VALUTAZIONE IN VITRO DELLA VARIAZIONE DELLA VISCOSITA' DEL RESILON IN FUNZIONE DELLA TEMPERATURA

Effectiveness of a new method of disinfecting the root canal, using Er, Cr:YSGG laser to kill Enterococcus faecalis in an infected tooth model.

Some lasers have demonstrated to provide effective disinfection when used as adjunctive device to the conventional treatment. The aim of this in vitro study was to determine the effectiveness of the erbium, chromium:yttrium scandium gallium garnet (Er, Cr:YSGG) laser by measuring its bactericidal effect inside the root canal experimentally colonized with Enterococcus faecalis. The laser was tested at different irradiation times (30 and 60 s) and energy of impulses (75 and 25 mJ). A total of 52 single-rooted extracted human teeth were endodontically prepared with rotary instrumentation. All were sterilized and inoculated with a suspension of E. faecalis (105 bacteria/ml). The teeth were rand…

Analisi qualitativa della capacità di taglio di due strumenti in Ni-Ti di nuova generazione.

Freeze-out radii extracted from three-pion cumulants in pp, p–Pb and Pb–Pb collisions at the LHC

In high-energy collisions, the spatio-temporal size of the particle production region can be measured using the Bose-Einstein correlations of identical bosons at low relative momentum. The source radii are typically extracted using two-pion correlations, and characterize the system at the last stage of interaction, called kinetic freeze-out. In low-multiplicity collisions, unlike in high-multiplicity collisions, two-pion correlations are substantially altered by background correlations, e.g. mini-jets. Such correlations can be suppressed using three-pion cumulant correlations. We present the first measurements of the size of the system at freeze-out extracted from three-pion cumulant correl…

Valutazione delle Temperature raggiunte dal Sistema E&Q Master tramite l’utilizzo di termocoppie

INTRODUZIONE: Uno degli obiettivi del trattamento endodontico è l’otturazione tridimensionale del sistema dei canali radicolari. Un inadeguato sigillo dell’apice e un’incompleta otturazione canalare potrebbe essere la causa di disturbi post-trattamento. La guttaperca è il più comune materiale da otturazione usato e viene comunemente utilizzata in associazione con il cemento canalare. Sono da preferire tecniche che prevedono quantità minime di cemento, come la condensazione verticale a caldo. Questa tecnica implica l’uso di una sorgente di calore, come il sistema E&Q Master, che serve a termoplasticizzare la guttaperca. SCOPO DEL LAVORO: Valutare in vitro, mediante termocoppie, gli increment…

Measurement of PromptD-Meson Production inp−PbCollisions atsNN=5.02  TeV

The p_{T}-differential production cross sections of the prompt charmed mesons D^{0}, D^{+}, D^{*+}, and D_{s}^{+} and their charge conjugate in the rapidity interval -0.96<y_{cms}<0.04 were measured in p-Pb collisions at a center-of-mass energy sqrt[s_{NN}]=5.02 TeV with the ALICE detector at the LHC. The nuclear modification factor R_{pPb}, quantifying the D-meson yield in p-Pb collisions relative to the yield in pp collisions scaled by the number of binary nucleon-nucleon collisions, is compatible within the 15%-20% uncertainties with unity in the transverse momentum interval 1<p_{T}<24 GeV/c. No significant difference among the R_{pPb} of the four D-meson species is observed. The results…

DEVELOPMENT AND INITIAL VALIDATION OF THE SYSTEMIC JADAS, A NEW COMPOSITE DISEASE ACTIVITY SCORE FOR SYSTEMIC JUVENILE IDIOPATHIC ARTHRITIS

Background: Juvenile Arthritis Disease Activity Score (JADAS) has gained increasing popularity for the measurement of the level of disease activity in patients with juvenile idiopathic arthritis (JIA). However, so far the JADAS has been validated only in children with the non-systemic categories of JIA. Objectives: To develop and validate the systemic JADAS (sJADAS), a new version of the JADAS specific to systemic JIA (sJIA). Methods: The sJADAS is made up by adding a fifth item, named Systemic Manifestation Score (SMS), to the four items included in the original tool (physician global assessment of disease activity, parent/patient global assessment of well-being, active joint count and ery…

J/ψ suppression at forward rapidity in Pb–Pb collisions at sNN=5.02 TeV

The inclusive J/$\psi$ production has been studied in Pn-Pb and pp collisions at the centre-of-mass energy per nucleon pair $\sqrt{s_{\rm NN}}=5.02$ TeV, using the ALICE detector at the CERN LHC. The J/$\psi$ meson is reconstructed, in the centre-of-mass rapidity interval $2.5<y<4$ and in the transverse-momentum range $p_{\rm T}<12$ GeV/$c$, via its decay to a muon pair. In this Letter, we present results on the inclusive J/$\psi$ cross section in pp collisions at $\sqrt{s}=5.02$ TeV and on the nuclear modification factor $R_{\rm AA}$. The latter is presented as a function of the centrality of the collision and, for central collisions, as a function of the transverse momentum $p_{\rm T}$ of…

Assessment of root canal enlargement using Mtwo and BioRace rotary files.

