Radiographic evaluation of mandibular third molars: an ex vivo comparative study between multilayer and conventional panoramic radiography.

Objectives: To compare the multilayer panoramic radiography (MPAN) and conventional panoramic radiography (CPAN) in the evaluation of mandibular third molars using cone-beam computed tomography (CBCT) as a reference.

Methods: CPAN, MPAN, and CBCT scans from 33 dry human mandibles were acquired using the OP300 Maxio unit, totalizing 56 mandibular third molars to be evaluated. Three examiners evaluated each third molar according to their position, depth of impaction in the mandibular ramus, proximity between the dental root apexes and the mandibular canal, and the presence of radiographic signs of proximity to the mandibular canal.

Factors associated with the proportion of abnormal results in screening mammograms: ecological study.

Objective: To analyze the factors associated with the proportion of abnormal results in screening mammograms.

Methods: Ecological study, with data from DATASUS/SISCAN, Atlas Brasil do Desenvolvimento Humano, Fundação SEADE, and Sistema e-Gestor, from 2016 to 2019, of women aged 50 to 69 years in the 645 municipalities of São Paulo (Brazil). Independent variables were associated with the outcome: proportion of unsatisfactory coverage of abnormal test results (Breast Imaging Reporting and Data System - BI-RADS® 0, 4 and 5 proportion >10% of tests performed).

Longitudinal study for dental caries calibration of dentists unexperienced in epidemiological surveys.

This study aimed to make a longitudinal analysis of interexaminer calibration reproducibility in diagnosing dental caries in posterior teeth, by examiners without previous experience in epidemiological studies. A group of 11 inexperienced examiners underwent theoretical-practical training and calibration assessments, assisted by a standard examiner. An examiner who did not participate directly in the research selected 5-year-old children with and without caries.

Size effect in observational studies in Public Oral Health: importance, calculation and interpretation.

The objective of this study was to analyze the scientific literature in public oral health regarding calculation, presentation, and discussion of the effect size in observational studies. The scientific literature (2015 to 2019) was analyzed regarding: a) general information (journal and guidelines to authors, number of variables and outcomes), b) objective and consistency with sample calculation presentation; c) effect size (presentation, measure used and consistency with data discussion and conclusion). A total of 123 articles from 66 journals were analyzed.

Effect of bleaching gels with different thickeners under normal and hyposalivation conditions: in situ study.

Background: Bleaching gel thickeners induce important changes in tooth enamel and these changes are reversed by saliva.

Objective: This in situ study aimed to evaluate the effect of bleaching gels with different thickeners on tooth enamel under normal and hyposalivation conditions.

Methodology: Of 28 participants, 14 had normal salivary flow and 14 had low salivary flow.

How Does Ambient Light Affect the Image Quality of Phosphor Plate Digital Radiography? A Quantitative Analysis Using Contemporary Digital Radiographic Systems.

The aim of this study is to quantitatively evaluate the influence of the duration of ambient light exposure on the image quality of digital radiographs obtained with contemporary phosphor plate (PSP)-based systems. Radiographs of an aluminum step-wedge were obtained using VistaScan and Express systems at five X-ray exposure times: 0.10, 0.

Repercussions of the COVID-19 epidemic on Brazilian National Health System urgent dental care in Piracicaba, Brazil, 2020.

Objective: To evaluate the repercussions of the COVID-19 pandemic on procedures performed by a public urgent dental care service (PUDS).

Methods: This was a cross-sectional study, using data from the PUDS in Piracicaba, SP, Brazil, prior to the pandemic (February-March 2020) and during the pandemic (March-April 2020). Differences in the care profile between the pre-COVID-19 period and the COVID-19 period, according to sex, age and dental procedures were analyzed using Pearson's Chi-square test.

[Resolvability of primary care in oral health in the State of Paraíba, Brazil].

Oral health resolvability in primary care of municipalities in the State of Paraíba, Brazil, was analyzed, and a cross-sectional study was conducted, using an inductive approach, comparative procedure and indirect documentation. The Resolvability Indicator (RI) consisted of the ratio between the number of Completed Treatments and First Programmatic Dental Consultations in municipalities in Paraíba (n = 223), between 2011 and 2014, by using data collected from the DATASUS/TABNET platform. The following explanatory variables were considered: Coverage of First Programmatic Dental Consultation (CFPDC), Coverage of Primary Care Teams (CPCT), Coverage of Oral Health Teams (COHT), Coverage of Family Health Teams (CFHT), Percentage of Tooth Extraction (PTE), Gross Domestic Product (GDP), Municipal Human Development Index (MHDI) and Gini Coefficient (GC).

