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Brazilian Dental Journal

Karla de Faria Vasconcelos, Sergio Lins de-Azevedo-Vaz, Deborah Queiroz Freitas, Francisco Haiter-Neto
This case report aimed to highlight the usefulness of cone beam computed tomography (CBCT) and its post-processing tools for the diagnosis, follow-up and treatment planning of invasive cervical resorption (ICR). A 16-year-old female patient was referred for periapical radiographic examination, which revealed an irregular but well demarcated radiolucency in the mandibular right central incisor. In addition, CBCT scanning was performed to distinguish between ICR and internal root resorption. After the diagnosis of ICR, the patient was advised to return shortly but did so only six years later...
July 2016: Brazilian Dental Journal
Gabriela Scatimburgo Polli, Gabriel Rodrigues Hatanaka, Filipe de Oliveira Abi-Rached, Lígia Antunes Pereira Pinelli, Márcio de Sousa Góes, Paulo Francisco Cesar, José Maurício Dos Santos Nunes Reis
This study evaluated the effect of grinding protocols and resintering on flexural fatigue limit and surface characterization of LavaTM Y-TZP. Bar-shaped specimens (20×4.0×1.2 mm, n=40; 20×4.0×1.5 mm, n=80) were obtained. Half of the thinner specimens (1.2 mm) constituted the as-sintered group (AS), while the thicker ones (1.5 mm) were ground with diamond burs under irrigation (WG) or not (G). The other half of thinner and half of ground specimens were resintered (1000 ºC, 30 min), forming the groups ASR, WGR and GR...
July 2016: Brazilian Dental Journal
Rafael Leonardo Xediek Consani, Tatiane Marinho, Atais Bacchi, Ricardo Armini Caldas, Victor Pinheiro Feitosa, Carmem Silvia Pfeifer
The study verified the bond strength in simulated dental restorations of silorane- or methacrylate-based composites repaired with methacrylate-based composite. Methacrylate- (P60) or silorane-based (P90) composites were used associated with adhesive (Adper Single Bond 2). Twenty-four hemi-hourglass-shaped samples were repaired with each composite (n=12). Samples were divided according to groups: G1= P60 + Adper Single Bond 2+ P60; G2= P60 + Adper Single Bond 2 + P60 + thermocycling; G3= P90 + Adper Single Bond 2 + P60; and G4= P90 + Adper Single Bond 2 + P60 + thermocycling...
July 2016: Brazilian Dental Journal
Celso Sebastião Garboza, Sandrine Bittencourt Berger, Ricardo Danil Guiraldo, Ana Paula Piovezan Fugolin, Alcides Gonini-Júnior, Sandra Kiss Moura, Murilo Baena Lopes
The purpose of this study was to evaluate the microshear bond strength of ceramic prosthetic structures reinforced by lithium disilicate cemented with resin cement under conditions of different surface treatments and adhesive systems. Seventy-two rectangular blocks of lithium disilicate (6.5 mm long × 5 mm wide × 1 mm thick) were fabricated, air abraded with 50-μm Al2O3 particles and divided into six groups (n=12) depending on the surface pretreatments. The groups were as follows: 10HF/S/SBM: 10% hydrofluoric acid etched for 20 s (10HF) + silane (S) + Adper Scotchbond Multi-Purpose (SBM); 10HF/S/SB: 10HF + S + Single Bond Universal (SB); 10HF/SBM; 10HF/SB; S/SBM and S/SB...
July 2016: Brazilian Dental Journal
Gabrielle Branco Rauber, Jussara Karina Bernardon, Luiz Clovis Cardoso Vieira, Hamilton Pires Maia, Françoá Horn, Carlos Rodrigo de Mello Roesler
The aim of this study was to compare the fatigue resistance of restored teeth with bulk fill composite resin, conventional composite resin with incremental insertion and unprepared sound teeth. Twenty-eight extracted maxillary premolars were selected and divided into 4 groups based on composite resin and insertion technique: control (C), conventional composite resin with incremental insertion (I) and bulk fill composite resin with three (BF3) or single increment (BF1). The restored specimens were submitted to fatigue resistance test with a 5 Hz frequency...
