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    1380 results match your criteria Brazilian oral research[Journal]

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    Determinants of oral self-care in the Brazilian adult population: a national cross-sectional study.
    Braz Oral Res 2017 Dec 18;31:e115. Epub 2017 Dec 18.
    Universidade Estadual Paulista "Júlio de Mesquita Filho" - Unesp, Araçatuba School of Dentistry, Department of Pediatric and Social Dentistry, Araçatuba, SP, Brazil.
    This study aims to investigate variables related to adherence to oral self-care in the Brazilian adult population. It is an exploratory study, using secondary data from a population-based survey on a representative sample of the adult population of the entire Brazilian territory (n=60202). The sample was selected using a multiple stage approach. Read More

    Effectiveness of different final irrigation techniques and placement of endodontic sealer into dentinal tubules.
    Braz Oral Res 2017 Dec 18;31:e114. Epub 2017 Dec 18.
    Universidade Positivo, Department of Dentistry, Curitiba, PR, Brazil.
    The aim of this study was to compare two irrigation techniques and four devices for endodontic sealer placement into the dentinal tubules. Ninety-nine single-rooted human teeth were instrumented and allocated to either the control (CO) (n=11) or experimental groups according to the irrigation method: syringe and NaveTip needle (NT) (n=44), and EndoActivator (EA) (n=44). These groups were subdivided according to sealer placement into K-File (KF), lentulo spiral (LS), Easy Clean (EC), and EndoActivator (EA) subgroups. Read More

    Comparison of two methods of irrigant agitation in the removal of residual filling material in retreatment.
    Braz Oral Res 2017 Dec 18;31:e113. Epub 2017 Dec 18.
    Universidade de São Paulo - USP, Bauru School of Dentistry, Department of Dentistry, Endodontics and Dental Materials, Bauru, SP, Brazil.
    The aim of this study was to compare the efficacy of passive ultrasonic irrigation and EasyClean for removing residual filling material in retreatment. Twenty-two maxillary lateral incisors with apical curvature were instrumented with ProTaper files and filled with Endofill using the lateral compactation technique. Removal of filling material was performed with Reciproc, Mtwo and ProDesign Logic 50/. Read More

    Effect of CRABP2 on the proliferation and odontoblastic differentiation of hDPSCs.
    Braz Oral Res 2017 Dec 18;31:e112. Epub 2017 Dec 18.
    Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Department of Pediatric Dentistry, Shanghai, China.
    Cellular retinoic acid-binding protein 2 (CRABP2) has been detected in several organs during embryonic development. Recent studies have demonstrated that CRABP2 plays important roles in the retinoic acid, β-catenin and Notch signaling pathways, as well as in the interaction between epithelial and mesenchymal cells, which are important for human dental pulp stem cells (hDPSCs) and tooth development. In the present study, the expression of CRABP2 during mouse molar development and the role of CRABP2 in hDPSC odontoblastic differentiation were evaluated. Read More

    Correlation and comparative analysis of the CPQ8-10 and child-OIDP indexes for dental caries and malocclusion.
    Braz Oral Res 2017 Dec 18;31:e111. Epub 2017 Dec 18.
    Universidade Federal dos Vales do Jequitinhonha e Macury - UFVJM, School of Dentistry, Department of Pediatric Dentistry and Orthodontics, Diamantina, MG, Brazil.
    The aim of this study was to evaluate the correlation between the Child Perceptions Questionnaire 8 to 10 (CPQ8-10) and child-Oral Impact on Daily Performances (child-OIDP) indexes according to their total and item scores, as well as assess the discriminative validity of these assessment tools regarding dental caries and malocclusion among schoolchildren. A sample of 300 children aged between 8 and 10 years answered the questionnaires in two distinct steps. First, half of the sample (G1 = 150) answered the CPQ8-10 and the other half (G2 = 150) answered the child-OIDP. Read More

    Gingival crevicular fluid oxidative stress level in patients with periodontal disease and hyperlipidemia.
    Braz Oral Res 2017 Dec 18;31:e110. Epub 2017 Dec 18.
    Ondokuz Mayis University Faculty of Medicine, Department of Medical Biochemistry, Samsun, Turkey.
    This study aimed to assess the impact of hyperlipidemia on healthy and diseased periodontal tissue by evaluating oxidative stress biomarkers in gingival crevicular fluid (GCF). Clinical periodontal parameters and blood serum lipid, GCF malondialdehyde (MDA), protein carbonyl (PC), and total antioxidant capacity (TAOC) levels were evaluated in six age and sex-matched groups (n = 15 each) of normolipidemic and hyperlipidemic individuals as follows: normolipidemic + periodontally healthy (H), normolipidemic + gingivitis (G), normolipidemic + chronic periodontitis (CP), hyperlipidemic + periodontally healthy (HH), hyperlipidemic + gingivitis (HG), and hyperlipidemic + CP (HCP). GCF MDA, and PC levels varied among groups, with patients with periodontitis having the highest MDA and PC levels [CP > G > H (p < 0. Read More