Overdentures as an alternative to conventional dentures: a micro-costing analysis for Public Health Service in Brazil.

This study aimed to estimate cost and compatibility with public financial incentives of two technologies for treating the edentulous mandible: lower complete dentures (CD) and overdentures retained by two dental implants (OD). This study consisted of a partial economic evaluation, with a micro-costing bottom-up approach for the calculation of direct costs. The estimates involved the number of consultations, proportion of materials, equipment, instruments' lifetime, and human resources, described in the price panel website of the Ministry of Economy in Brazil.

Effect of tooth bleaching and application of different dentifrices on enamel properties under normal and hyposalivation conditions: an in situ study.

Objective: The purpose of this in situ study was to evaluate different dentifrices on enamel after bleaching under normal and hyposalivatory conditions.

Materials And Methods: Twenty-four participants were assigned of which 12 had normal and 12 had low salivary flow. The study was conducted in 6 in situ experimental phases of 24 h duration: placebo, NaF, SnF, F/Sn/Chitosan, F/Arginine, and F/Bioactive Glass.

Analysis of enamel/restoration interface submitted cariogenic challenge and fluoride release.

The treatment of high-risk patients still is a challenge. The understanding and development non-invasive, non-destructive, and non-ionizing techniques, can help to guide the treatment and the diagnosis of primary and recurrent caries. The present study evaluated the behavior of enamel/restoration interface after a cariogenic challenge by Fourier domain optical coherence tomography (FD-OCT), scanning electron microscopy (SEM) examination, and the fluoride release of the different restorative materials.

Determinants of adherence to dental treatment of socially vulnerable adolescents: a cohort study.

Objective: Different studies with adolescents address the difficulty they have to adhere to oral dental treatments. Therefore, better understanding the processes involved in adherence to treatment in this population is necessary. The aim of this study was to investigate the factors that influence adherence to dental treatment in socially underprivileged adolescents in primary care.

Use of Water by Schoolchildren: Impact of Indirectly Supervised Daily Toothbrushing-A Pilot Study.

Aim: This present longitudinal, quantitative, and analytical pilot study evaluated the impact of daily indirectly supervised toothbrushing on water consumption.

Materials And Methods: The study was carried out in a social center that provided care to children aged 5-14 years in Campinas in the state of São Paulo. Calibrated hydrometers were installed on taps used by the children, and the daily volume of water used was measured for 25 school days (T0).

Influence of voxel size on cone beam computed tomography artifacts arising from the exomass.

Objectives: The objective of this study was to evaluate the influence of voxel size on artifacts arising from the exomass in cone beam computed tomography (CBCT).

Study Design: An imaging phantom was scanned using 2 CBCT units, each adjusted to 2 voxel sizes: 0.2 and 0.

Volumetric evaluation of temporomandibular joints in patients with a chewing-side preference: a CBCT study.

This study evaluated the influence of chewing-side preference on the volume of the mandibular condyle and coronoid process and the dynamic parameters of the temporomandibular joint (TMJ). Cone beam computed tomographic scans of both TMJs of 90 individuals with a chewing-side preference were obtained while the patients were in the closed-mouth and maximum mouth-opening positions (test power ≥ 0.80).

Impact of dietary acids on the surface roughness and morphology of composite resins.

This in vitro study was performed to evaluate the surface roughness (Ra) and morphology by scanning electron microscopy (SEM) of composite resins that had been stored in acidic solutions typical of those present in the diet. Three composite resins (4 Seasons, Z250, and P90) were selected and divided into three groups (n = 7) according to the solutions tested: G1: distilled water; G2, Coca-cola, and G3: orange juice. The Ra test was repeated after immersion periods of 15, 90, and 180 days.

Expectation of parental control and the maintenance of bottle-feeding in childhood.

Objective: To investigate association between parental locus of control (belief of individuals about what or who has control of the events of their lives) and bottle feeding habits among children from 3 to 5 years of age.

