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

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

Management and use of filter masks in the “none-medical” population during the Covid-19 period

Abstract SARS-CoV-2 has become a pandemic disease declared by the World Health Organization, consequently each nation has taken a series of actions managed by the government in order to prevent the spread of this dangerous virus. The most common countermeasure is the use of a mask that should cover the mouth and nose to filter the inhaled and exhaled air. Those masks are medical devices that should be handled properly; unfortunately in our study, observation of the population during the so-called “phase 2″ has very often shown an inappropriate use of any type of mask which reduces its effectiveness. The correct dissemination of adequate information on how to use the mask and the strict cont…

Il substrato dentinale lungo il post-space prima della cementazione adesiva dei perni in fibra

Obiettivi: nel seguente lavoro è stata valutata la morfologia delle superfici dentinali lungo il post-space, subito prima delle fasi connesse con la cementazione adesiva, per verificare le modificazioni indotte dalle procedure che "routinariamente" si effettuano per renderlo idoneo all'adesione di un perno in fibra, durante la preparazione meccanica del post-space ed il condizionamento del sub strato dentinale. Metodi: su 20 elementi dentali monoradicolati, estratti e divisi in 2 gruppi trattati endodonticamente con strumenti in NiTi e con due diversi protocolli di irrigazione , sono stati preparati , con frese calibrate gli alloggiamenti per il perno in fibra. Le superfici lungo il post sp…

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…

In vitro evaluation of antibacterial activity of a dental adhesive incorporating the antibacterial agent MDPB

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

Xerostomia induced by radiotherapy: an overview of the physiopathology, clinical evidence, and management of the oral damage

Background: The irradiation of head and neck cancer (HNC) often causes damage to the salivary glands. The resulting salivary gland hypofunction and xerostomia seriously reduce the patient’s quality of life. Purpose: To analyze the literature of actual management strategies for radiation-induced hypofunction and xerostomia in HNC patients. Methods: MEDLINE/PubMed and the Cochrane Library databases were electronically evaluated for articles published from January 1, 1970, to June 30, 2013. Two reviewers independently screened and included papers according to the predefined selection criteria. Results: Sixty-one articles met the inclusion criteria. The systematic review of the literature sugge…

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…

Trattamento ultrasonico delle superfici dentinali lungo il post space

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 …

Assessment of gutta-percha adaptation with different root canal obturation techniques.

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

USE OF A NEW SYSTEM FOR ROOT CANAL PREPARATION: Ni-Ti ROTATING INSTRUMENTS FLEXMASTER.

Attività antibatterica di un adesivo smalto-dentinale: valutazione della diffusione del monomero MDPB

Attività antibatterica di un cemento endodontico contenente ortofenilfenolo: valutazione comparativa in vitro mediante direct contact test.

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

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

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

Ultrasound Effects after Post Space Preparation: An SEM Study

The aim of this study was to evaluate the effect of ultrasonic treatment on occlusion of dentine tubules in root canal walls after post space preparation in endodontically treated teeth. Twenty-four premolars were instrumented and filled using warm vertical condensation; after post space preparation, they were divided into two groups. The control group was treated using the etching procedure. The experiment samples were treated with EDTA irrigation and ultrasound activation for 30 s before the etching procedure. The roots were divided and the canal walls were examined under SEM at 1000x magnification. The debris and open tubule marks were observed at 2, 6, and 10 mm levels using a three-ste…

Guttaperca e Resilon studia in vitro sulla capacità di diffusione.

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

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

Valutazione della capacità di taglio degli strumenti M-two

Valutazione in vitro dell’affaticamento di strumenti rotanti in nichel-titanio

Riassunto Obiettivo L’obiettivo di questo lavoro e quello di valutare, in vitro, la fatica ciclica di ProFile, K3 e Twisted File, strumenti rotanti in nichel-titanio, in canali radicolari simulati aventi angoli di curvatura di 45°, 60° e 90°. Materiali e metodi Per effettuare questo studio sono stati utilizzati: 18 file 25/.06 ProFile; 18 file 25/.06 K3; 18 file 25/.06 Twisted File. La resistenza a fatica ciclica degli strumenti rotanti Ni-Ti e stata testata ad angolazioni di 45°, 60° e 90° mediante un modello sperimentale creato specificatamente. Risultati e conclusioni Dall’analisi dei dati e emersa una buona resistenza alla fatica ciclica per quanto concerne le sistematiche ProFile e Twi…

Surface debris of canal walls after post space preparation in endodontically treated teeth: A scanning electron microscopic study

Abstract Purpose To evaluate surface cleanliness of root canal walls along post space after endodontic treatment using 2 different irrigant regimens, obturation techniques, and post space preparation for adhesive bonding. Study design Forty teeth, divided into 4 groups, were instrumented, using Ni-Ti rotary files, irrigated with NaOCl or NaOCl + EDTA and obturated with cold lateral condensation (CLC) or warm vertical condensation (WVC) of gutta-percha. After post space preparation, etching, and washing procedure, canal walls were observed using a scanning electron microscope (SEM). Amount of debris, smear layer, sealer/gutta-percha remnants, and visibility of open tubules were rated. Result…

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&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…

Evaluation of two different endodontic filling materials and their adaptation to the canal walls using System B.