    Microtensile bond strength of CAD/CAM materials to dentin under different adhesive strategies.
    Braz Oral Res 2017 Dec 18;31:e109. Epub 2017 Dec 18.
    Pontifícia Universidade Católica da Universidade Federal do Rio Grande do Sul - PUC-RS, School of Dentistry, Graduate Program, Porto Alegre, RS, Brazil.
    The present study aimed to evaluate the microtensile bond strength (μTBS) of novel computer-aided design/computer-aided manufacturing (CAD/CAM) restorative materials to dentin using different adhesive strategies. Thirty-two crowns were milled using CAD/CAM materials (Vita Mark II as control, Vita Suprinity, Vita Enamic and Lava Ultimate) and luted to dentin using different resin cements (RelyX ARC, RelyX Unicem 2 and RelyX Ultimate). The specimens were stored in 100% relative humidity at 37°C for 24 h and sectioned. Read More

    Culture-dependent approaches to explore the prevalence of root canal pathogens from endodontic infections.
    Braz Oral Res 2017 Dec 18;31:e108. Epub 2017 Dec 18.
    Tehran University of Medical Sciences, Department of Microbiology, School of Medicine, Tehran, Iran.
    Endodontic infections are considered to be caused by the presence of various microorganisms within the root canal system. Recognition of this microbiota contributes to the successful treatment of infected root canals. This study investigated the microorganisms associated with primary and secondary endodontic infections via culture methods, biochemical tests, and molecular approaches in an Iranian population. Read More

    The analgesic effect of photobiomodulation therapy (830 nm) on the masticatory muscles: a randomized, double-blind study.
    Braz Oral Res 2017 Dec 18;31:e107. Epub 2017 Dec 18.
    Universidade de São Paulo, School of Dentistry, Department of Stomatology, São Paulo, SP, Brazil.
    This study assesses the efficacy of photobiomodulation therapy (830 nm) for myalgia treatment of masticatory muscles. Sixty patients with muscular myalgia were selected and randomly allocated into 2 groups (n=30): Group A comprised patients given a placebo (control), and Group B consisted of those undergoing photobiomodulation therapy (PBMT). PBMT and placebo were applied bilaterally to specific points on the masseter and temporal muscles. Read More

    Analysis of CD57+ natural killer cells and CD8+ T lymphocytes in periapical granulomas and radicular cysts.
    Braz Oral Res 2017 Dec 18;31:e106. Epub 2017 Dec 18.
    Universidade Federal do Rio Grande do Norte - UFRN, Postgraduate Program in Oral Pathology, Natal, RN, Brazil.
    The aim of this study was to compare the number of CD57+ natural killer (NK) cells and CD8+ T lymphocytes between periapical granulomas (PGs) and radicular cysts (RCs). Twenty-fives cases of PGs and 25 of RCs were submitted to histological analysis and immunohistochemistry using anti-CD57 and anti-CD8 biomarkers. Positive cells were counted in 10 fields (400× magnification) and the median value was calculated for each case. Read More

    Health-related quality of life of patients with squamous cell carcinoma: a comparison according to tumor location.
    Braz Oral Res 2017 Dec 18;31:e105. Epub 2017 Dec 18.
    Instituto Federal do Paraná, Londrina, PR, Brazil.
    The aim of this study was to evaluate the health-related quality of life (QOL) of patients with squamous cell carcinoma (SCC) according to tumor location. The sample consisted of 27 patients with primary SCC in the oral cavity (n = 15), pharynx (n = 7), and larynx (n = 5) who were undergoing cancer treatment at the Cancer Hospital of Londrina, regardless of age, sex, clinical stage, and type of antineoplastic treatment. Health-related QOL was evaluated using the 30-item Cancer-Quality of Life Questionnaire (QLQ-C30), the 35-item Head and Neck Cancer-Quality of Life Questionnaire (QLQ-HN35), and the University of Washington Quality of Life Questionnaire (UW-QOL). Read More

    Biostimulatory effects of simvastatin on MDPC-23 odontoblast-like cells.
    Braz Oral Res 2017 Dec 18;31:e104. Epub 2017 Dec 18.
    Universidade Estadual Paulista "Júlio de Mesquita Filho" - Unesp, School of Dentistry, Department of Physiology and Pathology, São Paulo State University (Unesp), School of Dentistry, Araraquara, SP, Brazil.
    The aim of this study was to evaluate the bioactivity and cytocompatibility of simvastatin (SV) applied to MDPC-23 odontoblast-like cells. For this purpose, MDPC-23 cells were seeded in 96-well plates and submitted to treatments with 0.01 or 0. Read More

