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/ESPE), a universal nanofilled composite; Esthet-X (Dentsply), Z-250 (3M/ESPE), Charisma (Heraeus Kulzer), universal hybrid composites; and Helio Fill (Vigodent), a microfine composite--were confectioned according to the ISO 4049/2000 specifications. The test was performed after a 7-days storage time using a universal test machine with a crosshead speed of 1 mm/min. The filler weight content was determined by the ashing technique. The data obtained on the mechanical properties were submitted to ANOVA and Tukey test (p < 0.05). Pearson's correlation test was used to determine the correlation between the filler content and the mechanical properties. A weak but significant correlation between the mechanical properties evaluated and the filler weight content was observed (p < 0.000). The microfine composite presented the lowest filler weight and the lowest mechanical properties. Statistically different flexural strength and modulus of elasticity results were observed among the universal hybrid composites. The nanofilled composite presented intermediary results. Within the limitations of this in vitro study, it could be concluded that the filler content significantly interfered in the flexural strength and modulus of elasticity of the composites tested.
journal_name
Braz Oral Resjournal_title
Brazilian oral researchauthors
Rodrigues Junior SA,Zanchi CH,Carvalho RV,Demarco FFdoi
10.1590/s1806-83242007000100003subject
Has Abstractpub_date
2007-01-01 00:00:00pages
16-21issue
1eissn
1806-8324issn
1807-3107pii
S1806-83242007000100003journal_volume
21pub_type
杂志文章abstract::Anti-dentin autoantibodies are associated with inflammatory root resorption in permanent teeth and are modulated by dental trauma and orthodontic force. However, it is not known whether deciduous tooth trauma can stimulate the development of a humoral immune response against dentin. The aim of this study was to evalua...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107BOR-2015.vol29.0102
更新日期:2015-01-01 00:00:00
abstract::The aim of this study was to investigate the effects of low-intensity pulsed ultrasound (LIPUS) on the osteogenic differentiation of dental follicle cells (DFCs) in vitro and on the regenerative effects of DFC-OsteoBoneTM complexes in vivo. DFCs were isolated and characterized. In the in vitro study, DFCs were culture...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2019.vol33.0045
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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
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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::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
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更新日期:2016-01-01 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
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abstract::The reduction in caries prevalence has not occurred uniformly for all dental surfaces. As the occlusal surfaces are still the most likely sites for the development of lesions, new methods of diagnosis are still being evaluated. This study compared a laser fluorescence (LF) system (DIAGNOdent) with the Ekstrands visual...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242005000400002
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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::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
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更新日期:2017-01-16 00:00:00
abstract::The purpose of this study was to determine the prevalence of odontogenic cysts and to identify their clinico-pathological features among patients by studying biopsy specimens obtained from the archives of the Department of Oral and Maxillofacial Pathology, College of Dental Sciences, Davangere, Karnataka, India, durin...
journal_title:Brazilian oral research
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abstract::Although malocclusions represent a serious public health issue, there is insufficient information about this problem in adolescents in Brazil, especially in poorer areas. The purpose of this cross-sectional study was to estimate the prevalence of facial alterations, dental malocclusions, and deleterious oral habits (D...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242012005000027
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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::Frequent use of Xylitol may decrease the S. mutans levels. However, very little is known about whether this effect on the levels of cariogenic bacteria is maintained after the interruption of short-term usage of xylitol. This study aimed at evaluating changes in mutans streptococci (MS) salivary levels after using a c...
journal_title:Brazilian oral research
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doi:10.1590/s1806-83242010000200003
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 assess the prevalence and the type of claim denials (administrative, clinical or both) made by a large dental insurance plan. This was a cross-sectional, observational study, which retrospectively collected data from the claims and denial reports of a dental insurance company. The sa...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107BOR-2015.vol29.0041
更新日期:2015-01-01 00:00:00
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...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107bor-2014.vol28.0052
更新日期:2014-01-01 00:00:00
abstract::Free gingival grafting, the most predictable technique to increase the keratinized gingiva, leaves an open wound on the palate and the resulting discomfort during the healing phase is a significant concern. This study was intended to evaluate the effect of topical erythropoietin on healing of the donor site. Twelve pa...
journal_title:Brazilian oral research
pub_type: 杂志文章,随机对照试验
doi:10.1590/1807-3107bor-2018.vol32.0055
更新日期:2018-06-11 00:00:00
abstract::The aim of this study was to verify the prevalence of signs and symptoms of temporomandibular disorders (TMD) in adolescents and its relationship to gender. The sample comprised 217 subjects, aged 12 to 18. The subjective symptoms and clinical signs of TMD were evaluated, using, respectively, a self-report questionnai...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242005000200004
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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::[This corrects the article doi: 10.1590/1807-3107BOR-2017.vol31.0105]. ...
journal_title:Brazilian oral research
pub_type: 杂志文章,已发布勘误
doi:10.1590/1807-3107BOR-2017.vol31.0105erratum
更新日期:2018-02-01 00:00:00
abstract::Osteoporosis, a disease characterized by progressive bone loss, has been the target of several studies in the past few years. It results in a much higher risk for fractures and might cause slower bone lesion healing. The aim of this work was to study the effects of Risedronate (allopathic medicine) and Calcarea phosph...
journal_title:Brazilian oral research
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doi:10.1590/s1806-83242006000300003
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abstract::In spite of decades of research on fluoride and the recognition of its role as the cornerstone of dental caries reduction in the last fifty years, questions still arise on its use at community, self-applied and professional application levels. Which method of fluoride delivery should be used? How and when should it be...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242010000500003
更新日期:2010-01-01 00:00:00
abstract::Tooth discoloration is commonly found in the dental clinic and tooth bleaching has been considered the preferred esthetic alternative, being more conservative, safe and with predictable results. Supervised home-use of 10% Carbamide Peroxide (CP) bleaching with custom-trays is the most common bleaching procedure dispen...
journal_title:Brazilian oral research
pub_type: 杂志文章,评审
doi:10.1590/s1806-83242009000500010
更新日期:2009-01-01 00:00:00
abstract::Sickle cell anemia (SCA) is the most prevalent genetic disease worldwide. Recurrent vaso-occlusive infarcts predispose SCA patients to infections, which are the primary causes of morbidly and mortality. This study aimed to evaluate the relationship between SCA and endodontic diseases. Personal information, medical dat...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107BOR-2016.vol30.0060
更新日期:2016-05-20 00:00:00
abstract::We analyzed the effect of the crosshead speed of an applied load on failure load and failure mode of restored human premolars. Fifty intact, noncarious human premolars were selected. Class II mesio-occlusodistal preparations were made with a water-cooled high-speed preparation machine, and the teeth were restored with...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/1807-3107BOR-2016.vol30.0003
更新日期:2016-01-01 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::Poor oral hygiene seems to be the norm in children and teenagers with Down Syndrome (DS). Advances in design and types of toothbrushes may improve biofilm control. This randomized, single-blind, crossover clinical trial evaluated the effectiveness of electric toothbrushes regarding mechanical control of biofilm in chi...
journal_title:Brazilian oral research
pub_type: 杂志文章,随机对照试验
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更新日期:2020-06-19 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::The aim of this study was to verify the prevalence of dental fluorosis in schoolchildren aged 6 to 15 and its possible association with the impacts on their daily activities. This study is observational, cross-sectional and analytical. A total of 513 schoolchildren from the city of Pinheiro Preto, SC, took part in thi...
journal_title:Brazilian oral research
pub_type: 杂志文章
doi:10.1590/s1806-83242005000200014
更新日期:2005-04-01 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