Introduction: The occurrence rate of hip fractures due to osteoporosis is rapidly increasing, representing one of the most serious and urgent social problems. We focused on a computed tomography-based finite element method (CT/FEM) to quantify structural strength, thereby developing a nonlinear CT/FEM to achieve accurate assessment of strength of the proximal femur [1]. The aim of this study wa...

Periprosthetic fracture (PPF) of the Femur is a common complication of hip arthroplasty. With increasing rates of total hip replacements, the occurrence of periprosthetic fractures is expected to rise. These fractures are often challenging to treat effectively due the technical challenges presented with the combination of fractured bone and an unstable prosthesis. Failure of locking plate fixat...

BACKGROUND Cyclo-oxygenase-2 (Cox-2) is an inflammatory mediator that is necessary for the tissue repair, including bone fracture healing. Although the application of Cox-2 gene therapy to a murine closed femoral fracture has accelerated bony union, but the beneficial effect was not observed until the endochondral stage of bone repair that is well after the inflammatory stage normally subsides....

The aim of this study was to evaluate the fracture strength of teeth with different cavosurface margin cavity preparations and restored with composite resin and different adhesive systems. Eighty premolars were randomly divided in 8 groups, as follow: G1- sound teeth; G2- MOD preparation (no restoration); G3- Adper Single Bond without bevel preparation (butt joint); G4- Adper Single Bond with b...

BACKGROUND Patients treated with the Melody device (Medtronic) for percutaneous pulmonary valve implantation experience stent fractures in ≈25% of the cases. The aim of this study is to identify the risk factors associated with fracture using 3-dimensional (3D) analyses. METHODS AND RESULTS In situ 3D shape of the Melody stent was reconstructed from 42 patients using procedural biplane fluoro...

Despite substantial clinical interest in the fracture resistance of human dentin, there is little mechanistic information in archival literature that can be usefully used to model such fracture. In fact, although the fracture event in dentin, akin to other mineralized tissues like bone, is widely believed to be locally strain-controlled, there has never been any scientific proof to support this...

background hypotension during spinal anesthesia is common and can lead to severe injuries and even death. administration of crystalloid fluids is advised to prevent occurrence of hypotension; however its effectiveness is still the matter of arguments. objectives this study was designed to compare the effects of ringer`s lactate and hydroxyethyl starch 6% on hemodynamic parameters after spinal a...

this article aims to review various modes of fracture toughness of resin composites. also, this study intends to review the papers on the fracture mode, namely “fractography”, under scanning electron microscopy finding fracture initiation site, and the effect of filler content on the fracture toughness of resin composites. it will also review the effect of aging on the fracture toughness of res...

introduction: the restoration of endodontically treated teeth is a topic that has been studied extensively but it is still a challenge for dental practitioners. the aim of this study was to evaluate fracture resistance, fracture patterns and fracture location of endodontically treated human maxillary premolars restored with direct and indirect composite resin and ceramic restoration. methods: e...

Although the methods of reduction and fixation of fractures Have been constantly changing since the days of Hippocrates the method of healing has never changed, and never will. It takes a very considerable force to fracture a normal bone: If the bone breaks after a trivial accident the fracture is said to be Pathological. Bone shows an exception from the normal healing of other structures which...