Abstract:
:This study assessed the cross-sectional Knoop microhardness and flexural strength of root dentin exposed to different surface treatments with chemical agents after biomechanical preparation. Root canals from human canines were biomechanically treated and divided into eight groups (n=10) to receive one of the following dentin treatments: I. Deionized water (control); II. 5.25% Sodium hypochlorite (NaOCl); III. NaOCl + 10% Sodium ascorbate (SA); IV. SA; V. 2% Chlorhexidine gel (CHX); VI. 37% Phosphoric acid gel (PA) + CHX; VII. PA; and VIII. PA + NaOCl. The roots were sectioned to obtain specimens that were evaluated for cross-sectional Knoop microhardness and flexural strength using a three-point bending test. ANOVA and Tukey's test were performed. The microhardness in the control group was significantly higher (p < 0.05) than in the groups exposed to chemical agents, which in turn were statistically similar (p > 0.05) to each other. Regarding flexural strength, PA+NaOCl provided statistical higher values than PA+CHX and CHX. However, there was no significant difference between the control group and those groups subjected to surface treatment (p > 0.05). Dentin microhardness was reduced after exposure to NaOCl, CHX, PA, SA and their associations and the flexural strength of radicular dentin was not affected by the chemical agents.
journal_name
Braz Oral Resjournal_title
Brazilian oral researchauthors
Marcelino AP,Bruniera JF,Rached-Junior FA,Silva SR,Messias DCdoi
10.1590/1807-3107bor-2014.vol28.0052subject
Has Abstractpub_date
2014-01-01 00:00:00eissn
1806-8324issn
1807-3107pii
S1806-83242014000100260journal_volume
28pub_type
杂志文章abstract::The aim of the study was to test whether the filler composition of resin composites influences their flexural strength and modulus of elasticity. Flexural strength and modulus of elasticity were obtained through a three-point bending test. Twelve bar shaped specimens of 5 commercially available composites--Supreme (3M...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242007000100003
更新日期:2007-01-01 00:00:00
abstract::Evidence shows the polymicrobial etiology of endodontic infections, in which bacteria and their products are the main agents for the development, progression, and dissemination of apical periodontitis. Microbial factors in necrotic root canals (e.g., endotoxin) may spread into apical tissue, evoking and supporting a c...
journal_title:Brazilian oral research
pub_type: 杂志文章,评审
doi:10.1590/1807-3107bor-2018.vol32.0069
更新日期:2018-10-18 00:00:00
abstract::The aim of the present transversal study was to evaluate the clinical and biochemical salivary parameters of children with and without erosive tooth wear (ETW). The study population was children aged 4 to 9 years. A trained and calibrated examiner (kappa value for intraexaminer reliability = 0.89) classified the child...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2020.vol34.0115
更新日期:2020-09-04 00:00:00
abstract::The aim of this study was to detect possible differences in the EMG (electromyography) activity, chewing rate (CR), cycle duration (CD) and preferred chewing side (PCS) between children with and without unilateral posterior crossbite. Thirty-seven children aged from 7 to 10 years were selected from the clinic of the D...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242010000200013
更新日期:2010-04-01 00:00:00
abstract::Prosthetic eyes are artificial substitutes for the eyeball, made of heat-curing acrylic resin, serving to improve the esthetic appearance of the mutilated patient and his/her inclusion in society. The aim of this study was to assess the flexural strength of two heat-curing acrylic resins used for manufacturing prosthe...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242009000300007
更新日期:2009-07-01 00:00:00
abstract::The objective of this study was to describe the outcomes of an infant oral health programme 3 years after implementation, a programme focused on health education for parents and caries prevention methods for children in a baby clinic. A retrospective cohort study was carried out. The setting was the Infant Oral Health...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242004000100003
更新日期:2004-01-01 00:00:00
abstract::This paper addresses the construction of public oral health policies in Brazil by reviewing the available literature. It includes a discussion of the social responses given by the Brazilian State to oral health policies and the relationship of these responses with the ideological oral health movements that have develo...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242012000700014
更新日期:2012-01-01 00:00:00
