Abstract：
OBJECTIVES:The aim of this study was to investigate the mechanical properties of five types of fibre-reinforced composite (FRC) posts and compare them with traditional metal post. METHODS:Five FRC posts and a metallic post having different geometry and type of fibre (glass, carbon or quartz fibre) were loaded to failure in compression and bending. The transverse sections of FRC posts were observed using SEM to evaluate the fracture mode and the percentage of fibres (compared with burn-off test). Densities and voids content were also evaluated. RESULTS:Mechanical results were subjected to a one-way ANOVA and Tukey test (p<0.05). In compression, quartz fibre posts exhibited the greater maximum load and ultimate strength, carbon fibre posts showed a poor compressive behaviour. All posts had similar compressive moduli. Carbon posts showed the highest flexural properties (p<0.0001) while glass posts the greater maximum load. The fracture load values correlated to the diameters of posts showed a parabolic behaviour. The flexural strengths of all posts were four and seven times higher than dentine. The elastic moduli of almost all posts were similar to dentine. The compressive strengths were lower than flexural strengths. The fibre diameters ranged from 5.2 to 26 μm, the volume percentage of fibres was about 64%. The content of voids of some posts lower their mechanical behaviour. CONCLUSIONS:Compressive properties of FRC posts were lower than in bending. The flexural properties of FRC posts were higher than the metal post and similar to dentine. The mechanical behaviour is influenced by voids.
journal_name
J Dentjournal_title
Journal of dentistryauthors
Chieruzzi M,Pagano S,Pennacchi M,Lombardo G,D'Errico P,Kenny JMdoi
10.1016/j.jdent.2012.08.003subject
Has Abstractpub_date
2012-11-01 00:00:00pages
968-78issue
11eissn
0300-5712issn
1879-176Xpii
S0300-5712(12)00207-2journal_volume
40pub_type
杂志文章abstract：OBJECTIVE:To investigate the effects of Halloysite® aluminosilicate clay nanotubes (HNTs) addition on selected physical, mechanical, and biological properties of experimental adhesive resins. METHODS:Experimental dentin adhesive resins were prepared by mixing Bis-GMA, TEGDMA, HEMA (50/25/25wt.%), and photo-initiators....
journal_title：Journal of dentistry
pub_type： 杂志文章
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更新日期：2015-11-01 00:00:00
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journal_title：Journal of dentistry
pub_type： 杂志文章
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更新日期：2004-02-01 00:00:00
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pub_type： 杂志文章
doi：10.1016/j.jdent.2016.06.006
更新日期：2016-10-01 00:00:00
abstract：OBJECTIVE:To evaluate the effect of shading technique and thickness on the color stability and translucency of translucent zirconia after coffee thermocycling. METHODS:Specimens in different thicknesses (1; 1.5; 2 mm) (n = 4 for each thickness) were sectioned from translucent preshaded zirconia (Pre) and externally sh...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2018.03.011
更新日期：2018-06-01 00:00:00
abstract：OBJECTIVES:To determine the caries-removal effectiveness (CRE) and minimal-invasiveness potential (MIP) of contemporary caries-removal techniques. METHODS:Carious molars were scanned using micro-CT, after which dentine caries was removed by 9 contemporary caries-removal techniques. The micro-CT was repeated and CRE wa...
journal_title：Journal of dentistry
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.jdent.2010.11.006
更新日期：2011-02-01 00:00:00
abstract：:A 99.5 per cent pure aluminium step-wedge served as reference for evaluating the radiopacity of 55 anterior and posterior composites. The radiopacity of all materials evaluated was compared with the radiopacity of human enamel and human dentine of equivalent sample thickness. Seventeen composites exhibited a radiopaci...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/0300-5712(91)90056-5
更新日期：1991-12-01 00:00:00
abstract：OBJECTIVES:In vitro studies show that milk or milk components may have cariostatic properties. However, the results of epidemiological studies on the association between intake of dairy products and dental caries have been inconsistent. The purpose of this cross-sectional study was to examine the association between in...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2010.04.009
更新日期：2010-07-01 00:00:00
abstract：OBJECTIVES:Midterm-evaluation of a 5-year prospective clinical splitmouth-investigation on survival rate and long-term behavior of all-ceramic partial coverage restorations (PCRs) on molars. Pressed ceramic and CAD/CAM fabricated PCRs were compared. METHODS:80 vital molars of 25 patients were restored with all-ceramic...