Permanence of Modifications in Oral Microcirculation in Ex-Smokers.

Background: The aim of this study was to assess the long-term effects of smoking and to investigate the permanence of this damage to the oral microcirculation. Material/Methods: We recruited 75 patients and divided them into 3 groups: group 1 was composed of 25 healthy non-smokers, group 2 was composed of 25 healthy current smokers, and group 3 was composed of 25 healthy ex-smokers. Video-capillaroscopic examination was performed on all patients. The video-capillaroscopic investigation was performed on patients in sitting position, always with the same light source, at the same room temperature (23°C), in the morning, with the same operator (GAS), and was repeated many times for every area …

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

Current dental adhesives systems. A narrative review.

Adhesive dentistry is based on the development of materials which establish an effective bond with the tooth tissues. In this context, adhesive systems have attracted considerable research interest in recent years. Successful adhesive bonding depends on the chemistry of the adhesive, on appropriate clinical handling of the material as well as on the knowledge of the morphological changes caused on dental tissue by different bonding procedures. This paper outlines the status of contemporary adhesive systems, with particular emphasis on chemical characteristics and mode of interaction of the adhesives with enamel and dentinal tissues. Dental adhesives are used for several clinical application…

Innovations in endodontic filling materials

One of the goals of endodontic treatment is to achieve a complete, tridimensional, hermetic sealing of the root canal system to prevent the entry of microorganisms or their products through both the coronal and apical pathways. Gutta-percha is the most widely used material for root canal filling and despite its numerous properties, such as biocompatibility and thermoplasticity, it has however an important limit: the lack of adhesion to the canal walls. Attempts to address this problem have been made over the years by using endodontic cements capable of bonding to canal dentine but their tendency to resorption in time can compromise the quality of treatment. The first step towards a real adh…

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…

Compositi "Low Shrinkage": valutazione clinica a 18 mesi

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

Ultrasound effects after post space preparation: a SEM investigation

The aim of this study was to evaluate the effect of ultrasonic treatment on occlusion of dentine tubules in root canal walls after post space preparation in endodontically treated teeth. Twenty-four premolars were instrumented and filled using warm vertical condensation; after post space preparation, they were divided into two groups. The control group was treated using the etching procedure. The experiment samples were treated with EDTA irrigation and ultrasound activation for 30 s before the etching procedure. The roots were divided and the canal walls were examined under SEM at 1000x magnification. The debris and open tubule marks were observed at 2, 6, and 10 mm levels using a three-ste…

Comparazione in vitro tra Guttaflow e System B.

Alternative Methods of Sterilization in Dental Practices Against COVID-19

SARS-CoV-2, and several other microorganisms, may be present in nasopharyngeal and salivary secretions in patients treated in dental practices, so an appropriate clinical behavior is required in order to avoid the dangerous spread of infections. COVID-19 could also be spread when patients touches a contaminated surface with infected droplets and then touch their nose, mouth, or eyes. It is time to consider a dental practice quite similar to a hospital surgery room, where particular attention should be addressed to problems related to the spreading of infections due to air and surface contamination. The effectiveness of conventional cleaning and disinfection procedures may be limited by seve…

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

A COMPARATIVE STUDY OF TWO ROOT CANAL FILLING MATERIALS: GUTTA-PERCHA Vs. RESILON™.

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

In vitro antibacterial activity of endodontic sealers

Summary Objectives To evaluate the antibacterial activity of four endodontic sealers: one epoxy resin sealer (AH Plus), two zinc oxide eugenol (ZOE)-based sealers (Endomethasone, Pulp Canal Sealer), and one sealer containing both ZOE and orthophenilphenol (Vcanalare). Methods A direct contact test (DCT) was performed. A 10 μl suspension of Enterococcus faecalis was placed on the test material 20 min, 24 h and 7 days after mixing. Bacteria were allowed to directly contact the sealers for 1 h at 37 °C. Bacterial growth was then spectrophotometrically measured every 30 min for 7 h, and again after 24 h as well. Results All freshly mixed sealers showed complete inhibition of bacterial growth. S…

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.

Conservative Surgical Treatment of Bisphosphonate-Related Osteonecrosis of the Jaw with Er,Cr:YSGG Laser and Platelet-Rich Plasma: A Longitudinal Study

Introduction. The management of bisphosphonate-related osteonecrosis of the jaw (BRONJ), with no evidence-based guidelines, remains controversial. We aimed to evaluate the efficiency of a conservative surgical treatment combining Er,Cr:YSGG laser and platelet-rich plasma (PRP) for the treatment of BRONJ in cancer patients. Methods. We performed a longitudinal cohort study. Inclusion criteria were (1) age ≥ 18 years; (2) cancer diagnosis; (3) treatment with NBP because of the underlying cancer. Results. We consecutively recruited ten patients diagnosed with BRONJ in stage I or II. These patients underwent a surgical laser-assisted therapy together with autologous PRP. At the latest follow-up…

Compositi low shrinkage: valutazione clinica a 18 mesi

Trattamento ultrasonico delle superfici dentinali lungo il "post space"