INTRODUCTION Humeral biepicondylar fracture dislocation is a very rare injury reported only once in English literature by G R Taylor et al. We report a case of humeral biepicondylar fracture dislocation in a 13-year-old girl with a unique mechanism of injury. CASE PRESENTATION A 13-year-old girl presented with trauma elbow. Radiographs showed biepicondylar fracture of humerus with dislocation...

Simultaneous dislocation of both interphalangeal (IP) joints of same finger is a highly uncommon finding. And dislocation of metacarpophalangeal (MCP) joint along with interphalangeal joints of thumb are reported in literatures if, scarcely. Here we are reporting the three cases, comprising of double dislocation of IP joints in little finger in two patients and simultaneous MCP and IP joint dis...

Direct atomistic simulations of dislocation multiplication in fcc aluminum reveal an unexpected mechanism, in which a Frank-Read source emits dislocations with Burgers vectors different from that of the source itself. The mechanism is traced to a spontaneous nucleation of partial dislocation loops within the stacking fault. Understanding and a quantitative description of this unusual process ar...

INTRODUCTION Acute patellar dislocation is a relatively common problem. The most common dislocation is laterally in the coronal plane. Sometimes spontaneous reduction occurs, but if not, closed reduction can easily be done. In this paper, we report a very uncommon type of locked dislocation which required an open reduction. CASE PRESENTATION A 16-year-old girl of Hispanic origin sustained a s...

Bipolar dislocation of the clavicle is a rare injury that is defined as a concomitant dislocation of the ipsilateral acromioclavicular joint and sternoclavicular joint. This injury is also described as a floating clavicle. Although this injury has been known for nearly two centuries, knowledge about it is limited and the treatment strategy remains controversial. Bipolar dislocation includes sev...

It is well-known that the solution for a straight dislocation in an infinite medium does not depend on the cut along which the displacement discontinuity is imposed. This is also true for a semi-infinite medium, or any simply-connected region. The stress and strain fields, energy and dislocation forces are the same regardless of the cut. Only displacements differ in the region between the two c...

The motion of an edge dislocation is analyzed for temperatures ranging from 10 K to 200 K and for stresses up to 5 GPa. The dislocation velocity versus the applied shear stress curve can be divided into four regimes corresponding to successively higher shear stresses. In the first regime, the applied shear stress is below the Peierls stress and the dislocation velocity is nominally zero. In the...

A shoulder joint dislocation is the most common dislocation in human joints. However, the treatment of a first-time traumatic shoulder dislocation is still controversial due to the high frequency of recurrence. Many studies on the factors that affect redislocation report that the most important factor is the patient's age at the time of the first dislocation.1-4) Other factors, such as the pati...