Objective. To evaluate root canal enlargement following mechanical shaping using 2 nickel titanium rotary systems.Material and Methods. Forty single-rooted teeth were immersed in resin and sectioned perpendicular to the long axis at 4, 8, and 12 mm from the apex. Digital capture of sections was performed before and after canal instrumentation using Mtwo and BioRace instruments. The area increase of endodontic space was calculated by subtraction.Results. The use of both instruments has allowed the removal of great amounts of dentin from the canal walls, even when the endodontic morphology is characterized by awkwardness to reach recesses.Conclusions. Both procedures seem to be valid and no d…

Studio “In vitro” sulla capacità di diffusione della guttaperca termoplasticizzata: System B vs Endotwinn.

INFLUENZA DI DIFFERENTI SPESSORI DENTINALI SULLA PROPAGAZIONE DEL CALORE LUNGO LA SUPERFICIE RADICOLARE

STUDIO "IN VITRO" SULLA CAPACITA' DI DIFFUSIONE DELLA GUTTAPERCA UTILIZZANDO TRE DIVERSI SISTEMI DI OTTURAZIONE CANALARE A CALDO

INCREMENTI TERMICI IN VITRO UTILIZZANDO DUE DIVERSI SISTEMI DI OTTURAZIONE CANALARE A CALDO: SISTEMA E&Q VS SYSTEM B

OBIETTIVO DELLA RICERCA: Una delle più comuni cause di insuccesso in Endodonzia è certamente rappresentata dall’incompleta otturazione del sistema dei canali radicolari, in tal senso, un materiale da otturazione canalare dovrebbe penetrare e diffondere in modo omogeneo in tutto lo spazio endodontico. La guttaperca è il più comune materiale da otturazione usato e viene comunemente utilizzata in associazione con il cemento canalare. Sono da preferire tecniche che prevedono quantità minime di cemento, come la condensazione verticale a caldo. L’originale tecnica di compattazione verticale a caldo è stata modificata da Buchanan che ha introdotto la tecnica dell’onda continua di condensazione med…

System B, Endo-Twinn and E-Fill. True temperatures inside the canal

Background: The aim of this study is to verify the variations of the temperature inside the root canal with three different gutta-percha heating systems. Materials and Methods: A split-tooth model was built with a lateral groove at 3.5-mm from working length (WL) in order to insert a Chromel-Alumel K-type thermocouple placed in contact with gutta-percha. The thermocouple was connected to a digital thermometer. Sixty obturations were made with medium gutta-percha points. For 20 specimens the System B was used with the Buchanan fine plugger and the temperature was set at 200°C; for other 20 specimens the Endo-Twinn with a fine plugger was used and for the last 20 specimens we used the E-Fill …

Azimuthal anisotropy ofD-meson production in Pb-Pb collisions atsNN=2.76TeV

The production of the prompt charmed mesons D0, D+, and D*+ relative to the reaction plane was measured in Pb-Pb collisions at a center-of-mass energy per nucleon-nucleon collision of √sNN=2.76TeV with the ALICE detector at the CERN Large Hadron Collider. D mesons were reconstructed via their hadronic decays at central rapidity in the transverse-momentum (p_T) interval 2–16 GeV/c. The azimuthal anisotropy is quantified in terms of the second coefficient v2 in a Fourier expansion of the D-meson azimuthal distribution and in terms of the nuclear modification factor R_AA, measured in the direction of the reaction plane and orthogonal to it. The v2 coefficient was measured with three different …

GUTTAPERCA E RESILON STUDIO IN VITRO SULLA CAPACITA' DI DIFFUSIONE

Effects of two Ni-Ti preparation techniques on root canal geometry assessed by electronically profiling the endodontic space

Measurement of electrons from semileptonic heavy-flavor hadron decays inppcollisions ats=2.76  TeV

The pT-differential production cross section of electrons from semileptonic decays of heavy-flavor hadrons has been measured at midrapidity in proton-proton collisions at s=2.76TeV in the transverse momentum range 0.5<pT<12GeV/c with the ALICE detector at the LHC. The analysis was performed using minimum bias events and events triggered by the electromagnetic calorimeter. Predictions from perturbative QCD calculations agree with the data within the theoretical and experimental uncertainties.

