BACKGROUND Polymethylmethacrylate (PMMA) cement-augmented dynamic hip screws (DHS) have been used as a solution in unstable intertrochanteric fractures (ITF). Our aim was to investigate the complications in PMMA cement-augmented DHS. METHODS All patients who had received DHS plate osteosynthesis with or without PMMA cement augmentation from August 2005 to July 2009 in one medical center were ...

This paper presents an experimental investigation on the effect of partial replacement of cement by metakalion by various percentages viz 0%, 10%, 20%, and 30% on the properties of high performance concrete, when it is subjected to magnesium sulphate attack. An aggregate binder ratio of 2 and different water binder ratios viz 0.3, 0.35, 0.40 and 0.45 was used in this investigation. Concrete spe...

This paper proposes a novel hybrid algorithm for feature selection based on a binary ant colony and SVM. The final subset selection is attained through the elimination of the features that produce noise or, are strictly correlated with other already selected features. Our algorithm can improve classification accuracy with a small and appropriate feature subset. Proposed algorithm is easily impl...

The primary aim of this study was to determine if cements based on poly(methyl vinyl ether-maleic acid) (PMVE-Ma) and tetracalcium phosphate resulted in hydroxyapatite formation. In addition, the mechanical strength of this type of polymeric calcium phosphate cement was evaluated. Cements were prepared by mixing, in a powder/liquid mass ratio of 3.0, an aqueous solution of PMVE-Ma (mass fractio...

On this study the influence of silicon dopping on the properties of the final calcium phosphate cement were analysed and compared to the ones of the conventional Si and Mg-free αTCP cement. In spite of silicon doping, Si-α-TCP calcination temperature (1400°C) was higher than the one used for conventional α-TCP (1300°C) as a result of Mg contamination on the commercial precursor used on the Si-α...

This is the first part of a two-part article describing the effects of The addition of polymers to a cement matrix can add adding poly(vinyl alcohol) (PVA) to a cement based matrix to irasignificantly to the magnitude of the "adhesion" comprove the bond at the fiber-matrix interface. Two types of fibers were ponent of bond at the fiber-matrix interface. For examused, steel and brass fibers (sim...

This work aims to automatically detect cement lines in decalcified cortical bone sections stained with H&E. Employed is a methodology developed previously by the authors and proven to successfully count and disambiguate the micro-architectural features (namely Haversian canals, canaliculi, and osteocyte lacunae) present in the secondary osteons/Haversian system (osteon) of cortical bone. This m...

The purpose of this work is the study of the use of waste glass obtained from crushed containers and building demolition as partial Portland cement replacement in mortar and concrete. For this, the waste glass must have the characteristics of pozzolanic material. In this context, a study of the pozzolanic activity of two types of glass clear and green coloured, with varying the particle size of...

Mortars with two different binders (Portland cement (PC) and high alumina cement (HAC)) were modified upon the bulk incorporation of nano-structured photocatalytic additives (bare TiO₂, and TiO₂ doped with either iron (Fe-TiO₂) or vanadium (V-TiO₂)). Plastic and hardened state properties of these mortars were assessed in order to study the influence of these nano-additives. Water demand was inc...