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Brazilian Dental Journal

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https://www.readbyqxmd.com/read/27982184/assessment-of-marginal-bone-loss-around-platform-matched-and-platform-switched-implants-a-prospective-study
#1
Newton Sesma, Carlos Garaicoa-Pazmino, Piero R Zanardi, Eliseo P Chun, Dalva Cruz Laganá
The aim of the present study was to perform a software-assisted radiographic assessment of the effect of platform-switching on marginal bone loss (MBL) around dental implants. Forty patients requiring a dental implant in non-grafted partially edentulous mandibles were enrolled and categorized into implants receiving a platform-matched abutment (control group) or implants with a platform-switched abutment (test group). Standardized digital periapical radiographs were taken at the time of implant placement (T0), at implant loading (T1) and 1-year after functional loading (T2)...
November 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982179/streptococcus-mutans-biofilm-influences-on-the-antimicrobial-properties-of-glass-ionomer-cements
#2
Suzana B P Fúcio, Andréia B de Paula, Janaina C O Sardi, Cristiane Duque, Lourenço Correr-Sobrinho, Regina M Puppin-Rontani
The aim of this study was to evaluate the in vitro antibacterial and biofilm inhibition properties of glass ionomer restorative cements. Ketac Nano, Vitremer, Ketac Molar Easymix and Fuji IX were analyzed using the following tests: a) agar plate diffusion test to evaluate the inhibitory activity of cements against S. mutans (n=8); b) S. mutans adherence test by counting colony-forming units after 2 h of material/bacteria exposure (n=10); c) biofilm wet weight after seven days of bacterial accumulation on material disks, with growth medium renewed every 48 h (n=10); d) pH and fluoride measurements from the medium aspired at 48 h intervals during the 7-day biofilm development (n=10)...
November 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982195/oral-adenosquamous-carcinoma-mimicking-a-pyogenic-granuloma-a-challenging-diagnosis
#3
Celina Faig Lima, Renata Acay, Ana Lia Anbinder, Janete Dias Almeida, Yasmin Rodarte Carvalho
Adenosquamous carcinoma is an aggressive variant of squamous cell carcinoma. This report describes a case of adenosquamous carcinoma with clinical features of a benign lesion and discusses the differential diagnoses, especially regarding histopathological and immunohistochemical analyses. A 45-year-old male was referred to our outpatient clinic complaining about a rapid-growing enlargement in hard palate. Clinical examination revealed an erythematous and pedunculated nodule with lobulated non-ulcerated surface...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982194/histologic-and-tomographic-findings-of-bone-block-allografts-in-a-4-years-follow-up-a-case-series
#4
Daniel Deluiz, Luciano Santos Oliveira, Paul Fletcher, Fábio Ramôa Pires, Justine Monnerat Tinoco, Eduardo Muniz Barretto Tinoco
The aim of this paper is to report histologic and tomographic findings of fresh frozen bone block allografts bearing dental implants in functional occlusion in a long-term follow-up. Four patients with implants functionally loaded for 4 years on augmented ridges requiring additional mucogingival surgery or implant placement were included in this case series. Cone-beam tomography scans were compared volumetrically between the baseline (first implant placement) and current images. Biopsies of the grafts were retrieved and sent to histological analysis...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982193/use-of-feldspathic-porcelain-veneers-to-improve-smile-harmony-a-3-year-follow-up-report
#5
Leonardo Federizzi, Érica Alves Gomes, Samantha Schaffer Pugilato Báratro, Flares Baratto-Filho, Ataís Bacchi, Aloísio Oro Spazzin
This case report describes an esthetic treatment to improve the shape and alignment of the anterior teeth, reestablishing smile harmony, using feldspathic porcelain veneers. Results of clinical follow up after 36 months are also presented. The advantages, disadvantages and limitations of the technique are detailed with reference to the relevant literature. This suggests that the success of treatment depends on adequate conditions of bonding between the veneers and the tooth complex, which involves parameters such as the strength and durability of the bond interface...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982192/differential-impacts-of-caries-classification-in-children-and-adults-a-comparison-of-icdas-and-dmf-t
