Ana K. Bedran‐Russo

University of Illinois Chicago

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Guido F. Pauli

University of Illinois Chicago

James B. McAlpine

University of Illinois Chicago

Shao‐Nong Chen

University of Illinois Chicago

Cristina de Mattos Pimenta Vidal

University of Iowa

Ariene A. Leme‐Kraus

University of Iowa

Yvette Alania

University of Illinois Chicago

Rasika Phansalkar

University of Illinois Chicago

Joo‐Won Nam

Yeungnam University

Mariana Reis

University of Illinois Chicago

Thaiane Rodrigues Aguiar

University of Illinois Chicago

Cooperative Institutions

University of Illinois Chicago

107

Universidade Estadual de Campinas (UNICAMP)

Universidade de São Paulo

Universidade Estadual Paulista (Unesp)

Methodist University of Piracicaba

University of Illinois Urbana-Champaign

The Ohio State University

Universidade do Porto

Fundação Faculdade de Odontologia

American Association of Endodontists

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Evaluation of antimicrobial effectiveness and dentine mechanical properties after use of chemical and natural auxiliary irrigants

Journal of Dentistry (2015)

Doglas Cecchin Ana Paula Farina Matheus Albino Souza Lourenço Luís Albarello Alicia Pamela Schneider

Enterococcus faecalis

Distilled water

Grape seed extract

Sodium hypochlorite

10.1016/j.jdent.2015.03.013

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Citations (47)

Efeito da ciclagem térmica na microinfiltração e microtração de restaurações de resina composta

Revista da Faculdade de Odontologia - UPF (2010)

Larissa Maria Assad Cavalcante Luís Felipe Jochims Schneider Luciana de Souza Silva Ana K. Bedran‐Russo Luiz André Freire Pimenta

O objetivo deste estudo foi avaliar a microinfiltracao e a resistencia de uniao a dentina por meio do teste de microtracao em restauracoes classe III, usando dois sistemas adesivos – o autocondicionante Clearfil SE Bond®/Kuraray (SE) e o sistema de condicionamento acido total Single Bond®/3MEspe (SB) –, submetidas (C) ou nao a ciclagem termica (NC). Foram preparadas duzentas cavidades classe III em incisivos bovinos, divididas em quatro grupos: G1:SB/NC; G2:SB/C; G3:SE/NC; G4:SE/C. Apos restaurados, os G1 e G3 foram imersos em solucao corante e os dentes, levados a cortadora metalografica, sendo as restauracoes seccionadas no sentido V-L em fatias de 0,7 a 0,8 mm. Essas seccoes foram, primeiramente, avaliadas quanto a penetracao de corante e, em seguida, submetidas ao teste de microtracao (area adesiva: 1 mm2), confeccionando-se especimes em forma de “hourglass”. Para os G2 e G4 as amostras foram submetidas a 2000 ciclos termicos (5-55 oC) e, apos, sofreram os mesmos procedimentos descritos para os G1 e G3. Quanto a microinfilitracao, os resultados foram analisados pelo teste de Kruskal-Wallis (p ≤ 0,05), nao demonstrando diferenca estatisticamente significativa entre os grupos. Os dados de microtracao (MPa) foram submetidos ao teste Anova dois fatores e Tukey (p

10.5335/rfo.v14i2.713

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Direct and transdentinal biostimulatory effects of grape seed extract rich in proanthocyanidin on pulp cells

International Endodontic Journal (2018)

Andressa Flores Santos Johann M. Pacheco P. A. O. Silva Ana K. Bedran‐Russo Taia Maria Berto Rezende

