Abstract：
OBJECTIVES:The purpose of this study was to evaluate the effects of a home bleaching gel containing 15% carbamide peroxide on the surface microhardness of four tooth-colored restorative materials in situ. METHODS:Four types of tooth-colored restorative materials, including a nanocomposite resin (Filtek Z350), a packable composite resin (Filtek P60), a polyacid-modified composite (Dyract AP), and a glass-ionomer cement (Ketac Molar Easymix), were used in this study. Each material was divided into two groups equally (n=18): bleaching group and control group. Thirty-six Chinese volunteers were recruited and stone casts were constructed for their upper jaws. Two of the four types of restorative materials were randomly selected and mounted on the first or second molar of the cast for each subject. With respect to each material selected, two specimens from each group were put at a random side. Then custom-fabricated trays containing specimens were fabricated. The participants wore the tray in the daytime, and applied the bleaching gel for the side containing specimens of bleaching group during the night. Surface microhardness measurements were obtained on the top surface of each sample on the different time periods. RESULTS:There was a statistically significant increase in the surface microhardness of Ketac Molar Easymix due to the exposure to 15% carbamide peroxide, while it produced a significant decrease for Dyract AP. Following immersing in saliva without bleaching agent, Ketac Molar Easymix showed a significant increase in surface microhardness. CONCLUSIONS:The effects of 15% carbamide peroxide on surface microhardness were material dependent. Immersing in saliva produced a surface hardening effect of glass-ionomer cement.
journal_name
J Dentjournal_title
Journal of dentistryauthors
Yu H,Li Q,Hussain M,Wang Ydoi
10.1016/j.jdent.2008.01.008subject
Has Abstractpub_date
2008-04-01 00:00:00pages
261-7issue
4eissn
0300-5712issn
1879-176Xpii
S0300-5712(08)00018-3journal_volume
36pub_type
杂志文章,随机对照试验abstract：OBJECTIVE:The purpose of this study was two-fold: (1) to monitor bacterial biofilm formation and bacteria-induced demineralization of dentine in situ by using electrochemical impedance spectrum (EIS); (2) to examine the relationship between EIS findings and changes in the chemical composition and ultrastructure of dent...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2009.09.013
更新日期：2010-02-01 00:00:00
abstract：OBJECTIVES:The aim of this study was to determine the effect on tooth colour (after 1 and 2 weeks use) of a self-applied tooth-whitening gel containing 6% hydrogen peroxide using a novel applicator, compared to a standard fluoride toothpaste. METHODS:A 2-week, examiner-blind, stratified, parallel design clinical trial...
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.2003.10.008
更新日期：2004-01-01 00:00:00
abstract：OBJECTIVES:Root canal treatment forms an essential part of general dental practice. Sodium hypochlorite (NaOCl) is the most commonly used irrigant in endodontics due to its ability to dissolve organic soft tissues in the root canal system and its action as a potent antimicrobial agent. Although NaOCl accidents created ...
journal_title：Journal of dentistry
pub_type： 杂志文章,评审
doi：10.1016/j.jdent.2013.08.012
更新日期：2013-11-01 00:00:00
abstract：:The purpose of this study was to evaluate the effect of a coaxial carbon dioxide/neodymium:yttrium aluminium garnet laser beam on enamel surface roughness and the dental pulps of mongrel dogs. In four dogs, four maxillary left posterior teeth were irradiated at 16 cm source-tooth distances. Two teeth were irradiated w...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/0300-5712(91)90095-g
更新日期：1991-04-01 00:00:00
abstract：OBJECTIVES:Full-ceramic systems can be produced by different techniques (layering, heatpressing, CAD/CAM) and have various compositions with different crystalline contents that may affect the optical properties of laminate restorations. METHODS:A total of 60 specimens were prepared from e.max Press, e.max CAD, Empress...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2012.11.013
更新日期：2013-08-01 00:00:00
abstract：:The effects of sample thickness on the in vitro bond strength of two light-activated glass polyalkenoate cements to dentine have been investigated. The buccal and/or lingual surfaces of non-carious human third molar teeth were used for bonding. The tensile bond strengths to dentine of samples of the cements of 0.5 mm,...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/0300-5712(94)90123-6
更新日期：1994-08-01 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:Test the ability of acidic fluoridated solutions to enhance fluoride (F) bound on bacteria (1) and the effect of dentifrice consistency on plaque fluid F uptake (2). METHODS:(1) Streptococcus mutans isolates were grown in BHI medium (37°C/18h). Bacteria were washed either with EDTA or CaCl2 both at 1mM to re...
