This paper identifies the mechanisms of phase and structural transformations during severe plastic deformation by shearing under pressure (high-pressure torsion) an Al-Zn-Mg-Fe-Ni-based aluminum alloy depending on different initial states material (an ingot after homogenizing annealing a rod produced radial-shear rolling). Scanning transmission electron microscopy are used to determine morpholo...

OBJECTIVE The purpose of this study was to compare the biomechanical behavior of using two versus three locking screws per bone segment in a cadaveric humerus fracture gap model. METHODS Six matched pairs of elderly osteoporotic fresh-frozen human cadaveric humerii were used. An eight-hole locking compression plate was placed posteriorly on the humeral shaft and secured with either four or si...

STUDY DESIGN Cadaveric biomechanical analysis. OBJECTIVE The aim of this study was to compare three interbody cage shapes and their position within the interbody space with regards to construct stability for transforaminal lumbar interbody fusion. METHODS Twenty L2-L3 and L4-L5 lumbar motion segments from fresh cadavers were potted in polymethyl methacrylate and subjected to testing with a ...

BACKGROUND Pure moment testing is a common method used in cadaveric spine testing. The fundamental basis for the widespread acceptance of applying a pure moment is uniform loading along the column of the spine. To our knowledge, this protocol has not been experimentally verified on a multi-degree of freedom testing apparatus. Given its ubiquitous use in spine biomechanics laboratories, confirma...

The paper proposes a model of a fatigue device for testing dedicated to ankle prostheses. The concept of the testing device relies on two aspects: almost any type of ankle prosthesis can be tested on it and it has to work on INSTRON axial-torsion testing machine. Starting from these requirements, a 3D functional assembly that reproduces the real movement of the ankle joint during gait cycle has...

A novel experimental set-up is proposed to perform in-plane torsion experiments on grooved disk specimens. As compared previously systems, an enhanced clamping system introduced enable the testing of high strength materials such as dual phase steels. The achieved without applying pressure through axial actuator. Instead a custom-made washer-nut used which allows for monitoring entire specimen f...