Abstract:
OBJECTIVES:This study aimed to assess the effect of curing conditions--exposure time, mode, energy density, and exposure distance--on the mechanical properties of high-viscosity bulk-fill resin-based composites (RBCs) measured at simulated clinical relevant filling depths. METHODS:Three high-viscosity bulk-fill RBCs were investigated by assessing the variation in micromechanical properties in 200μm steps (Vickers hardness [HV] and indentation modulus [E]) within simulated 6-mm deep fillings (n=5) polymerized under 16 different curing conditions. The exposure duration was 5, 20, and 40s in the standard power mode; 3, 4, and 8s in the high power mode; and 3 and 6s in the plasma mode; the exposure distance was 0 and 7mm. Energy density ranged from 2.63 to 47.03J/cm(2). Measurements were performed after 24h of storage in distilled water at 37°C. The depth of cure (DOC) was calculated as the 80% hardness drop-off. RESULTS:The results were compared using one- and multiple-way ANOVAs and Tukey's HSD post hoc test (α=0.05). The effect of the parameter material was significant and strong on all measured properties (p<0.05, partial eta-squared ηP(2)=0.492 for E, 0.562 for HV, and 0.087 for DOC). Energy density exerted the strongest influence on the measured properties in all materials, whereas the influence of the exposure distance was strong on DOC, low on E and not significant on HV. The high-viscosity bulk-fill RBCs respond heterogeneously to variations in curing conditions. CONCLUSIONS:A lower energy density limit was identified, allowing for a 4mm material bulk placement (5.88J/cm(2) for EvoCeram Bulk Fill, 7.0J/cm(2) for x-tra fil, and 23.51J/cm(2) for SonicFill). This limit increased to 47.03J/cm(2) for a 5mm bulk placement, as claimed for SonicFill. To maintain mechanical properties in depth, however, an energy density of at least 23.51J/cm(2) is recommended for EvoCeram Bulk Fill and x-tra fil and 47.03J/cm(2) for SonicFill, respectively. This energy density should be achieved at moderate irradiance and increased curing time. CLINICAL SIGNIFICANCE:An exposure time of 20s at moderate irradiance is recommended for all materials for a 4 mm bulk placement.
journal_name
J Dentjournal_title
Journal of dentistryauthors
Ilie N,Stark Kdoi
10.1016/j.jdent.2014.05.012subject
Has Abstractpub_date
2014-08-01 00:00:00pages
977-85issue
8eissn
0300-5712issn
1879-176Xpii
S0300-5712(14)00156-0journal_volume
42pub_type
杂志文章abstract:OBJECTIVE:To evaluate the efficacy of EDDY, a new sonic-powered irrigation system, in reducing intracanal bacteria load. METHODS:Thirty-eight instrumented, autoclaved single-rooted human premolars were inoculated with Enterococcus faecalis (ATCC-29212) for 21 days. Two teeth were used as negative control without bacte...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2018.06.003
更新日期:2018-08-01 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:The concept of Cervical Margin Relocation (CMR) consists on placing a base layer of direct resin composite to elevate supra-gingivally the proximal indirect bonded restorations. The aims of this clinical study were to evaluate 1. Bleeding on Probing (BoP) on posterior indirect restorations with one interprox...
journal_title:Journal of dentistry
pub_type: 临床试验,杂志文章
doi:10.1016/j.jdent.2017.10.008
更新日期:2018-02-01 00:00:00
abstract:OBJECTIVE:The present study tested the central hypothesis that selective demineralisation of dentine extrafibrillar minerals by lowering the phosphoric acid concentration improves the quality of the resin-dentine interface. METHODS:Dentine surfaces were etched with different concentrations of phosphoric acid (1, 5, 10...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2016.07.008
更新日期:2016-09-01 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:Three activated organofunctional silane coupling agents alone and blended with a non-functional cross-linker silane were evaluated as adhesion promoters in an experiment where a bis-GMA (bis-phenol-A-diglycidyldimethacrylate) resin was bonded to silicatized titanium. The adhesive performances of the silanes ...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2006.01.008
更新日期:2006-11-01 00:00:00
abstract:OBJECTIVES:Despite increasing evidence supporting selective caries tissue removal, the technique is not adopted by most dentists, one possible reason being that patients might reject it. We aimed to assess patients' preferences for selective versus complete excavation, and to identify predictors of this preference. ME...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2016.01.006
更新日期:2016-03-01 00:00:00
abstract:OBJECTIVES:This prospective clinical study compared the performance of implant-retained (study group) and tooth-retained (control) zirconia based fixed dental prostheses (FDPs) with at least 4 units. The null-hypothesis stated that complication rates in both groups are equally distributed. METHODS:The study included p...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2014.10.011
更新日期:2015-01-01 00:00:00
abstract:OBJECTIVE:To compare the permeability of the occlusal and the cervical dentinal regions within the same tooth, which represent the bottom of Class I and V cavities, respectively, with two different compositions of perfusion fluid, in vitro. METHODS:An occlusal and a buccal disc were cut from each extracted third molar...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/s0300-5712(02)00005-2
更新日期:2002-02-01 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:OBJECTIVES:The aim of this study was to assess the prevalence of direct restorations in posterior teeth in children aged 12, from a birth cohort, and to test the association between the quality of the restorations and individual variables experienced in the life cycle. METHODS:All live-born children in Pelotas, in 200...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2019.103183
更新日期:2019-10-01 00:00:00
abstract:OBJECTIVES:To integrate items from two widely used oral health-related quality of life (OHRQoL) questionnaires, the General Oral Health Assessment Index (GOHAI) and the Oral Impacts on Daily Performances (OIDP), as well as culturally-specific items of the Oral Health Impact Profile (OHIP) into a four-dimensional OHRQoL...
