A case of complex paediatric elbow trauma, comprising of fracture lateral condyle associated with posterior dislocation of elbow is presented. Concomitant elbow dislocation was managed by closed reduction under sedation, assessing the elbow stability under general anaesthesia along with lateral condylar fracture fixation using cannulated cancellous screw. The patient had an uneventful recovery ...

The structure of the “star” defect in 4H-SiC substrates and its effects on the extended defect structures in the epilayers were studied by molten KOH etching and transmission x-ray topography. Star defects consist of a center region with high densities of threading dislocations (both edge and screw types) and six arms of dislocation arrays extending along <11-20> directions. In addition, multip...

We compare mechanical strength of f.c.c. gold and b.c.c. molybdenum single crystal pillars of sub-micrometer diameter in uniaxial compression ests. Both crystals show an increase of flow stress with decreasing diameter, but the change is more pronounced in Au than in Mo. The ratio etween the observed maximum flow stress and the theoretical strength is much larger in Au pillars than in Mo pillar...

Initial dislocation structure in annealed high-purity Mo single crystals and deformation substructure in a crystal subjected to 1% compression have been examined and studied using transmission electron microscopy (TEM) techniques in order to investigate dislocation multiplication mechanisms in the early stage of plastic deformation. The initial dislocation density is in a range of 10 ∼ 10 cm, a...

In the present paper we investigate classical self-interaction associated with a charged scalar point particle placed at rest in gravitational field of linear topological defect known literature as cosmic dispiration, combination string screw dislocation. We found exact expressions for Green's function and, consequently, self-energy by considering both massive and massless particles. numerical ...

This study evaluated complications associated with implant depth in headless compression screw treatment of an osteochondral fracture associated with a traumatic patellar dislocation in a 21-year-old woman. Computed tomography and X-rays showed one lateral fracture fragment measuring 25 × 16 mm. Osteosynthesis was performed with two headless compression screws. Five months later, the screws wer...

The nature and configuration of the dislocations generated during the incipient stages of plasticity in nanoindentations are still to a large extent unclear. In previous studies we have recognised and characterised by STM a number of novel surface defects in the surface of fcc metals generated by nanoindentation. We have analysed [1] the generation and kinetics of two types of dislocation confi...

The authors retrospectively evaluated the effects of a single cortical screw in the open reduction and internal fixation of displaced distal clavicle fractures. Fifteen patients without associated acromioclavicular joint dislocation were treated by open reduction and internal fixation with a single cortical screw (4.5-mm diameter, 60-mm length) between 2004 and 2011. Mean follow-up was 39.2 mon...