OBJECTIVES To evaluate risk factors for dislocation after primary total hip arthroplasty (THA), and its functional outcomes. MATERIAL AND METHODS A retrospective study was conducted on 22 cases with dislocation and 431 controls without dislocation, all performed with lateral access. The data were collected prospectively with a minimum follow-up of 5 years. Patient related factors, from primar...

BACKGROUND Dislocation rates of continuous peripheral nerve block are poorly described even though this technique is frequently used in clinical practice. The present study was designed to evaluate dislocation rates over time of interscalene and femoral nerve catheters under defined experimental circumstances. Ultrasound (US) monitoring was used to detect the position of the perineural catheter...

Solutions are obtained for the stress and pore pressure due to sudden introduction of plane strain dislocations in a linear elastic, fluid-infiltrated, Biot, solid. Previous solutions have required that the pore fluid pressure and its gradient be continuous. Consequently, the antisymmetry (symmetry) ofthe pore pressure p about y = Orequires that this plane be permeable (p = 0) for a shear dislo...

Threading dislocations (TDs) can be reduced by in-situ deposition of intermediate SiNx sub-monolayers in group III-nitride heterostructures and their ternary alloys. Here we observe efficient dislocation density decreasing at the SiNx nano-mask in an AlxGa1 xN layer with x1⁄40.2 grown epitaxially on c-plane sapphire by low pressure MOVPE. However we did not achieve high annihilation efficiency ...

BACKGROUND This study was aimed at evaluating whether or not patients with chronic type III acromioclavicular dislocation develop cervical spine pain and degenerative changes more frequently than normal subjects. METHODS The cervical spine of 34 patients with chronic type III AC dislocation was radiographically evaluated. Osteophytosis presence was registered and the narrowing of the interver...

Dislocation is a serious complication in total hip replacement (THR). An inadequate range of movement (ROM) can lead to impingement of the prosthesis neck on the acetabular cup; furthermore, the initiation of subluxation and dislocation may occur. The objective of this study was to generate a parametric three-dimensional finite element (FE) model capable of predicting the dislocation stability ...

Background: The epidemiology of traumatic dislocations and ligamentous/tendinous injuries is poorly understood. In this study, we aimed to evaluate the prevalence and distribution of various dislocations and ligamentous/tendinous injuries in a tertiary orthopedic hospital in Iran. Methods: Musculoskeletal injuries in an academic tertiary health care center in Tehran February 2005 to October 201...

Five cases of anterior shoulder dislocation are reported. The dislocations were reduced quickly, painlessly and without the use of drugs using the 'Cunningham technique.' The practice and theory of the technique are described. The 'Cunningham technique' is a useful single operator method of reducing anterior shoulder dislocations. Further research is being undertaken to reproduce the results in...

BACKGROUND A possible difficulty in intra-articular fracture of the distal radius is the displacement tendency of the radial styloid process due to the tension of the brachioradialis tendon. METHODS Ten patients treated within one year for complex distal radius fractures by double-plating technique with a radial buttress plate and volar locking plate, through a single volar approach, were fol...

The heteroepitaxial growth of gallium nitride (GaN) on sapphire substrates by metal-organic chemical vapor deposition is most commonly carried out using the two-step growth process. This process involves the deposition of a thin GaN nucleation layer (NL) at a temperature of approximately 450–600 1C. The morphology of this low-temperature film after annealing is known to have a crucial effect on...