journal_title:Journal of dentistry
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: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:The objectives of this study were to investigate: (1) the antibacterial activity of two antibacterial monomers, dimethylaminododecyl methacrylate (DMADDM) and dimethylammoniumethyl dimethacrylate (DMAEDM), against eight different species of oral pathogens for the first time; (2) the cytotoxicity of DMAEDM an...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2013.07.006
更新日期:2013-10-01 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: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: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:OBJECTIVE:This study aimed to evaluate the addition of copper nanoparticles (CuNp) on the clinical performance of a universal adhesive system used as etch-and-rinse (ER) and self-etch (SE). METHODS:216 restorations were randomly placed in 36 subjects according to the following groups: ERcu = etch-and-rinse with 0.1% C...
journal_title:Journal of dentistry
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.jdent.2019.103219
更新日期:2019-11-01 00:00:00
abstract:OBJECTIVES:To determine the visual 50:50% acceptability thresholds for lightness, chroma and hue for dental ceramics using CIEDE2000(K(L):K(C):K(H)) formula, and to evaluate the formula performance using different parametric factors. METHODS:A 30-observer panel evaluated three subsets of ceramic samples: lightness sub...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2011.09.007
更新日期:2011-12-01 00:00:00
abstract:OBJECTIVES:This study evaluated the quality and the remodeling of bone around commercially pure titanium implants after 3, 6, 12 and 18 month implantation periods in the sheep. METHODS:Twelve animals were implanted in the cortico-trabecular areas of both femurs. Each femur received four implants with a rough surface (...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/s0300-5712(02)00018-0
更新日期:2002-07-01 00:00:00
abstract:INTRODUCTION:We assessed time trends in root caries experience, i.e. the sum of filled and carious root surfaces (FRS, CRS), and evaluated risk indicators of FRS/CRS in Germany. METHODS:FRS and CRS from repeated waves (1997, 2005, 2014) of the nationally-representative German Oral Health Studies were analyzed in 35-44...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2018.08.013
更新日期:2018-11-01 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:Tooth shade is crucial to patient satisfaction in aesthetic dentistry. Two-dimensional (2D) clinical photographs have been widely used to record patients' tooth shade for creation of beautiful smile. However, in the digital workflow, 3D virtual teeth models in open file format contain only mesh information w...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2018.09.009
更新日期:2018-12-01 00:00:00
abstract::The doughing and manipulation times of a range of acrylic resin denture base polymers are presented in this study. The methods evaluated were: (i) probing following American Society for testing materials specification, F451-76; (ii) hole penetration following British Standard, 2487: 1989 and International Standard Org...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/0300-5712(92)90057-j
更新日期:1992-10-01 00:00:00
abstract:OBJECTIVE:This randomized controlled trial compared the survival of glass fibre and cast metal dental posts used to restore endodontically treated teeth with no remaining coronal wall. METHODS:Fifty-four participants (45 women) and 72 teeth were evaluated during a follow-up period of up to 3 years. Teeth were randomly...
journal_title:Journal of dentistry
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.jdent.2014.02.003
更新日期:2014-05-01 00:00:00
abstract:OBJECTIVES:One of the reasons for using composite inlays is that restorations can be tempered. Composites tempered with heat and light have, at least initially, an enhanced degree of cure which, it is claimed, improves their physical properties, including wear resistance. The aim of this study was to compare the wear r...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/0300-5712(95)00120-4
更新日期:1997-01-01 00:00:00
abstract:OBJECTIVES:To investigate the effectiveness of an indicator gel in revealing exposed dentine. METHODS:Teeth prepared into dentine and then stained with the indicator gel were sectioned for histological examination. RESULTS:The indicator gel was found to stain dentine and thin layers of enamel. CONCLUSION:The gel is ...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/0300-5712(94)00010-d
更新日期:1995-12-01 00:00:00
abstract:OBJECTIVES:Chlorhexidine (CHX) is a commonly used antiseptic mouthwash, used by dental practitioners and the public, due to its antimicrobial effects. The aim of this article was to provide a narrative review of current antimicrobial uses of CHX relevant to dentistry in the context of oral diseases, highlighting need f...
journal_title:Journal of dentistry
pub_type: 杂志文章,评审
doi:10.1016/j.jdent.2020.103497
更新日期:2020-12-01 00:00:00
abstract:PURPOSE:Evaluate the dentine bond strength using different methods of application of opaque resins to mask dentine discoloration. MATERIALS AND METHODS:Dentine was exposed on 21 extracted molars which were assigned to 3 groups: G1: immediate dentine sealing (IDS). G2: IDS+opaque. G3: IDS with adhesive resin mixed with...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2011.07.005
更新日期:2011-10-01 00:00:00
abstract:OBJECTIVES:To examine the effect of incorporating arginine in a 5% sodium fluoride (NaF) varnish on its remineralization potential and HGF-1 cytotoxicity. METHODS:Experimental varnishes were prepared using two arginine variants: l-arginine (Arg) and l-arginine monohydrochloride (Arg.HCl) at 2%, 4%, & 8% w/v. with cont...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2020.103411
更新日期:2020-08-01 00:00:00