#6
Rosa Ana Melgar, Joanna Tatith Pereira, Patrícia Blaya Luz, Fernando Neves Hugo, Fernando Borba de Araujo
The aim of this study was to describe and compare findings regarding the prevalence and severity of dental caries when using ICDAS and DMFT/dmft in an epidemiological study with children and their mothers. This cross-sectional study evaluated 150 preschoolers and their mothers. Data were collected with ICDAS and then transformed into DMFT/dmft. ICDAS scores related to caries were analyzed according to three different cut-off-points: CP1 (0-healthy/1-6-caries), CP2 (0-1-healthy/2-6-caries) and CP3 (0-2-healthy/3-6-caries), representing the D/d of DMFT/dmft...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982191/effects-of-image-compression-on-linear-measurements-of-digital-panoramic-radiographs
#7
Leonardo Francisco Provedel, Bruna Natália Alves da Silva Pimentel, Tarcísio Martins de Jesus, Ana Paula Souza Lacerda, Izabel Regina Fischer Rubira-Bullen, Viviane Almeida Sarmento
This study aimed to evaluate the accuracy of panoramic radiographs obtained by digital system based on charge coupled device (CCD) and a phosphor storage plate (PSP) system with two different file formats, JPEG irreversible type and BMP. Linear measurements of artificial bony defects were made in dry mandibles with a digital caliper. Measures of digital panoramic radiographs were taken in ImageJ(r) software. Each measurement was performed twice by an experienced examiner. The intra-rater agreement was considered very strong (Pearson's correlation coefficient of 0...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982190/dragon-s-blood-sap-croton-lechleri-as-storage-medium-for-avulsed-teeth-in-vitro-study-of-cell-viability
#8
Christine Men Martins, Elizane Ferreira Hamanaka, Thayse Yumi Hoshida, Ana Maria Sell, Mirian Marubayashi Hidalgo, Catarina Soares Silveira, Wilson Roberto Poi
Tooth replantation success depends on the condition of cementum periodontal ligament after tooth avulsion; which is influenced by storage medium. The dragon's blood (Croton lechleri) sap has been suggested as a promising medium because it supports collagen formation and exhibits healing, anti-inflammatory and antimicrobial properties. Thus, the aim of this study was to evaluate the efficacy of dragon's blood sap as a storage medium for avulsed teeth through evaluation of functional and metabolic cell viability...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982189/gabapentin-differentially-modulate-c-fos-expression-in-hypothalamus-and-spinal-trigeminal-nucleus-in-surgical-molar-extraction
#9
Jamil Ahsan Kazi, Ban Kahtan Ibrahim
The study on the efficacy of oral analgesics reported that no single class of drug is effective in post-surgical dental pain. Pain following removal of third molar is most commonly used and widely accepted acute pain model for assessing the analgesic effect of drugs in humans. Reports demonstrated that analgesic efficacy in the human dental model is highly predictive. The high incidence of false-negative findings in analgesic investigations hinders the process of molecular discovery. Molecular mechanism of post-surgical pain is not known...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982188/tensile-strength-of-resin-cements-used-with-base-metals-in-a-simulating-passive-cementation-technique-for-implant-supported-prostheses
#10
Hilmo Barreto Leite Falcão, Ricardo Faria Ribeiro, Raphael Freitas de Souza, Ana Paula Macedo, Rossana Pereira de Almeida
The aim of this study was to analyze the tensile strength of two different resin cements used in passive cementation technique for implant-supported prosthesis. Ninety-six plastic cylinders were waxed in standardized forms, cast in commercially pure titanium, nickel-chromium and nickel-chromium-titanium alloys. Specimens were cemented on titanium cylinders using self-adhesive resin cement or conventional dual-cured resin cement. Specimens were divided in 12 groups (n=8) in accordance to metal, cement and ageing process...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982187/effect-of-acid-etching-silane-and-thermal-cycling-on-the-bond-strength-of-metallic-brackets-to-ceramic
#11
Natália Regina Santos de Matos, Ana Rosa Costa, Heloísa Cristina Valdrighi, Américo Bortolazzo Correr, Silvia Amélia Vedovello, Milton Santamaria, Lourenço Correr-Sobrinho
