Socket shield technique: Stress distribution analysis.

Background: To analyze through finite element analysis the stress distribution in peri-implant bone tissues, implants, and prosthetic components induced by the socket shield (SS) technique in comparison to other techniques used to treat tooth loss.

Materials And Methods: A three-dimensional model of a superior central incisor crown supported by implant was modeled and three different placement conditions were simulated: SS - 2.0-mm-thick root dentin fragment positioned between the alveolar buccal wall and implant; heterologous bone graft (HBG) - bovine bone graft positioned the alveolar buccal wall and implant; and control (C) - implant fully placed in bone tissue of a healed alveolus.

Effect of low-power diode laser on infected root canals.

This study evaluated the effect of photodynamic therapy (PDT) on infected root canals. Twenty-one human teeth were selected, and 18 were infected by E. faecalis for 60 days.

[Periodontal status of temporarily institutionalized homeless adults and associated factors].

The scope of this cross-sectional study was to describe the periodontal status and its association with sociodemographic, oral-health related behaviors and use of drugs among temporarily institutionalized homeless adults. The data were collected through oral clinical examination and a questionnaire with 102 adults attending the only public institution for this group in Goiânia, Goiás, Brazil. The periodontal condition was measured by the presence of bleeding on probing, dental calculus and pockets, according to the Community Periodontal Index (CPI).

Attitudes of dentists toward maintaining, repairing, or replacing direct composite resin restorations.

This study aimed to report the reasons for replacement of direct composite resin restorations in dental practices in Brazil. The study used a convenience sample of 213 dentists. A questionnaire was developed from previously validated instruments and sent electronically to prospective participants.

Satisfaction with oral health and associated factors among homeless people in Midwest Brazil.

Background: Self-perceived oral health has been extensively investigated, but studies on homeless people are scarce, and there is currently no evidence from Latin America.

Objective: To investigate the prevalence and factors associated with satisfaction with the oral health of homeless individuals in one Brazilian capital of the Midwest region.

Subject And Methods: A cross-sectional study was carried out with 351 adult individuals attending a temporary public shelter who were interviewed about sociodemographic and psychosocial aspects, drugs use and oral health.

Dental pain in adult and elderly homeless people: Prevalence, associated factors, and impact on the quality of life in Midwest Brazil.

Objectives: To investigate the prevalence and factors associated with dental pain and its impact on the quality of life of adult and elderly homeless people in Midwest Brazil.

Methods: A cross-sectional study was conducted with 353 individuals aged ≥18 attending a public homeless shelter in a Brazilian state capital (Goiânia). Data on sociodemographic, psychosocial, drug use and oral health-related factors, and quality of life [Oral Impact on Daily Performance scale (OIDP)] were collected through interviews.

Significance of immediate dentin sealing and flowable resin coating reinforcement for unfilled/lightly filled adhesive systems.

Background: Immediate dentin sealing implies applying an adhesive system to dentin directly after tooth preparation, before impression. The technique is universal (inlays, onlays, veneers, crowns) and well documented clinically and experimentally. Different types of dentin bonding agents (DBAs) are available on the market.

Untreated dental trauma among homeless people in Midwest Brazil.

Homeless people are usually more exposed to traumatic events that may cause dental injuries than those with more stable housing. Previous studies on the oral health condition of this population group have shown high levels of dental caries, periodontal diseases, and tooth loss, but evidence on dental trauma is scarce. Furthermore, there is no report from Latin American countries.

Evaluation of bond strength of molar orthodontic tubes subjected to reinforcement with flowable and bonding resins.

Objective: The goal was to evaluate the adhesive shear bond strength (SBS) of orthodontic tubes bonded to molar teeth and reinforced with Transbond XT (3M Science, St. Paul, MN, USA) and flowable resin.

Materials And Methods: In all, 120 molar teeth, previously extracted from patients with a mean age of 30 were included.

Influence of impacted canines on the stress distribution during dental trauma with and without a mouthguard.

Background/aim: Maxillary canines have a high incidence of impaction which may be associated with unexpected damage during maxillofacial trauma. The aim of this study was to evaluate how an impacted canine could influence the stress distribution in the dentoalveolar complex during a simulated impact before and after surgical removal plus the protective effect offered by a mouthguard.

Materials And Methods: Cross-sectional finite element models of the central incisor and support structures of a patient with an impacted canine in a transverse position were made using ImageJ and Marc/Mentat software.

Impact of oral condition on the quality of life of homeless people.

Objective: To describe the prevalence of oral health impact on quality of life and its association with the dental condition and sociodemographic factors of homeless people.

Methods: The sample was composed of 116 adults, temporarily attended by a public institution in the municipality of Goiânia, state of Goiás. Interviews were carried out including the Oral Impact on Daily Performance instrument and sociodemographic aspects.

Resin Cement: Correspondence with Try-In Paste and Influence on the Immediate Final Color of Veneers.

Purpose: To assess the correspondence of shades between try-in pastes and resin cements and their influence on the final color of veneers.

Materials And Methods: Bovine teeth (n = 140) were prepared and divided into 2 groups (a or b) according to ceramic veneer thickness (0.35 or 0.

Magneto-plasmonic Au-Coated Co nanoparticles synthesized via hot-injection method.