July 2016: Brazilian Dental Journal
João Luiz Bittencourt de Abreu, Maíra Prado, Renata Antoun Simão, Eduardo Moreira da Silva, Katia Regina Hostilio Cervantes Dias
Studies have been showing a decrease of bond strength in dentin treated with sodium hypochlorite (NaOCl). The aim of this study was to evaluate the effect of non-thermal argon plasma on the bond strength of a self-etch adhesive system to dentin exposed to NaOCl. Thirty-two flat dentin surfaces of bovine incisors were immersed in 2.5% NaOCl for 30 min to simulate the irrigation step during endodontic treatment. The specimens were divided into four groups (n=8), according to the surface treatment: Control (without plasma treatment), AR15 (argon plasma for 15 s), AR30 (argon plasma for 30 s) and AR45 (argon plasma for 45 s)...
July 2016: Brazilian Dental Journal
Beatriz Carlos Correa, Rodrigo Galo, Camila Scatena, Maria Cristina Borsatto, Aloísio Oro Spazzin, Silmara Aparecida Milori Corona, Daniel Galafassi
This study evaluated the effect of matrix metalloproteinase (MMP) inhibitors - 2% (CHX) and sodium fluoride (NaF) (5000 ppm) - on microtensile bond strength (μTBS) of composite resin to Er:YAG laser-irradiated dentin after chemical degradation of the bond interface. The occlusal surface of forty sound human molars was removed exposing the dentin surface (n=10), which was polished, irradiated with Er:YAG laser, acid etched and dried. Twenty specimens were rewetted with 2% CHX (control group) and 20 were rewetted with NaF (5000 ppm)...
July 2016: Brazilian Dental Journal
Mohamed I El-Anwar, Salah A Yousief, Engy M Kataia, Tarek M Abd El-Wahab
In the present study, GTX and ProTaper as continuous rotating endodontic files were numerically compared with WaveOne reciprocating file using finite element analysis, aiming at having a low cost, accurate/trustworthy comparison as well as finding out the effect of instrument design and manufacturing material on its lifespan. Two 3D finite element models were especially prepared for this comparison. Commercial engineering CAD/CAM package was used to model full detailed flute geometries of the instruments. Multi-linear materials were defined in analysis by using real strain-stress data of NiTi and M-Wire...
July 2016: Brazilian Dental Journal
Adriana Corrêa de Lima, Fuad Jacob Rached-Junior, Natália Spadini de Faria, Danielle Cristine Messias, Carolina de Andrade Lima Chaves, Jessica Vavassori de Freitas, Flares Baratto-Filho, Yara Teresinha Corrêa Silva-Sousa
The aim of this study was to assess the influence of sealer and light-curing unit on regional bond strength of resin composite to the weakened roots. Ninety roots of incisors were experimentally weakened, subjected to biomechanical preparation and filled with either Endofill, AH Plus or MTA Fillapex The roots were desobturated e reinforced with resin composite and fiber post light-activated with one of the light sources: halogen at 600 mW/ cm2 (QTH-600), LED at 800 mW/ cm2 (LED-800) and LED at 1500 mW/ cm2 (LED-1500)...
July 2016: Brazilian Dental Journal
Helena Suleiman de Macedo, Danielle Cristine Furtado Messias, Fuad Jacob Rached-Júnior, Ligia Teixeira de Oliveira, Yara Teresinha Correa Silva-Sousa, Walter Raucci-Neto
Root canal irrigants are used to minimize the negative effects of smear layer on endodontic sealer retention. The aim of this study was to evaluate the efficacy of agitation of 17% ethylenediaminetetraacetic acid (EDTA) with ultrasonic, 1064-nm Nd:YAG and 980-nm diode laser on the retention of an epoxy-based sealer to the root canal walls. Forty single-rooted bovine teeth were instrumented with ProTaper rotary system and divided into four groups according to the final irrigation protocol (n = 10): (1) 17% EDTA (control); (2) 17% EDTA with 50-s ultrasonic agitation; (3) 17% EDTA with 50-s diode laser (2-W) agitation; and (4) 17% EDTA with 50-s Nd:YAG (1...
