The crowned dens syndrome is an unusual manifestation of calcium pyrophosphate dihydrate crystal deposition disease and represents a rare cause of neck pain. We report seven cases of crowned dens syndrome, assessing clinical and radiological features, associated conditions, therapy, and outcome. The acute presentation of crowned dens syndrome raised suspicion for infectious meningitis and crani...

The performance of several palladium precatalysts, namely, palladium(II) acetate, palladium(0) nanoparticles encapsulated into poly(amidoamine) (PAMAM) dendrimers (Pd DENs), and palladium(II)-PAMAM complexes, in the Stille reaction between trichloro(phenyl)stannane and iodoarenes in water is compared. The reactivity of Pd DENs is similar or inferior to that of palladium(II) acetate, although th...

dens invaginatus is a rare developmental anomaly of teeth with complex root canal system morphology. the present case describes a peg shape maxillary lateral incisor with dens invaginatus (oehlers type ii), necrotic pulp, and an associated large periradicular lesion. nonsurgical endodontic treatment was performed with the aim of removing the blind sac with diamond bur under the use of operating...

We demonstrate that the reduction of p-nitrophenol to p-aminophenol by NaBH4 is catalyzed by both monometallic and bimetallic nanoparticles (NPs). We also demonstrate a straightforward and precise method for the synthesis of bimetallic nanoparticles using poly(amido)amine dendrimers. The resulting dendrimer encapsulated nanoparticles (DENs) are monodisperse, and the size distribution does not v...

We report a case of CPPD crowned dens syndrome in an 87 year white old male with a known history of pseudogout, with clinical and radiological features characteristic of this syndrome. Interestingly, there was significant mass effect on the clivus, with clivus erosion and destruction, a finding that has not previously been described with this syndrome. The clinical and radiological characterist...

Dens evaginatus is a dental anomaly found predominantly in people of Mongoloid origin. Dentists practising in Western countries should also be aware of this condition because of the increasing migration of people from Asia. Supernumerary premolars are uncommon but may be found incidentally during radiographic examination of teeth with dens evaginatus. This article reports 2 cases of concomitant...

Dens are crucial in the early development of many mammals, making den site selection an important component of parental care in such species. Resource availability and shelter from predators primarily govern den selection. Species inhabiting human-dominated landscapes typically den away from human disturbance, often shifting dens to avoid humans during the early life of their young. Domesticate...