    Treg and Th17 cells in inflammatory periapical disease: a systematic review.
    Braz Oral Res 2017 Dec 18;31:e103. Epub 2017 Dec 18.
    Universidade Federal de Minas Gerais - UFMG, School of Dentistry, Department of Pediatric Dentistry and Orthodontics, Belo Horizonte, MG, Brazil.
    The process involved in periapical lesions, which occur as an outcome of pulpal necrosis, is regulated by the immune system including regulatory T cells (Treg) and T helper 17 cell (Th17) responses. The objective of this study was to conduct a frequency systematic review to determine the presence of Treg/Th17 responses and the influence of these cells in the progression of chronic inflammatory periapical lesions in humans. A systematic computerized search was carried out in Pubmed, Medline, Web of Science and Scopus electronic databases from their date of inception through the first week of May 2017. Read More

    Oral health assessment for users of marijuana and cocaine/crack substances.
    Braz Oral Res 2017 Dec 18;31:e102. Epub 2017 Dec 18.
    Universidade Federal de Santa Catarina - UFSC, Health Science Centre, Department of Stomatology, Florianópolis, SC, Brazil.
    The objective of this study was to assess the oral health status of users of illicit drugs such as marijuana and cocaine/crack and compare it with individuals not using these chemical substances. Questionnaires were applied to 35 illicit drugs users to gather information on demographic status, general health, and use of drugs. Then, a clinical assessment of the oral health condition was performed to collect data on decayed, missing and filled teeth (DMFT) index, salivary flow rate (SFR), and mucosal lesions. Read More

    Materials used for indirect pulp treatment in primary teeth: a mixed treatment comparisons meta-analysis.
    Braz Oral Res 2017 Dec 18;31:e101. Epub 2017 Dec 18.
    Universidade Federal de Santa Maria, Graduate Program in Dental Science, Santa Maria, RS, Brazil.
    This study aimed to systematically review the literature to address the question regarding the influence of different materials in the clinical and radiographic success of indirect pulp treatment in primary teeth. A literature search was carried out for articles published prior to January 2017 in PubMed/MEDLINE, CENTRAL, Scopus, TRIP and ClinicalTrials databases; relevant articles included randomized clinical trials that compared materials used for indirect pulp treatment in primary teeth. Two reviewers independently selected the studies and extracted the data. Read More

    Is there correlation between polymerization shrinkage, gap formation, and void in bulk fill composites? A μCT study.
    Braz Oral Res 2017 Dec 18;31:e100. Epub 2017 Dec 18.
    Universidade Federal do Maranhão - UFMA, Department of Dentistry I, São Luís, MA, Brazil.
    This in vitro study aimed to evaluate the volume of polymerization shrinkage (VS), gap (VG), and void (VV) using computerized microtomography (μCT) in bulk fill resin composites and conventional class I restorations, and to establish a correlation between these factors. Class I cavities (4 x 5 x 4 mm), C-factor = 4.2, were performed on caries-free human third molars and randomly divided into five groups (n = 6): FSI (Filtek Supreme XTE incremental insertion); FSS [(Filtek Supreme XTE single insertion(SI)]; TBF [(Tetric Bulk Fill: SI and manual filling (MF)]; SFM (Sonic Fill: SI/MF); and SFS (SonicFill: SI and sonic filling). Read More

    Reclassification and treatment of odontogenic keratocysts: A cohort study.
    Braz Oral Res 2017 Dec 18;31:e98. Epub 2017 Dec 18.
    Universidade de São Paulo - USP, School of Dentistry, Department of Oral & Maxillofacial Surgery, Traumatology and Prosthesis, São Paulo, SP, Brazil.
    The odontogenic keratocyst (OKC) is a recurrent cyst that has been recently reclassified from an odontogenic tumor to an odontogenic cyst. The aim of the present study was to investigate its treatment and address issues related to its association with nevoid basal cell carcinoma syndrome (NBCCS). Lesions from the cohort of patients included in the present study consisted of 40 OKCs, of which 27 lesions were treated by enucleation (GE) and 13 underwent decompression (GD). Read More

    P-glycoprotein expression in oral lichen planus.
    Braz Oral Res 2017 Dec 18;31:e95. Epub 2017 Dec 18.
    West Bengal State University, Department of Physiology, Kolkata, India.
    Oral lichen planus (OLP) is a stress induced inflammatory condition with malignant potency. The mdr1 (multidrug resistance) is a stress gene overexpressed in cancerous conditions and its translated form, the p-glycoprotein efflux transporter is usually overexpressed with chemotherapy, leading to chemoresistance. OLP, a lesion with carcinogenic potency, is broadly classified into the asymptomatic reticular form and the aggressive erosive form. Read More

