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Brazilian Dental Journal

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https://www.readbyqxmd.com/read/29267533/cemento-osseous-dysplasias-imaging-features-based-on-cone-beam-computed-tomography-scans
#1
Paulo Henrique Pereira Cavalcanti, Eduarda Helena Leandro Nascimento, Maria Luiza Dos Anjos Pontual, Andréa Dos Anjos Pontual, Priscylla Gonçalves Correia Leite de Marcelos, Danyel Elias da Cruz Perez, Flávia Maria de Moraes Ramos-Perez
Imaging exams have important role in diagnosis of cemento-osseous dysplasia (COD). Cone beam computed tomography (CBCT) stands out for allowing three-dimensional image evaluation. This study aimed to assess the prevalence of cases diagnosed as COD on CBCT scans, as well identify the main imaging features related to these lesions. An analysis was performed in a database containing 22,400 radiological reports, in which all cases showing some type of COD were initially selected. These CBCT exams were reevaluated to confirm the radiographic diagnosis and determine the prevalence and distribution of the types of COD with regard to gender, age and preferred location, while describing its most common imaging aspects...
January 2018: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29267532/influence-of-zingiber-officinale-extract-on-push-out-bond-strength-of-glass-fiber-post
#2
Tânia Mara da Silva, Virgílio Vilas Boas Fernandes, Rosemary Soares de Santana, Renata Marques de Melo Marinho, Márcia Carneiro Valera, Eduardo Bresciani
The aim of this study was to evaluate in vitro the influence of 20% glycolic ginger extract on the bond strength of glass-fiber post cemented with etch-and-rinse or self-etching resin cement. Forty-eight bovine roots were standardized (17±0.5 mm) and randomly divided into two groups, according to irrigant used during biomechanical preparation: NaOCl: 1% sodium hypochlorite and GEN: 20% glycolic ginger extract. Root canal was prepared and randomly assigned to one of two subgroups (n=12), according to luting protocol: self-etching (RelyX U200) and etch-and-rinse (RelyX ARC)...
January 2018: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29267531/impact-of-35-hydrogen-peroxide-on-color-and-translucency-changes-in-enamel-and-dentin
#3
Rebeca Pereira de Menezes, Paula Damasceno Silva, Pollyana Caldeira Leal, André Luis Faria-E-Silva
This study evaluated the effects of tooth bleaching with high-concentration of hydrogen peroxide on alterations of translucency parameter (TP) and color of dentin and enamel. The crown of five human molars was sectioned into four slices parallel to buccal surface. The dentin of external slices containing buccal/ lingual enamel was fully removed with diamond bur; while these slices were used to assess alterations on enamel. Alterations on dentin were assessed into the center of internal slices. The color of specimens was measured over white and black backgrounds using a spectrophotometer (CieL*a*b) at baseline, allowing to calculate the TP by difference between the color measured over each background...
January 2018: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29267530/influence-of-photoinitiator-on-accelerated-artificial-aging-and-bond-strength-of-experimental-resin-cements
#4
Helouise Righi, Ana Rosa Costa, Dayane Carvalho Ramos Salles de Oliveira, Gabriel Flores Abuna, Mario Alexandre Coelho Sinhoreti, Fabiana Scarparo Naufel
The goal of this study was to evaluate in vitro the effect of the photoinitiator phenylpropanedione (PPD), alone or combined with camphorquinone (CQ), on color stability of photoactivated resin cements and their bond strength to ceramics using a micro-shear test. Four resin cements were used: a commercial brand cement (RelyX Veneer®) and 3 experimental cements with different types and concentration of photoinitiators. For color analysis, ceramic discs were cemented on bovine dentin specimens to simulate indirect restorations (n=8) and were exposed to UV for 120 h and tested for color alteration using a reflectance spectrophotometer and the CIEL*a*b* system...
January 2018: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29267529/effect-of-ceramic-interposition-and-post-activation-times-on-knoop-hardness-of-different-shades-of-resin-cement
#5
Marina Barrêto Pereira Moreno, Ana Rosa Costa, Frederick Allen Rueggeberg, Américo Bortolazzo Correr, Mário Alexandre Coelho Sinhoreti, Gláucia Maria Bovi Ambrosano, Simonides Consani, Lourenço Correr
The aim of this study was to evaluate Knoop hardness of different shades of a resin cement light-cured directly or through ceramic discs, measured 15 min or 24 h after light exposure, and at different depths. Specimens of a commercial resin cement (Variolink Veneer) in seven shades, were fabricated in an elastomeric mold, covered with a mylar strip, a 0.7 mm thick ceramic disc (IPS e.max Press) was placed and the cement was light-activated for 20 s using a blue LED (Radii-Cal). The cured resin cement specimens were transversely wet-flattened to their middle portion and microhardness (Knoop) values were recorded at 15 min after light exposure and after deionized water storage at 37 ºC for 24 h...
