Search results for "restoration"
showing 10 items of 584 documents
Clinical study on resin composite and glass ionomer materials in II class restorations in permanent teeth
2020
Background Glass ionomer cements (GIC) used for restoration of missing dental structures have high biocompatibility and remineralization potential. However, low mechanical resistance excludes their use for long-term restorations of extensive lesions, particularly on approximal surfaces in permanent dentition. GIC with increased viscosity have much better physical properties, which involves better bonding and wear resistance, so they can be considered as an alternative to composite resin materials. The aim of this study was to perform a clinical and radiological assessment of restorations in permanent teeth, made with an increased viscosity GIC - Equia Fil (Ivoclar Vivadent) with Equia Coat …
Prospective study of monolithic zirconia crowns: clinical behavior and survival rate at a 5-year follow-up
2020
Purpose To evaluate the clinical behavior and survival of full coverage monolithic zirconia crowns on posterior teeth over a 5-year follow-up. Methods Fifty patients were recruited and underwent restoration with a Lava Plus monolithic zirconia crown (Lava™ Frame Zirconia, 3M Espe, Germany) on premolars or molars. Patients were monitored over a 5-year follow-up (2014-19), recording any biological and/or mechanical complications; these data were used to estimate the crowns' success rate. Periodontal clinical parameters were recorded (pocket probing depth (PPD), plaque index (PLI), bleeding on probing (BOP), and gingival recession (GR)). Wear to the zirconia crowns and antagonist teeth were al…
Nanotechnology in restoration: cleaning and consolidation of stonework
2011
Nanotechnology is a science that utilises methods and techniques to manipulate material on a size-scale smaller than a micrometre (normally between 1 and 100 nanometres) and has the aim of producing materials with particular chemical-physical characteristics. It constitutes a true multi-disciplinary sphere of investigation, involving numerous areas of research, ranging from molecular biology to chemistry, from the science of materials to (applied and basic) physics, to mechanical and electronic engineering. Nanotechnology’s present and future applications render this an issue of great current interest, bearing in mind not only its innovative character, but also its possible impact on indust…
Contributi alla interpretazione, conservazione e restauro dei manufatti storico-artistici dell’Orto Botanico di Palermo: il Paride di Nunzio Morello
2017
Contributions to the interpretation, conservation and restoration of the historical and artistic artifacts of the Botanical Garden of Palermo: the Paride by Nunzio Morello – Purely cognitive and conservative requirements of the historical-artistic heritage of the Botanical Garden of the University of Palermo, have led the authors to present one of the most representative monuments of such Garden that is of great artistic and cultural value in the City of Palermo: the Paride Pensante, a marble sculpture made in 1839 by the Palermo sculptor Nunzio Morello - a pupil of the most famous artist Valerio Villareale - donated to his homeland and placed in the men- tioned Botanical Garden, in the squ…
Architettura religiosa nei castelli normanni di Sicilia e la fruizione e valorizzazione della chiesa dei Santi Filippo e Giacomo nel castello di Mare…
2014
Il saggio riporta i contenuti del mio abstract per il convegno “Fortificazione, memoria, paesaggio”, promosso in occasione dei Cinquant’anni di attività dell’Istituto Italiano dei Castelli, onlus, 1964-2014. Bologna 27-29 novembre 2014. Il convegno è stato organizzato dall’Istituto Italiano dei Castelli Onlus, dal Dipartimento di Storia Culture Civiltà Alma Matere Studiorum – Università di Bologna. Il saggio indaga l’architettura religiosa presente nei castelli normanni di Sicilia, quale espressione della cultura del tempo, pienamente incarnata nelle specifiche esigenze dell’architettura militare. In particolare nel saggio è studiata la chiesa dei Santi Filippo e Giacomo, con i suoi restaur…
Architettura religiosa nei normanni di Sicilia e la fruizione e valorizzazione della chiesa dei Santi Filippo e Giacomo nel castello di Maredolce a P…
2014
Il poster riporta i contenuti del mio intervento al convegno “Fortificazione, memoria, paesaggio”, promosso in occasione dei Cinquant’anni di attività dell’Istituto Italiano dei Castelli, onlus, 1964-2014. Bologna 27-29 novembre 2014. Il convegno è stato organizzato dall’Istituto Italiano dei Castelli Onlus, dal Dipartimento di Storia Culture Civiltà Alma Matere Studiorum – Università di Bologna. Il saggio indaga l’architettura religiosa presente nei castelli normanni di Sicilia, quale espressione della cultura del tempo, pienamente incarnata nelle specifiche esigenze dell’architettura militare. In particolare nel saggio è studiata la chiesa dei Santi Filippo e Giacomo, con i suoi restauri …
A Novel Technique Using Polytetrafluoroethylene Tape to Solve Screw Loosening Complication in Implant-Supported Single Crowns
2020
This study aimed to analyze a novel technique to make screws with greater untightening resistance and to solve screw loosening in implant-supported single crowns. Thirty grade IV titanium straight abutments were screwed onto 30 external hex implants using grade IV titanium screws (30 Ncm). They were exposed to cyclic loading (300,000 cycles, 200 N). Samples were divided into 4 groups (15 samples per group): new screws (SCREW group) (control), reused screws (rSCREW group), new screws wrapped with polytetrafluoroethylene (PTFE) tape (PTFE group), and reused screws wrapped with PTFE tape (rPTFE group). Reverse torque values (RTVs) were recorded with a digitally calibrated implant motor. Mean R…
Nuclear DFT electromagnetic moments in heavy deformed open-shell odd nuclei
2022
Within the nuclear DFT approach, we determined the magnetic dipole and electric quadrupole moments for paired nuclear states corresponding to the proton (neutron) quasiparticles blocked in the p11/2- (n13/2+) intruder configurations. We performed calculations for all deformed open-shell odd nuclei with 63<=Z<=82 and 82<=N<=126. Time-reversal symmetry was broken in the intrinsic reference frame and self-consistent shape and spin core polarizations were established. We determined spectroscopic moments of angular-momentum-projected wave functions and compared them with available experimental data. We obtained good agreement with data without using effective g-factors or effective c…
Charm and hidden charm scalar mesons in the nuclear medium
2009
We study the renormalization of the properties of low-lying charm and hidden charm scalar mesons in a nuclear medium, concretely of the D-s0(2317) and the theoretical hidden charm state X(3700). We find that for the D-s0(2317), with negligible width at zero density, the width becomes about 100 MeV at normal nuclear-matter density, while in the case of the X(3700) the width becomes as large as 200 MeV. We discuss the origin of this new width and trace it to reactions occurring in the nucleus, while offering a guideline for future experiments testing these changes. We also show how those medium modifications will bring valuable information on the nature of the scalar resonances and the mechan…
The electronics of the energy plane of the NEXT-White detector
2019
[EN] This paper describes the electronics of NEXT-White (NEW) detector PMT plane, a high pressure xenon TPC with electroluminescent amplification (HPXe-EL) currently operating at the Laboratorio Subterraneo de Canfranc (LSC) in Huesca, Spain. In NEXT-White the energy of the event is measured by a plane of photomultipliers (PMTs) located behind a transparent cathode. The PMTs are Hamamatsu R11410-10 chosen due to their low radioactivity. The electronics have been designed and implemented to fulfill strict requirements: an overall energy resolution below 1% and a radiopurity budget of 20 mBq unit(-1) in the chain of Bi-214. All the components and materials have been carefully screened to assu…