نتایج جستجو برای: fracture
تعداد نتایج: 94928 فیلتر نتایج به سال:
In this paper, a new method for fracture analysis of notched cylindrical cases under explosive loading of High Explosive internal charge has been presented to determine fracture time, fracture radius, fragment velocity and acceleration. Also the fracture dynamics has been simulated by explicit and nonlinear LS-DYNA code. In numerical simulation the behaviour of metallic case has been modeled by...
PURPOSE To determine if specific coronoid fractures relate to specific overall traumatic elbow instability injury patterns and to depict any relationship on fracture maps and heat maps. METHODS We collected 110 computed tomography (CT) studies from patients with coronoid fractures. Fracture types and pattern of injury were characterized based on anteroposterior and lateral radiographs, 2- and...
OBJECTIVE Hearing impairment has been suggested to increase the risk of falls. However, most previous studies were conducted in an older population without classification of the fracture regions. This study aimed to delineate the risk of each fracture type in all age populations. METHODS The Korean National Health Insurance Service-National Sample Cohort was collected from 2002 to 2013. A tot...
Background: The fracture of the mandible is the second most common facial bone injury. When this injury occurs, it could be serious with complications that may even result in death. Objective: To evaluate the current trends in mandibular fracture (MF) in southern Iran. Methods: In a cross-sectional study, several parameters including age, sex, cause of fracture, anatomical site of fracture, pr...
Background: The economic burden of the treatment of hip fracture would be enormous, especially in countries like Iran with an aging population and limited financial resources. The choice of anesthetic technique for hip fracture surgery is controversial. We conducted this retrospective 4 year study to evaluate the effect of regional versus general anesthesia on the length of hospital stay and th...
displaced fracture of the acromion without associated shoulder injury occurs rarely. a 31-year-old gentleman presented with an isolated acromion fracture resulting from a direct trauma to the top of his left shoulder. open reduction and internal fixation using multiple pins was performed and the fracture was closed without complications. the patient achieved excellent shoulder function and rank...
at neck region called as Trans cervical neck fracture. Third bone shows fracture that happens at intertrochanteric line of femur bone known as Intertrochanteric fracture. The fourth bone shows the fracture that happens at sub trochanteric region named as subtrochanteric fracture, Fracture that happens at greater trochanter region shown in fifth bone is known as fracture at greater trochanter, i...
Fracture behavior of a 7075 aluminium alloy reinforced with 15 Vol%. SiC particles was studied after T6 and annealing heat treatments under uniaxial tensile loading at room temperature. The scanning electron microscopy of fractured surfaces and EDS analysis showed:, that fracture mechanism changed from due mainly to fractured particle in T6 condition to interface decohesion in samples in anneal...
An investigation into the mixed mode fracture of steel fiber reinforced concrete (SFRC)beams with one percent volume fraction of steel fiber is presented. A series of notched beams withdifferent notch depths and locations are tested under three-point bending. The test results for apparentfracture toughness, crack trajectories, and fracture energy are presented. The crack paths for SFRCand plain...
THis cross-sectional study was performed on 382 patients with depressed skull fracture admitted to the neurosurgery ward of Kerman Bahonar Haspital between 1994 and 1999.329 of the patients(86.1%) had open fractures,while the fracture was of closed type in 53 cases (13.9%).of those with open fracture,42%were associated with dura tearing ,whereas the rate was 34% in closed fractures.the most co...
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