar, Orthopädische Klinik und Poliklinik der Technischen Universität München, Ismaninger Strasse 22, D-8000, München 80, Germany aut NATIONALLICENCE 700 1- Frigg R. MEM-Institut für Biomechanik der Universität Bern, Bern, Switzerland aut NATIONALLICENCE 700 1- Perren S. Labor für experimentelle Chirurgie, Davos, Switzerland aut NATIONALLICENCE 773 0- Archives of Orthopaedic and Trauma Surgery Springer-Verlag 109/4(1990-06-01), 197-204 0936-8051 109:4<197 1990 109 402 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer