When depth of flow past a river bridge exceeds opening under the bridge, the flow under the bridge becomes pressurized. The water is directed downward and under the bridge deck, causing increase in velocity and shear stress on the bed thereby increasing bed scour. This is termed as Pressure Flow Scour. The present study investigates the phenomenon of pressure flow scour resulting from a submerg...

The anterior commissure forms the first axon connections between the two sides of the embryonic telencephalon. We investigated the role of the transmembrane receptor Frizzled-3a in the development of this commissure using zebrafish as an experimental model. Knock down of Frizzled-3a resulted in complete loss of the anterior commissure. This defect was accompanied by a loss of the glial bridge, ...

Innovations in material science and clinical techniques have expanded the number of treatment options available for nonvital anterior teeth. These options include the use of composite to fill the access opening with no additional treatment, crown placement, orthodontic extrusion, crown lengthening with or without orthodontic extrusion, dowel restorations with crown placement, and fixed bridge o...

Objective: To choose a kind of more reasonable attachment by comparing three-dimensional finite element stresses of two kinds of attachments in anterior implant fixed bridge and posterior extracoronal attachment denture to restore maxillary edentulous jaw. Materials and Methods: The three-dimensional finite element model of extracoronal resilient attachment model (model I) was reconstructed whi...

The use of dental implants in the maxillary anterior region to replace missing teeth is a viable treatment option (Figure 1). There are many benefits of fixed dental implant-supported prosthetics versus traditional crown and bridge or removable tooth-borne prosthetics.1 Maintenance of residual bone, ease of oral hygiene, increased longevity, and noninvolvement of adjacent teeth are a few advant...

Restoration of anterior ridge defects with missing teeth both in height and width is critical for a dentist to restore. Restoration of lost teeth along with the bony defect restricts many modes of conventional treatments available. For obtaining functionally and aesthetically acceptable results a combination of fixed and removable prosthesis has turned out to be outstanding without the need for...

three unconventional details for plastic hinges of bridge columns subjected to seismic loads were developed, designed, and implemented in a large-scale, four-span reinforced concrete bridge. shape memory alloys (sma), special engineered cementitious composites (ecc), elastomeric pads embedded into columns, and post-tensioning were used in three different piers. the bridge model was subjected to...