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Journal of Dentistry

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https://www.readbyqxmd.com/read/28322885/fluoride-concentration-in-saliva-and-biofilm-fluid-following-the-application-of-three-fluoride-varnishes
#1
L Al Dehailan, F Lippert, C González-Cabezas, G J Eckert, E A Martinez-Mier
OBJECTIVE: Most of the commercially available fluoride varnishes (FV) have not been evaluated for their cariostatic properties. Consequently, the aim of this in vivo study was to investigate intra-oral fluoride retention and clearance patterns from three different FV. METHODS: Eighteen subjects (7-11 years) participated in a laboratory analyst-blinded, randomized, crossover study comparing the ability of 5% sodium fluoride varnishes (CavityShield-CS, Enamel Pro-EP, Vanish-V) to enhance fluoride concentrations in biofilm fluid, centrifuged and whole saliva over a period of 48h after a single FV application...
March 16, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28315376/effect-of-a-novel-quaternary-ammonium-silane-cavity-disinfectant-on-durability-of-resin-dentine-bond
#2
D Umer, C K Y Yiu, M F Burrow, L-N Niu, F R Tay
OBJECTIVE: The present study examined the effect of a quaternary ammonium silane (QAS) cavity disinfectant on the viability of human dental pulp cells, dentine bond durability and nanoleakage of simplified etch-and-rinse adhesives. METHODS: Etched dentine surface of third molars were randomly divided into two adhesive groups, Adper™ Single Bond 2 and Prime & Bond(®) NT™. For each adhesive, the teeth were randomly assigned to five cavity disinfectant groups (N=6): Group 1: deionised water (control); Group 2: 2% chlorhexidine (CHX); Group 3: 2% QAS; Group 4: 5% QAS and Group 5: 10% QAS...
March 14, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28286174/imaging-resin-infiltration-into-non-cavitated-carious-lesions-by-optical-coherence-tomography
#3
Hartmut Schneider, Kyung-Jin Park, Claudia Rueger, Dirk Ziebolz, Felix Krause, Rainer Haak
OBJECTIVES: Visualisation of the etching process and resin penetration at white spot carious lesions by spectral domain optical coherence tomography (SD-OCT). MATERIALS AND METHODS: The non-cavitated carious lesions (ICDAS code 2) of four visually preselected extracted human molars and premolars were verified as enamel lesions by micro computed tomography (μCT). One region of interest (ROI) per tooth was marked by two drill-holes in occlusal-cervical direction...
March 9, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28274651/translucent-zirconia-in-the-ceramic-scenario-for-monolithic-restorations-a-flexural-strength-and-translucency-comparison-test
#4
Michele Carrabba, Andrew J Keeling, Aziz Aziz, Alessandro Vichi, Riccardo Fabian Fonzar, David Wood, Marco Ferrari
OBJECTIVE: To compare three different compositions of Yttria-Tetragonal Zirconia Polycrystal (Y-TZP) ceramic and a lithium disilicate ceramic in terms of flexural strength and translucency. METHODS: Three zirconia materials of different composition and translucency, Aadva ST [ST], Aadva EI [EI] and Aadva NT [NT](GC Tech, Leuven, Belgium) were cut with a slow speed diamond saw into beams and tabs in order to obtain, after sintering, dimensions of 1.2×4.0×15.0mm and 15...
March 6, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28267581/comparison-of-in-vitro-dentinal-tubule-occluding-efficacy-of-two-different-methods-using-a-nano-scaled-bioactive-glass-containing-desensitising-agent
#5
Qian Ma, Tianda Wang, Qingfei Meng, Xiao Xu, Huaying Wu, Dongjing Xu, Yaming Chen
OBJECTIVE: This study aimed to compare the in vitro dentinal tubule occluding efficacy of two different methods using a nano-scaled bioactive glass (BG)-containing desensitising agent. METHODS: Citric acid treated dentine discs were randomly divided into 7 groups (n=8). Group A1, A2 and A3: dentine discs coated with BG desensitising paste; Group B1, B2 and B3: dentine discs coated with BG desensitising paste and covered with matched transparent trays; and control group (GroupC): dentine discs treated with deionised water...