journal_title：Journal of dentistry
pub_type： 临床试验,杂志文章
doi：10.1016/j.jdent.2009.04.006
更新日期：2009-08-01 00:00:00
abstract：OBJECTIVES:To examine the amount of heterogeneity in patients' preferences for dental care, what factors affect their preferences, and how much they would be willing to pay for improvement in specific dental care attributes. METHODS:A discrete choice experiment (DCE) was used to elicit patients' preferences. Three alt...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2017.12.005
更新日期：2018-02-01 00:00:00
abstract：OBJECTIVES:This study explored different pathways by which social position and social ties influence adult's oral health over a 13-year period. METHODS:A cohort investigation (Pro-Saúde Study) was conducted of non-faculty civil servants at a university in Rio de Janeiro, Brazil (N=1613). Baseline data collected in 199...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2015.12.004
更新日期：2016-01-01 00:00:00
abstract：UNLABELLED:Silver diammine fluoride (SDF) is used as an anticaries agent; however, its mode of action is uncertain, whether chemical, physical, mechanical or antibacterial. As a preliminary study, the effect of SDF on hydroxyapatite (HAp) and gelatin (as a chemically-representative protein) was examined. METHODS:2.5mg...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2011.06.008
更新日期：2011-09-01 00:00:00
abstract：OBJECTIVE:Erosive tooth wear (ETW) is an irreversible loss of dental hard tissue. This pilot study examined dentists' ability to diagnose and manage ETW relative to sound and caries-affected teeth. METHODS:Dentists recruited through the Indiana Dental Association (N = 36) participated in an internet-based survey, cont...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2020.103424
更新日期：2020-09-01 00:00:00
abstract：:OBJECTIVES.: To compare the safety and plaque removal efficacy of two oscillating/rotating/pulsating toothbrushes (Oral-B ProfessionalCaretrade mark 7000 [PC 7000] and Oral-B 3D Excel [3DE]) and a high-frequency toothbrush (Sonicare(R) Advance, Philips Oral Healthcare; SA) in a single-use, examiner-blind, three period...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：
更新日期：2005-06-01 00:00:00
abstract：OBJECTIVES:The objective of this study was to investigate the impact of moderate and severe hypodontia and amelogenesis imperfecta on the quality of life and self-esteem of affected adult patients. METHODS:Forty one adult patients (aged 18-45 years) with clinical and radiological diagnoses of moderate to severe hypodo...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2013.06.004
更新日期：2013-08-01 00:00:00
abstract：OBJECTIVE:To determine the influence of hard and soft splints with two thicknesses on the stress transmission to the tooth supporting the splint and the opposite tooth. METHODS:Continuous vertical forces up to 500N were applied to two opposite first molar phantom teeth using a universal loading machine. Deformation wa...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/s0300-5712(00)00026-9
更新日期：2000-09-01 00:00:00
abstract：OBJECTIVES:This study evaluated the effect of a chromium interlayer deposited by electroplating on the adhesion between titanium and porcelain by means of strain energy release rate (G-value (J/m(2)) or interfacial toughness). METHODS:Seventy rectangular specimens of commercially pure titanium (CP Ti) plates grade II ...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2010.05.003
更新日期：2010-08-01 00:00:00
abstract：:This paper addresses three main themes: (1) oral health and frailty; (2) interprofessional healthcare teams; and (3) dental professionals on healthcare teams. Oral diseases exacerbate frailty, are rampant in most long-term care (LTC) facilities, and typically are not managed effectively by the medical and nursing staf...
journal_title：Journal of dentistry
pub_type： 杂志文章,评审
doi：10.1016/j.jdent.2011.10.017
更新日期：2011-12-01 00:00:00
abstract：OBJECTIVES:In some studies gap formation has been evaluated in just one section of the restorative. This in vitro study aimed to design a quantitative three-dimensional method for evaluation of the contraction gap in restoratives. METHODS:Cervical cavities were prepared on buccal, palatal or lingual surfaces in human ...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2004.10.001
更新日期：2005-04-01 00:00:00
abstract：OBJECTIVES:Long-term survival of two highly viscous glass ionomer cements (Fuji IX GP Fast and Equia Fil) over a period of 6 years in vivo. METHODS:A total of 85 two- or three-surface class II restorations, comprising 43 Equia Fil / Equia Coat and 42 Fuji IX GP Fast / Fuji Coat LC, were placed in 34 patients. The rest...