The aim of this study was to evaluate the effect of silanes, thermal cycling and acid etching on the shear bond strength (SBS) of metallic brackets to feldspathic ceramic. Feldspathic ceramic cylinders (Groups 1, 2, 5 and 6) were etched for 60 s with 10% hydrofluoric acid and Groups 3, 4, 7 and 8, without acid etching. Two layers of silane Clearfil Ceramic Primer (CCP, Groups 1 to 4) and two layers of RelyX Ceramic Primer (RCP, groups 5 to 8) were applied and dried for 60 s. Brackets were bonded to the cylinders with Transbond XT and light-activated for 40 s with Bluephase G2...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982186/the-effect-of-hydrofluoric-acid-concentration-and-heat-on-the-bonding-to-lithium-disilicate-glass-ceramic
#12
Daniel Sundfeld, Lourenço Correr-Sobrinho, Núbia Inocêncya Pavesi Pini, Ana Rosa Costa, Renato Herman Sundfeld, Carmem Silvia Pfeifer, Luis Roberto Marcondes Martins
The aim of this study was to evaluate the effects of hydrofluoric acid (HF) concentration and previous heat treatment (PHT) on the surface morphology and micro-shear bond strength (mSBS) of a lithium disilicate glass ceramic (EMX) to resin cement. One hundred four EMX specimens were randomly assigned to two groups (n=52) according to the HF concentration: 5% and 10%. A new random distribution was made according to the PHTs (n=13): control (no PHT); previously heated HF (70 °C); previously heated EMX surface (85 °C); the combination of heated HF + heated EMX surface...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982185/physico-chemical-and-histomorphometric-evaluation-of-zinc-containing-hydroxyapatite-in-rabbits-calvaria
#13
Alinne Azevedo Pereira da Silva Suruagy, Adriana Terezinha Neves Novellino Alves, Suelen Cristina Sartoretto, José de Albuquerque Calasans-Maia, José Mauro Granjeiro, Mônica Diuana Calasans-Maia
The aim of this study was to characterize the physico-chemical properties and bone repair after implantation of zinc-containing nanostructured porous hydroxyapatite scaffold (nZnHA) in rabbits' calvaria. nZnHA powder containing 2% wt/wt zinc and stoichiometric nanostructured porous hydroxyapatite (nHA - control group) were shaped into disc (8 mm) and calcined at 550 °C. Two surgical defects were created in the calvaria of six rabbits (nZnHA and nHA). After 12 weeks, the animals were euthanized and the grafted area was removed, fixed in 10% formalin with 0...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982183/adhesives-doped-with-bioactive-niobophosphate-micro-filler-degree-of-conversion-and-microtensile-bond-strength
#14
Karina Kato Carneiro, Marcia Margarete Meier, Clenilton Costa Dos Santos, Adeilton Pereira Maciel, Ceci Nunes Carvalho, José Bauer
To evaluate the effect of incorporating niobium phosphate bioactive glass (NbG) into commercial etch-and-rinse adhesive systems, with and without silane, on their degree of conversion (DC) (%) and microtensile bond strength (μTBS). The NbG micro-filler was added to two etch-and-rinse adhesive systems: One Step (OS) and Prime & Bond (PB) at 40% concentration. The following groups were formed: control without glass addition OS; addition of unsilanized NbG (OSNbG); addition of silanized NbG (OSNbGS); control without glass PB; addition of unsilanized NbG (PBNbG); addition of silanized NbG (PBNbGS)...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982182/alkaline-peroxides-versus-sodium-hypochlorite-for-removing-denture-biofilm-a-crossover-randomized-trial
#15
Amanda Peracini, Rômulo Rocha Regis, Raphael Freitas de Souza, Valéria Oliveira Pagnano, Cláudia Helena Lovato da Silva, Helena de Freitas Oliveira Paranhos
This study evaluated the efficacy of cleanser solutions on denture biofilm removal by a crossover randomized clinical trial. Thirty two edentulous patients were instructed to brush their dentures (specific brush and liquid soap) three times a day (after breakfast, lunch and dinner) and to soak them (≥ 8 h) in: (C) control -water; (AP): alkaline peroxide; or (SH) 0.5% sodium hypochlorite. Each solution was used for 21 days (three cycles of 7 days). At the end of each cycle, the inner surfaces of maxillary dentures were disclosed (1% neutral red) and photographed (HX1 - Sony)...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982181/bonding-of-the-polymer-polyetheretherketone-peek-to-human-dentin-effect-of-surface-treatments
#16
Regina Furbino Villefort Rocha, Lilian Costa Anami, Tiago Moreira Bastos Campos, Renata Marques de Melo, Rodrigo Othávio de Assunção E Souza, Marco Antonio Bottino