A synthetic procedure is described for the obtaining of superparamagnetic Co nanoparticles (NPs) via hot-injection method in the presence of sodium borohydride. The Co NPs obtained have an average diameter of 5.3 nm and saturation magnetization of 115 emu g.

Oxygen Saturation in the Dental Pulp of Maxillary Premolars in Different Age Groups - Part 1.

The aim of this study was to determine oxygen saturation levels in the dental pulp of maxillary premolars in different age groups. A total of 120 human maxillary premolars with normal dental pulps were selected covering the following age groups: 20-24, 25-29, 30-34, 35-39 and 40-44 years (n=24 each group). Oxygen saturation was assessed using pulse oximetry.

Screening the use of informed consent forms prior to procedures involving operative dentistry: ethical aspects.

The present study aimed to screen the knowledge and attitudes of dentists toward the use of informed consent forms prior to procedures involving operative dentistry. A research tool containing questions (questionnaire) regarding the use of informed consent forms was developed. The questionnaire consisted of seven questions structured to screen the current practice in operative dentistry towards the use of informed consent forms.

Ozone Gas Effect on Mineral Content of Dentin exposed to Streptococcus mutans Biofilm: An Energy-dispersive X-ray Evaluation.

Aim: This study aims to assess the effect of ozone gas on dentin exposed to Streptococcus mutans biofilm by evaluation of mineral content [log calcium-to-phosphorus (Ca/P)] using energy-dispersive X-ray (EDX) spectroscopy.

Materials And Methods: Five human third molars were sectioned into four slices of dentin and distributed in four groups: I - control (no treatment); II - ozone therapy; III - biofilm development; IV - ozone therapy followed by biofilm development. Mineral content (log Ca/P) was evaluated by EDX.

Inflammatory response of human dental pulp to at-home and in-office tooth bleaching.

Objective:: This study evaluated the inflammatory responses of human dental pulp after the use of two bleaching techniques.

Material And Methods:: Pulp samples were collected from human third molars extracted for orthodontic reasons and divided into three groups: control - no tooth bleaching (CG) (n=7); at-home bleaching with 15% carbamide peroxide (AH) (n = 10), and in-office bleaching with 38% hydrogen peroxide (IO) (n=12). Pulps were removed and stained with hematoxylin-eosin for microscopic analysis of inflammation intensity, collagen degradation, and pulp tissue organization.

Syndrome in question: Gorlin-Goltz syndrome.

The Nevoid Basal Cell Carcinoma Syndrome (NBCCS) is an uncommon disorder caused by a mutation in Patched, tumor suppressor gene. It is mainly characterized by numerous early onset basal cell carcinomas, odontogenic cysts of jaw and skeletal abnormalities. Due to the wide clinical spectrum, treatment and management of its modalities are not standardized and should be individualized and monitored by a multidisciplinary team.

Assessment of Anisotropic Semiconductor Nanorod and Nanoplatelet Heterostructures with Polarized Emission for Liquid Crystal Display Technology.

Semiconductor nanorods can emit linear-polarized light at efficiencies over 80%. Polarization of light in these systems, confirmed through single-rod spectroscopy, can be explained on the basis of the anisotropy of the transition dipole moment and dielectric confinement effects. Here we report emission polarization in macroscopic semiconductor-polymer composite films containing CdSe/CdS nanorods and colloidal CdSe nanoplatelets.

Frequency of Root Canal Isthmi in Human Permanent Teeth Determined by Cone-beam Computed Tomography.

Introduction: This study evaluated the frequency of root canal isthmi (RCIs) in human permanent teeth by using cone-beam computed tomography.

Methods: A sample of 1400 teeth of 618 patients (394 women; mean age, 43.4 years) was selected.

Radiographic evaluation of orthodontic treatment by means of four different cephalometric superimposition methods.

Introduction: Despite discussion on the merit of various cephalometric superimposition methods, there remains a need to assess which one can be used in daily practice with reasonably accuracy and less working time.

Objective: The aim of this study was to investigate four methods of cephalometric superimposition by means of assessing the longitudinal changes in craniofacial morphology caused by growth and response of adolescents with Class I malocclusion to orthodontic treatment involving first premolar extraction.

Methods: Pretreatment (T1) and post-treatment (T2) standardized lateral cephalometric radiographs of 31 adolescents (20 females and 11 males), with Angle Class I malocclusion and indication of premolar extraction, participated in this study.

Human identification through the analysis of smile photographs.

The comparison between antemortem and portmortem data comprehends the basis of the dental identification process. High-tech devices allow for optimal manipulation of postmortem data. However, in especial situations, the victims do not have records of dental treatments, making necessary the search for antemortem data from personal belongings.

Polycyclic aromatic hydrocarbon concentrations in gas and particle phases and source determination in atmospheric samples from a semiurban area of Dourados, Brazil.

A headspace solid-phase microextraction (HS-SPME) procedure that employs a PDMS/DVB fiber was developed for the analysis of gas-phase polycyclic aromatic hydrocarbons (PAHs) collected in polyurethane foam (PUF) by gas chromatography (GC) mass spectrometry. The method exhibited good linearity (R (2) > 0.99) and repeatability (4.