Décembre 2000, Vol. 66, No 11 613 There is no consensus on the best procedure for restoring endodontically treated teeth. However, retrospective studies1-6 do identify factors that affect the success rate. Tooth location in the arch,1-3 type of occlusion,2 amount of remaining dentin3 and type of abutment1 affect the selection of a restorative approach that will produce a favourable outcome. Yet...

A series of alkene bearing small molecules were electrografted to the surface carbon fibers using in situ generation aryldiazonium salts. These used as an anchoring point for use Ring Opening Metathesis Polymerization (ROMP) a ‘graft from’ approach fiber modification. After modification, evaluation these modified epoxy resin, single fragmentation test, showed significant increases interfacial s...

Fibres of ultralong and aligned carbon nanotubes (CNT) have axial properties above reference engineering materials, proving to be exceptional materials for application in structural composites, energy storage other devices. For CNT fibres produced by direct spinning from floating catalyst chemical vapor deposition (FCCVD), a scaled-up method, the challenge is simultaneously achieve high process...

Despite many years of research, the detailed atomic structure of many important carbon materials remains poorly understood. In particular, the structure of those carbons which can not be transformed into graphite by high temperature heat treatment has never been clearly established. These non-graphitising carbons are of considerable commercial importance in a variety of fields, and a better und...

The preparation of sol-gel derived silica-based nanomaterials containing electrical conductive carbon fillers in an extensive composition range is described and their electrical properties are presented. Nanomaterials of carbon filler concentrations up to 60% (v/v) were obtained by dip coating or screen-printing from precursors of hydrolysed alkoxysilanes. Nanostructured morphology could be ide...

The market for composites is developing rapidly due to the widespread general requirement lightweight design in various industries. However, proliferation of fibre-reinforced limited partly lack ductility associated with these materials. Hybridisation fibres has emerged as an important strategy increase polymer composite In present work, water based dispersion was used develop a dry fibre carbo...

The anterior cruciate ligament was replaced in rabbits, using implants of carbon or polyester filaments with known mechanical properties. The biocompatibility of the implants was assessed in detail using light microscopy, and scanning and transmission electron microscopy. Mechanical tests were made of stability, in comparison with normal joints and controls after excision of the ligament. Some ...

The use of carbon fibres is being explored in synchronous belts due to their excellent mechanical properties, chemical and dimensional stability. However, poor adhesion between the common rubber-fibre adhesive resorcinol-formaldehyde-latex (RFL) compromises load transfer these constituents. We examined influence surface characteristics commercial glass fibres, such as fibre chemistry, energy ar...