March 4, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28257993/release-of-monomers-from-composite-dust
#6
S M Cokic, R C Duca, L Godderis, P H Hoet, J W Seo, B Van Meerbeek, K L Van Landuyt
OBJECTIVES: Dental personnel are more at risk to develop asthmatic disease, but the exact reason is so far unknown. During abrasive procedures, dental personnel are exposed to nano-sized dust particles released from dental composite. The aim of this study was to investigate whether respirable composite dust may also release monomers. METHODS: Respirable (<5μm) composite dust was collected and the release of methacrylate monomers and Bisphenol A (BPA) in water and ethanol was evaluated by liquid chromatography/mass spectroscopy (LC-MS/MS)...
March 1, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28249744/effects-of-tooth-brushing-force-with-a-desensitising-dentifrice-on-dentine-tubule-patency-and-surface-roughness
#7
F Mullan, S Paraskar, D W Bartlett, R C Olley
OBJECTIVES: To investigate the effects of a 5% NovaMin containing dentifrice on dentine tubule patency and surface roughness at 100g and 400g tooth brush abrasion forces. METHODS: 75 polished human dentine samples were prepared and randomly allocated into one of five groups; control (1), Na2PFO3 100g abrasion force (2), NovaMin 100g (3), Na2PFO3 400g (4) and NovaMin 400g (5). The control group underwent two 2-min cycles of artificial saliva (AS), one 2-min erosion cycle; the rest underwent two toothbrush abrasion cycles in an AS/dentifrice slurry and one 2-min erosion cycle...
February 27, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28215957/an-approach-to-understanding-tribological-behaviour-of-dental-composites-through-volumetric-wear-loss-and-wear-mechanism-determination-beyond-material-ranking
#8
Asmaa Altaie, Nigel L Bubb, Paul Franklin, Adam H Dowling, Garry J P Fleming, David J Wood
OBJECTIVE: To investigate the fundamental wear mechanisms of six resin-based composite (RBC) formulations during short-term in vitro wear testing. MATERIALS: RBC materials were condensed into rectangular bar-shaped specimens and light irradiated using the ISO 4049 specimen manufacture and irradiation protocol. Wear testing (n=10 specimens for each RBC) was performed on a modified pin-on-plate wear test apparatus and wear facets were analysed for wear volume loss using a white light profilometer...
February 25, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28212979/degradation-of-optical-and-surface-properties-of-resin-based-composites-with-distinct-nanoparticle-sizes-but-equivalent-surface-area
#9
Vinícius Esteves Salgado, Larissa Maria Cavalcante, Rafael R Moraes, Harry B Davis, Jack L Ferracane, Luis Felipe Schneider
OBJECTIVE: To determine the optical and surface properties of model resin-based composites made with distinct nanoparticle sizes but equalized surface area, among them, before and after ageing. METHODS: Model resin-based composites based on BisGMA/TEGDMA (50:50mol%) were loaded with three different fumed silica filler content (7nm/examethyldisilazane, 12nm/octylsilane, and 16nm/dimethylchlorosilane), but with equivalent surface area (BET method). The optical and surface properties of the disk-shaped specimens were measured in 24h after photoactivation (baseline) and repeated after water storage (90days at 37°C), and after abrasion (20,000 cycles of brushing)...
February 25, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28212978/a-systematic-review-of-the-survival-and-complication-rates-of-inlay-retained-fixed-dental-prostheses
#10
REVIEW
Junyu Chen, He Cai, Lai Suo, Yiyuan Xue, Jian Wang, Qianbing Wan
OBJECTIVES: The aim of this systematic review was to investigate the survival and complication rates of inlay-retainer fixed dental prostheses (IRFDPs). DATA/SOURCES: A systematic search was conducted in the PubMed, EMBASE, and Cochrane Library databases in English and time filters (articles published from 1960) were used. STUDY SELECTION: Randomized controlled trails (RCTs), controlled clinical trials (CCTs) and prospective cohort studies on IRFDPs with a mean follow-up period of at least 2 years were included...
