Search results for "Crown"
showing 10 items of 324 documents
Vertical misfit of laser-sintered and vacuum-cast implant-supported crown copings luted with definitive and temporary luting agents
2012
Objectives. This study aimed to evaluate the vertical discrepancy of implant-supported crown structures constructed with vacuum-casting and Direct Metal Laser Sintering (DMLS) technologies, and luted with different cement types. Study Design. Crown copings were fabricated using: (1) direct metal laser sintered Co-Cr (LS); (2) vacuum-cast Co-Cr (CC); and (3) vacuum-cast Ti (CT). Frameworks were luted onto machined implant abutments under constant seating pressure. Each alloy group was randomly divided into 5 subgroups (n = 10 each) according to the cement system utilized: Subgroup 1 (KC) used resin-modified glass-ionomer Ketac Cem Plus; Subgroup 2 (PF) used Panavia F 2.0 dual-cure resin ceme…
A study on stress distribution to cement layer and root dentin for post and cores made of CAD/CAM materials with different elasticity modulus in the …
2019
Background To evaluate the stress distribution in a maxillary central incisor with different post and cores made of six CAD/CAM materials with different elastic modulus in the absence of ferrule using the finite element analysis. Material and methods A three-dimensional endodontically treated maxillary central incisor restored with an all-ceramic crown was modelled in Rhinoceros (5.0 SR8, McNeel). The geometries were analyzed in ANSYS 17.2 (ANSYS Inc.) considering isotropic, homogeneous, linearly elastic materials with perfectly bonded contacts. The elastic moduli (E) of the post-and-cores defined the groups to be compared: nanoceramic resin (E=12.8GPa); composite resin (E=16GPa); hybrid ce…
Are Metal-Free Monolithic Crowns the Present of Prosthesis? Study of Mechanical Behaviour
2019
Purpose: To analyze in vitro the mechanical behavior of five types of complete coverage crowns fabricated from different materials. Materials and methods: Seventy-five full coverage crowns were divided into five groups according to material: Group I, metal core with feldspathic ceramic covering (MC- control group)
Influence of different restorative materials on the stress distribution in dental implants
2018
Background To assist clinicians in deciding the most suitable restorative materials to be used in the crowns and abutment in implant rehabilitation. Material and methods For finite element analysis (FEA), a regular morse taper implant was created using a computer aided design software. The implant was inserted at the bone model with 3 mm of exposed threads. An anatomic prosthesis representing a first maxillary molar was modeled and cemented on the solid abutment. Considering the crown material (zirconia, chromium-cobalt, lithium disilicate and hybrid ceramic) and abutment (Titanium and zirconia), the geometries were multiplied, totaling eight groups. In order to perform the static analysis,…
Decreased dentin tubules density and reduced thickness of peritubular dentin in hyperbilirubinemia-related green teeth.
2016
BACKGROUND It is stated anecdotally that patients with liver diseases in childhood who develop green teeth have increased risk for rampant caries, which may be secondary to changes in dental structure. The aim of this study was to test the hypothesis that hyperbilirubinemia affects the dentin morphology of green teeth. MATERIAL AND METHODS Sixteen primary teeth were prepared and divided into two groups (green teeth, n = 8 and control, n = 8), which were transversely fractured across the cervical third of the dental crowns; dentin was prepared and sputter-coated with gold, and examined under a scanning electron microscope. The mean density and mean diameter of dentin tubules, as well as the …
La centralità della dimensione mediterranea nella costruzione dell'Europa medievale: circolazione e sistemi di relazioni
2018
The expansion of the post-carolingian core in the Mediterranean area (Spain, Southern Italy, Sicily and Crusader kingdoms) is an outstanding point of the "making of Europe" (according to R. Bartlett), along with the achievement of a commercial hegemony on the Mediterranean routes by Western merchants. Nevertheless, historical researches and syntesis did not consider enough the role played by institutional compounds that unified a large part of the Mediterranean area under the same power. The history of the so-called Crown of Aragon is an example of the extent to wich political unification initiated strong trends of circulation of nobles, royal officiers and merchants between the dominions o…
Conflicts, equilibria, hegemonies: the case for Catalan-Aragonese expansion as a starting point in late medieval Mediterranean studies based on a sur…
2019
The essay summarizes the main trends of the studies in Mediterranean medieval history to introduce the case of the "Crown of Aragon", whose expansion between 13th and 14th Centuries has been a turning point on the political and commercial equilibria of the area.
Adaptation of the tropical hybrid Euphorbia×lomi Rauh to the exposure to the Mediterranean temperature extremes
2014
Abstract Poysean ( Euphorbia × lomi Rauh) has been introduced in the Mediterranean countries as an ornamental plant for indoor uses. When used outdoor, few information is available about its ability to withstand the Mediterranean temperature extremes. An experiment in an open stand was performed to evaluate poysean tolerance to the winter and summer temperatures of the thermo Mediterranean climate and its ornamental value for urban greening. Two genotypes of poysean (Nguen Muang, NM; and Soi Budsanin, SB) with similar bracts and flower colours were grown at either 2 or 3 plants per pot during 23 months. Number of flower racemes and leaves per plant and plant height were recorded monthly. Ov…
EFFECT OF CULTIVAR AND CROWN SIZE ON YIELD AND QUALITY OF STRAWBERRY FRESH BARE ROOT PLANTS IN SICILY
2012
In the southern regions of Mediterranean areas the plantations with fresh plants (winter planting system) have almost completely replaced those with cold stored plants (summer planting system). Particularly, fresh bare root plants produced in high elevation nurseries located in Spain and Poland and, in experimental phase, in the southern of Italy (in the mountains of Sicily, Calabria, Basilicata) are the most used. Such type of plant usually has a crown diameter from 6 to 14 mm, but the smallest plants should be (<8 mm) discarded in phase of selection and packing. Objective of this study was to investigate the influence of the different crown diameter on the earliness, productivity and qual…
Ressenya a Antonio Cortijo Ocaña (ed.), Chivalry, the Mediterranean, and the Crown of Aragon (2018)
2018

 Ressenya a Antonio Cortijo Ocaña (ed.), Chivalry, the Mediterranean, and the Crown of Aragon, Califòrnia, University of California-Santa Barbara-Juan de la Cuesta Hispanic Monographs- Institució Alfons el Magnànim, 2018, 196 pp., ISBN: 978-1-58871-316-2
 
 Review to Antonio Cortijo Ocaña (ed.), Chivalry, the Mediterranean, and the Crown of Aragon, California, University of California-Santa Barbara-Juan de la Cuesta Hispanic Monographs;-Institució Alfons el Magnànim, 2018, 196 pp., ISBN: 978-1-58871-316-2