This study aimed to evaluate the level of knowledge, perception, and experience teledentistry amongst Brazilian dentists with ongoing COVID-19 pandemic.Between June July 2020, an online questionnaire was used collect information on demographic professional profiles their levels attitudes towards teledentistry. Descriptive statistics were reported as percentages, Chi-squared test compare responses general practitioners, specialists, those varying experience.This included 575 dentists,...

Abstract Aim To evaluate mineral trioxide aggregate ( MTA ), Biodentine and several formulations of calcium aluminate cements CAC b) in terms their ability to release ions (Ca 2+ ) form apatite‐like precipitates after short‐term immersion phosphate‐buffered saline PBS its influence on the bond strength root‐end cavity. Methodology Ten samples , Biodentine, b calcium‐enriched cement b+) were placed contact with or deionized water for 14 days. The surfaces analysed using SEM EDS ‐X FTIR ....

The aim of this study was to evaluate the antibacterial potential a calcium silicate-based sealer (Bio-C Sealer, Angelus) against common bacteria in primary and secondary endodontic infections. Enterococcus faecalis, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus Streptococcus mutans were exposed fresh Bio-C Sealer for 24 h by agar diffusion method (n=5). Additionally, activity investigated E. faecalis S. biofilms (48 old) grown discs with 4 mm diameter 2 height. (n=3) set...

Objective: The aim of this study was to evaluate in vitro the pulp thermal alterations during class V cavity preparations using Er:YAG laser and high-speed water flow. Materials Methods: Forty human teeth were selected prepared for thermocouple adaptation chamber. specimens assigned four groups: (1) 300 mJ/3 Hz, (2) mJ/4 (3) 9 mL/min flow, (4) 100 temperature measured before beginning at end preparation, as well procedures. groups analyzed by scanning electron microscopy. Result: Data...

The endodontic preparation of curved and narrow root canals is challenging, with a tendency for the prepared canal to deviate away from its natural axis. aim this study was evaluate, by cone-beam computed tomography, transportation centering ability mesiobuccal in maxillary molars after biomechanical different nickel-titanium (NiTi) rotary systems. Forty teeth angles curvature ranging 20° 40° radii between 5.0 mm 10.0 were selected assigned into four groups (n = 10), according preparative...

Abstract Aim To evaluate the effect of a calcium aluminate‐based cement ( CAC +) on development osteogenic phenotype in vitro . Methodology Rat calvaria‐derived cells were grown Thermanox ® coverslips for 24 h and then exposed to either samples (4‐h set) + or mineral trioxide aggregate MTA ) placed Transwell inserts periods up 14 days. Nonexposed cultures used as controls. The comparisons made using nonparametric Kruskal–Wallis test, followed by Student–Newman–Keuls post hoc test when...

ABSTRACT This study assessed the influence of different endodontic chemical substances on adhesion Epiphany SE/Resilon system (with and without resinous solvent) to radicular dentin walls, using push‐out test scanning electron microscopy (SEM). Forty‐eight root canals human canines were prepared biomechanically with ProTaper rotary files (crown‐down technique) was treated either 17% EDTA, 2% chlorhexidine gel (CHX) or 2.5% NaOCl (control). The filled Resilon cones SE sealer solvent. Six...

This study evaluated the effect of restorative protocol with sodium ascorbate on shear bond strength (SBS) a universal adhesive to intracoronal bleached dentin. One hundred-and-twenty bovine dentin fragments were randomly divided into 12 groups (n=10), according bleaching procedure (unbleached and bleached) (no treatment, 10% -10SA, 35% -35SA two-step etch-and-rinse -ER or one-step self-etch -SE Scotchbond approaches). Four whitening sessions performed using hydrogen peroxide. The samples...

The purposes of this study were to evaluate in vitro the influence different frequencies Er:YAG laser on human dentin caries removal capacity. Thirty fragments obtained from third molars randomly assigned into three groups (n = 10) according frequency used: 4, 6, and 10 Hz. lesion (±1 mm deep) was induced before irradiation by S.mutans cultures for 6 weeks. specimens all irradiated with 200 mJ energy noncontact focused mode under constant refrigeration (water flow: 2.5 mL/min). Quantitative...

Abstract This study reports the effects on micromorphology and temperature rise in human dentin using different frequencies of Er:YAG laser. Sixty fragments were randomly assigned into two groups ( n = 30): carious or sound dentin. Both divided three subgroups 10), according to laser frequency used: 4, 6, 10 Hz (energy: 200 mJ; irradiation distance: 12 mm; time: 20 s). A thermocouple adapted tooth fragment recorded initial value (°C); then, was measured after end (20 Morphological analysis...

