caa a22 4500 605458200 CHVBK 20210128100227.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s00167-015-3775-5 doi (NATIONALLICENCE)springer-10.1007/s00167-015-3775-5 A mechanical pivot-shift device for continuously applying defined loads to cadaveric knees [Elektronische Daten] [Mark Sena, Ryan DellaMaggioria, Jeffrey Lotz, Brian Feeley] Purpose: Current techniques to study the biomechanics of the pivot-shift utilize either static or poorly defined loading conditions. Here, a novel mechanical pivot-shift device that continuously applies well-defined loads to cadaveric knees is characterized and validated against the manual pivot-shift. Methods: Six fresh-frozen human lower limb specimens were potted at the femur, mounted on a hinged testing base, and fitted with the mechanical device. Five mechanical and manual pivot-shift tests were performed on each knee by two examiners before and after transecting the ACL. Three-dimensional kinematics (anterior and internal-rotary displacements, and posterior and external-rotary velocities) and kinetics (forces and moments applied to the tibia by the device) were recorded using an optical navigation system and 6-axis load cell. Analysis of variance and Bland-Altman statistics were used to gauge repeatability within knees, reproducibility between knees, agreement between the mechanical and manual test methods, and agreement between examiners. Results: The forces and moments applied by the device were continuous and repeatable/reproducible to within 4/10% of maximum recorded values. Kinematic variables (excluding external-rotary velocity) were qualitatively and quantitatively similar to manual pivot-shift kinematics, and were more repeatable and reproducible. Conclusion: The presented device induces pivot-shift-like kinematics by applying highly repeatable three-dimensional loads to cadaver knees. It is based on a simple mechanical principle and designed using easily obtainable components. Consequently, the device enables orthopaedic biomechanists to easily and reliably quantify the effect of ACL injury and reconstruction on pivot-shift kinematics. European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA), 2015 ACL nationallicence Pivot-shift nationallicence Rotational instability nationallicence Force nationallicence Moment nationallicence Device nationallicence Sena Mark Sports Medicine and Shoulder Surgery, Department of Orthopaedic Surgery, University of California, San Francisco 1500 Owens Ave, 94158, San Francisco, CA, USA aut DellaMaggioria Ryan Sports Medicine and Shoulder Surgery, Department of Orthopaedic Surgery, University of California, San Francisco 1500 Owens Ave, 94158, San Francisco, CA, USA aut Lotz Jeffrey Sports Medicine and Shoulder Surgery, Department of Orthopaedic Surgery, University of California, San Francisco 1500 Owens Ave, 94158, San Francisco, CA, USA aut Feeley Brian Sports Medicine and Shoulder Surgery, Department of Orthopaedic Surgery, University of California, San Francisco 1500 Owens Ave, 94158, San Francisco, CA, USA aut Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/10(2015-10-01), 2900-2908 0942-2056 23:10<2900 2015 23 167 https://doi.org/10.1007/s00167-015-3775-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00167-015-3775-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sena Mark Sports Medicine and Shoulder Surgery, Department of Orthopaedic Surgery, University of California, San Francisco 1500 Owens Ave, 94158, San Francisco, CA, USA aut NATIONALLICENCE 700 1- DellaMaggioria Ryan Sports Medicine and Shoulder Surgery, Department of Orthopaedic Surgery, University of California, San Francisco 1500 Owens Ave, 94158, San Francisco, CA, USA aut NATIONALLICENCE 700 1- Lotz Jeffrey Sports Medicine and Shoulder Surgery, Department of Orthopaedic Surgery, University of California, San Francisco 1500 Owens Ave, 94158, San Francisco, CA, USA aut NATIONALLICENCE 700 1- Feeley Brian Sports Medicine and Shoulder Surgery, Department of Orthopaedic Surgery, University of California, San Francisco 1500 Owens Ave, 94158, San Francisco, CA, USA aut NATIONALLICENCE 773 0- Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/10(2015-10-01), 2900-2908 0942-2056 23:10<2900 2015 23 167