Papers by Nicola Barabanti
oral health and dental management, May 28, 2014
Dental Materials, 2014
Purpose:To investigate the effect of thermocycling on bond strength of two dual-curing composites... more Purpose:To investigate the effect of thermocycling on bond strength of two dual-curing composites, used in the adhesive cementation of posts, as a function of the distance from the CEJ. Methods and materials: 24 single-rooted teeth recently extracted for periodontal reasons were cut at the CEJ, endodontically treated and a 8-mmdeep post spacewasmade in each specimen. For the test a single kind of composite fiberreinforced post was chosen: Relyx Fiber Post size 2. Teethwere randomly split into two groups (n=12), and posts were luted using two resin composites: Multilink Automix (group A – control) and RelyX Unicem 2 Automix (group B – self-adhesive). The composite was cured for 120 s with a 400mW/cm2 light curing unit. The samples were subjected to thermocycling (5000 cycles in distilled water, 5–55 ◦C, with a dwell time of 30 s in each). Than samples were cut, perpendicularly to the long axis, in 2mm-thick slices starting from the CEJ to the apex. Subsequently the sections corresponding to 1mm, 3mm, 5mm underwent a push-out test to evaluate the resistance to the displacement of the post. Results: The statistical analysis (ANOVA, Tukey’s, p<0.05) of the data obtained from the push-out test shows that the bonding strength of group B is significantly greater than group A in all sections analyzed. No statistically significant difference was found between the bond strength of the tested materials and the distance from the CE. Conclusion: The bonding strength, after thermocycling, of RelyX Unicem 2 has proven to be statistically higher if compared to Multilink; Materials analyzed, after being subjected to thermocycling, have not shown values of adhesion strength significantly different in relation to the distance of the section from the CEJ.
iranian endodontic journal, 2023
Introduction: The present study aimed to compare the capability of two single-file shaping system... more Introduction: The present study aimed to compare the capability of two single-file shaping systems in disinfecting and cleaning long oval root canals. Materials and methods: Fifty single-rooted teeth were prepared, contaminated with Enterococcus faecalis and divided into two groups. Two samplings were obtained; S1 before chemo-mechanical preparation and S2 after the preparation. Depending on the group, chemo-mechanical preparation was performed with XP-endo Shaper (XPS) and Wave One Gold (WOG). Five teeth from each group were observed under scanning electron microscopy (1000×) to evaluate the cleanliness of root canals at 3, 6 and 9 mm from the apex. All probability (P-values) were two-tailed, statistical significance was set at 0.05 and analyses were conducted using SPSS statistical software. Results: A significant reduction in the colony forming units was observed from S1 to S2 in both tested groups. In S2, XPS group obtained significantly lower colony forming units (P&lt;0.001). In the cleanliness study, XPS group resulted in significantly cleaner canals compared to WOG. Conclusions: Based on this in vitro study XPS system was more effective in disinfecting and cleaning long oval canals.
Dental Materials, 2014
The aim of this study was to microbiologically compare the surface of class V restorations perfor... more The aim of this study was to microbiologically compare the surface of class V restorations performed with microhybrid composite resin or flowable composite resin, over 48 months, in order to determine an increased risk of secondary caries. Methods & Materials: 36 class V restorations were performed according to a standardized method, in order to asses if the different composite materials had changed the microbiological pattern on the restoration's surface. Samples were collected over 48 months from the execution of the restoration, to evaluate the incidence of time on the growth of S. mutans, in correspondence of four different composite resins (two microhybrid and two flowable composite resins). Samples were managed with sterile paper points, withdrawing localized plaque on the margin of the restoration, then kept frozen in saline solution. For each tooth with class V restoration a control sample was taken from an healthy element, to analyze the relationship between presence of S. mutans and restoration. Samples were processed according to the method of PCR-Realtime, to find and quantify S. mutans. For restorations were used 2 microhybrid composite resins, Venus Diamond (Heraeus Kulzer) and Ceram-x (Dentsply) and 2 flowable resins,Tetric Evoflow (Ivoclar Vivadent) and Venus Diamond flow (Heraeus Kulzer). Results: Flowable composite resins show an increased capability of creating a suitable substrate to bacterial growth, probably because of the surface porosity that this resin develops in time, caused by imbibitions of the organic matrix. The highest quantity of bacterial flora was found on restorations performed with flowable resin; also the highest relative quantity of S. mutans was found on the same kind of restoration. Conclusion: Flowable composite resins seem to offer a better substrate to bacterial growth in general; data obtained can state that there's an increased growth of S. mutans in correspondence of restorations performed with flowable composite resin.
