Abstract:
OBJECTIVES:Newer tricalcium silicate cements (TSC) may offer biocompatibility with improved working properties. This study aimed to evaluate: (1) the occurrence of mineral deposition at the interface between dentine and two TSC (ProRoot(®) MTA and Biodentine(®)) in simulated body fluid, and (2) to investigate the nature of interfacial layer. METHODS:Six root dentine segments of 1.5mm thickness were obtained from extracted human teeth and were instrumented with Gates-Glidden drills. The specimens were then randomly filled with either MTA or Biodentine. The specimens were placed in the simulated body fluid containing the same phosphate concentration as blood plasma. After 4 weeks, the specimens were examined with Scanning Electron Microscope (SEM) and Energy Disperse X-ray Spectroscopy (EDX) to measure the thickness of the interfacial layer and Ca/P ratio. Transmission Electron Microscope (TEM) and Selective Area Electron Diffraction (SAED) were conducted to examine the interface ultramicroscopically and to determine the nature of the crystalline structure within interfacial layer. RESULTS:The thickness of interfacial layer was significantly higher in the MTA group (14.5 μm vs 4.8 μm) (p<0.001). However, there was no significant difference between MTA and Biodentine in Ca/P ratio of interfacial layer (4.1 vs 2.7) (p>0.05). From TEM examination, amorphous calcium phosphate (ACP) was observed in the interface along with the surface of dentine. CONCLUSIONS:As an alternative to MTA, Biodentine displayed bioactivity by producing an interfacial layer on the root canal dentine even though its thickness was significantly lower than MTA. ACP was observed in the interfacial layer of both biomaterials. CLINICAL SIGNIFICANCE:Biodentine could be considered as an alternative to MTA due to comparable bioactivity which creates interfacial layer between root canal dentin and Biodentine.
journal_name
J Dentjournal_title
Journal of dentistryauthors
Kim JR,Nosrat A,Fouad AFdoi
10.1016/j.jdent.2014.11.004subject
Has Abstractpub_date
2015-02-01 00:00:00pages
241-7issue
2eissn
0300-5712issn
1879-176Xpii
S0300-5712(14)00324-8journal_volume
43pub_type
杂志文章abstract:OBJECTIVES:This study investigated the effects of the surface conditioning of nano-zirconia fillers with 10-methacryloyloxydecyl dihydrogen phosphate (MDP) and dipentaerythritol penta-acrylate phosphate (PENTA) on the degree of conversion and mechanical properties of Bis-GMA- and UDMA-based resin composites containing ...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2020.103306
更新日期:2020-03-01 00:00:00
abstract:OBJECTIVES:Purpose of this study was to determine the influence of grey-scale reversal of digital radiographic images on the detection of proximal caries. METHODS:Five observers assessed digital bitewing radiographs (Sidexis((R)), Sirona) of 320 unrestored surfaces of extracted posterior teeth embedded in 20 models, s...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2004.08.003
更新日期:2005-01-01 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:The aim of this study was to test the hypothesis that cross-polarization optical coherence tomography (CP-OCT) can be used to longitudinally monitor demineralization peripheral to orthodontic brackets in an extended clinical study. METHODS:A high-speed CP-OCT system was used to acquire 3D volumetric images ...
journal_title:Journal of dentistry
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.jdent.2014.02.011
更新日期:2014-05-01 00:00:00
abstract:OBJECTIVES:The purpose of the study was to investigate denture satisfaction related to treatment modality, age, gender, denture quality, chewing ability, denture experience and patients' attitude towards denture wearing. METHODS:In a randomized controlled clinical trial 74 patients who required immediate denture thera...
