Erika Visintini
University of Trieste
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Featured researches published by Erika Visintini.
Dental Materials | 2010
Lorenzo Breschi; Annalisa Mazzoni; Fernando Nato; Marcela Carrilho; Erika Visintini; Leo Tjäderhane; Alessandra Ruggeri; Franklin R. Tay; Elettra De Stefano Dorigo; David H. Pashley
OBJECTIVES This study evaluated the role of endogenous dentin MMPs in auto-degradation of collagen fibrils within adhesive-bonded interfaces. The null hypotheses tested were that adhesive blends or chlorhexidine digluconate (CHX) application does not modify dentin MMPs activity and that CHX used as therapeutic primer does not improve the stability of adhesive interfaces over time. METHODS Zymograms of protein extracts from human dentin powder incubated with Adper Scotchbond 1XT (SB1XT) on untreated or 0.2-2% CHX-treated dentin were obtained to assay dentin MMPs activity. Microtensile bond strength and interfacial nanoleakage expression of SB1XT bonded interfaces (with or without CHX pre-treatment for 30s on the etched surface) were analyzed immediately and after 2 years of storage in artificial saliva at 37 degrees C. RESULTS Zymograms showed that application of SB1XT to human dentin powder increases MMP-2 activity, while CHX pre-treatment inhibited all dentin gelatinolytic activity, irrespective from the tested concentration. CHX significantly lowered the loss of bond strength and nanoleakage seen in acid-etched resin-bonded dentin artificially aged for 2 years. SIGNIFICANCE The study demonstrates the active role of SB1XT in dentin MMP-2 activation and the efficacy of CHX inhibition of MMPs even if used at low concentration (0.2%).
Dental Materials | 2010
Lorenzo Breschi; Patrizia Martin; Annalisa Mazzoni; Fernando Nato; Marcela Carrilho; Leo Tjäderhane; Erika Visintini; Milena Cadenaro; Franklin R. Tay; Elettra De Stefano Dorigo; David H. Pashley
OBJECTIVE Dentinal MMPs have been claimed to contribute to the auto-degradation of collagen fibrils within incompletely resin-infiltrated hybrid layers and their inhibition may, therefore, slow the degradation of hybrid layer. This study aimed to determine the contribution of a synthetic MMPs inhibitor (galardin) to the proteolytic activity of dentinal MMPs and to the morphological and mechanical features of hybrid layers after aging. METHODS Dentin powder obtained from human molars was treated with galardin or chlorhexidine digluconate and zymographically analyzed. Microtensile bond strength was also evaluated in extracted human teeth. Exposed dentin was etched with 35% phosphoric acid and specimens were assigned to (1) pre-treatment with galardin as additional primer for 30s and (2) no pre-treatment. A two-step etch-and-rinse adhesive (Adper Scotchbond 1XT, 3M ESPE) was then applied in accordance with manufacturers instructions and resin composite build-ups were created. Specimens were immediately tested for their microtensile bond strength or stored in artificial saliva for 12 months prior to being tested. Data were evaluated by two-way ANOVA and Tukeys tests (alpha=0.05). Additional specimens were prepared for interfacial nanoleakage analysis under light microscopy and TEM, quantified by two independent observers and statistically analyzed (chi(2) test, alpha=0.05). RESULTS The inhibitory effect of galardin on dentinal MMPs was confirmed by zymographic analysis, as complete inhibition of both MMP-2 and -9 was observed. The use of galardin had no effect on immediate bond strength, while it significantly decreased bond degradation after 1 year (p<0.05). Interfacial nanoleakage expression after aging revealed reduced silver deposits in galardin-treated specimens compared to controls (p<0.05). CONCLUSIONS This study confirmed that the proteolytic activity of dentinal MMPs was inhibited by the use of galardin in a therapeutic primer. Galardin also partially preserved the mechanical integrity of the hybrid layer created by a two-step etch-and-rinse adhesive after artificial aging.
Operative Dentistry | 2008
Milena Cadenaro; Lorenzo Breschi; Cesare Nucci; Francesca Antoniolli; Erika Visintini; Carlo Prati; Bruce A. Matis; R. Di Lenarda
This study evaluated the morphological effects produced in vivo by two in-office bleaching agents on enamel surface roughness using a noncontact profilometric analysis of epoxy replicas. The null hypothesis tested was that there would be no difference in the micromorphology of the enamel surface during or after bleaching with two different bleaching agents. Eighteen subjects were selected and randomly assigned to two treatment groups (n=9). The tooth whitening materials tested were 38% hydrogen peroxide (HP) (Opalescence Xtra Boost) and 35% carbamide peroxide (CP) (Rembrandt Quik Start). The bleaching agents were applied in accordance with manufacturer protocols. The treatments were repeated four times at one-week intervals. High precision impressions of the upper right incisor were taken at baseline as the control (CTRL) and after each bleaching treatment (T0: first application, T1: second application at one week, T2: third application at two weeks and T3: fourth application at three weeks). Epoxy resin replicas were poured from impressions, and the surface roughness was analyzed by means of a non-contact profilometer (Talysurf CLI 1000). Epoxy replicas were then observed using SEM. All data were statistically analyzed using ANOVA and differences were determined with a t-test. No significant differences in surface roughness were found on enamel replicas using either 38% hydrogen peroxide or 35% carbamide peroxide in vivo. This in vivo study supports the null hypothesis that two in-office bleaching agents, with either a high concentration of hydrogen or carbamide peroxide, do not alter enamel surface roughness, even after multiple applications.