abstract::Properly performed daily mechanical biofilm control is the most important prevention strategy for periodontal diseases. However, proper mechanical biofilm control is not performed effectively by the majority of the population, mainly due to lack of motivation and of manual dexterity. Local biofilm retention factors ma...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2014.vol28.0021
更新日期:2014-07-11 00:00:00
abstract::The aim of our study was to isolate populations of keratinocyte stem cells based on the expression of cell surface markers and to investigate whether the culture could affect their phenotype. keratinocytes from human oral mucosa were sorted based on the expression of the epithelial stem cell markers p75NTR and CD71. W...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2020.vol34.0033
更新日期:2020-04-06 00:00:00
abstract::The aim of this study is to evaluate the expression of cytokines in response to mineral trioxide aggregate (MTA) plus selenium in germ-free mice with experimental furcal perforation. The first left maxillary molar was opened, and the furcal area was perforated and treated with post-MTA-Se (experimental group). The sam...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2018.vol32.0103
更新日期:2018-10-11 00:00:00
abstract::This in vitro study evaluated both the antimicrobial activity and the root canal cleaning ability of plant extracts used in irrigation solutions. The antimicrobial activities of the aroeira-da-praia (Schinus terebintifolius Raddi) and the quixabeira (Syderoxylum obtusifolium Roem & Schult) hydroalcoholic extracts, of ...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242012000300006
更新日期:2012-05-01 00:00:00
abstract::Satisfaction with dental aesthetics is a subjective indicator used in epidemiological studies and is related to health behaviours. Little is known about the factors that influence this indicator, particularly among adolescents who live in a situation of social vulnerability. The aim of this study was to investigate th...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2019.vol33.0014
更新日期:2019-03-18 00:00:00
abstract::The aim of this study was to determine the number of FoxP3+ regulatory T (Treg) cells in the microenvironment of lower lip squamous cell carcinomas (LLSCCs) and to correlate the findings with clinicopathological parameters (tumor size/extent, regional lymph node metastasis, clinical stage, and histopathological grade ...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107BOR-2016.vol30.0130
更新日期:2016-12-22 00:00:00
abstract::This investigation aims to discuss the methodologies applied in clinical trials published about Carisolv, in order to assess the best scientific evidence concerning chemo-mechanical caries removal. Papers concerning the use of Carisolv were sought using a search strategy. The titles and abstracts of all the reports id...
journal_title:Brazilian oral research
pub_type: 杂志文章,评审
doi:10.1590/s1806-83242006000400015
更新日期:2006-10-01 00:00:00
abstract::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). The abutment was fixe...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2017.vol31.0096
更新日期:2017-12-07 00:00:00
abstract::The aim of the present study was to evaluate the prevalence and impact of malocclusion on oral health-related quality of life (OHRQoL) among schoolchildren aged 8 to 10 years and their parents in Diamantina, a town in the southeast of Brazil. A cross-sectional study was conducted with a sample of 390 randomly selected...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2018.vol32.0095
更新日期:2018-01-01 00:00:00
abstract::This epidemiologic survey aimed at assessing the prevalence of traumatic dental injuries in children seen at the Federal University of Rio de Janeiro, Brazil. The records of a total of 111 children (aged 0 to 6 years) seen from 2004 to 2006 in the dental trauma clinic were surveyed, comprising a total of 201 traumatiz...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242010000100015
更新日期:2010-01-01 00:00:00
abstract::This research evaluated the bone repair process in surgical defects created on the parietal bones of diabetic rabbits using the guided bone regeneration technique to observe the effects of alloxan in the induction of diabetes mellitus. Twenty-four adult rabbits were divided into three study groups: control (C), diabet...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242008000200015
更新日期:2008-04-01 00:00:00