July 2016: Brazilian Dental Journal
Emmanuel João Nogueira Leal da Silva, Thais Accorsi-Mendonça, Ana Carolina Pedrosa, José Mauro Granjeiro, Alexandre A Zaia
The aim of the present study was to verify the long-term cytotoxic effects of the MTA Fillapex and to compare them with AH Plus. Dissolution rate and pH were also evaluated. Human osteoblast cells were incubated with elutes of fresh specimens from AH Plus and MTA Fillapex, and with elutes of the same specimens for 4 successive weeks. Elute's pH was evaluated at each time point. A multiparametric cell viability assay was performed. For dissolution rate, ISO methodology was used. The results were analyzed by one-way analysis of variance, complemented with the Tukey post-test (p<0...
July 2016: Brazilian Dental Journal
Flávia Goulart da Rosa Cardoso, Adriana Chung, Frederico Canato Martinho, Carlos Henrique Ribeiro Camargo, Claudio Antônio Talge Carvalho, Brenda Paula Figueiredo de Almeida Gomes, Marcia Carneiro Valera
This clinical study investigated and quantified cultivable bacteria and their levels of endotoxins in persistent endodontic infection, determining their antigenicity against macrophages and fibroblast cells by IL-1β and TNF-α secretion and evaluating their relationship with clinical and radiographic features. Samples from the root canals were obtained after root filling removal. Culture techniques were used to determine the bacterial count and the endotoxins were determined by LAL-assay. PCR analysis (16S rDNA) was used for bacterial detection...
July 2016: Brazilian Dental Journal
Meenakshi Sharma
The aim of this study was to evaluate the viability of periodontal ligament cells of avulsed teeth in three different storage media. Forty-five mature premolars extracted for orthodontic therapeutic purposes were randomly and equally divided into three groups according to the storage medium: milk (control), rice water and egg white. After placing extracted teeth for 30 min in storage media, the scrapings of the periodontal ligament (PDL) were collected in Falcon tubes containing collagenase in 2.5 mL of phosphate buffer saline and were incubated for 30 min and centrifuged for 5 min at 800 rpm...
July 2016: Brazilian Dental Journal
Beatriz Dulcineia Mendes de Souza, Ana Maria Hecke Alves, Luciane Geanini Pena Dos Santos, Claudia Maria de Oliveira Simões, Wilson Tadeu Felippe, Mara Cristina Santos Felippe
The objective of this study was to evaluate the effectiveness of various storage media at 20 °C in maintaining the viability of human periodontal ligament fibroblasts (HPLF) over time. HPLF were maintained at 20 °C in skim milk (SM), whole milk (WM), freshly prepared Hank's balanced salt solution (HBSS), Save-A-Tooth(r), natural coconut water (NCW), coconut water industrialized (ICW) and tap water (negative control) for 3, 6, 24, 48, 72, 96 and 120 h. Cells maintained in Minimal Essential Medium (MEM-37) at 37 °C served as a positive control...
July 2016: Brazilian Dental Journal
Janaina Cardoso Moreira, Marjorie de Oliveira Gallinari, Vanessa Rahal, Ticiane Cestari Fagundes, Paulo Henrique Dos Santos, Marcia Regina de Moura, André Luiz Fraga Briso
Abastract This study aimed to evaluate the transenamel and transdentinal penetration of hydrogen peroxide (H202) applied to bovine teeth pigmented with black tea at different intensities. The following groups were formed DW: immersion in distilled water; BT100: immersion in an infusion of 1.6 g of black tea per 100 mL distilled water; BT10: immersion in an infusion of 1.6 g black tea per 10 mL distilled water. All groups were immersed for 6 days. To quantify the penetration of H202, the specimens were placed in artificial pulp chambers (APCs) and subjected to bleaching treatment with 38% H2O2 once per week for 3 weeks...