January 2018: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29267528/one-abutment-at-one-time-concept-for-platform-switched-morse-implants-systematic-review-and-meta-analysis
#6
Joanes Silva Santos, Thiago de Santana Santos, Paulo Ricardo Saquete Martins, Nadine von Krockow, Paul Weigl, Hess Pablo
The aim of this systematic review and meta-analysis was to compare the peri-implant vertical bone loss of immediate loading of implant crowns using the one abutment at one time (AOT) protocol and implants with abutment removal (AR). This systematic review with meta-analysis was reported according to the PRISMA statement, with guidance from the Cochrane Collaboration Handbook. A total of 103 publications were identified in the PubMed database and reference lists of examined articles. After the screening of titles and abstracts, the eligibility of eight full-text articles was assessed...
January 2018: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29267527/bond-strength-and-cytotoxicity-of-a-universal-adhesive-according-to-the-hybridization-strategies-to-dentin
#7
Maria Luísa de Alencar E Silva Leite, Carlos Alberto de Souza Costa, Rosângela Marques Duarte, Ana Karina Maciel de Andrade, Diana Gabriela Soares
This study evaluated application protocol (etch-and-rinse/ER and self-etching/SE) and dentin wettability (wet and dry) on microtensile bond strength (μTBS) and transdentinal cytotoxicity of ScotchbondTM Universal (SU) adhesive system. The μTBS values and fracture mode were registered 24 h after adhesive system application and resin composite block build-up (n=5). For analysis of transdentinal cytotoxicity, odontoblast-like MDPC-23 cells were seeded on pulpal surface of dentin discs (0.4 mm thick) adapted to artificial pulp chambers (n=8)...
January 2018: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29267526/effect-of-grinding-and-multi-stimuli-aging-on-the-fatigue-strength-of-a-y-tzp-ceramic
#8
Tais Silvestri, Gabriel Kalil Rocha Pereira, Luis Felipe Guilardi, Marilia Pivetta Rippe, Luiz Felipe Valandro
This study aimed to investigate the effect of grinding and multi-stimuli aging on the fatigue strength, surface topography and the phase transformation of Y-TZP ceramic. Discs were manufactured according to ISO-6872:2008 for biaxial flexure testing (diameter: 15 mm; thickness: 1.2 mm) and randomly assigned considering two factors "grinding" and "aging": C- control (as-sintered); CA- control + aging; G- ground; GA- ground + aging. Grinding was carried out with coarse diamond burs under water-cooling. Aging protocols consisted of: autoclave (134°C, 2 bars pressure, 20 hours), followed by storage for 365 days (samples were kept untouched at room temperature), and by mechanical cycling (106 cycles by 20 Hz under a load of 50% from the biaxial flexure monotonic tests)...
January 2018: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29267525/apically-extruded-debris-in-filling-removal-of-curved-canals-using-3-niti-systems-and-hand-files
#9
Débora Delai, Daiana Boijink, Carolina Bender Hoppe, Abiana Soares Grecca, Patrícia Maria Poli Kopper
The aim of this study was to assess the amount of apically extruded debris during filling removal with WaveOne Gold (WOG), ProTaper Universal Retreatment (PTR), D-RaCe Retreatment (DRR) or hand files (HF), to compare the working time during filling removal, and to describe failures of NiTi instruments. Forty mesiobuccal roots of maxillary first molars were prepared with WOG Primary, obturated and divided into 4 groups (n=10), according to the instruments used: WOG, PTR, DRR or HF. Distilled water was used as irrigant and the extruded debris were collected in Eppendorf tubes and dried...
January 2018: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29267524/pentaerythritol-tetrasalicylate-in-the-chemical-composition-of-root-canal-sealers
#10
Manuela Gonçalves de Souza E Silva, Eliseu Aldrighi Münchow, Rafael Pino Vitti, Mário Alexandre Coelho Sinhoreti, Evandro Piva, Fabrício Aulo Ogliari, Cesar Henrique Zanchi
The aim of this study was to synthesize and evaluate physicochemical properties of a new salicylate derivative in experimental calcium-based root canal sealers. Two salicylate derivatives were synthesized for the transesterification reaction of methyl salicylate with two different alcohols (1,3-butylenoglicol disalicylate-BD and pentaerythritol tetrasalicylate -PT) in molar ratio 1:3 and 1:6, respectively. The products (BD and PT), were characterized by Fourier Transform Infrared Spectroscopy (FTIR) and Nuclear Magnetic Resonance spectroscopy (RMN)...