    How has dental pulp stem cells isolation been conducted? A scoping review.
    Braz Oral Res 2017 Dec 18;31:e87. Epub 2017 Dec 18.
    Universidade Católica de Pelotas - UCPel, Program in Health and Behavior, Pelotas, RS, Brazil.
    The objective of this study was to realize a scoping review the literature in order to identify the profile of DPSCs isolation and analyze the possible risk factors that could change the native behavior of these cells. An initial search was conducted using the following MeSH terms: "(dental pulp stem cell [MeSH])"; "(dental pulp [MeSH])" AND "(stem cell [MeSH])"; "("dental pulp stem cell" [MeSH]")". The electronic search was done without date restriction up to and including April 2014, in PubMed, Scopus, Scielo and ISI Web of Knowledge databases. Read More

    Collagen sponge and rhBMP-2 improve socket healing in rats treated with zoledronic acid.
    Braz Oral Res 2017 Dec 7;31:e99. Epub 2017 Dec 7.
    Chosun University, School of Dentistry, Department of Oral and Maxillofacial Surgery, 375, SeoSukDong, DongGu, Gwangju 501-759, Republic of Korea.
    The aim of the present study was to evaluate the possible use of a commercial absorbed collagen sponge and bone morphogenetic protein (BMP) for the prevention of bisphosphonate-related osteonecrosis of the jaw (BRONJ) in rats. Twenty rats received intraperitoneal injections of 0.1-mg/kg of zoledronic acid three times a week for eight weeks before the extraction of both maxillary first molars after eight weeks. Read More

    Influence of implantoplasty on stress distribution of exposed implants at different bone insertion levels.
    Braz Oral Res 2017 Dec 7;31:e96. Epub 2017 Dec 7.
    Universidade Estadual Paulista - UNESP, Institute of Science and Technology, Department of Dental Materials and Prosthodontics, São José dos Campos, SP, Brazil.
    This study evaluated the effect of implantoplasty on different bone insertion levels of exposed implants. A model of the Bone Level Tapered implant (Straumann Institute, Waldenburg, Switzerland) was created through the Rhinoceros software (version 5.0 SR8, McNeel North America, Seattle, WA, USA). Read More

    Mechanical behavior of yttria-stabilized tetragonal zirconia polycrystal: Effects of different aging regimens.
    Braz Oral Res 2017 Dec 7;31:e94. Epub 2017 Dec 7.
    Universidade Federal de Santa Maria - UFSM, Faculty of Odontology, Prosthodontic Unit, Santa Maria, RS, Brazil.
    This study aimed to characterize and compare the effect of different aging regimens on surface characteristic (topography and roughness), structural stability (phase transformation) and mechanical performance (Weibull analysis) of a Y-TZP ceramic. Discs (15 × 1.2 mm; VITA In-Ceram YZ) were prepared according to ISO 6872-2015 for biaxial flexural strength testing and randomly assigned into five groups (n = 30): as-sintered, no aging treatment (CTRL); 20 h in autoclave at 134°C, 2 bar pressure (AUT); intermittent mechanical loading at 20 Hz/106 load pulses (MechLoad); AUT followed by MechLoad (AUT+MechLoad); and storage in distilled water at 37°C, for 1 year (STO). Read More

    In vitro analysis of a local polymeric device as an alternative for systemic antibiotics in Dentistry.
    Braz Oral Res 2017 Dec 7;31:e92. Epub 2017 Dec 7.
    Universidade de São Paulo - USP, Dental School, Department of Stomatology, São Paulo, SP, Brazil.
    The development of a biodegradable material with antimicrobial properties for local applications is required in the prevention and treatment of infectious diseases. The objective of this study was to produce blends of poly-L-lactide acid (PLLA) synthetic polymer associated with several antimicrobials, as an alternative in the prevention and treatment of infections, as well as to evaluate its cytotoxicity, release of antimicrobials and inhibit bacteria growth. Blends of PLLA added with 20% Amoxicillin, Metronidazole, Clindamycin or Azithromicyn were used to produce Films (F) or Meshs (M) by casting and electrospinning methods, respectively. Read More

    The implications of different lateral wall thicknesses on surgical access to the maxillary sinus.
    Braz Oral Res 2017 Nov 27;31:e97. Epub 2017 Nov 27.
    University of Malaya, Faculty of Dentistry, Department of Oral and Maxillofacial Clinical Sciences, Kuala Lumpur, Malaysia.
    The objective of this study was to measure the topographic thickness of the lateral wall of the maxillary sinus in selected Asian populations. Measurements were made on the lateral walls of maxillary sinuses recorded using CBCT in a convenient sample of patients attending an Asian teaching hospital. The points of measurement were the intersections between the axes along the apices of the canine, first premolar, and second premolar and along the mesiobuccal and distobuccal apices of the first and second molars and horizontal planes 10 mm, 20 mm, 30 mm and 40 mm beneath the orbital floor. Read More