Polyetheretherketone (PEEK) is a material suitable for frameworks of fixed dental prostheses. The effect of different surface treatments on the bond strength of PEEK bonded to human dentin was evaluated. One hundred PEEK cylinders (3 mm×3 mm) were divided into five groups according to surface treatment: silica coating, sandblasting with 45 μm Al2O3 particles, etching with 98% sulfuric acid for 5, 30 and for 60 s. These cylinders were luted with resin cement onto 50 human molars. First, each tooth was embedded in epoxy resin and the buccal dentin surface was exposed...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982180/effects-of-contamination-by-hemostatic-agents-and-use-of-cleaning-agent-on-etch-and-rinse-dentin-bond-strength
#17
César Rogério Pucci, Rodrigo Maximo de Araújo, Ana Julia Farias de Lacerda, Mirella Anjos de Souza, Maria Filomena Rocha Lima Huhtala, Fernanda Alves Feitosa
The aim of this study was to evaluate the influence of contamination by hemostatic agents and rinsing with chlorhexidine on bond strength between dentin and resin composite. Ninety-six bovine teeth were sectioned to expose a flat dentin surface area. A standardized cavity with 2.0 mm in thickness, superficial diameter of 4.0 mm and bottom diameter of 3.0 mm was prepared with a diamond bur in each dentin specimen. The teeth were divided into four groups according to the hemostatic employed: G1: control; G2: use of ViscoStat, Ultradent; G3: Hemosthasegel, FGM; and G4: Hemostop, Dentsply...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982178/pulp-chamber-heating-an-in-vitro-study-evaluating-different-light-sources-and-resin-composite-layers
#18
Lígia Maria Lima Andreatta, Adilson Yoshio Furuse, Anuradha Prakki, Juliana Fraga Soares Bombonatti, Rafael Francisco Lia Mondelli
The aim of the present in vitro study was to evaluate the temperature variation inside the pulp chamber during light-activation of the adhesive and resin composite layers with different light sources. Cavities measuring 8x10 mm were prepared on the buccal surface of bovine incisors, leaving a remaining dentin thickness of 1 mm. Specimens were placed in a 37±1 °C water bath to standardize the temperature. The temperature in the pulp chamber was measured every 10 s during 40 s of light activation of the adhesive system (SBMP-3M/ESPE) and in the three consecutive 1-mm-thick layers of resin composite (Z250-3M/ESPE)...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982177/effect-of-gamma-radiation-and-endodontic-treatment-on-mechanical-properties-of-human-and-bovine-root-dentin
#19
Veridiana Resende Novais, Priscilla Barbosa Ferreira Soares, Carlla Martins Guimarães, Laís Rani Sales Oliveira Schliebe, Stella Sueli Lourenço Braga, Carlos José Soares
This study evaluated the effect of gamma radiation and endodontic treatment on the microhardness and flexural strength of human and bovine root dentin. Forty single-rooted human teeth and forty bovine incisor teeth were collected, cleaned and stored in distilled water at 4 °C. The human and bovine teeth were divided into 4 groups (n=10) resulting from the combination of two study factors: first, regarding the endodontic treatment in 2 levels: with or without endodontic treatment; and second, radiotherapy in two levels: with or without radiotherapy by 60 Gy of Co-60 gamma radiation fractioned into 2 Gy daily doses five days per week...
October 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27982176/on-the-causality-between-dentinal-defects-and-root-canal-preparation-a-micro-ct-assessment
#20
Gustavo De-Deus, Felipe Gonçalves Belladonna, Juliana Roter Marins, Emmanuel João Nogueira Leal Silva, Aline de Almeida Neves, Erick Miranda Souza, Alessandra de Castro Machado, Ricardo Tadeu Lopes, Marco Aurélio Versiani
This study aimed to evaluate the cause-effect relationship between canal preparation with ProTaper Universal (PTU) system and dentinal defects formation using micro-computed tomography (micro-CT) analysis. Forty mesial canals of mandibular molars with a type II Vertucci's canal configuration were scanned at an isotropic resolution of 14.16 µm. The sample was assigned to an experimental (n = 30) and a control (n = 10) groups, and the mesial canals were prepared with PTU system up to F2 instrument. The specimens from the experimental group were scanned and the cross-section images of the mesial roots, before and after preparation, were screened to identify the presence of dentinal defects...
October 2016: Brazilian Dental Journal
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