Abstract:
:This study evaluated the effects of 10% alphatocopherol on the fracture resistance of endodontically treated teeth subjected to tooth bleaching with hydrogen peroxide and immediately restored with composite resin. Fifty bovine incisors were selected, including 10 sound teeth that constituted the control group (G1 (C)). The remaining 40 teeth, which were endodontically treated, were divided into four groups (n = 10): G2 (CR), consisting of teeth immediately restored with composite resin; G3 (HP + CR), consisting of teeth subjected to tooth bleaching with 38% hydrogen peroxide and immediately restored with composite resin; G4 (HP + SA + CR), which received treatment similar to that used for G3, but with 10% sodium ascorbate gel applied after the bleaching protocol; and G5 (HP + AT + CR), which was similar to G4 but included 10% alphatocopherol gel as an antioxidant. After 24 h, composite restorations were performed, and teeth were subjected to a fracture resistance test at a speed of 0.5 mm/min in an electromechanical testing machine. The axial force was applied with an angle of incidence of 135° relative to the long axis of the root. Data were subjected to ANOVA and Tukey tests (p = 0.05). G1 exhibited the highest fracture resistance (p < 0.05). No significant differences among the other experimental groups were observed. The 10% sodium ascorbate and 10% alphatocopherol gels did not improve the fracture resistance of endodontically treated teeth subjected to bleaching with 38% hydrogen peroxide.
journal_name
Braz Oral Resjournal_title
Brazilian oral researchauthors
Jordão-Basso KC,Kuga MC,Dantas AA,Tonetto MR,Lima SN,Bandéca MCdoi
10.1590/1807-3107BOR-2016.vol30.0069subject
Has Abstractpub_date
2016-05-20 00:00:00issue
1eissn
1806-8324issn
1807-3107pii
S1806-83242016000100258journal_volume
30pub_type
杂志文章abstract::The bond strength of methacrylate (Z350, 3M ESPE) and silorane (P90, 3M ESPE) restorations, using different cavity filling techniques, was investigated. Cavities (6 × 3 × 3) in bovine teeth were filled using bulk, oblique, or horizontal increments. A push-out test was carried out after 24 h. Data were statistically an...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107BOR-2016.vol30.0044
更新日期:2016-01-01 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 preparation time and the amounts of apically extruded debris and irrigant using different nickel-titanium instrumentation systems. Forty-five extracted single-rooted mandibular premolar teeth were selected and divided into three groups. The root canals were instrumented accord...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2015.vol29.0002
更新日期:2015-01-01 00:00:00
abstract::The purpose of this double-blind, randomized, crossover in situ study is to compare remineralization of preformed enamel lesions by casein phosphopeptide-stabilized amorphous calcium phosphate (CPP-ACP) and fluoride dentifrice products. During each of four 10-day experimental legs, 10 participants wore intraoral remov...
journal_title:Brazilian oral research
pub_type: 杂志文章,随机对照试验
doi:10.1590/1807-3107bor-2020.vol34.0061
更新日期:2020-06-24 00:00:00
abstract::Gingival overgrowth (GO) is a frequent finding in patients treated with cyclosporine (CsA). This study investigated the prevalence and severity of GO in patients who received kidney transplant and CsA therapy, as well as associations with pharmacological and clinical factors. This cross-sectional study included 63 kid...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242011005000016
更新日期:2012-01-01 00:00:00
abstract::The aim of this study was to evaluate the influence of radiation therapy on root canal sealer push-out bond strength (BS) to dentin and the sealer/dentin interface after different final irrigation solutions (NaOCl, EDTA, and chitosan). Sixty-four maxillary canines were distributed into two groups (n=30): non-irradiate...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2018.vol32.0121
更新日期:2018-11-29 00:00:00
abstract::The aim of this study was to evaluate changes in the superficial dentin pattern of primary teeth after applying different phosphoric acid concentrations and conditioning times. Twenty-four dentin surfaces were divided in 4 groups with 10 teeth each: GI -no treatment; GII to GIV -phosphoric acid at 37%, 32%, and 10% re...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242010000300011
更新日期:2010-07-01 00:00:00
abstract::There are many limitations to image acquisition, using conventional radiography, of the temporomandibular joint (TMJ) region. The Computed Tomography (CT) scan is a better option, due to its higher accuracy, for purposes of diagnosis, surgical planning and treatment of bone injuries. The aim of the present study was t...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242010000400016
更新日期:2010-10-01 00:00:00
abstract::Human Papillomavirus (HPV) has considerable tropism for epithelial and mucosal tissues and can therefore be found in several anatomical sites, including the oral cavity. This study aimed to investigate the presence of HPV-DNA and the most frequent viral types in patients using full dentures, compare to patients not us...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2019.vol33.0091
更新日期:2019-11-25 00:00:00
abstract::The aims of this study were to identify (1) patient-related factors (sex, age, craniofacial pattern and smoking habit), (2) miniscrews implants (MSI)-related factors (length and diameter) and (3) location-related factors [bone (maxilla or mandible) and area (buccal, lingual and alveolar ridge)] that may be associated ...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107BOR-2016.vol30.0124
更新日期:2016-10-24 00:00:00
abstract::The identification of the skeletal maturation stage of the cervical vertebrae has proven an important reference for orthodontic diagnosis. The aim of the present study was to determine the association between the skeletal maturation stage of the cervical vertebrae and types of malocclusion according to the age and gen...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242012005000003
更新日期:2012-03-01 00:00:00
abstract::The aim of this study was to investigate the prevalence of oral and maxillofacial lesions among children from representative regions of Brazil. A retrospective descriptive study was conducted. Biopsy records comprising the period from 2000 to 2015 were obtained from the archives of three Brazilian oral pathology refer...
