Abstract:
OBJECTIVES:The purpose of the study was to evaluate gloss and color changes of resin composites after exposure to different bleaching agents. METHODS:Products used, were: Nite White ACP (10% carbamide peroxide gel), Crest Classic and Supreme Whitestrip (6.5% and 14% hydrogen peroxide strips, accordingly). A hybrid (Herculite XRV) and a nanohybrid (Premise) resin composite were exposed to the bleaching agents. Twenty-four disk-shaped specimens per composite were subjected to bleaching by each of the agents (n=8) for up to 2 weeks. Color changes using CIE-L*a*b* system (50:50% acceptability threshold: ΔE*=3.3) were recorded after 1 and 2 weeks bleaching cycles relative to baseline measurements. In addition, gloss measurements (in gloss units) were performed at the same bleaching intervals and gloss changes were calculated. RESULTS:All bleaching agents tested provided decrease in gloss of both composites after 2-week bleaching (p<0.05). No differences were detected among the three bleaching regimens, for up to 2-week application, in terms of color and gloss changes on both composites. After the 2-week bleaching period, hybrid composite presented higher gloss reduction (%) than nanohybrid regardless of the bleaching agent (p<0.05). Color change (ΔE*) was lower than 3.3 for all composite-bleaching agent combinations. After 1- and 2-week bleaching time, the nanohybrid composite provided higher color change than the hybrid under all bleaching procedures (p<0.05). No strong correlation was proved between color (ΔE*) and gloss changes caused by bleaching treatments. CONCLUSIONS:After 2-week bleaching cycles, composites showed significant gloss reduction (p<0.05). Color alteration was below the 50:50% acceptability threshold (ΔE*<3.3) and it was product-depended. There was no significant difference in color and gloss changes between the evaluated bleaching strips and 10% carbamide peroxide gel.
journal_name
J Dentjournal_title
Journal of dentistryauthors
Anagnostou M,Chelioti G,Chioti S,Kakaboura Adoi
10.1016/j.jdent.2010.06.006subject
Has Abstractpub_date
2010-01-01 00:00:00pages
e129-36eissn
0300-5712issn
1879-176Xpii
S0300-5712(10)00154-5journal_volume
38 Suppl 2pub_type
杂志文章abstract:OBJECTIVES:To assess sustainability of shortened dental arches (SDA) by determining time to 'first restorative intervention' of teeth and time to 'tooth loss' and comparing these outcomes with complete dental arches (CDA) and SDA plus removable dental prostheses (RDP). METHODS:Data (follow-up time ranged from 27.4 (SD...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2013.05.013
更新日期:2013-08-01 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:AIM:The aim of this study is to report the subsequent treatment provided, over the 11 years' data available, when a re-intervention was considered clinically necessary on a glass ionomer (GI) restoration. METHODS:A detailed sample of treatment records of patients has been established at the Dental Practice Division of...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2008.07.008
更新日期:2009-01-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to compare microleakage of glass ionomer materials (GIC) using two different modes of cavity preparation: a high-speed hand piece and an erbium/yttrium-aluminum-garnet (Er/YAG) laser. METHODS:Eighty caries free permanent molar teeth had class V preparations cut on both the bucca...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/s0300-5712(02)00011-8
更新日期:2002-05-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to evaluate the risk factors associated with noncarious cervical lesions (NCCLs), cervical dentin hypersensitivity (CDH), and gingival recession (GR), besides the relationship among these conditions in a specific Brazilian sample population. METHODS:185 patients who attended the "A...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2018.06.017
更新日期:2018-09-01 00:00:00
abstract:BACKGROUND:There is no consensus on whether incisal coverage is a risk or a protective factor in preparations for ceramic veneers. OBJECTIVE:The aim of this systematic review and meta-analysis was to evaluate the survival rates of preparation designs for ceramic veneers with and without incisal coverage. METHODS:Prim...