    The use of tools to support oral lesion description in oral medicine referrals.
    Braz Oral Res 2017 Nov 27;31:e93. Epub 2017 Nov 27.
    Universidade Federal de Santa Catarina - UFSC, Department of Pathology, Clinic of Stomatology, Florianópolis, SC, Brazil.
    Poor description of oral lesions jeopardize the prioritization of appointments in Oral Medicine. The present study investigated whether the use of support tools changes the quality of descriptions focusing on health care prioritization. Two oral lesions (A and B) were described by 64 dental students and 48 dentists using three methods: (a) without support tools (free); (b) using the oral examination form from the Specialties Manual in Oral Health/Brazilian Ministry of Health (SMOH form); and (c) using the OralDESC guideline. Read More

    Glycemic control and adipokines after periodontal therapy in patients with Type 2 diabetes and chronic periodontitis.
    Braz Oral Res 2017 Nov 27;31:e90. Epub 2017 Nov 27.
    Wuhan University, School & Hospital of Stomatology, Wuhan, China.
    The mechanism by which chronic periodontitis (CP) affects type 2 diabetes (T2DM) remains unclear. Therefore, the aim of this study is to evaluate the effects of periodontal therapy (PT) on the glycemic control and adipokines of patients with T2DM and CP with the purpose of elucidating the possible mechanisms by which CP influences T2DM. Forty-four patients with T2DM and CP were randomly divided into two groups according to whether they underwent PT. Read More

    Influence of biofilm formation on the mechanical properties of enamel after treatment with CPP-ACP crème.
    Braz Oral Res 2017 Nov 27;31:e84. Epub 2017 Nov 27.
    Universidade Federal Fluminense - UFF, School of Dentistry, Niterói, RJ, Brazil.
    The study aimed to investigate the effects of bacterial biofilms on changes in the surface microhardness of enamel treated with casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) with and without fluoride. Human enamel blocks with incipient caries-like lesions were divided into four groups of 13: G1: Saliva (Control); G2: fluoride dentifrice (Crest™, 1100 ppm as NaF); G3: CPP-ACP (MI Paste; Recaldent™); and G4: CPP-ACPF (MI Paste Plus; Recaldent™ 900 ppm as NaF). The specimens were soaked in demineralizing solution for 6 h and remineralized in artificial saliva for 18 h alternately for 10 days. Read More

    Clinical performance of fluorescence-based methods for detection of occlusal caries lesions in primary teeth.
    Braz Oral Res 2017 Nov 6;31:e91. Epub 2017 Nov 6.
    Universidade de São Paulo - USP, School of Dentistry, Department of Orthodontics and Pediatric Dentistry, São Paulo, SP, Brazil.
    We aimed to investigate the performance of fluorescence-based methods (FBMs), compared to visual inspection after histological validation, in detecting and assessing the activity status of occlusal carious lesions in primary teeth. One examiner evaluated 50 primary molars close to exfoliation in 24 children. Teeth were assessed using quantitative light-induced fluorescence (QLF) and pen-type laser fluorescence (LFpen). Read More

    Cymbopogon citratus essential oil: effect on polymicrobial caries-related biofilm with low cytotoxicity.
    Braz Oral Res 2017 Nov 6;31:e89. Epub 2017 Nov 6.
    Universidade Estadual Paulista - Unesp, São José dos Campos Institute of Science and Technology, Department of Environmental Engineering, São José dos Campos , SP, Brazil.
    The objective of this study was to evaluate the effects of Cymbopogon citratus essential oil and its main compound (citral) against primary dental colonizers and caries-related species. Chemical characterization of the essential oil was performed by gas chromatography/mass spectroscopy (GC/MS), and the main compound was determined. Antimicrobial activity was tested against Actinomyces naeslundii, Lactobacillus acidophilus, S. Read More

    One year Survival Rate of Ketac Molar versus Vitro Molar for Occlusoproximal ART Restorations: a RCT.
    Braz Oral Res 2017 Nov 6;31:e88. Epub 2017 Nov 6.
    Universidade de São Paulo - USP, Dental School, Orthodontics and Pediatric Dentistry Department, São Paulo, SP, Brazil.
    Good survival rates for single-surface Atraumatic Restorative Treatment (ART) restorations have been reported, while multi-surface ART restorations have not shown similar results. The aim of this study was to evaluate the survival rate of occluso-proximal ART restorations using two different filling materials: Ketac Molar EasyMix (3M ESPE) and Vitro Molar (DFL). A total of 117 primary molars with occluso-proximal caries lesions were selected in 4 to 8 years old children in Barueri city, Brazil. Read More

