background: while various radiographic parameters and application of manual/gravity stress have been proposed to elucidate instability for weber b fibula fractures, the prognostic capability of these modalities remains unclear. determination of anatomic positioning of the mortise is paramount. we propose a novel view, the gravity reduction view (grv), which helps elucidate non-anatomic position...

in this paper, a finite element model is developed for the fully hydro-mechanical analysis of hydraulic fracturing in partially saturated porous media. the model is derived from the framework of generalized biot theory. the fracture propagation is governed by a cohesive fracture model. the flow within the fracture zone is modeled by the lubrication equation. the displacement of solid phase, and...

in this paper, the mean value of strain energy density criterion has been used to predict the critical fracture load in specimens with u-shaped notch under bending loads. an equation for calculation of averaged strain energy density in this zone has been presented. bending loads under mode i have been considered. two cases have been studied: 1) the control volume only includes the semicircular ...

objective : the aim of this study was to evaluate fracture characteristics of rigid two-tooth segments splinted with fiber reinforced composite (frc), with and without application of simulated masticatory forces. material and methods: in this experimental study, 80 extracted maxillary bicuspids were joined in pairs from the buccal aspect using frc. the specimens were divided into two groups. in...

hip fracture, the most dramatic complication of osteoporosis, constitutes a serious health problem of the elderly, with great socioeconomic consequences. hip fracture epidemiology has been studied by many investigators. until now, there are no reported studies in iran regarding this issue. we studied hip fractures that occurred in iran in 2003 and compared the findings with those of other count...

Bus rapid transit (BRT) is characterized by higher speed, comfort level, and larger capacity than conventional bus service. Although many cities worldwide have adopted BRT in recent years, there an absence of scientific quantitative approach for network planning. The problem planning existing transportation very complex with constraints road geometrics, regulations, right way, travel demand, ve...

t-condylar fracture of the distal humerus is rare in the skeletally immature children and is very rare in young children, under 9 years of age. this fracture has been classified  as:  type a ( minimally displaced or undisplaced), type b (displaced  but  not comminuted ) and type c (displaced and comminuted). herein, we report a t-condylar fracture of the distal humerus in a 5-yr-old boy. this f...

statement of problem: endodontically treated teeth are more prone to fracture. the post and core are often used to provide the necessary retention for prosthetic rehabilitation. objectives: the purpose of this study was to: 1) compare the fracture strength of endodontically treated teeth restored either with nickel-chromium (ni- cr) post or non- precious gold-color alloy (npg) post compared to ...

introduction criteria for starting weight-bearing on the heel with a symptomatic calcaneal insufficiency fracture have not yet been reported. case presentation we describe a rare case of a 52-year-old woman with a calcaneal insufficiency fracture who sustained a second ipsilateral calcaneal insufficiency fracture within a short time span. the initial fracture was not evident radiographically, b...

introduction : limb fracture is always accompanied by a sever pain that doctors try to reduce it when they treat such fractures and this in turn results in a better treatment. hematoma-block is one of the ways that is used to reduce the pain in colle’s fracture. this study examines the clinical analgesia in reduction of colle’s fracture by hematoma-block. materials & methods : in this quasi exp...