journal_title:Journal of dentistry
pub_type: 杂志文章,meta分析,评审
doi:10.1016/j.jdent.2016.06.004
更新日期:2016-09-01 00:00:00
abstract:OBJECTIVES:Three luting cements based on zinc oxide phosphate, glass ionomer or composite resin were compared with respect to their influence on the anaerobic fermentation of sucrose by human oral bacteria. METHODS:Fifteen standardized samples of each of the three luting cements were prepared according to the manufact...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/s0300-5712(98)00027-x
更新日期:1999-01-01 00:00:00
abstract:OBJECTIVES:To investigate, in a sample of probable sleep bruxers with and without temporomandibular disorder (TMD) pain, the presence and relationships between clinical jaw-muscle symptoms, and test their associations with jaw-muscle electromyographic (EMG) activity during sleep. METHODS:Pain, unpleasantness, tirednes...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2019.05.016
更新日期:2019-06-01 00:00:00
abstract:OBJECTIVE:The study evaluated the clinical performance and marginal adaptation of direct and semi-direct class II composite restorations in a split-mouth design over 3.5 years. DESIGN:44 upper posterior teeth in 11 adults with primary carious lesions were treated with 22 direct and 22 semi-direct restorations. Convent...
journal_title:Journal of dentistry
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/j.jdent.2004.11.009
更新日期:2005-07-01 00:00:00
abstract:OBJECTIVES:The purpose of this study was to determine the longevity and quality of Class I and Class II resin composite (Herculite XR) restorations placed in private practice. METHODS:One thousand two hundred and nine Class I and Class II composite restorations with margins in enamel were evaluated clinically after pe...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/s0300-5712(96)00027-9
更新日期:1997-05-01 00:00:00
abstract:OBJECTIVES:The goal of this study was to evaluate influence of different shade guides and respective shade matching methods on shade matching results and to analyze user satisfaction with these products and methods. METHODS:Eighty-eight pre-doctoral dental students completed the study. The color of four target shade t...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2009.02.005
更新日期:2009-01-01 00:00:00
abstract:BACKGROUND:Untreated dental caries in children remains a public health challenge in poor communities. OBJECTIVES:This prospective controlled clinical trial investigated the effectiveness of a new anti-caries agent, Nano Silver Fluoride (NSF), applied once a year to arrest caries in children. METHODS:One hundred thirt...
journal_title:Journal of dentistry
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.jdent.2014.05.017
更新日期:2014-08-01 00:00:00
abstract:OBJECTIVE:To investigate the flexural strength and fluoride release of four conventional glass-ionomer cements: Ketac-Molar (KM), HiFi (HF), Vivaglass Fil (VF), Ketac-Fil (KF) and a newly developed glass polyphosphonate cement, Diamond Carve (DC). METHOD:Disc specimens (10 mm diameter, 1 mm thick) were prepared and mo...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/s0300-5712(98)00061-x
更新日期:1999-07-01 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: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:This study aimed to analyse if children with untreated or treated caries (restorations/missing teeth) are perceived differently compared to children with healthy teeth and to explore possible differences in the perception by laypersons and dental experts. METHODS:Eye movements of female experts (n = 20) and...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2018.05.006
更新日期:2018-07-01 00:00:00
abstract:OBJECTIVES:To detect any differences in the propensity of unstimulated and stimulated, individual whole saliva to cause in vitro staining by chlorhexidine and tea. METHODS:Unstimulated and stimulated human saliva was collected on a daily basis and used to coat optically clear acrylic specimens. Specimens were subjecte...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/s0300-5712(02)00053-2
更新日期:2002-09-01 00:00:00
abstract:OBJECTIVES:To measure the shear bond strengths of various luting cements to a sandblasted zirconia ceramic and to determine the surface energy parameters of the luting cements. METHODS:Two conventional glass ionomer cements, two resin-modified glass ionomer cements, two compomer cements, and two adhesive resin cements...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2011.08.012
更新日期:2011-11-01 00:00:00
abstract:OBJECTIVES:To investigate the prevalence of Combination Syndrome, and to investigate if provision of a mandibular removable partial denture has any influence on the prevalence of Combination Syndrome. METHOD:Patients attending Kings College London Dental Institute, Guys Hospital who wore maxillary conventional complet...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2019.01.016
更新日期:2019-03-01 00:00:00
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
doi:10.1016/j.jdent.2015.08.014
更新日期:2015-11-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to evaluate restorations, previously placed in clinical trials, for the rate of wear of the proximal surfaces, by tooth position. MATERIALS AND METHODS:Seventy resin composite restorations were evaluated in bicuspids and molars. Fifty restorations were direct placement restorati...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/0300-5712(95)00040-2
更新日期:1996-01-01 00:00:00
abstract::In a previous study concerning oral function with shortened dental arches, it was found that approximately 10 per cent of the patients investigated complained of impaired masticatory ability despite a substantial reduction in arch length and, as a consequence, food platform area. This finding differs from those of stu...
