BACKGROUND THA performed in patients with cognitive deficits or neuromuscular diseases has been associated with a high postoperative dislocation rate. The constrained liner reportedly provides stability in patients with recurrent dislocation. However, achieving stability could be offset by early loosening when used in patients with neurologic diseases. QUESTIONS/PURPOSES We therefore asked wh...

Recently, a dislocation free deformation mechanism was proposed by Kiritani et al., based on a series of experiments where thin foils of fcc metals were deformed at very high strain rates. In the experimental study, they observed a large density of stacking fault tetrahedra, but very low dislocation densities in the foils after deformation. This was interpreted as evidence for a new dislocation...

conclusions the treatment of symptomatic ecu instability is still controversial, especially for acute dislocations. depending on the type of injury many surgical techniques have been proposed. combination of direct repair of the tendon’s subsheath and reinforcement with an extensor retinaculum graft is a reliable option. introduction dislocation/subluxation of the extensor carpi ulnaris (ecu) t...

during an eight month prospective study, 8240 newborns were examined for detection of congenital dislocation of the hip from oct. 23, 1991 to june 22, 1992. on first examination we found 1302 neonates (158/1000 live births) to have abnormal hips 1063 (81.6%) were prone to subluxation (subluxatable), 218 (16.81 %) prone to dislocation (dislocatable), 17 (1.3%) were dislocated and 4 (0.3%) were t...

 We present an exceedingly rare case of left Monteggia-Galeazzi fracture-dislocation and right Monteggiadistal radius fracture occurring simultaneously in a 20-year old male patient who had fallen 13 meters from a building. The combination of Monteggia and Galeazzi fracture-dislocation in the same forearm is very rare and, to the best of our knowledge, simultaneous bilateral Monteggia and Galea...

BACKGROUND The use of larger femoral heads has been proposed to reduce the risk of dislocation after total hip arthroplasty, but there is a lack of evidence to support this proposal. The aim of this multicenter randomized controlled trial was to determine whether the incidence of dislocation one year after total hip arthroplasty is significantly lower in association with the use of a 36-mm femo...

developmental dysplasia of the hip (ddh) is one of the most widely discussed abnormalities in neonates. the advantages of sonographic examination are well known, but its main disadvantage is that it might lead to over diagnosis, which might cause over treatment. variations in the incidence of developmental dysplasia of the hip are well known. during six months study since september 2006 all 130...

This is a report on simultaneous dislocation of the left shoulder and elbow resulting in a 16 years old boy. Bipolar dislocation of Luxatio Erecta and posterior dislocation of the elbow is extremely rare. After clinical examinations (attention to pain, swelling, and deformity of the shoulder and elbow joints and neurovascular examinations), the necessary radiography was performed for the patien...

An analytical solution is presented for the thermoelastic problem of a half-plane with several cracks under thermo mechanical loading using distributed dislocation technique. The uncoupled quasi-static linear thermoelasticity theory is adopted in which the change in temperature, if any, due to deformations is neglected. The stress field in a half-plane containing thermoelastic dislocation is ob...

An explicit solution for a moving screw dislocation in a piezoelectric bimaterial is given by means of complex variables. The electroelastic fields and forces acting on the moving dislocation are obtained in closed form. As special cases, solutions for a moving screw dislocation in a piezoelectric half-plane with a free or rigid surface are obtained explicitly.