Journal of Adhesive Dentistry | 2009
Annalisa Mazzoni; Erika Visintini; Vita F; Pasquantonio G; Vpa Saboia; Alessandra Ruggeri; Di Lenarda R; Elettra De Stefano Dorigo; Lorenzo Breschi
PURPOSE The aim of this study was to investigate whether an electrical device for dental adhesive application (ElectroBond) influences bonding of two-step etch-and-rinse adhesives. MATERIALS AND METHODS Human teeth were selected and cut perpendicularly to their long axis to expose middle/ deep dentin. Specimens were then longitudinally sectioned into halves (experimental and control halves) to create two similar bonding substrates. Experimental halves were bonded using an ElectroBond-assisted application, while control halves were bonded with disposable sponges. The adhesives tested were Adper Scotchbond 1XT and XP-BOND. Bonded specimens were submitted to the microtensile bond strength test. Additional adhesive interfaces were prepared and processed for nanoleakage investigation involving TEM examination. RESULTS The microtensile bond test revealed higher values (p < 0.05) for both adhesives if ElectroBond was used during layering (55.5 +/- 7.9 MPa for Adper Scotchbond 1XT and 54.7 +/- 7.1 MPa for XP-BOND) compared to the conventional mechanical adhesive application technique (41.1 +/- 6.1 MPa for Adper Scotchbond 1XT and 38.0 +/- 7.8 MPa for XP-BOND). No difference between the two adhesives was found under the same application conditions. With electricity-assisted application, TEM micrographs revealed a significant decrease in nanoleakage expression compared to the controls. CONCLUSION The use of an electric current produced by ElectroBond during the application of two-step etch-and-rinse adhesives may enhance resin impregnation, thus improving dentin hybridization. Further studies should be done to confirm that this device can similarly improve adhesive application in vivo.
Avances en Odontoestomatología | 2006
Erika Visintini; Luca Contardo; Matteo Biasotto; F Vignoletti
Objetivo del trabajo. En pacientes en terapia con anticoagulantes orales, una simple extraccion puede provocar hemorragias importantes. En la literatura se describen dos enfoques terapeuticos en casos de intervenciones quirurgicas en esta categoria de pacientes. Uno propone la reduccion de la dosis terapeutica del farmaco, mientras que el segundo sugiere la sustitucion con heparina. El objetivo de este trabajo es revisar la literatura que trata este tema con el fin de obtener un protocolo ideal. Conclusiones. En caso de extracciones simples es suficiente usar anestesia con vasoconstrictor (en el caso de que no haya otras contraindicaciones), realizar suturas bien tensadas, aplicar coadyuvantes hemostaticos locales y acido tranexamico topico. Solo en casos de intervenciones mas complejas, o con valores de INR mayores a 3,5, sera necesario reducir la dosis del farmaco y consecuente sustitucion con heparina de acuerdo a las instrucciones del hematologo y del cardiologo.
Journal of Adhesive Dentistry | 2009
Lorenzo Breschi; Federica Cammelli; Erika Visintini; A. Mazzoni; Francesca Vita; Marcela Rocha de Oliveira Carrilho; Milena Cadenaro; Stephen H. Foulger; Giovanni Mazzoti; Franklin R. Tay; Roberto Di Lenarda; David H. Pashley
European Journal of Oral Sciences | 2013
Giulio Marchesi; Andrea Frassetto; Erika Visintini; Marina Diolosà; Gianluca Turco; Stefano Salgarello; Roberto Di Lenarda; Milena Cadenaro; Lorenzo Breschi
Minerva stomatologica | 2007
Erika Visintini; Daniele Angerame; Fulvia Costantinides; Michele Maglione
American Journal of Dentistry | 2007
Lorenzo Breschi; Milena Cadenaro; Francesca Antoniolli; Erika Visintini; Manuel Toledano; Di Lenarda R
International Journal of Periodontics & Restorative Dentistry | 2011
Giovanna Orsini; Claudio Stacchi; Erika Visintini; D Di Iorio; Angelo Putignano; Lorenzo Breschi; R. Di Lenarda