نتایج جستجو برای: extension fracture

تعداد نتایج: 242352  

The explosion process of explosives in a borehole applies a very high pressure on its surrounding rock media. This process can initiate and propagate rock fractures, and finally, may result in the rock fragmentation. Rock fragmentation is mainly caused by the propagation of inherent pre-existing fractures of the rock mass and also from the extension of the newly formed cracks within the intact ...

  Background: Trans-scaphoid perilunate fracture-dislocation and perilunate dislocations are among uncommon injuries, most commonly seen in young patients due to high energy trauma. The treatment can be achieved either surgically by open reduc tion and internal fixation or closed reduction and casting.   Methods: To compare surgical versus non-operative results of treatment of trans-scaphoid pe...

Journal: :the archives of bone and joint surgery 0
farshid bagheri orthopedic research center, ghaem hospital mashhad university of medical sciences, mashhad, iran. mohhamad h taraz jamshidi orthopedic research center, ghaem hospital mashhad university of medical sciences, mashhad, iran. ali birjandinejad orthopedic research center, ghaem hospital mashhad university of medical sciences, mashhad, iran. seyyed reza sharifi daloei orthopedic research center, ghaem hospital mashhad university of medical sciences, mashhad, iran. masoud mirkazemi orthopedic research center, ghaem hospital mashhad university of medical sciences, mashhad, iran. meysam fathi choghadeh orthopedic research center, ghaem hospital mashhad university of medical sciences, mashhad, iran.

background: trans-scaphoid perilunate fracture-dislocation and perilunate dislocations are among uncommon injuries, most commonly seen in young patients due to high energy trauma. the treatment can be achieved either surgically by open reduc tion and internal fixation or closed reduction and casting.   methods: to compare surgical versus non-operative results of treatment of trans-scaphoid peri...

Journal: :medical journal of islamic republic of iran 0
hooman shariatzadeh iran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) dawood jafari iran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) hamid taheri iran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) alireza pahlevansabagh iran university of medical sciences, department of hand surgery, shafayahyaian hospital,سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) farid najd-mazhar iran university of medical sciences, tehran, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) ahmad shakib ghanizadeh

abstract  background: the goal of this report is to show our results with extension block technique for treatment of mallet fracture. the indications for this technique were the presence of a large bone fragment, and palmar subluxation.  methods: we retrospectively assessed the results of treatment in 14 mallet fractures  which have been treated by extension block technique to determine the ran...

Dentoalveolar fracture is defined as a fracture in the bone surrounding the teeth without any extension to the basal bones of the maxilla or mandible (1). As for other parts of the facial skeleton, the treatment strategy for dentoalveolar fractures consists of fracture reduction, fixation and immobilization (2); however, some dentoalveolar fractures are difficult to treat. In some dentoalveola...

Journal: :The Boston Medical and Surgical Journal 1919

M. Moradi, M. Pourmahmoud

Modeling of crack propagation by a finite element method under mixed mode conditions is of prime importance in the fracture mechanics. This article describes an application of finite element method to the analysis of mixed mode crack growth in linear elastic fracture mechanics. Crack - growth process is simulated by an incremental crack-extension analysis based on the maximum principal stress c...

Background and purpose: Supracondylar fracture of the humerus is common in children and various surgical procedures are used to manage this condition. This study was conducted to compare the treatment results of open surgical approaches; external (lateral) and posterior access. Materials and methods: This cross-sectional study was performed in 200 children (younger than 10 years of age) with s...

Journal: :journal of mechanical research and application 2009
mehdi pourmahmoud

modelling of crack propagation by finite element method under mixed mode conditions is of prime importance in fracture mechanics. this paper describes an application of finite element method to the analysis of mixed mode crack growth in linear elastic fracture mechanics. crack growth process is simulated by an incremental crack-extension analysis based on the maximum principal stress criterion,...

Journal: :trauma monthly 0
reza tavakoli darestani department of orthopedics, imam hossein medical center, shahid beheshti university of medical sciences, tehran, ir iran; department of orthopedics, imam hossein medical center, shahid beheshti university of medical sciences, tehran, ir iran. tel.: +98-2177558081, fax: +98-2177557069 gholamhosein kazemian department of orthopedics, imam hossein medical center, shahid beheshti university of medical sciences, tehran, ir iran mohammad emami moghaddam department of orthopedics, imam hossein medical center, shahid beheshti university of medical sciences, tehran, ir iran alirea manafi rasi department of orthopedics, imam hossein medical center, shahid beheshti university of medical sciences, tehran, ir iran yadollah alipour department of orthopedics, imam hossein medical center, shahid beheshti university of medical sciences, tehran, ir iran mohammad mahdi bagherian lemraski department of orthopedics, imam hossein medical center, shahid beheshti university of medical sciences, tehran, ir iran

conclusions we recognized this type of fracture and treated it similarly to both column fractures. we recommend that the classification of acetabular fractures be modified to include this type of fracture. introduction acetabular fractures are a common problem among young males. an acetabular fracture with disruption of the joint surface, if untreated, will rapidly lead to post-traumatic osteoa...

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