journal_title：Journal of dentistry
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.jdent.2014.12.003
更新日期：2015-02-01 00:00:00
abstract：OBJECTIVES:Traditional mechanical methods of retaining restorative materials have been replaced to a large extent by tooth conserving adhesive restorative techniques. Because adhesives have been evolving so rapidly for the last few years, the timing is right for evaluating the clinical status of present day adhesives. ...
journal_title：Journal of dentistry
pub_type： 杂志文章,评审
doi：10.1016/s0300-5712(96)00070-x
更新日期：1998-01-01 00:00:00
abstract：OBJECTIVES:Probiotics might be beneficial to prevent or treat caries, gingivitis or periodontitis. We aimed to appraise trials assessing probiotics for managing caries and periodontal disease. DATA:We included randomized controlled trials comparing the efficacy of probiotics versus (placebo) control with regards to St...
journal_title：Journal of dentistry
pub_type： 杂志文章,meta分析,评审
doi：10.1016/j.jdent.2016.03.002
更新日期：2016-05-01 00:00:00
abstract：UNLABELLED:Three types of fiber-reinforced composite (FRC) molar crowns were tested on their fracture resistance and marginal adaptation under simulated oral stress conditions. Two glass fiber systems, one processed with a vacuum/pressure system, the other by manual fiber adaptation, and a polyethylene fiber system wer...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/s0300-5712(01)00007-0
更新日期：2001-03-01 00:00:00
abstract：PURPOSE:This study determined the shear bond strength of a nanohybrid composite resin to bleached enamel immediately or 15 days later using different adhesive systems and laser application. METHODS:One hundred and forty enamel specimens were prepared from human molar teeth and bleached either with 16% carbamide peroxi...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2009.03.012
更新日期：2009-07-01 00:00:00
abstract：OBJECTIVES:To evaluate the efficacy of different bleaching systems on artificially created stained-remineralized caries lesions; and to assess the susceptibility of the bleached lesions to further demineralization. METHODS:Human enamel specimens were sectioned, polished, demineralized, and randomly divided into six gr...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2018.12.008
更新日期：2019-02-01 00:00:00
abstract：OBJECTIVE:To evaluate the content of inorganic particles and the flexural strength of new condensable composites for posterior teeth in comparison to hybrid conventional composites. METHOD:The determination of the content of inorganic particles was performed by mass weighing of a polymerized composite before and after...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/s0300-5712(03)00049-6
更新日期：2003-07-01 00:00:00
abstract：OBJECTIVES:To investigate repairs of direct restorations by a group of Dutch general dental practitioners (GDPs) and its consequences on longevity of restorations. METHODS:Data set was based on dental records of patients attending 11 general dental practices (24 Dentists) in the Netherlands. Patients that received Cla...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2017.06.002
更新日期：2017-09-01 00:00:00
abstract：OBJECTIVE:This study aimed to assess the survival and success of glass fiber posts compared to cast metal posts in teeth without ferrule. MATERIAL AND METHODS:An equivalency, prospective, double-blind (patient and outcome evaluator) randomized controlled trial (RCT) with parallel groups was designed to compare the cli...