January 2018: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29267523/mmp2-and-mmp9-are-associated-with-apical-periodontitis-progression-and-might-be-modulated-by-tlr2-and-myd88
#11
Driely Barreiros, Paulo Nelson, Francisco Wanderley Garcia Paula-Silva, Katharina Morant Holanda de Oliveira, Marília Pacífico Lucisano, Andiara De Rossi, Lea Assed Bezerra Silva, Erika Calvano Küchler, Raquel Assed Bezerra Silva
The aim of this study was to evaluate the expression of MMP2 and MMP9 during apical periodontitis (AP) progression in TLR2 (TLR2 KO) and in MyD88 (MyD88 KO) knockout mice compared to wild type (WT) mice. AP was induced in mandibular first molars of TLR2 KO (n= 18), MyD88 KO (n= 18), and WT mice (n= 18). After 7, 21, and 42 days, the animals were euthanized and the jaws were dissected and subjected to histotechnical processing. Subsequent sections were stained by immunohistochemistry and evaluated for detection of MMP2 and MMP9...
January 2018: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29267522/three-dimensional-finite-element-analysis-of-varying-diameter-and-connection-type-in-implants-with-high-crown-implant-ratio
#12
Sandra Lúcia Dantas de Moraes, Fellippo Ramos Verri, Joel Ferreira Santiago, Daniel Augusto de Faria Almeida, Cleidiel Aparecido Araujo Lemos, Jéssica Marcela de Luna Gomes, Eduardo Piza Pellizzer
The aim of this study was to evaluate the effect of varying the diameter, connection type and loading on stress distribution in the cortical bone for implants with a high crown-implant ratio. Six 3D models were simulated with the InVesalius, Rhinoceros 3D 4.0 and SolidWorks 2011 software programs. Models were composed of bone from the posterior mandibular region; they included an implant of 8.5 mm length, diameter Ø 3.75 mm or Ø 5.00 mm and connection types such as external hexagon (EH), internal hexagon (IH) and Morse taper (MT)...
January 2018: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29267521/retention-system-and-splinting-on-morse-taper-implants-in-the-posterior-maxilla-by-3d-finite-element-analysis
#13
Cleidiel Aparecido Araujo Lemos, Fellippo Ramos Verri, Joel Ferreira Santiago, Daniel Augusto de Faria Almeida, Victor Eduardo de Souza Batista, Pedro Yoshito Noritomi, Duardo Piza Pellizzer
The purpose of this study was to evaluate different retention systems (cement- or screw-retained) and crown designs (non-splinted or splinted) of fixed implant-supported restorations, in terms of stress distributions in implants/components and bone tissue, by 3-dimensional (3D) finite element analysis. Four 3D models were simulated with the InVesalius, Rhinoceros 3D, and SolidWorks programs. Models were made of type III bone from the posterior maxillary area. Models included three 4.0-mm-diameter Morse taper (MT) implants with different lengths, which supported metal-ceramic crowns...
January 2018: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29267520/how-to-select-a-questionnaire-with-a-good-methodological-quality
#14
Saul Martins Paiva, Matheus de França Perazzo, Fernanda Ruffo Ortiz, Isabela Almeida Pordeus, Paulo Antônio Martins-Júnior
In the last decades, several instruments have been used to evaluate the impact of oral health problems on the oral health-related quality of life (OHRQoL) of individuals. However, some instruments lack thorough methodological validation or present conceptual differences that hinder comparisons with instruments. Thus, it can be difficult to clinicians and researchers to select a questionnaire that accurately reflect what are really meaningful to individuals. This short communication aimed to discuss the importance of use an appropriate checklist to select an instrument with a good methodological quality...
January 2018: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29267519/preemptive-and-postoperative-medication-protocols-for-root-coverage-combined-with-connective-tissue-graft
#15
Ana Paula Oliveira Giorgetti, Rafaela de Matos, Renato Corrêa Viana Casarin, Suzana Prese Pimentel, Fabiano Ribeiro Cirano, Fernanda Vieira Ribeiro
This trial evaluated the preemptive and postoperative effect of dexamethasone and ibuprofen on prevention of pain/discomfort, edema and interference in daily life in patients undergoing root coverage combined with subepithelial connective tissue graft (CAF + CTG). Twenty patients were randomly assigned as follows: NSAID Group: 400mg Ibuprofen 60 min preemptive + 400mg Ibuprofen postoperative; or SAID Group: 4mg Dexamethasone 60 min preemptive + 4mg Dexamethasone postoperative. The postoperative medication was administered 8 and 16 h post-surgery...