    In situ effect of titanium tetrafluoride varnish on enamel demineralization.
    Braz Oral Res 2017 Nov 6;31:e86. Epub 2017 Nov 6.
    Universidade Federal do Rio de Janeiro - UFRJ, Rio de Janeiro Dental School, Department of Pediatric Dentistry and Orthodontics, Rio de Janeiro, RJ, Brazil.
    The effect of a 4% titanium tetrafluoride (TiF 4 ) varnish on enamel demineralization was evaluated. Twelve volunteers participated in this double-blind, randomized crossover study. Six enamel specimens were positioned in intraoral appliances throughout four treatment stages: 4% TiF 4 varnish (experimental varnish), 5% sodium fluoride (NaF) varnish (Duraphat ® ), placebo varnish, and negative control (deionized water). Read More

    Maternal depression and anxiety associated with dental fear in children: a cohort of adolescent mothers in Southern Brazil.
    Braz Oral Res 2017 Nov 6;31:e85. Epub 2017 Nov 6.
    Universidade Federal de Pelotas - UFPel, Post-Graduate Program in Dentistry, Pelotas, RS, Brazil.
    Exposure to maternal symptoms of depression/anxiety has long-term negative consequences for child development, regardless of the contextual risk. The objective of this study was to investigate the relationship of the symptomatology of persistent maternal depression and anxiety with child dental fear. This study was nested in a cohort of adolescent mothers in southern Brazil. Read More

    Is obesity associated to dental caries in Brazilian schoolchildren?
    Braz Oral Res 2017 Nov 6;31:e83. Epub 2017 Nov 6.
    Universidade Federal de Pelotas, Graduate Program in Dentistry, Pelotas, Brazil.
    This cross-sectional study aimed to determine the association between dental caries and weight status, and between dental caries and physical activity in Brazilian schoolchildren aged 8 to 12 years. A multi-stage sample of children enrolled in 20 private and public schools in 2010 in Pelotas, Southern Brazil, were invited to participate in the study. Socioeconomic data were collected from parents, and data regarding children characteristics were collected from children using a questionnaire and anthropometric measures. Read More

    Effect of ceramic thickness, grinding, and aging on the mechanical behavior of a polycrystalline zirconia.
    Braz Oral Res 2017 Nov 6;31:e82. Epub 2017 Nov 6.
    Universidade Federal de Santa Maria - UFSM, Faculty of Odontology, Prosthodontics Units, Santa Maria, RS, Brazil.
    Monolithic restorations of Y-TZP have been recommended as a restorative alternative on prosthetic dentistry as it allows a substantial reduction of ceramic thickness, which means a greater preservation of tooth structure. However, the influence of grinding and aging when using a thinner layer of the material is unclear. This investigation aimed to evaluate and compare the effects of ceramic thickness (0. Read More

    BiodentineTM is cytocompatible with human primary osteoblasts.
    Braz Oral Res 2017 Sep 28;31:e81. Epub 2017 Sep 28.
    Universidade Federal Fluminense - UFF, Department Cell and Molecular Biology, Niteroi, RJ, Brazil.
    Calcium silicate-based materials have been widely studied due to their resemblance to, and similar applicability of, mineral trioxide aggregate (MTA). Among these, Biodentine™ (BD) was specifically designed as a "dentin replacement" material for applications such as root perforations, apexification, treatment of resorptive lesions, and as a retrograde filling material. The present study aimed to assess the in vitro response of human primary osteoblasts to BD using MTA AngelusTM as a reference material, by simultaneously analyzing three different cell viability parameters, namely mitochondrial activity, membrane integrity, and cell density. Read More

    Water sorption and solubility of bulk-fill composites polymerized with a third generation LED LCU.
    Braz Oral Res 2017 Sep 28;31:e80. Epub 2017 Sep 28.
    Ondokuz Mayıs University, Faculty of Dentistry, Department of Restorative Dentistry, Samsun, Turkey.
    The aim of this study was to compare the degree of water sorption and solubility in bulk-fills after curing with a polywave light source. A total of 120 disc-shaped specimens (8 mm diameter; 4 mm depth) were prepared from three regular bulk-fill materials (X-tra Fil, Tetric N-Ceram Bulk Fill, SonicFill), and a control material (Filtek Z250), cured in 3 different modes (standard: 1000 mW/cm2-20 s; high power: 1400 mW/cm2-12 s; xtra power: 3200 mW/cm2-6 s) using a third generation light-emitting diode light curing unit. Water sorption and solubility levels of the specimens were measured according to the ISO 4049:2009 specification after storing in distilled water for 30 days. Read More