The journal of adhesive dentistry, 2020
PURPOSE This randomized, split-mouth clinical study evaluated the marginal quality of direct clas... more PURPOSE This randomized, split-mouth clinical study evaluated the marginal quality of direct class-I and class-II restorations made of microhybrid composite that were applied using two polymerization protocols and two marginal evaluation criteria. MATERIALS AND METHODS A total of 50 patients (mean age: 33 years) received 100 direct class-I or class-II restorations in premolars or molars. Three calibrated operators made the restorations. After conditioning the tooth with 2-step etch-and-rinse adhesive, restorations were made incrementally using microhybrid composite. Each layer was polymerized using a polymerization device operated either in regular mode (600-650 mW/cm2 for 20 s) (RM) or high-power (1200-1300 mW/cm2 for 10 s) mode (HPM). Two independent, calibrated operators evaluated the restorations 1 week (baseline) and 6 months after restoration placement, and thereafter annually up to 10 years using modified USPHS and SQUACE criteria. Data were analyzed using the Mann-Whitney U-...
Objective: The aim of this study is to evaluate the influence of different mixing procedures and ... more Objective: The aim of this study is to evaluate the influence of different mixing procedures and application methods on fibre post adaptation quality. Methods: Forty freshly extracted mono-radicular teeth (n=40) were endodontically treated and randomly divided into three groups. Posts (RelyX Fiber Post - 3M ESPE) were cemented respectively with two different self-adhesive luting composites: RelyX Unicem (3M ESPE) and the new iCem (Heraeus). In group A Relyx Unicem Aplicap (3M Espe, USA) mixed by RotoMix (3M Espe) and applied in the root canal using the Elongation Tip was used. In group B Relyx Unicem Clicker (3M Espe, USA), following the manufacturer's instructions for mixing, was applied using the Centrix system (Needle Tube 20 Ga). Group C - iCEM (Heraeus) was mixed using automixing tip, then applied using the Centrix system (Needle Tube 20 Ga). Teeth were then thermocycled according to the ISO/TR 11405 protocol and immersed for 24 hours in a 2% methylene-blue solution. Each t...
50 P conservativa z PAROLE CHIAVE: dente trattato endodonticamente, perno in fibra, sistema rotan... more 50 P conservativa z PAROLE CHIAVE: dente trattato endodonticamente, perno in fibra, sistema rotante/reciprocante, tavola sinottica. z KEY WORDS: endodontically treated tooth, fiber post system, rotating / recip-rocating, synoptic tables P Summary The scientific literature shows that a tooth endodontically treated differs from a normal tooth. The changes affect the chemical, physical and elastic properties of the dentin, the resistance to fatigue, the morphology and bio-mechanical behavior. Nevertheless survival of a tooth endodontically treated is influenced so much greater the quantity and quality of remaining tooth structure. The removal of decayed tissue and tooth preparation for endodontic treatment are therefore the first factors which weaken the structure of the tooth. The tooth endodontically treated may require complex strategies of restoration and a vision of multidisciplinary treatment. There are situations for which the choice to insert a fiber post is crucial to support ...
Throughout the Nov-07/Jan-08 time period, 60 class-V restorations have been performed. In order t... more Throughout the Nov-07/Jan-08 time period, 60 class-V restorations have been performed. In order to be part of the study, every patient was to need at least 2 restorations on vital teeth, which had to be located on opposite quadrants of the oral cavity. All the restorations were made with micro-layering technique using Swiss Master Light (EMS) curing light (800 mW/cm 2 for 20s). The test groups were randomly assigned to the class V cavities using composite and adhesive materials as follows: A)testing material -Venus-Diamond and GlumaComfortBond (Heraeus) B)competitor -CeramX-Duo and Prime&Bond-NT (Dentsply) A quadrant-based randomization was used to assign to every restoration its filling material and adhesive system: restorations have been performed according to the adhesive dentistry techniques by one expert clinician (>10 years of clinical experience). Each restoration was polished with the 2-step polishing system provided by Heraeus Kulzer (pre-polisher and high-gloss finisher...
Objectives: Throughout the Nov-07/Jan-08 time period, 60 class-V restorations have been performed... more Objectives: Throughout the Nov-07/Jan-08 time period, 60 class-V restorations have been performed. Methods: Patients were to satisfy strict inclusion/exclusion criteria in order to be part of the study. In particular, every patient was to need at least two restorations on vital-teeth, which had to be located on opposite quadrants of the oral cavity. In each patient all the restorations were made with microlayering technique using SwissMasterLight (EMS) curing light (800mW/cm2 for 20s). The test groups were randomly assigned to the class V cavites using composite and adhesive materials as follows: testing material - Venus-Diamond and GlumaComfortBond (Heraeus) competitor - CeramX-Duo and Prime&Bond-NT (Dentsply) A quadrant-based randomization was used to assign to every restoration its filling material and adhesive system: restorations have been performed according to the adhesive dentistry techniques by one expert clinician (>10 years of clinical experience). Each restoration was...