journal_title:Journal of dentistry
pub_type: 杂志文章,评审
doi:10.1016/0300-5712(90)90107-p
更新日期:1990-08-01 00:00:00
abstract:OBJECTIVES:The objective of this study was to assess the clinical performance of a direct placement gallium alloy sealed with an established dentine adhesive system. In addition, microanalysis of a few gallium restorations that failed in clinical service was performed. Clinical factors such as pulpal sensitivity, fract...
journal_title:Journal of dentistry
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/s0300-5712(99)00051-2
更新日期:2000-02-01 00:00:00
abstract::The bacteriological contamination of pumice slurry in polishing units in a dental clinical area (high risk), a production laboratory (medium risk), and a non-clinical teaching laboratory (low risk), was investigated. Slurry samples taken from all three areas were found to be heavily contaminated with pathogenic organi...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/0300-5712(90)90030-i
更新日期:1990-10-01 00:00:00
abstract:OBJECTIVES:Secondary caries at the tooth-restoration margins is a primary reason for restoration failure. Cracks at the margins lead to leakage which can trap bacteria, producing acids to cause caries. To date, there has been no report on developing an adhesive resin that has self-healing, antibacterial and remineraliz...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2018.05.009
更新日期:2018-08-01 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
abstract:OBJECTIVES:Verify the influence of curing methods on contraction stress, stress rate, and degree of conversion (DC) of a restorative composite and on bond strength of composite restoratives. METHODS:For the stress test, composite (0.84 mm thick) was applied between two 5-mm diameter glass rods, mounted in a servohydra...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2006.10.003
更新日期:2007-04-01 00:00:00
abstract::The purpose was to present a descriptive report of the clinical performance of adhesive bridges fitted in a university department of restorative dentistry. The case records of 400 consecutive adhesive bridges fitted between November 1984 and June 1989 in the School of Clinical Dentistry, Queen's University, Belfast we...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/0300-5712(91)90122-f
更新日期:1991-08-01 00:00:00
abstract:OBJECTIVE:Silver compounds have been used for their medical properties for centuries and in dentistry for more than a century. The aim of this review is to examine the evidence supporting the therapeutic use of silver in dentistry and the outcomes from the clinical trials, as well as mode of action and biocompatibility...
journal_title:Journal of dentistry
pub_type: 杂志文章,评审
doi:10.1016/j.jdent.2012.03.009
更新日期:2012-07-01 00:00:00
abstract:OBJECTIVES:To compare the lifetime of Y-TZP/porcelain crowns under three different load conditions using step-stress accelerated lifetime testing. METHODS:The Y-TZP frameworks were milled using CAD/CAM, veneered with a porcelain and cemented onto dentine analogue dies. Specimens were divided according to the occlusal ...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2015.01.012
更新日期:2015-04-01 00:00:00