To evaluate the potential biostimulatory effects of grape seed extract (GSE) on a primary culture of human pulp cells.Human molars were used to obtain the primary pulp cell culture and 0.5-mm dentine discs. For GSE direct exposure, dose-response (0.0065-6.5%) and time response (1-60 min of contact) were examined. For transdentinal exposure, 0.65% of GSE was tested for 24 h. Cellular metabolism, nitric oxide and collagen production, and cell morphology alterations were assessed at periods of 24 and 72 h. After cell differentiation and direct exposure to GSE, the total protein production (TP), alkaline phosphatase activity (ALP) and formation of mineralization nodules (MN) were assessed. The results were analysed by parametric tests or non-parametric tests (α = 0.05).The lower concentration of GSE tested (0.0065%) was associated with an increase in cellular metabolism, a reduction in the production of nitric oxide and an increase in extracellular matrix synthesis (collagen). Distinct behaviours were observed for the different concentrations, without a reduction of cellular metabolism >10% compared with the control, either when applied directly or transdentinally. SEM revealed no significant change in cell morphology, except for the positive control (H2 O2 ). There was no difference in TP, ALP or MN between the control group and the group exposed to GSE.Treatment with grape seed extract, even at the highest concentration and longest period, caused neither direct nor transdentinal cytotoxic effects on human pulp cells. Grape seed extract components may play a biostimulatory role and protect dental pulp cells when in direct contact.

Grape seed extract

10.1111/iej.13019

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Citations (14)

A dynamic mechanical method to assess bulk viscoelastic behavior of the dentin extracellular matrix

Dental Materials (2020)

Yvette Alania Mariana Reis Joo‐Won Nam Rasika Phansalkar James B. McAlpine

Glutaraldehyde

10.1016/j.dental.2020.09.014

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An American Dental Association Clinical Evaluators Panel survey.

Lauren L. Patton Alessandro Villa Ana K. Bedran‐Russo Kevin Frazier Sharukh S. Khajotia

Scope of Practice

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The adverse effects of radiotherapy on the structure of dental hard tissues and longevity of dental restoration

International Journal of Radiation Biology (2020)

Miguel Angel Muñoz Carolina Garín Wilfredo Alejandro González‐Arriagada Ximena Quintela Davila Patricio Häberle

Purpose: The main goal of this study was to evaluate the impact of different ionizing radiation doses on the mineral (carbonate/phosphate ratio, crystallinity index [CI]) and organic (amide III/phosphate, amide I sub-band ratios) structures, as well as the microhardness, of enamel and dentin, along with their influence on the bonding strength stability of the etch-and-rinse (ER) and self-etch (SE) dental adhesive strategies.Materials and methods: Enamel and dentin human tissue specimens were irradiated (with 0, 20, 40, and 70 Gy radiation doses, respectively) and sectioned to perform an attenuated total reflection-Fourier transform IR spectroscopy assay (ATR-FTIR) and the Vickers microhardness (VHN) test to conduct a biochemical and biomechanical evaluation of the tissues. Regarding the adhesive properties, restored enamel and dentin specimens exposed to the same radiation doses were submitted to microshear bond strength (μSBS) tests for enamel in immediate time (IM) and to microtensile bond strength (μTBS) tests after for IM and 12-month (12 M) period of time, Mann-Whitney U tests were implemented, using the ATR-FTIR data for significant differences (α < 0.05), and three- and two-way analyses of variance, along with post-testing, were performed on the μTBS and μSBS data (MPa), respectively (Tukey post hoc test at α = 0.05).Results: The ATR-FTIR results showed a significant decrease (p < .05) in the amide III/phosphate ratio after 20 Gy for the enamel and after 40 Gy for the dentin. The CI was significantly reduced for both tissues after a dose of 70 Gy (p < .05). All radiation doses significantly decreased microhardness values, relative to the respective enamel and dentin controls (p < .05). In both tissues and adhesive strategies, the decrease in bond strength was influenced by ionizing radiation starting from 40 Gy. The ER strategy showed high percentages of enamel cohesive failure. In general, ER in both tissues showed greater and more stable bond strength than SE against increased radiation doses and long term.Conclusions: It is possible to conclude that structural alterations of enamel and dentin are generated by all radiation doses, decreasing the microhardness of dental hard tissues and influencing bond strength over time, starting at 40 Gy radiation dose. The etch-and-rinse strategy demonstrates better adhesive performance but generates cohesive fractures in the enamel.

Attenuated total reflection

10.1080/09553002.2020.1741718

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Citations (33)

Site specific properties of carious dentin matrices biomodified with collagen cross-linkers.