journal_title:Brazilian oral research
pub_type: 杂志文章,多中心研究
doi:10.1590/1807-3107bor-2018.vol32.0020
更新日期:2018-03-15 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::The aim of this study was to determine the cutting ability of chemical vapor deposition (CVD) diamond burs coupled to an ultrasonic dental unit handpiece for minimally invasive cavity preparation. One standard cavity was prepared on the mesial and distal surfaces of 40 extracted human third molars either with cylindri...
journal_title:Brazilian oral research
pub_type: 杂志文章,随机对照试验
doi:10.1590/s1806-83242006000200012
更新日期:2006-04-01 00:00:00
abstract::The aim of this study was to determine if multiple processing (heat-pressing) of a dental ceramic influences flexural strength, hardness, and microstructure. Ninety bar-shaped specimens (15 mm × 4 mm × 2 mm) of a pressed ceramic (Vita PM9) were fabricated and randomly divided into 6 groups (n = 15) according to the fa...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2018.vol32.0106
更新日期:2018-10-25 00:00:00
abstract::This pilot study aimed to evaluate the influence of smoking on clinical and microbiological parameters after nonsurgical periodontal therapy. Forty-eight subjects were grouped into smokers (SM, n = 24) and nonsmokers (NS, n = 24) and paired according to gender, age, ethnicity, and periodontal status. Both groups recei...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107BOR-2016.vol30.0092
更新日期:2016-08-22 00:00:00
abstract::To determine xerostomia-related frequency, factors, salivary flow rates and Oral Health-Related Quality of Life (OHRQoL) of patients attending the Universidad Andrés Bello Dental School Clinic, in the city of Viña del Mar, Chile. The study involved 566 patients assessed with xerostomia, based on a single standardized ...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107BOR-2017.vol31.0014
更新日期:2017-01-16 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 effects of ethanol alone on the oral mucosa are still poorly understood, especially because there are few non-smoking chronic consumers of alcoholic beverages. The aim of this study was to evaluate the frequency of micronucleus, abnormal nucleus/cytoplasm ratio, pyknosis, karyorrhexis and karyolysis in exfoliated ...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242006000200002
更新日期:2006-04-01 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::The aim of this study was to investigate the prevalence of orofacial clefts in live newborns from 1998 to 2002 in Brazilian state capitals and correlate their occurrence with a number of relevant socioeconomic factors collected in the 2000 census. Data was obtained from the Public Health Hospital Information System (S...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242009000100007
更新日期:2009-01-01 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::Recent studies investigating protease-activated receptor type 2 (PAR-2) suggest an association between the receptor and periodontal inflammation. It is known that gingipain, a bacterial protease secreted by the important periodontopathogen Porphyromonas gingivalis can activate PAR-2. Previous studies by our group foun...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107BOR-2017.vol31.0016
更新日期:2017-01-26 00:00:00
abstract::Candida infection is an important cause of morbidity and mortality in immunocompromised patients. The increase in its incidence has been associated with resistance to antimicrobial therapy and biofilm formation. The aim of this study was to evaluate the efficacy of tea tree oil (TTO) and its main component - terpinen-...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2020.vol34.0050
更新日期:2020-06-05 00:00:00
abstract::The purpose of this study was to evaluate the inflammatory and cure events of acid-based reactions using glass ionomer cement used for cementation of crowns, bridges, onlays and orthodontic bands implanted in subcutaneous tissue, at different time intervals. A total of 48 male Wistar rats were used, distributed into 4...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/S1806-83242014.50000003
更新日期:2014-01-01 00:00:00
abstract::The purpose of this study was to measure mass loss and surface roughness changes of different brands of flowable resin composites after a simulated toothbrushing test. The null hypotheses were that there would be no differences in mass loss and no significant changes in surface roughness after this test and that there...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242004000200012
更新日期:2004-04-01 00:00:00
abstract::The purpose of this study was to evaluate whether the use of desensitizing dentifrices used 15 days prior to and after in-office tooth bleaching could eliminate or reduce tooth sensitivity. After institutional review board approval and informed consent, 45 subjects were selected and divided into 3 groups according to ...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/S1806-83242013000600012
更新日期:2013-11-01 00:00:00
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::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::Halitosis or bad breath is an oral health condition characterized by unpleasant odors emanating consistently from the oral cavity. The origin of halitosis may be related both to systemic and oral conditions, but a large percentage of cases, about 85%, are generally related to an oral cause. Causes include certain food...
journal_title:Brazilian oral research
pub_type: 杂志文章,评审
doi:10.1590/s1806-83242008000500007
更新日期:2008-01-01 00:00:00