Methodology: Parental locus of control validated in Brazil, and semi-structured questionnaire to obtain sociodemographic, health, and oral habit behaviors was applied to mothers of 992 preschool children. Outcome variable "use of feeding bottle" was studied according to the time of its use (≤36 months and >36 months).

Social capital and factors associated with the caries experience in adults - a population-based study in Brazil.

The objective of this study was to investigate the experience of caries related to social capital and associated factors in adults in large-scale population-based study. A Cross-sectional study was performed in 163 municipalities in the State of São Paulo, Brazil (SBSP-2015). 17,560 people were evaluated, of which 6051 were adults aged 35-44 years.

Self-perceived dental treatment need among adolescents: A hierarchical analysis.

Objectives: The aim of the present study was to analyse the factors associated with self-perceived need for dental treatment among adolescents.

Methods: A representative sample in the state of São Paulo, Brazil, comprising 5558 adolescents, was evaluated in 2015. The adolescents were selected by probabilistic sampling by conglomerates in two stages.

Influence of cigarette smoke combined with different toothpastes on enamel erosion.

This in vitro study aimed to evaluate the effect of different toothpastes on dental enamel subjected to an erosive cycle with and without exposure to cigarette smoke. Bovine enamel specimens were randomly allocated into 12 groups (n = 12). For the in vitro simulation of smoking, half the groups underwent an exposure cycle of 20 cigarettes per day for 5 days.

Effect of ammonium acryloyldimethyltaurate copolymer on the physical and chemical properties of bleached dental enamel.

Objective: To analyze the effect of bioadhesive polymer, Aristoflex® AVC, on enamel physical and chemical properties.

Materials And Methods: Bovine enamel blocks were divided into CP 10% with carbopol-Whiteness Perfect® (WP-FGM), CP 10% with Aristoflex (A + CP 10%), CP 10% with carbopol (C + CP 10%), Aristoflex (A), carbopol (C), carbamide peroxide 10% (CP 10%) and control (no treatment). The treatment was performed for 4 h during 14 days.

Exploring the perception of orthodontic treatment need using the Dental Aesthetic Index and Index of Orthodontic Treatment Need.

Introduction: This study aimed to explore the perception of orthodontic treatment need by using the Dental Aesthetic Index (DAI) and the Index of Orthodontic Treatment Need (IOTN).

Methods: A cross-sectional study was conducted on a representative random sample (N = 248) of adolescents aged 12 years. The DAI and both components of IOTN were used to evaluate malocclusion.

Effects of sodium hypochlorite as dentin deproteinizing agent and aging media on bond strength of two conventional adhesives.

This study evaluated the effect of 10% sodium hypochlorite (NaOCl) as deproteinizing agent and storage media on bond strength (BS) of two etch-and-rinse adhesive systems to dentin. Twenty-eight sound extracted human third molars were divided in four groups (n = 7), according to dentin treatment (conventional etching or etching followed by 10% NaOCl application) and adhesive systems (GB-Gluma 2Bond and OS-One-Step). After dentin treatments and adhesive application, a composite block was built-up on dentin surface and teeth were serially sectioned to obtain bonded sticks specimens.

Effect of iontophoresis on fluoride uptake in enamel with artificial caries lesion.

Iontophoresis is a noninvasive technique, based on the application of a constant low-intensity electric current to facilitate the release of a variety of drugs, whether ionized or not, through biological membranes. The objective of this research was to evaluate the effect of iontophoresis using different electric current intensities on the uptake of fluoride in dental enamel with artificial caries lesions. In this in vitro operator-blind experiment, bovine enamel blocks (n = 10/group) with caries-like lesions and predetermined surface hardness were randomized into 6 groups: placebo gel without fluoride applied with a current of 0.

The relationship of articular eminence and mandibular fossa morphology to facial profile and gender determined by cone beam computed tomography.

Objective: The aim of this study was to evaluate the relationship of the morphology of the articular eminence and mandibular fossa to facial profile and sex by using cone beam computed tomography (CBCT) images.

Study Design: CBCT examinations of 76 patients were conducted, and the patients were classified according to facial profile as dolichocephalic, mesocephalic, or brachycephalic. The inclination and height of the articular eminence and the inclination of the mandibular fossa of 152 temporomandibular joints were measured.