February 23, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28237629/effectiveness-of-pre-treatment-with-chlorhexidine-in-restoration-retention-a-36-month-follow-up-randomized-clinical-trial
#11
Morgana Favetti, Thaiane Schroeder, Anelise Fernandes Montagner, Marcos Britto Correa, Tatiana Pereira-Cenci, Maximiliano Sergio Cenci
OBJECTIVES: This study evaluated the effect of the pre-treatment with 2% chlorhexidine digluconate (CHX) as coadjutant in restoration retention of noncarious cervical lesions (NCCL), after 36 months of follow-up. METHODS: A randomized controlled split-mouth and triple-blind (operators, patients and evaluator) trial was carried out. Patients (n=42) with at least two non-carious cervical lesions were included. The teeth with NCCL were randomly assigned to two treatment groups: application of 2% CHX (experimental group) or a placebo solution (control group) for 60s after acid etching and before the adhesive application...
February 22, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28232081/a-novel-approach-to-study-in-situ-enamel-erosion-and-abrasion-lesions
#12
M A Ablal, A Milosevic, A J Preston, S M Higham
OBJECTIVES: This study investigated previous hypotheses that the tongue can abrade acid softened/eroded enamel surfaces. METHODS: Twelve upper removable appliances each retaining 2 anterior and 2 posterior human enamel specimens were constructed. Each specimen was exposed to acid on both surfaces, but only one surface was allowed contact with the tongue. Therefore, 96 surfaces were assessed. Appliances were worn from 9.30 to 17.00 Monday to Friday for 22days. Acid eroded lesions were created by immersing the specimens for 5min in 50ml orange juice three times daily...
February 21, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28232082/repair-vs-replacement-of-direct-composite-restorations-a-survey-of-teaching-and-operative-techniques-in-oceania
#13
Paul A Brunton, Amna Ghazali, Zahidah H Tarif, Carolina Loch, Christopher Lynch, Nairn Wilson, Igor R Blum
OBJECTIVES: To evaluate the teaching and operative techniques for the repair and/or replacement of direct resin-based composite restorations (DCRs) in dental schools in Oceania. METHODS: A 14-item questionnaire was mailed to the heads of operative dentistry in 16 dental schools in Oceania (Australia, New Zealand, Fiji and Papua New Guinea). The survey asked whether the repair of DCRs was taught within the curriculum; the rationale behind the teaching; how techniques were taught, indications for repair, operative techniques, materials used, patient acceptability, expected longevity and recall systems...
February 20, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28223199/poly-methyl-methacrylate-with-tio2-nanoparticles-inclusion-for-stereolitographic-complete-denture-manufacturing-the-fututre-in-dental-care-for-elderly-edentulous-patients
#14
Eugenia Eftimie Totu, Aurelia Cristina Nechifor, Gheorghe Nechifor, Hassan Y Aboul-Enein, Corina Marilena Cristache
OBJECTIVES: The aim of this study was to obtain a Poly(methylmethacrylate) (PMMA)-TiO2 nanocomposite material with improved antibacterial characteristics, suitable for manufacturing 3D printed dental prosthesis. METHODS: 0.2, 0.4, 0.6, 1, 2.5 by weight% of TiO2 nanoparticles have been added to the commercially available stereolithographic PMMA material and the obtained nanocomposites have been analyzed using FTIR, SEM and also tested for antimicrobial efficacy against bacterial cultures from Candida species (C...
February 20, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28223198/novel-bioactive-root-canal-sealer-to-inhibit-endodontic-multispecies-biofilms-with-remineralizing-calcium-phosphate-ions
#15
Lin Wang, Xianju Xie, Chunyan Li, Huaibing Liu, Ke Zhang, Yanmin Zhou, Xiaofeng Chang, Hockin H K Xu
OBJECTIVE: The objectives of this study were to: (1) develop a bioactive endodontic sealer via dimethylaminohexadecyl methacrylate (DMAHDM), 2-methacryloyloxyethyl phosphorylcholine (MPC) and nanoparticles of amorphous calcium phosphate (NACP) for the first time; and (2) evaluate inhibition of early-stage and mature multispecies endodontic biofilm, bond strength to root canal dentin, and calcium (Ca) and phosphate (P) ion release. METHODS: A series of bioactive endodontic sealers were formulated with DMAHDM, MPC, and NACP...