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pub_type： 杂志文章,随机对照试验
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更新日期：2020-06-01 00:00:00
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journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2011.07.011
更新日期：2011-10-01 00:00:00
abstract：OBJECTIVES:This study concerned the temperature and linear dimensional change of heat-cured acrylic resin in the two-stage processing technique for complete dentures. METHODS:Thermocouples were incorporated in the acrylic resin for recording temperatures. Measurements between reference marks were made by a high-resolu...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/0300-5712(95)91190-x
更新日期：1995-08-01 00:00:00
abstract：OBJECTIVE:The aim of this article was to assess the clinical evidence for or against acupuncture and acupuncture-like therapies as treatments for temporomandibular joint disorder (TMD). DATA:This systematic review includes randomized clinical trials (RCTs) of acupuncture as a treatment for TMD compared to sham acupunc...
journal_title：Journal of dentistry
pub_type： 杂志文章,meta分析,评审
doi：10.1016/j.jdent.2011.02.006
更新日期：2011-05-01 00:00:00
abstract：OBJECTIVES:Systemic conditions may affect host susceptibility, disease progression and severity as well as treatment response. Previously, low oestrogen (E(2)) levels were associated with increased bone resorption, due to increased osteoclastogenesis and decreased osteoclast apoptosis. Osteoprotegerin (OPG) is an essen...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2012.01.013
更新日期：2012-05-01 00:00:00
abstract：OBJECTIVES:The objectives of this study were two-fold: (1) to determine (by surfometry) loss of deciduous and permanent enamel and dentine following 15days' exposure to a single low pH orange drink; and (2) to determine (by surfometry) loss of deciduous and permanent enamel and dentine following exposure to the product...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/s0300-5712(99)00074-3
更新日期：2000-05-01 00:00:00
abstract：OBJECTIVES:The purpose of the study was to evaluate the intra- and inter-examiner variability of a panel of examiners using a 'glance and grade' marking system when assessing Class II preparations. METHODS:The examination panel consisted of five university staff with varying clinical and teaching experience. The panel...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/s0300-5712(97)00033-x
更新日期：1998-11-01 00:00:00
abstract：OBJECTIVE:The main aim of this in vitro study was to evaluate the influence of Streptococcus mutans on the corrosion of titanium. METHODS:S. mutans biofilms were formed on commercially pure titanium (CP-Ti) square samples (10mm×10mm×1mm) using a culture medium enriched with sucrose. Open circuit potential (OCP) and el...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2013.03.008
更新日期：2013-06-01 00:00:00
abstract：OBJECTIVES:Sleep bruxism (SB), characterized by repetitive jaw-muscle activity during sleep, is often suggested as a cause of temporomandibular disorders (TMD), orofacial pain, and headache. This study aimed to challenge the relationship between jaw-muscle electromyographic (EMG) activity during sleep and jaw muscle sy...
journal_title：Journal of dentistry
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.jdent.2019.01.013
更新日期：2019-03-01 00:00:00
abstract：OBJECTIVES:Evaluate color and translucency of both non-colored and colored zirconia ceramics and compare them with corresponding properties of human dentine. METHODS:0.5mm thick samples of human (MSHD) and bovine (MSBD) dentine were obtained from 5 extracted human anterior maxillary teeth and 5 bovine incisors, respec...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2012.08.018
更新日期：2012-12-01 00:00:00
abstract：OBJECTIVE:The aim of this study was to compare the behavior of two new, low-shrinkage hybrid composites (Aelite LS and Inten-S) with a microfilled (Heliomolar) and a hybrid composite (Filtek Z250), in terms of polymerization contraction stress and microleakage. METHODS:Maximum contraction stress after 10 min was recor...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2004.01.014
更新日期：2004-07-01 00:00:00
abstract：:The purpose of this study was to compare the microleakage around direct composite inlays bonded with a dual cure luting composite into Class V type inlay cavities in extracted molar teeth. Bonding methods which included two cavity cleansing regimes and three bonding treatments were used. Either pumice and rinse or rin...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/0300-5712(91)90080-i
更新日期：1991-10-01 00:00:00