abstract::Oral manifestations are common findings in human immunodeficiency virus (HIV) infected patients and frequently influence the overall health. Oral hairy leukoplakia (OHL) is strongly associated with HIV infection demonstrating its relationship with the individual's immune status and progression of immunosuppression. Th...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107BOR-2016.vol30.0118
更新日期:2016-11-28 00:00:00
abstract::This prospective observational study sought to investigate the incidence of intraoperative pain (IOP) among emergency endodontic patients and to construct an IOP prediction model that includes preoperative pain level (PPL). All patients who underwent emergency endodontic treatment at Gazi University, Ankara, Turkey, d...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2018.vol32.0038
更新日期:2018-08-06 00:00:00
abstract::The aim of this study was to evaluate surface free energy (SFE), surface roughness (SR) and surface hardness (SH) of two commercially available materials for fabricating dental implant abutments. In addition, the specimens were investigated by scanning electron microscopy (SEM) to determine the surface morphology. Twe...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242006000400005
更新日期:2006-10-01 00:00:00
abstract::The extent of separation between the maxillary and mandibular teeth in the fabrication of interocclusal splints designed to achieve efficiency and muscle relaxation is controversial and undefined in the literature. Based on this premise, the aim of this study was to evaluate the effect of interocclusal splint thicknes...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242011000600006
更新日期:2011-11-01 00:00:00
abstract::The aim of this study was to evaluate the influence of applying 2% chlorhexidine for 30 seconds after phosphoric acid conditioning of dentin on the immediate and long-term bond strengths in deciduous teeth. The occlusal enamel was removed from 40 human sound deciduous molars, which were exfoliated by natural means, an...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242011000500003
更新日期:2011-09-01 00:00:00
abstract::This study aimed to analyze the 100 most-cited papers in the field of oral medicine and pathology over time, identifying the areas of more intense research. Papers in journals of oral medicine and pathology were identified using the Web of Science database. The specified research period was between 1900 and 2019. Desc...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2021.vol35.0020
更新日期:2020-12-18 00:00:00
abstract::Alcohol consumption is a risk indicator for periodontal disease. The purpose of this study was to morphometrically evaluate the influence of alcohol consumption on alveolar bone level associated with ligature-induced periodontitis in rats. Thirty-six female rats (Wistar, 120 days-old) were randomly divided into three ...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242009000300017
更新日期:2009-07-01 00:00:00
abstract::This study aimed at investigating the effect of the partial erasing of DenOptix system storage phosphor plates on the image quality of digital radiographs. Standardized digital radiographs were acquired of a phantom mandible, using size 2 intraoral DenOptix storage phosphor plates (n = 10). Subsequently, the active ar...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242008000100014
更新日期:2008-01-01 00:00:00
abstract::The objective of this study was to evaluate children's respiratory patterns in the mixed dentition, by means of acoustic rhinometry, and its relation to the upper arch width development. Fifty patients were examined, 25 females and 25 males with mean age of eight years and seven months. All of them were submitted to a...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242009000400012
更新日期:2009-10-01 00:00:00
abstract::Oral mucositis is a painful condition that occurs in patients who have undergone haematopoietic stem-cell transplantation (HSCT) and has a huge impact on their quality of life. The objective of this study was to examine the extent to which interleukin-6 (IL-6) and tumour necrosis factor alpha (TNF-α) are associated wi...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107BOR-2018.vol32.0078
更新日期:2018-07-23 00:00:00
abstract::To assess the impact of oral conditions on the oral health-related quality of life (OHRQoL) of pediatric liver transplant candidates. This cross-sectional study included 60 children aged 13 to 48 months who were liver transplant candidates that attended the AC Camargo Cancer Center, São Paulo, Brazil. On the day of or...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2020.vol34.0100
更新日期:2020-01-01 00:00:00
abstract::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...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107BOR-2017.vol31.0078
更新日期:2017-09-28 00:00:00