Sea urchin cells and embryos as tools for bio-monitoring studies.

Biotecnologie e monitoraggio ambientale: sviluppo e applicazione di biomarcatori molecolari.

Multi-particle azimuthal correlations in p-Pb and Pb-Pb collisions at the CERN Large Hadron Collider

Measurements of multi-particle azimuthal correlations (cumulants) for charged particles in p-Pb and Pb-Pb collisions are presented. They help address the question of whether there is evidence for global, flow-like, azimuthal correlations in the p-Pb system. Comparisons are made to measurements from the larger Pb-Pb system, where such evidence is established. In particular, the second harmonic two-particle cumulants are found to decrease with multiplicity, characteristic of a dominance of few-particle correlations in p-Pb collisions. However, when a $|\Delta \eta|$ gap is placed to suppress such correlations, the two-particle cumulants begin to rise at high-multiplicity, indicating the prese…

Changes in the morphology of sea urchin embryos exposed during specific stages of development to 50 Hz electric and magnetic fields

Variazioni della temperatura intracanalare e lungo la superficie radicolare durante l’uso del il System B

Anisotropic flow of charged hadrons, pions and (anti-)protons measured at high transverse momentum in Pb–Pb collisions at sNN=2.76 TeV

The elliptic, v(2), triangular, v(3), and quadrangular, v(4), azimuthal anisotropic flow coefficients are measured for unidentified charged particles, pions, and (anti-)protons in Pb-Pb collisions at root S-NN = 2.76 TeV with the ALICE detector at the Large Hadron Collider. Results obtained with the event plane and four-particle cumulant methods are reported for the pseudo-rapidity range vertical bar eta vertical bar 8 GeV/c. The small p(T) dependence of the difference between elliptic flow results obtained from the event plane and four-particle cumulant methods suggests a common origin of flow fluctuations up to p(T) = 8 GeV/c. The magnitude of the (anti-)proton elliptic and triangular flo…

Confronto tra due sistemi di otturazione canalare System B vs E-Fill

Mass transfer and hydrodinamic characteristics of a high aspect ratio self-ingesting reactor for gas-liquid operations

Abstract The mass transfer performance of a gas–liquid self-ingesting stirred reactor is reported both for coalescing and non-coalescing systems. The vessel features are a high aspect ratio and a rather narrow multiple-impeller draft tube, through which the gas phase is ingested and led down to the vessel bottom, where it is finely dispersed into the liquid rising in the annular portion of the vessel. Comparison is made between k L a values determined by several variants of the dynamic method, among which pure oxygen absorption in a previously de-gassed liquid phase. Results show that the gas–liquid mass transfer coefficient values obtained with the last approach are remarkably larger than …

Valutazione in vitro dell'efficacia di strumenti in NiTi con capacità di taglio laterale

Guttaperca e Resilon studia in vitro sulla capacità di diffusione.

Guttaperca e Resilon™: studio “In vitro” sulla capacità di diffusione in funzione della temperatura

Jet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeV

Physics letters / B B763, 238 - 250 (2016). doi:10.1016/j.physletb.2016.10.048

SHAPING OF M-TWO NICKEL-TITANIUM FILES IN STRAIGHT ROOT CANALS

Valutazione della capacità di taglio degli strumenti M-two

Multiplicity dependence of jet-like two-particle correlation structures in p–Pb collisions at sNN=5.02 TeV

Two-particle angular correlations between unidentified charged trigger and associated particles are measured by the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. The transverse-momentum range 0.7<pT,assoc<pT,trig<5.0 GeV/c is examined, to include correlations induced by jets originating from low momentum-transfer scatterings (minijets). The correlations expressed as associated yield per trigger particle are obtained in the pseudorapidity range |η|<0.9. The near-side long-range pseudorapidity correlations observed in high-multiplicity p-Pb collisions are subtracted from both near-side short-range and away-side correlations in order to remove the no…

VALUTAZIONE DELLA CAPACITA' DI TAGLIO LATERALE DI STRUMENTI AL NI-TI IN CANALI A DIVERSO GRADO DI CURVATURA

Increases of intracanal and root surface temperatures during the obturation of canal using the E&amp;Q master system and the system

Objectives: The purpose of our study is to assess the increases of intracanal and root surface temperatures during the obturation of canal system using the E&Q Master System and the System B. Materials and methods: A split-tooth model was built. To measure the temperature, 6 grooves for the placement of thermocouples were made in the buccal half of the model. On the mesial side, three grooves were made at 2, 4 and 6 mm from the anatomical apex and were extended to the root surface, while on the distal side three grooves were made at 2, 4 and 6 mm up to the intracanal portion. In each of these grooves was inserted a type T thermocouple (Copper-Costantana) with a diameter of 0.076 mm. 40 cana…

