background:  due to difficulty in obtaining anatomical reduction, management of the unstable intertrochanteric fractures in elderly osteoporotic patients is challenging. the purpose of this study is to compare the results of hip arthroplasty (total, hemi, or bipolar) with dhs in the elderly patients with unstable intertrochanteric fractures.   methods:  we prospectively studied and followed-up ...

Rapid development of engineering activities expands through a variety of rock engineering processes such as drilling, blasting, mining and mineral processing. These activities require rock dynamic fracture mechanics method to characterize the rock behavior. Dynamic fracture toughness is an important parameter for the analysis of engineering structures under dynamic loading. Several experimental...

background: at present, there is no consensus on an appropriate treatment modality for intertrochanteric fractures in the elderly with background diseases. the aim of the present study was to compare treatment outcomes of intertrochanteric fractures reduced with dynamic hip screws (dhs) and bipolar hemiarthroplasty in elderly patients with background medical conditions. methods: in this randomi...

abstract we report a 71 year-old patient with intertrochanteric fracture who had been managed with dhs and her healed fracture complicated by a subcapital femoral neck fracture. a subcapital femoral neck fracture complicating a healed intertrochanteric fracture is rare but catastrophic event. such cases are managed in a hetereogenous manner, i.e. there exists a mixture of cases treated by eithe...

The onshore oil and natural gas industries of China have started a large-scale development when crude oil reserves have been difficult to recover. The stratum fracture modification is an indispensable measure to efficiently develop oil and gas fields. Hydraulic fracturing is the most important reservoir stimulation technique, but it is still faced with various problems such as the failure to fr...

abstract traumatic hip dislocations are common in high-energy motor vehicle accidents. we present a case of a 43-year old man who sustained posterior hip dislocation with posterior wall acetabular fracture and ipsilateral intertrochantric fracture following a motorcycle accident. urgent open reduction and internal fixation of the hip fracture-dislocation and fixation of intertrochantric fractur...

In this paper dynamic fracture process due to high-speed impact of steel plunger into ceramic sample is simulated. The developed numerical model is based on finite element method and a concept of incubation time criterion, which is proven to be applicable in order to predict brittle fracture under high-rate deformation. Simulations were performed for ZrO2(Y2O3) ceramic plates. To characterize f...