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(96)00012-7
更新日期:1997-03-01 00:00:00
abstract:OBJECTIVE:The shear bond strengths of an autopolymerizing denture base resin to cast Ti-6Al-7Nb and Co-Cr alloys using three metal conditioners were investigated. METHODS:Ti-6Al-7Nb alloy and Co-Cr alloy discs were cast. The disc surfaces were air-abraded with 50 microm alumina particles and treated with three metal c...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2005.05.002
更新日期:2006-02-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to investigate new dentin bonding agents formulated with 2,3-epithiopropyl methacrylate (ETMA) comonomer blends. METHODS:Synthesis and characterization of ETMA were performed. Adhesive resins with three different ETMA concentrations (0.1, 1 and 10 wt.%) were prepared. To comparison...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2005.11.001
更新日期:2006-08-01 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: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:OBJECTIVE:To compare the effect of QMix (Dentsply Sirona), 7% maleic acid (MA), and 17% ethylenediaminetetraacetic acid (EDTA) on the microhardness, flexural strength and microstructure of mineral trioxide aggregate (MTA; ProRoot MTA, Dentsply Sirona). METHODS:Forty MTA specimens were divided into four groups: [I] QMi...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2017.08.018
更新日期:2017-11-01 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:Methacrylic compounds such as 2-hydroxyethyl methacrylate (HEMA), triethylene glycol dimethacrylate (TEGDMA) and bisphenol A glycerolate (1 glycerol/phenol) dimethacrylate (Bis-GMA) are largely present in auto- or photopolymerizable composite resins. Since the polymerization reaction is never complete, these...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2006.07.008
更新日期:2007-03-01 00:00:00
abstract:OBJECTIVES:To determine the correlation between fracture toughness and leucite content in dental porcelains. The mechanisms by which leucite influences the fracture toughness of dental porcelains were also investigated. METHODS:Six porcelains were tested: A (Ceramco I/Dentsply), B (Ceramco II/Dentsitply), C (Finesse/D...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2005.02.001
更新日期:2005-10-01 00:00:00
abstract:OBJECTIVE:This study investigated the mechanism of action at the interface between a commercially available Y-TZP and its veneering ceramic after final firing. Particular attention was paid, from a microstructural point of view, to evaluating the effects of different surface treatments carried out on the zirconia. MET...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2014.07.019
更新日期:2014-11-01 00:00:00
abstract::The effect of various surface treatments on the shear bond strength of composite resin to a glass-ionomer cement has been studied. Acid etching with phosphoric acid and polyacrylic acid, roughening by way of grinding or air drying, the use of a dentine bonding system and a silane coupling agent were the variables. Aci...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/0300-5712(89)90004-3
更新日期:1989-02-01 00:00:00
abstract:PURPOSE:Develop a methodology to correlate microtensile bond strength (microTBS) and leakage within the same site of a specimen and evaluate the predominate debond and leakage pathways. MATERIALS AND METHODS:A Class II (MO) slot cavity was prepared in 37 extracted human molars and restored with indirect resin composit...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/s0300-5712(00)00065-8
更新日期:2001-02-01 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: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:The aim of this study was to investigate the influence of a fiber post on the fracture mechanics of zirconia crowns inserted over endodontically treated teeth with different extent of coronal damage. METHODS:Endodontically treated human molars with three types of coronal damage received fiber posts before ce...
journal_title:Journal of dentistry
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.jdent.2008.03.014
更新日期:2008-07-01 00:00:00
abstract:OBJECTIVE:To evaluate a novel methodology using industrial scanners as a reference, and assess in vivo accuracy of 3 intraoral scanners (IOS) and conventional impressions. Further, to evaluate IOS precision in vivo. METHODS:Four reference-bodies were bonded to the buccal surfaces of upper premolars and incisors in fiv...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2017.12.006
更新日期:2018-02-01 00:00:00
abstract:OBJECTIVE:The aim of this in vivo study was to investigate the influence of age on optical properties of pure enamel and enamel-dentine complex. METHODS:A spectrophotometric study was performed on two different age groups: young (10-35 years old) and adult (36-60 years old). In both groups, the tooth's total area of t...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2013.09.005
更新日期:2013-12-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to evaluate the induced changes in the chemical and mechanical performance at the glass-ionomer cement-dentin interface after mechanical load application. METHODS:A conventional glass-ionomer cement (GIC) (Ketac Bond), and a resin-modified glass-ionomer cement (RMGIC) (Vitrebond Plu...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2018.04.006
更新日期:2018-06-01 00:00:00
abstract:OBJECTIVES:The study aims at demonstrating the feasibility of a novel type of coupling-agent-free resin composite based on nano-porous fillers. METHODS:The fillers were obtained by ball-milling anodic alumina membranes. Composites were prepared with standard resin at maximum loading of 50% by weight. The resin matrix ...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2013.12.001
更新日期:2014-03-01 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:OBJECTIVE:To evaluate the effect of compounds of Galla chinensis on the remineralisation of initial enamel carious lesions in vitro. METHODS:Sixty bovine enamel blocks with early lesions were prepared and randomly divided into six treatment groups. The lesions were subjected to a pH-cycling regime for 12 days. Each da...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2006.11.007
更新日期:2007-05-01 00:00:00
abstract::Ultrasound in the kHz frequency range is used widely in clinical dentistry. The most common uses are in the fields of periodontology and endodontics. The ultrasonic scaler works by the vibratory chipping action of the oscillating tip and is assisted by the presence of cavitational activity in the associated cooling wa...
journal_title:Journal of dentistry
pub_type: 杂志文章,评审
doi:10.1016/0300-5712(92)90003-u
更新日期:1992-02-01 00:00:00
abstract:OBJECTIVES:To analyse the effect of first and second premolar extractions on eruption space for upper and lower third molars and on third molar position and angulation during orthodontic treatment. METHODS:The sample consisted of 296 patients of which 218 patients were orthodontically treated without extraction and 78...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2017.03.007
更新日期:2017-06-01 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: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:OBJECTIVES:Failure of the enamel adjacent to the defects in teeth with molar incisor hypomineralization (MIH) limits the success rate of the restorations placed in these teeth and this frequently leads to their ultimate extraction. To understand the cause, a state-of-the-art combination of focused ion beam (FIB) and na...
journal_title:Journal of dentistry
pub_type: 杂志文章
doi:10.1016/j.jdent.2009.11.003
更新日期:2010-03-01 00:00:00