July 2016: Brazilian Dental Journal
Mayara Dos Santos Noronha, Dayse Andrade Romão, Jaime Aparecido Cury, Cínthia Pereira Machado Tabchoury
Fluoride present in toothpaste at 1,100 µg/g is considered effective on caries control. However, under high cariogenic challenge due to increasing sugar exposure, higher fluoride concentration (5,000 µg/g) could be necessary to compensate the unbalance on caries process. This was tested in a pH-cycling regimen, which evaluated the effect of fluoride concentration relative to toothpaste on reduction of enamel demineralization under conditions of two levels of cariogenic challenge. Enamel slabs (n=20) were subjected to two pH-cycling regimens, simulating 8x and 16x/day sugar exposure and were treated with solutions containing: 0 (no fluoride), 275 or 1,250 µg F/mL, resulting in 6 treatment groups: 4-h/0-F; 8-h/0-F; 4-h/275-F; 8-h/275-F; 4-h/1,250-F and 8-h/1,250-F...
July 2016: Brazilian Dental Journal
Vanessa de Carvalho Jovito, Irlan Almeida Freires, Danilo Augusto de Holanda Ferreira, Marçal de Queiroz Paulo, Ricardo Dias de Castro
School-age children are frequently at high risk for the onset of biofilm-dependent conditions, including dental caries and periodontal diseases. The objective of this study was to evaluate the clinical efficacy of a dentifrice containing Eugenia uniflora Linn. (Surinam cherry) extract versus a triclosan-based comparator in treating gingivitis in children aged 10-12 years. The in vitro antibacterial potential of the dentifrice was tested against oral pathogens (Streptococcus mutans, Streptococcus oralis and Lactobacillus casei)...
July 2016: Brazilian Dental Journal
Carlos E Allegretti, Roberta M Sampaio, Anna C R T Horliana, Paschoal L Armonia, Rodney G Rocha, Isabel Peixoto Tortamano
Inferior alveolar nerve block has a high failure rate in the treatment of mandibular posterior teeth with irreversible pulpitis. The aim of this study was to compare the anesthetic efficacy of 4% articaine, 2% lidocaine and 2% mepivacaine, all in combination with 1:100,000 epinephrine, in patients with irreversible pulpitis of permanent mandibular molars during a pulpectomy procedure. Sixty-six volunteers from the Emergency Center of the School of Dentistry, University of São Paulo, randomly received 3.6 mL of local anesthetic as a conventional inferior alveolar nerve block (IANB)...
July 2016: Brazilian Dental Journal
Leopoldina de Fátima Dantas de Almeida, Ana Paula Silveira Turrioni, Fernanda Gonçalves Basso, Liege Aldrovandi Montoro, Carlos Alberto de Souza-Costa, Josimeri Hebling
Phototherapy has been indicated as an adjunctive treatment for tissue repair, including the pulp tissue. However, there are no defined irradiation parameters, which is a great challenge to the clinical use of phototherapy. The aim of this study was to evaluate the effect of phototherapy with red LED on odontoblast-like MDPC-23 cells, using different parameter settings. Cells were seeded (104 cells/cm²), incubated for 12 h in complete DMEM and then the culture medium was replaced by DMEM supplemented with 0...
July 2016: Brazilian Dental Journal
Renata Barboza Coelho, Roberto Gonçalves, Ricardo de Mello Villas-Boas, Leticia Ladeira Bonato, Valquiria Quinelato, Aristides da Rosa Pinheiro, Aldir Machado, Carlos Henrique Ramirez Nunes, Rackel Gonçalves, Alexandre Resende Vieira, José Mauro Granjeiro, Priscila Ladeira Casado
Despite the success of osseointegrated implants, failures have increased significantly, associated with development of peri-implantitis. Multiple factors influence the peri-implant bone loss, including environmental and genetic causes. BMPs (Bone morphogenetic proteins) are growth factors that induce bone formation. FGF (fibroblast growth factors) and their receptors (FGFRs) play important roles by controlling the levels of cell proliferation, differentiation and migration. BMP/FGF relationship is responsible for promoting bone regeneration and bone loss...
July 2016: Brazilian Dental Journal
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