Objectives: Adhesive luting affects the long-term outcomes of composite inlays; dual-curing mater... more Objectives: Adhesive luting affects the long-term outcomes of composite inlays; dual-curing materials are broadly employed for this procedure. However light contribution still plays a key-role when luting thick inlays. Aim of this study was to evaluate the degree of conversion (DC) of two dual-curing luting materials cured below composite inlays by means of four LED lamps. The null hypothesis was to find no difference among the materials DC, independently from the inlay thickness and the LCU power/time combinations. Methods: 120 inlays (SignumHeraeusshade A2) of increasing thickness (2mm-3mm-4mm) were prepared in a custom template, then split into 24 groups (n=5) and luted on glass slides with two dual-cure luting composites (transparent): A) a self-curing luting composite with light-curing option (Multilink Automix, Ivoclar-Vivadent, Schaan, Liechtestein batchL42296) and B) a visible light-cured, dual-cured/self-cured material (Calibra-Dentsply-Konstanz, Germany batch5, 304,586; 4,...
In questo studio in vitrosi è valutata l’influenza di differenti pretrattamenti di superficie del... more In questo studio in vitrosi è valutata l’influenza di differenti pretrattamenti di superficie della zirconia (In-Ceram YZ, VITA Zahnfabrik) nella tecnica della cementazione adesiva con l’introduzione di una recente proposta merceologica (iCem®, Heraeus Kulzer). 20 blocchetti cubici di zirconia (lato mm 10) sono stati preparati in laboratorio odontotecnico secondo le procedure tipiche di un sistema zirconia-ceramica. Di ogni blocchetto sono state utilizzate più facce così da ottenere i seguenti 4 gruppi: (1) n. 10 campioni [No_T] (assenza di pretrattamenti, gruppo controllo), (2) n. 10 campioni [MDP] (applicazione di 10-MDP, Clearfil® Ceramic Primer, Kuraray Medical Inc.), (3) n. 20 campioni [Sand_110] (applicazione di sabbiatura 110µm, 2.8 bar, 20»), (4) n. 10 campioni [Sand_MDP] (sabbiatura + priming con 10-MDP). In seguito all’applicazione dei pretrattamenti, si è effettuata la cementazione adesiva di iCem® con dischetti in composito (Ø mm 4, spessore mm 2, Venus®, Heraeus Kulzer)...
Introduction:The aim of this study is to evaluate the influence of different mixing-procedures an... more Introduction:The aim of this study is to evaluate the influence of different mixing-procedures and application methods of a self-etching-auto-luting composite on fiber post adaptation and adhesive-cementetion quality. Methods: Forty freshly extracted mono-radicular teeth (n=40) were endodontically treated and randomly divided into four groups. In all groups the same self-etching luting composite RelyX Unicem (3M-ESPE) was used to adhesively lute the fiber posts (RelyX Fiber Post 3M-ESPE). In group A we used Relyx Unicem Aplicap (3M Espe, USA) mixed by an amalgam-vibrator then applied directly on the post , in Group B the cement was applied using the Elongation Tip into the root canal, in Group C Relyx Unicem Aplicap (3M Espe, USA) was mixed by Rotomix and then directly applied into the root canal. In group D Relyx Unicem-Clicker (3M Espe), following the manufacturer's instructions for mixing, was applied using the Centrix system (Needle Tube 20 Ga). Teeth were then thermocycled ...
Minerva stomatologica, 2012
Aim of this study was to evaluate two different luting cements and how their clinical procedures ... more Aim of this study was to evaluate two different luting cements and how their clinical procedures influence the postcementation quality. Thirty-six freshly extracted mono-radicular teeth (N.=18) were treated endodontically and randomly divided into two groups. Posts were cemented respectively with two different self adhesive luting cements: Group A - RelyX Unicem (3M Espe) and Group B - Multilink Sprint (Ivoclar-Vivadent) following the manufacturers' instructions. Teeth were then thermocycled according to protocol ISO/TR 11405 and were immersed 24 hours in 2% methylene-blue solution. Each tooth was sectioned by a diamond-coated saw (Isomet-Buhler) from CEJ to apex. Each slice was examined for the presence or absence of gutta-percha remnants, voids, bubbles, dye infiltration degree and polymerization grade of the luting agent. Findings were evidenced by stereoscopic microscopy (30x) and Micro-Raman spectroscopy. Mann-Whitney and ANOVA statistical analyses were performed for all re...
Minerva stomatologica
The degree of conversion of a luting composite cement influences its clinical performance. Aim of... more The degree of conversion of a luting composite cement influences its clinical performance. Aim of the study was to evaluate the degree of conversion of 4 different composite cements by means of micro Raman spectrophotometry. Forty-four cylindrical onlays of different and defined thickness (1, 2, 3, 4 mm) were built using a custom made template. The onlays were made in composite material (Signum, Heraeus; shade A 3,5) and cemented onto a glass plate with different luting materials: dual curing (Variolink II, Calibra) and light curing (Venus flow, Tetric flow). The lamp tip was shielded in order to have the light reach the cement only through the onlay. Samples were divided into 12 groups (N.=3), differing in onlay thickness and luting material. Each sample was examined in three spots by a micro-Raman spectrophotometer (Dilor Hr-Labram). The conversion degree was evaluated by analyzing the variations in intensity of the 1638 cm(-1) aliphatic peak (C=C), characteristic of all Bis-GMA c...
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Papers by Nicola Barabanti