    Caries experience and salivary aspects in individuals with fragile X syndrome.
    Braz Oral Res 2017 Sep 28;31:e79. Epub 2017 Sep 28.
    São Leopoldo Mandic Institute and Research Center, Departament of Oral Pathology, Campinas, SP, Brazil.
    Fragile X syndrome (FXS) is the most common cause of hereditary mental retardation, but studies on the oral health condition of these patients are rare. The aim of this study was to determine the experience of dental caries in individuals with FXS, by examining the saliva profile, oral hygiene, socioeconomic characteristics and use of controlled drugs in these patients. Dental health was estimated using the decayed, missing and filled teeth index (DMF-T) and sialometry, and the pH value and buffering capacity of the saliva, colony forming units of S. Read More

    Salivary stress biomarkers and anxiety symptoms in children with and without temporomandibular disorders.
    Braz Oral Res 2017 Sep 28;31:e78. Epub 2017 Sep 28.
    Universidade Federal de São Paulo - Unifesp, Department of Pharmaceutical Sciences, Diadema, SP, Brazil.
    The etiology of temporomandibular disorders (TMD), which are considered as a heterogeneous group of psychophysiological disturbances, remains a controversial issue in clinical dentistry. This study aimed to evaluate whether the salivary alpha-amylase (sAA), cortisol levels, and anxiety symptoms differ between children with and without TMD. Initially, 316 young subjects were screened in public schools (nonreferred sample); 76 subjects aged 7-14 years were selected and comprised the TMD and control groups with 38 subjects each matched by sex, age, and the presence/absence of sleep bruxism. Read More

    Suppressor of cytokine signaling 1 expression during LPS-induced inflammation and bone loss in rats.
    Braz Oral Res 2017 Sep 28;31:e75. Epub 2017 Sep 28.
    Universidade Estadual Paulista - UNESP, School of Dentistry at Araraquara, Department of Diagnosis and Surgery, Araraquara, SP, Brazil.
    This study aimed to characterize the dynamics of suppressor of cytokine signaling (SOCS1) expression in a rat model of lipopolysaccharide-induced periodontitis. Wistar rats in the experimental groups were injected three times/week with LPS from Escherichia coli on the palatal aspect of the first molars, and control animals were injected with vehicle (phosphate-buffered saline). Animals were sacrificed 7, 15, and 30 days after the first injection to analyze inflammation (stereometric analysis), bone loss (macroscopic analysis), gene expression (qRT-PCR), and protein expression/activation (Western blotting). Read More

    Noncontact three-dimensional evaluation of surface alterations and wear in NiTi endodontic instruments.
    Braz Oral Res 2017 Sep 28;31:e74. Epub 2017 Sep 28.
    Universidade Federal Fluminense - UFF, Department of Endodontics, Niteroi, RJ, Brazil.
    The aim of this study was to undertake a qualitative and quantitative assessment of nanoscale alterations and wear on the surfaces of nickel-titanium (NiTi) endodontic instruments, before and after use, through a high-resolution, noncontact, three-dimensional optical profiler, and to verify the accuracy of the evaluation method. Cutting blade surfaces of two different brands of NiTi endodontic instruments, Reciproc R25 (n = 5) and WaveOne Primary (n = 5), were examined and compared before and after two uses in simulated root canals made in clear resin blocks. The analyses were performed on three-dimensional images which were obtained from surface areas measuring 211 × 211 µm, located 3 mm from their tips. Read More

    Polymerization shrinkage stress of composite resins and resin cements - What do we need to know?
    Braz Oral Res 2017 Aug 28;31(suppl 1):e62. Epub 2017 Aug 28.
    University of Tennessee Health Science Center, College of Dentistry, Department of Bioscience Research, TN, United States of America.
    Polymerization shrinkage stress of resin-based materials have been related to several unwanted clinical consequences, such as enamel crack propagation, cusp deflection, marginal and internal gaps, and decreased bond strength. Despite the absence of strong evidence relating polymerization shrinkage to secondary caries or fracture of posterior teeth, shrinkage stress has been associated with post-operative sensitivity and marginal stain. The latter is often erroneously used as a criterion for replacement of composite restorations. Read More

    Light curing in dentistry and clinical implications: a literature review.
    Braz Oral Res 2017 Aug 28;31(suppl 1):e61. Epub 2017 Aug 28.
    Dalhousie University, Faculty of Dentistry, Department of Dental Clinical Sciences, Halifax, NS, Canada.
    Contemporary dentistry literally cannot be performed without use of resin-based restorative materials. With the success of bonding resin materials to tooth structures, an even wider scope of clinical applications has arisen for these lines of products. Understanding of the basic events occurring in any dental polymerization mechanism, regardless of the mode of activating the process, will allow clinicians to both better appreciate the tremendous improvements that have been made over the years, and will also provide valuable information on differences among strategies manufacturers use to optimize product performance, as well as factors under the control of the clinician, whereby they can influence the long-term outcome of their restorative procedures. Read More

