BACKGROUND Spontaneous fracture of the humeral shaft in throwers is a rare but well-known phenomenon. Although it has been hypothesized that the biomechanics of the throw cause such fractures, it is not clear how or when the fractures occur in the pitching motion. METHODS The torque acting about the long axis of the humerus was calculated in 25 professional baseball pitchers throwing in game ...

Nine children sustained a second fracture of the distal humerus after union of an ipsilateral supracondylar fracture which had healed with cubitus varus. There were eight boys and one girl with a mean age of five years (1 to 8) at the time of the second fracture which occurred at a mean of 1.5 years after the first. In all patients, the second fracture was an epiphyseal injury of the distal hum...

Biomimicry (from bio,meaning life and mimics,meaning to imitate) is the examination of nature,its model,system,process and element and then imitate these is an appropriate manner to solve human problems. Biomechanics is the study of the structure and function of biological systems such as humans, animals, plants, organs, and cells by means of the methods of mechanics. In this paper ,the behavio...

Total elbow arthroplasty has continued to evolve over time. Elbow implants may be linked or unlinked. Unlinked implants are attractive for patients with relatively well preserved bone stock and ligaments, but many favor linked implants, since they prevent instability and allow replacement for a wider spectrum of indications. Inflammatory arthropathies such as rheumatoid arthritis represent the ...

Treatment of distal humerus nonunions may be challenging, especially in the elderly patient. Total elbow replacement has been proposed as an option in selected patients, but a high index of complications has been reported. We present the results of a linked elbow replacement in six patients older than 70 years with a symptomatic nonunion of the distal humerus. At a mean follow-up of 40 months, ...

Radiation therapy is extensively used for treatment of malignancies, but angiosarcomas occurring in an irradiated area are uncommon. We report a rare case of high-grade epithelioid angiosarcoma of upper end of right humerus in a 67-year-old male occurring ten years following irradiation for giant cell tumor of the same anatomical site. The patient presented with progressive painful swelling ove...

The purpose of this study was to determine the influence of alpha-ketoglutarate (AKG) daily administration via the digestive tract on cortical bone loss. Due to structural and physiological properties, the study was executed on humerus model in turkey. The neurectomy of the radial and mediano-ulnar nerves was applied to induce osteopenic effect in the right humerus. The experiment was conducted...

Proximal humerus fracture represents five to eight percent of all fractures and is twice as common in women than in men. Most cases of displaced fracture of the proximal humerus are treated surgically; it is probable that more cases are preferred to be treated surgically greater than required. The optimal treatment for these fractures remains controversial, but physicians have a tendency to tre...

INTRODUCTION Ossifications after osteosynthesis of the proximal humerus are poorly described. We report a case of major and early ossifications after synthesis of a fracture dislocation of the shoulder. CASE REPORT A 57-year-old man, right-handed, bipolar schizophrenic, presented after a fall, a fracture of the head and metaphysis of the humerus from the anterior notch of posterior dislocatio...