BACKGROUND The glenohumeral joint is subjected to opposing forces when the direction of shoulder motion is changed, accelerating and decelerating to make the movements. The influence of motion velocity or acceleration on translation of the humeral head has not been evaluated although direction and distance of humeral head translation has been analyzed in real time in normal shoulders. We hypoth...

Several recent reports have described the minimally invasive plate osteosynthesis (MIPO) technique in the treatment of humeral shaft fractures by the anterior approach. The purpose of this study is to identify the danger zone for locking screw placement to avoid musculocutaneous nerve injury in the anterior compartment and radial nerve injury in the posterior compartment of the humerus relative...

INTRODUCTION An increased bone mineral density (BMD) in the proximity to tendon insertion can improve rotator cuff repair and healing. However, how a decrease of BMD in the humeral head affects the biomechanical properties of the rotator cuff tendon is still unclear. Previous studies have demonstrated ovariectomy in animals to lead to osteoporosis and decreased BMD, and Teriparatide (PTH) admin...

We report a case of a 29-year-old man who presented with a distal humeral shaft fracture sustained by blunt trauma. Physicalexamination and nerve conduction study were consistent with injury to the median and radial nerves proximal to theelbow. The patient underwent open reduction and internal fixation of the humeral shaft fracture with neurolysis of the medianand radial nerves. Repeat electrom...

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...

BACKGROUND Humeral retroversion angles determined by previous techniques are varied and/or biased by morphologic variations of the proximal and distal humerus, and their validity should be revisited. To overcome the limitations of previous studies associated with 2-dimensional (2D) images and the reference axes, a 3-dimensional (3D) measurement of humeral retroversion is required. However, comp...

Predicting a hand’s position using only biosignals is a complex problem that has not been completely solved. The only reliable solution currently available requires invasive surgery. The attempts using non-invasive technologies are rare, and usually have led to lower correlation values (CVs) between the real and the reconstructed position than those required for real-world applications. In this...

For the purpose of improving the efficiency of a body-powered prosthesis, a control cable system was developed which uses a pulley and a cable housing which includes a highly slippery plastic liner. Improvements were also made to the harness. In this paper, the mechanism of these systems is firstly described and then, the results of a clinical evaluation test of a practical model is presented a...

The increase in the number of shoulder arthroplasties has also created a paradoxical increase in the number of revision procedures. These revision surgeries can be complicated by well-fixed humeral components that require removal. In this article, we report a representative revision arthroplasty that involved a novel technique, vertical humeral osteotomy, which allowed for safe and effective hu...

Introduction: Approximately 15 to 20 percent of all proximal humeral fractures are displaced and require operative treatment [1]. Reduced bone quality of the humeral head complicates internal fixation and may result in implant loosening, fracture re-displacement and poor functional outcome for the patient [2, 3]. Little is known about the effect of bone mineral density (BMD) on internal fixatio...