PubMed (2013)

Ana K. Bedran‐Russo Sachin Karol David H. Pashley Grace Viana

To assess in non-cavitated carious teeth the mechanical properties of dentin matrix by measuring its reduced modulus of elasticity and the effect of dentin biomodification strategies on three dentin matrix zones: caries-affected, apparently normal dentin below caries-affected zone and sound dentin far from carious site.Nano-indentations were performed on dentin matrices of carious molars before and after surface modification using known cross-linking agents (glutaraldehyde, proanthocyanidins from grape seed extract and carbodiimide).Statistically significant differences were observed between dentin zones of demineralized dentin prior to surface biomodification (P < 0.05). Following surface modification, there were no statistically significant differences between dentin zones (P < 0.05). An average increase of 30-fold, 2-fold and 2.2-fold of the reduced modulus of elasticity was observed following treatments of the three dentin zones with proanthocyanidin, carbodiimide and glutaraldehyde, respectively.

Glutaraldehyde

Carbodiimide

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Citations (19)

Collagen-collagen interactions mediated by plant-derived proanthocyanidins: A spectroscopic and atomic force microscopy study

Acta Biomaterialia (2016)

Cristina de Mattos Pimenta Vidal Weiying Zhu Suresh Manohar Berdan Aydın Timothy A. Keiderling

Type I collagen

Glutaraldehyde

10.1016/j.actbio.2016.05.026

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Citations (69)

Comparison of different polishing methods on the surface roughness of microhybrid, microfill, and nanofill composite resins

Journal of Investigative and Clinical Dentistry (2017)

Mariana Dias Moda André Gustavo de Lima Godas Juliana C. Fernandes Thaís Yumi Umeda Suzuki Ana Paula Albuquerque Guedes

The aim of the present study was to evaluate the effect of different polishing methods on the surface roughness of resin-based composites subjected to a thermocycling procedure.A total of 192 specimens were divided into 24 groups, according to composite materials (Filtek Z250, Point 4, Renamel Nanofill, Filtek Supreme Plus, Renamel Microfill, and Premise) and finishing and polishing systems (Sof-Lex Pop On, Super Snap, Flexidisc, and Flexidisc+Enamelize). The specimens were subjected to thermocycling (5000 cycles).Filtek Supreme Plus showed the lowest surface roughness values before thermocycling. After thermocycling, Filtek Supreme Plus continued to have the lowest surface roughness, with a statistically-significant difference for the other materials. After thermocycling, there was no statistically-significant difference among all the polishing techniques studied.The thermocycling was concluded as being able to change composite resins' surface roughness, whereas different finishing and polishing methods did not result in surface roughness changes after thermocycling.

Resin composite

Colour difference

10.1111/jicd.12287

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Citations (38)

Importance of the hybrid layer on the bond strength of restorations subjected to cyclic loading

Journal of Biomedical Materials Research Part B Applied Biomaterials (2007)

Paula C. V. Yamazaki Ana K. Bedran‐Russo Patricia N R Pereira

The present study evaluated the long-term microtensile bond strength of collagen-depleted dentin followed by cyclic loading. Bovine flat, midcoronal dentin received one of the following surface treatments: acid-etch or acid-etched + 5% NaOCl for 2 min. The teeth were restored with Single Bond, Scotchbond Multi-purpose, One-Step Plus, or All-Bond 2 adhesive systems. Half of the specimens were randomly assigned to receive 200,000 cycles (50 N force). Teeth were sectioned into 1 x 1 mm thick slices and stored for 24 h, 1 month, 3 months, or 6 months. Specimens were subjected to tensile testing after elapsed storage time. Samples were analyzed by three-way ANOVA and Fisher's PLSD (p < 0.05). The results showed that the deproteinized groups without cyclic loading presented lower bond strength when compared with the control group, but the difference was only statistically significant for Single Bond and All-Bond 2 (p < 0.05). All adhesives presented a decrease in bond strength over time, regardless of the dentin treatment. When cyclic loaded, the decrease in bond strength for the deproteinized group was even greater when compared with the control group (p < 0.05). The results suggest that the hybrid layer is important as a stress-buffering layer when loading is applied, and thus the presence of collagen is essential.

Single bond

10.1002/jbm.b.30837

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Citations (16)