    Randomized clinical trials of dental bleaching - Compliance with the CONSORT Statement: a systematic review.
    Braz Oral Res 2017 Aug 28;31(suppl 1):e60. Epub 2017 Aug 28.
    Universidade Estadual de Ponta Grossa - UEPG, School of Dentistry, Department of Restorative Dentistry, Ponta Grossa, Paraná, Brazil.
    We reviewed the literature to evaluate: a) The compliance of randomized clinical trials (RCTs) on bleaching with the CONSORT; and b) the risk of bias of these studies using the Cochrane Collaboration risk of bias tool (CCRT). We searched the Cochrane Library, PubMed and other electronic databases, to find RCTs focused on bleaching (or whitening). The articles were evaluated in compliance with CONSORT in a scale: 0 = no description, 1 = poor description and 2 = adequate description. Read More

    Efficiency of polymerization of bulk-fill composite resins: a systematic review.
    Braz Oral Res 2017 Aug 28;31(suppl 1):e59. Epub 2017 Aug 28.
    Universidade de Guarulhos - UNG, Dental Research and Graduate Studies Division, Department of Restorative Dentistry, Guarulhos, SP, Brazil.
    This systematic review assessed the literature to evaluate the efficiency of polymerization of bulk-fill composite resins at 4 mm restoration depth. PubMed, Cochrane, Scopus and Web of Science databases were searched with no restrictions on year, publication status, or article's language. Selection criteria included studies that evaluated bulk-fill composite resin when inserted in a minimum thickness of 4 mm, followed by curing according to the manufacturers' instructions; presented sound statistical data; and comparison with a control group and/or a reference measurement of quality of polymerization. Read More

    Dental ceramics: a review of new materials and processing methods.
    Braz Oral Res 2017 Aug 28;31(suppl 1):e58. Epub 2017 Aug 28.
    Universidade de São Paulo - USP, School of Dentistry, Department of Biomaterials and Oral Biology, São Paulo, SP, Brazil.
    The evolution of computerized systems for the production of dental restorations associated to the development of novel microstructures for ceramic materials has caused an important change in the clinical workflow for dentists and technicians, as well as in the treatment options offered to patients. New microstructures have also been developed by the industry in order to offer ceramic and composite materials with optimized properties, i.e. Read More

    Bonding efficiency and durability: current possibilities.
    Braz Oral Res 2017 Aug 28;31(suppl 1):e57. Epub 2017 Aug 28.
    GC Europe N.V., Professional Services Manager, Scientific Affairs, Leuven, Belgium.
    Bonding plays a major role in dentistry nowadays. Dental adhesives are used in association with composites to solve many restorative issues. However, the wide variety of bonding agents currently available makes it difficult for clinicians to choose the best alternative in terms of material and technique, especially when different clinical situations are considered. Read More

    Should my composite restorations last forever? Why are they failing?
    Braz Oral Res 2017 Aug 28;31(suppl 1):e56. Epub 2017 Aug 28.
    Radboud University Medical Center, Radboud Institute for Health Sciences, Department of Dentistry, Nijmegen, The Netherlands.
    Composites resins have become the first choice for direct anterior and posterior restorations. The great popularity is related to their esthetic appearance and reduced need of sound tissue removal as compared with former treatments. Several studies have demonstrated that composite restorations may last long in clinical service. Read More

    Trends in restorative composites research: what is in the future?
    Braz Oral Res 2017 Aug 28;31(suppl 1):e55. Epub 2017 Aug 28.
    Universidade de São Paulo - USP, School of Dentistry,Department of Biomaterials and Oral Biology, São Paulo, SP, Brazil.
    Clinical trials have identified secondary caries and bulk fracture as the main causes for composite restoration failure. As a measure to avoid frequent reinterventions for restoration replacement, composites with some sort of defense mechanism against biofilm formation and demineralization, as well as materials with lower susceptibility to crack propagation are necessary. Also, the restorative procedure with composites are very time-consuming and technically demanding, particularly concerning the application of the adhesive system. Read More

    Effect of rewetting solutions on micropush-out dentin bond strength of new bioceramic endodontic material.
    Braz Oral Res 2017 Aug 31;31:e76. Epub 2017 Aug 31.
    Universidade Ceuma - UNICEUMA, São Luis, MA, Brazil.
    To evaluate the influence of rewetting solutions on bond strength to root dentin of conventional gutta-percha (GP) or niobium phosphate glass-based gutta-percha (GNb) associated with a bioceramic sealer. The root canals of 80 human mandibular premolars were prepared using nickel-titanium instruments and irrigation with sodium hypochlorite and EDTA. The teeth were randomly divided into four groups according to the gutta-percha used: GNb or GP associated with EndoSequence BC Sealer (BC) and the solution for rewetting dentin before filling (distilled water; phosphate buffer saline solution - PBS; simulated body fluid - SBF; or no solution). Read More

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