A comparison of the fracture toughness, hardness, impact strength, and thermal expansion of two dental porcelains

Dental Porcelains are known to be very brittle materials. Ongoing research is being undertaken to obtain a porcelain of optimum strength. A recent development in this field is the new porcelain Optec HSP. In this comparative study, a series of mechanical test were performed on both Optec HSP and Ceramco II. An indentation technique was used to calculate the hardness and fracture toughness, the Izod method with a 1 ft-lb pendulum was used to obtain the impact strength, and the thermal expansion was calculated with the Dupont thermal analyser. For each material, a sample size of five and twenty specimens were used for the fracture toughness/hardness and impact strength respectively. Out of the twenty specimens used in the impact test, 10 were glazed. Optec HSP was found to be significantly larger in all of the measurements obtained. This difference is attributed to the microstructure of Optec ESP

Extrinsic Subclavian Vein Compression after Osteosynthesis of a Midshaft Clavicular Fracture in an Athlete

Clavicle fractures are common injuries. Traditionally, nonsurgical management has been favored; however, recent evidence has emerged indicating that operative fixation produces lower nonunion rates, better functional outcomes, improved cosmesis, and greater patient satisfaction. Although clavicle fixation has been considered a safe procedure, several complications related to plate fixation have been reported. We report a case of a 21-year-old basketball player that had a vascular complication associated with internal fixation of a clavicle fracture. An external compression of the subclavian vein was attributed to a long screw of a precontoured clavicular plate. Although vascular complications associated with clavicle fixation are rare, they may be limb and even life threating. It is advisable that surgeons take measures to avoid them especially when placing the medial screws

Fiesta de los gondoleros

Conjunt de particel·les dels següents instruments: Violí principal, 1r violí, 2n violí, violes, contrabaix, flautins, 1r clarinet, 2n clarinet, 1rs trompes, 2ns trompes, 1r cornetí,2n cornetí, 1r trombó, 2n trombó, 3r trombó, 1r fisvorn, 2n fiscorn, bombo, caixes, castanyolesQuadrill

Les poisons tuberculeux de la fièvre, de l’amaigrissement et de la lésion

Maignon François-Antoine. Les poisons tuberculeux de la fièvre, de l’amaigrissement et de la lésion. In: Bulletin de l'Académie Vétérinaire de France tome 100 n°1, 1947. pp. 24-27