February 18, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28219674/exploratory-randomised-controlled-clinical-study-to-evaluate-the-comparative-efficacy-of-two-occluding-toothpastes-a-5-calcium-sodium-phosphosilicate-toothpaste-and-an-8-arginine-calcium-carbonate-toothpaste-for-the-longer-term-relief-of-dentine-hypersensitivity
#16
Claire Hall, Stephen Mason, Jonathan Cooke
OBJECTIVE: To compare the longer-term clinical efficacy of two occlusion-technology toothpastes - a 5% calcium sodium phosphosilicate (CSPS) toothpaste and a commercially available 8% arginine/calcium carbonate toothpaste - in relieving dentine hypersensitivity (DH). Efficacy was also compared with that of a regular fluoride toothpaste control. METHODS: This was an exploratory, randomised, examiner-blind, parallel-group, 11-week, controlled study in healthy adults with self-reported and clinically diagnosed DH...
February 17, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28214537/biomechanical-behavior-of-endodontically-treated-premolars-using-different-preparation-designs-and-cad-cam-materials
#17
Diogo Pedrollo Lise, Annelies Van Ende, Jan De Munck, Thaís Yumi Umeda Suzuki, Luiz Clovis Cardoso Vieira, Bart Van Meerbeek
OBJECTIVES: To evaluate the effect of restoration design ('2.5-mm deep endocrown', '5-mm deep endocrown' or '5-mm deep post&crown') and CAD/CAM material type (composite or lithium disilicate glass-ceramic) on the load-to-failure of endodontically treated premolars in absence of any ferrule. METHODS: The crowns of 48 single-rooted premolars were cut and the roots were endodontically treated. Teeth were randomly divided into six groups (n=8); teeth in each group were restored using one of the two tested materials with standardized CAD/CAM fabricated endocrowns (with either 2...
February 15, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28212980/biofilm-formation-and-release-of-fluoride-from-dental-restorative-materials-in-relation-to-their-surface-properties
#18
Sebastian Hahnel, Andrei C Ionescu, Gloria Cazzaniga, Marco Ottobelli, Eugenio Brambilla
OBJECTIVES: To elucidate the impact of surface properties and the release of fluoride from different glass ionomer cements on biofilm formation. METHODS: Standardized specimens manufactured from various classes of glass ionomer cements (GICs), a resin-based composite (RBC), and human enamel were subjected to surface analyses. Subsequent to simulation of salivary pellicle formation, Streptococcus mutans biofilm formation was initiated using a drip flow reactor for 48h and 96h...
February 14, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28189719/is-a-basic-erosive-wear-examination-bewe-reliable-for-recording-erosive-tooth-wear-on-3d-models
#19
Viivi Alaraudanjoki, Henna Saarela, Reetta Pesonen, Marja-Liisa Laitala, Heikki Kiviahde, Leo Tjäderhane, Adrian Lussi, Paula Pesonen, Vuokko Anttonen
OBJECTIVES: To assess the reliability of the BEWE index on 3D models and to compare 3D-assessed erosive tooth wear scores with clinically detected scores. METHODS: In total, 1964 members of the Northern Finland Birth Cohort 1966 participated in a standardized clinical dental examination including the Basic Erosive Wear Examination (BEWE) and dental 3D modelling at the age of 45-46 years. Of those examined, 586 were randomly selected for this study. 3D models were assessed using the same BEWE criteria as in the clinical examination...
February 9, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28189718/confounding-factors-affecting-the-marginal-quality-of-an-intra-oral-scan
#20
Andrew Keeling, Jinhua Wu, Marco Ferrari
OBJECTIVES: To assess the effect of clinical factors on the quality of intra-oral scans of crown margins. These factors are; presence of adjacent teeth, proximity to gingivae, encumbrance of wand positioning within oral cavity. METHODS: A typodont lower molar (Frasaco, Germany) was prepared for an all-ceramic crown with 1.5mm supragingival (lingual) and equigingival (buccal) margins. The tooth was scanned in a model scanner, creating a master scan. An intra-oral scanner (IOS) (Omnicam, Sirona Dental) was used to acquire sets of 5 scans each, under varying conditions; (1) the presence/absence of adjacent teeth, (2) model mounted in manikin head/hand-held, (3) with/without a 1mm shim to elevate the margin...
February 9, 2017: Journal of Dentistry
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