Valutazione termografica a infrarossi lungo la superficie radicolare durante la tecnica dell’onda continua di condensazione

INTRODUZIONE: La tecnica dell’onda continua di condensazione è stata ampiamente descritta in letteratura e in particolare sono molti i lavori che si sono occupati di stabilire le temperature sviluppate lungo la superficie radicolare durante la realizzazione di tale tecnica. Hussey et al.(1997) per la prima volta hanno utilizzato la termografia a infrarossi per determinare le temperature raggiunte lungo la superficie radicolare. Questa è un indagine non invasiva che ci consente di avere e registrare una mappatura termica lungo l’intera superficie radicolare. SCOPO DEL LAVORO: Scopo di questo studio è una valutazione termografica a infrarossi sull’incremento della temperatura lungo la superfi…

Valutazione computerizzata del post-space in due sistemi di perni endodontici

LA TEMPERATURA INTRACANALARE UTILIZZANDO TRE DIVERSI SISTEMI DI OTTURAZIONE CANALARE A CALDO

Scopo di questo studio è valutare, in vitro, la variazione della temperatura raggiunta all’interno di un canalare radicolare utilizzando tre diverse tecniche di compattazione della guttaperca a caldo. Materiali e Metodi: E’ stato realizzato un modellino sperimentale definito “split-tooth model”. Nella dentina canalare è stato creato un solco e una depressione laterale a 3,5 mm dalla lunghezza di lavoro (WL) all’interno della quale è stata piazzata un termocoppia in cromo-alluminio di tipo K connessa a un termometro digitale e posta a diretto contatto con la guttaperca. Sono state effettutate 60 otturazioni usando coni di guttaperca non standardizzati (Medium), 20 utilizzando il System B, se…

Cambiamenti della temperatura all'interno della guttaperca indotti dal System B

SCOPO DEL LAVORO: Lo scopo della ricerca è valutare la trasmissione di calore nella massa di guttaperca indotta dal System B durante la tecnica dell’onda continua di condensazione. MATERIALI E METODI: E’ stato realizzato un modello sperimentale definito “split-tooth model”. Nella resina e nella dentina sono stati creati 3 solchi perpendicolari all’asse lungo del dente a 2 mm (point A) e a 4 mm (point B) e 6 mm (point C) dall’apice dell’elemento dentario inglobato, all’interno dei quali sono state posizionate 3 termocoppie in cromo-alluminio di tipo K connesse a un termometro digitale a diretto contatto con la guttaperca. Sono state effettuate 20 otturazioni con coni di guttaperca non standa…

Increases of intracanal and root surface temperatures during the obturation of canal using the E&Q master system and the system B

Systéme d'informations Régional des transport - Contribution de synthése de la région Sicile

Incremento termico sulla superficie radicolare durante l'uso del System B

Incremento della temperatura lungo la superficie radicolare durante la tecnica dell’onda continua di condensazione

INTRODUZIONE: Le temperature raggiunte degli strumenti portatori di calore, durante la condensazione a caldo della guttaperca, sono molto elevate. Ciò potrebbe rappresentare una fonte di danno iatrogeno a livello delle strutture parodontali sottoposte ad un eccessivo stress termico. SCOPO DEL LAVORO: Valutazione termografica a infrarossi dell’incremento della temperatura lungo la superficie radicolare, durante la tecnica dell’onda continua di condensazione. MATERIALI E METODI: Venti incisivi laterali mascellari, estratti per motivi parodontali, sono stati selezionati e alesati con M-two. In tutti i campioni è stata eseguita un’otturazione canalare mediante coni di guttaperca non standardizz…

VALUTAZIONE COMPUTERIZZATA DEL POST-SPACE IN DUE SISTEMI DI PERNI ENDODONTICI: A DOPPIA CONICITA' E A CONICITA' PROGRESSIVA ISO .02

Centrality dependence of particle production inp−Pbcollisions atsNN=5.02TeV

We report measurements of the primary charged-particle pseudorapidity density and transverse momentum distributions in p-Pb collisions at root s(NN) = 5.02 TeV and investigate their correlation with experimental observables sensitive to the centrality of the collision. Centrality classes are defined by using different event-activity estimators, i.e., charged-particle multiplicities measured in three different pseudorapidity regions as well as the energy measured at beam rapidity (zero degree). The procedures to determine the centrality, quantified by the number of participants (N-part) or the number of nucleon-nucleon binary collisions (N-coll) are described. We show that, in contrast to Pb…

Termografia computerizzata a infrarossi delle temperature generate usando il System B lungo la superficie radicolare

Valutazione in vitro della variazione della viscosità del Resilon™ in funzione della temperatura.