journal_title：Journal of dentistry
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.jdent.2020.103334
更新日期：2020-05-01 00:00:00
abstract：OBJECTIVES:To investigate the effect of impregnation of poly(ethyl methacrylate) and tetrahydro-furfuryl methacrylate (PEM/THFM) polymeric delivery system with chlorhexidine or fluconazole on its shear bond strength (SBS) and water sorption. METHODS:For SBS testing, 16 PEM/THFM discs impregnated with chlorhexidine (CH...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2012.04.027
更新日期：2012-08-01 00:00:00
abstract：OBJECTIVES:To investigate the influence of pre-heating of high-viscosity bulk-fill composite materials on their degree of conversion and shrinkage force formation. METHODS:Four bulk-fill composite materials (Tetric EvoCeram Bulk Fill-TECBF, x-tra fil-XF, QuixFil-QF, SonicFill-SF) and one conventional nano-hybrid resin...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2015.07.014
更新日期：2015-11-01 00:00:00
abstract：OBJECTIVES:The aim of this study was to evaluate the internal adaptation and marginal properties of ceramic laminate veneers fabricated using pressable and machinable CAD/CAM techniques. MATERIALS AND METHODS:40 ceramic laminate veneers were fabricated by either milling ceramic blocks using a CAD/CAM system (group 1 n...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2012.04.019
更新日期：2012-08-01 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：OBJECTIVES:Manufacturers are adding fluoride (F) to calcium-containing chewing gums to further promote enamel remineralization. The aim of this study was to assess the effect of a chewing gum containing phosphoryl oligosaccharides of calcium (POs-Ca) and fluoride on remineralization of enamel subsurface lesions, in a d...
journal_title：Journal of dentistry
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.jdent.2011.08.009
更新日期：2011-11-01 00:00:00
abstract：OBJECTIVES:The purpose of this study was to determine enamel and dentin bond durability after long-term water storage using self-etch adhesives. METHODS:Two single step self-etch adhesives (SU, Scotchbond Universal and GB, G-ӕnial Bond) and a two-step self-etch adhesive (OX, OptiBond XTR) were used. The shear bond str...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2015.10.018
更新日期：2015-12-01 00:00:00
abstract：OBJECTIVES:The aim of this research was to evaluate the effect of titanium tetrafluoride on dentine permeability in comparison with sodium fluoride and acidulated phosphate fluoride to determine their contribution to acid resistance of dentine. METHODS:Thirty-two dentine discs were prepared from extracted mandibular m...
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)00029-9
更新日期：1999-09-01 00:00:00
abstract：OBJECTIVES:Firstly, to evaluate the in vitro anti-erosion efficacy of a new mouthrinse formulation containing 450 ppm fluoride using profilometry and microindentation. Secondly, to compare fluoride uptake by erosive lesions from two mouthrinses containing different fluoride sources using dynamic secondary ion mass spec...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/S0300-5712(11)70004-5
更新日期：2010-11-01 00:00:00
abstract：OBJECTIVES:To assess the accuracy of a novel, non-invasive method for determining the axis of rotation of articulated dental study casts. METHOD:A 3D structured light scanner was constructed using a projector and two CMOS cameras. Dental stone casts were arbitrarily mounted on an average value articulator. With the te...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2013.11.019
更新日期：2014-02-01 00:00:00
abstract：INTRODUCTION:C. tropicalis and C. krusei have emerged as virulent species causing oral infections. Both have developed resistance to commonly prescribed azole antifungal agents. OBJECTIVE:The study aimed to determine the effect of mouth rinses containing chlorhexidine digluconate (CHX), cetylpyridinium chloride (CPC) ...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2012.04.003
更新日期：2012-07-01 00:00:00
abstract：OBJECTIVES:The purpose of this study was to evaluate the in vitro effectiveness of a new bioglass-containing and two commercial desensitising toothpastes on dentinal tubule occlusion after citric acid challenge or artificial saliva (AS) immersion. METHODS:One hundred dentin discs from human third molars were used. Spe...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2010.01.007
更新日期：2010-05-01 00:00:00
abstract：OBJECTIVE:The aim of this study was to characterize the surface of Y-TZP after abrasion with various airborne particles. METHODS:The Y-TZP blanks were cut into 44 discs and sintered according to the manufacturer's instructions. The specimens were treated as follows: (a) control specimens, (b) abraded with 50μm alumina...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2012.05.003
更新日期：2012-09-01 00:00:00
abstract：OBJECTIVE:To investigate the remineralisation of chitosan pre-treated enamel white spot lesions (WSLs) by bioglass in the presence of the pellicle layer. METHODS:50 artificial enamel white spot lesions were created by acidic gel. Two lesions were used to investigate the formation of the pellicle layer by treating with...
journal_title：Journal of dentistry
pub_type： 杂志文章
doi：10.1016/j.jdent.2018.02.004
更新日期：2018-05-01 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