Abstract This study evaluated the syringe/needle (SN), passive ultrasonic irrigation (PUI) and XP‐endo Finisher (XP) in removal of Ca(OH) 2 ‐based paste bond strength (BS) values an epoxy resin (AH Plus) silicate (MTA)‐based sealers to root dentin. Eighty lower premolars were assigned: control group (CT), SN, PUI XP, subdivided according sealer ( n = 10) for BS. SN has lowest followed by XP. AH Plus had higher BS CT compared with all thirds. XP presented similar apical middle thirds than...

To evaluate the effects of AH Plus (Dentsply), Sealer 26 and BC (Produtos Médicos e Odontológicos) on cytotoxicity inflammation in macrophage cultures exposed to bacterial lipopolysaccharide (LPS).After initial setting, sealers were conditioned with serum-free culture medium for 24 h (1 ml/cm2 ). Macrophages from RAW 264.7 strain sealer extracts a 1:16 ratio or without LPS. Cell morphology, viability, mitochondrial activity, oxidative stress gene expression interleukin 1β (IL-1β) tumour...

Objective: In this study we evaluated the ablation rate of superficial and deep dentin irradiated with different Er:YAG laser energy levels, observed micromorphological aspects lased substrates a scanning electron microscope (SEM). Background Data: Little is known about effect irradiation on depths. Materials Methods: Sixty molar crowns were bisected, providing 120 specimens, which randomly assigned into two groups (superficial or dentin), later five subgroups (160, 200, 260, 300, 360 mJ)....

Objective: The purpose of this study was to analyze the effects agitation 17% ethylenediaminetetraacetic acid (EDTA) with 1064 nm Nd:YAG and 980 diode laser on root dentin microhardness superficial roughness (with confocal scanning microscopy [CLSM]). Background data: Root canal irrigants are used in an attempt minimize negative smear layer. Materials methods: Twenty-five bovine roots were sectioned longitudinally divided into five groups (n=10 each): (1) deionized water, (2) EDTA, (3) EDTA...

The aim of this study was to evaluate the effects proanthocyanidin (PA) and chlorhexidine (CHX) on bond strength (BS), failure pattern, resin-dentin interface morphology endodontic sealers EndoREZ AH Plus after 24 h 6 months water storage. A total 120 prepared bovine roots were divided into six groups: Plus, CHX+AH PA+AH EndoREZ, CHX+EndoREZ, PA+EndoREZ. Dentin treated for 1 or 5 min with 2% CHX 15% PA, respectively. Roots filled stored in (n = 10). Root slices subjected push-out test...

Abstract Aim To evaluate the effects of 2.8% or 10% calcium chloride (CaCl 2 ) in aluminate cement (CAC) with either bismuth oxide (Bi O 3 zinc (ZnO) as radiopacifiers on progression osteogenic cell cultures. Methodology Rat calvaria‐derived cells were grown Thermanox ® coverslips for 24 h and exposed to samples (i) CAC b: CaCl 25% Bi ; (ii) b+: (iii) z: ZnO; (iv) z+: ZnO, placed inserts. Nonexposed cultures served control. Calcium phosphorus contents culture media quantified. The cements...

Objective: The aim of this study was to assess any long-term chemical and morphological Nd:YAG laser modifications on irradiated primary enamel. Background data: Previous studies human enamel employed methodologies that evaluated the short-term effects only. Methods: One hundred eighty-six (with and/or without fluoride) teeth from high-caries-risk children, which were exfoliated over a 1-year period, collected, sample surface area submitted for scanning electron microscopy (SEM), Fourier...

Root canal irrigants are used to minimize the negative effects of smear layer on endodontic sealer retention. The aim this study was evaluate efficacy agitation 17% ethylenediaminetetraacetic acid (EDTA) with ultrasonic, 1064-nm Nd:YAG and 980-nm diode laser retention an epoxy-based root walls. Forty single-rooted bovine teeth were instrumented ProTaper rotary system divided into four groups according final irrigation protocol (n = 10): (1) EDTA (control); (2) 50-s ultrasonic agitation; (3)...

The aim of this study was to evaluate the effect 24% ethylenediaminetetraacetic acid (EDTA) gel and 2% chlorhexidine (CHX) in dentin permeability smear layer removal from root canals instrumented with NiTi rotary system using histochemical staining scanning electron microscopy (SEM) analysis. Overall, 43 premolars were classified into two experimental groups, EDTA (n = 20) CHX 20), a negative control (NC) 3). All specimens irrigant solutions used after each file change. group received final...

Chemical solutions play important roles in endodontic treatment and promote ultrastructural changes dentin surface. The aim of this study was to quantify root canal roughness at different concentrations calcium hypochlorite (Ca(OCl)2) sodium (NaOCl) by confocal laser scanning microscopy (CLSM). Fifty-two human mandibular premolars were sectioned randomly organized into thirteen groups (n=8): saline (control); 1%, 2.5% 5% NaOCl; Ca(OCl)2; the further divided with or without EDTA. chlorine...