January 2018: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29267518/chronic-periodontitis-and-rankl-opg-ratio-in-peri-implant-mucosae-inflammation
#16
Lucas Carneiro Costa, Marcos Alexandre da Fonseca, Aristides da Rosa Pinheiro, Telma Regina da Silva Aguiar, Aldir Nascimento Machado, Valquiria Quinelato, Leticia Ladeira Bonato, Diego Pinheiro Aguiar, Thays Vieira, Fernando Luiz Duarte de Almeida, Julie Calixto Lobo, Miriam Jordão, Priscilla Gonçalves Lomardo, José Mauro Granjeiro, Priscila Ladeira Casado
tHistory of chronic periodontitis (CP) is a risk factor for oseointegration failure. The osteoclastogenesis system (RANK, RANKL and OPG) is critical for bone homeostatic control. We investigated the levels of OPG and RANKL in peri-implant tissues from volunteers with and without a history of CP and their association with mucosae inflammation. This is a single-blind case-contro study. Diagnosis of a history of CP and peri-implant examination was performed on 46 volunteers, divided into control (without history of CP, n=26) and CP group (with history of CP, n=20)...
January 2018: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29211133/a-12-year-retrospective-study-of-avulsion-cases-in-a-public-brazilian-dental-trauma-service
#17
Gabriela Campos Mesquita, Priscilla Barbosa Ferreira Soares, Camilla Christian Gomes Moura, Marina Guimarães Roscoe, Saul Martins Paiva, Carlos José Soares
This study assessed the epidemiological characteristics and management of the permanent teeth avulsion cases attended in a Brazilian dental trauma service from December 2005 to August 2016. A retrospective study was conducted of case records of 93 patients involving 139 avulsed teeth. Data included sex, age, trauma etiology, location of the accident, number and position of avulsed teeth, and presence and type of associated traumatic lesions. Management of the avulsed teeth was addressed as: time elapsed until teeth were retrieved from the accident's location; teeth's cleaning method and storage media; time elapsed until seeking treatment and replantation...
November 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29211132/effect-of-the-bis-dimethylamino-benzydrol-coinitiator-on-the-mechanical-and-biological-properties-of-a-composite
#18
Bruna Fortes Bittencourt, John Alexis Dominguez, Luís Antonio Pinheiro, Paulo Vitor Farago, Elizabete Brasil Dos Santos, Leticia Antonelo Campos, João Carlos Gomes, Osnara Maria Mongruel Gomes
To examine the effect of the alternative coinitiator 4,4'bis dimethylamino benzydrol (BZN) in degree of conversion (DC), mechanical and biological properties of experimental composites. The coinitiator BZN was used in three concentrations (0.2, 0.5 and 1.2%), and the coinitiator DMAEMA was used as control at the same concentrations as above. The molar concentration of camphorquinone (CQ) and coinitiators was kept constant (1:1). The composites were manipulated and submitted to microhardness test (VHN), flexural and compressive strength (in MPa), elastic modulus (GPa), DC (FT-IR) and in vitro cytotoxicity (against 3T3 fibroblastic cells) of the experimental resins...
November 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29211131/in-vitro-evaluation-of-the-remineralizing-potential-and-antimicrobial-activity-of-a-cariostatic-agent-with-silver-nanoparticles
#19
Beatriz Brandão Scarpelli, Marília Franco Punhagui, Márcio Grama Hoeppner, Ricardo Sergio Couto de Almeida, Felipe Augusto Juliani, Ricardo Danil Guiraldo, Sandrine Bittencourt Berger
Cariostatic treatment has been shown to successfully arrest caries. However, it blackens the carious tooth structure. This study evaluated the effects of an experimental cariostatic agent with silver nanoparticles (Ag-Nano) using microhardness (MH) and microbiological tests. The cariostatic agents tested were: Saforide®, Cariestop®, Ancarie® and Ag-Nano. Sixty-six samples from deciduous enamel were submitted to initial (after pH cycling to obtain initial caries-like lesion) and final (after cariostatic application) MH testing and %MH values were calculated...
November 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29211130/dentin-sealing-and-bond-strength-evaluation-of-hema-free-and-multi-mode-adhesives-to-biomodified-dentin
#20
Renata Bacelar-Sá, Marcelo Giannini, Glaucia Maria Bovi Ambrosano, Ana Karina Bedran-Russo
This study evaluated the effect of dentin biomodification on the bond strength (BS) and sealing ability (SA) of HEMA-free and multi-mode adhesives after 24 h and 6 months of water storage. Four adhesives were tested: two multi-mode (Scotchbond Universal - SU, and Prime & Bond Elect - PB) and two HEMA-free (All-Bond 3 - AB, and G-Aenial - GA). Human third molars were selected and dentin was treated with two cross-linking agents (5% glutaraldehyde and 6.5% proanthocyanidin-rich grape seed extract - PACs) for 10 min or kept untreated (control group) (n=6)...
November 2017: Brazilian Dental Journal
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