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https://www.readbyqxmd.com/read/28213184/forensic-applications-fluorescence-properties-of-tooth-coloured-restorative-materials-using-a-fluorescence-dslr-camera
#1
Ramya Kiran, James Chapman, Alexander Forrest, Marc Tennant, Laurence J Walsh
The objective of this study was to compare the fluorescence properties of dry and wet samples of contemporary tooth-coloured restorative materials using a fluorescence based DSLR camera and a variety of LEDs emitting different wavelengths of visible light as excitation sources. The materials examined included resin composites; ceramics and hybrid restorative materials such as ormocers, Vita Enamic™ and resin reinforced glass-ionomer cements. The levels of fluorescence for each sample under different combinations of incident light wavelengths and filters was analysed by using histogram data for colour channels from Adobe Photoshop software...
February 3, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28212980/biofilm-formation-and-release-of-fluoride-from-dental-restorative-materials-in-relation-to-their-surface-properties
#2
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/28210443/evaluation-of-the-effect-of-adding-micro-hydroxyapatite-and-nano-hydroxyapatite-on-the-microleakage-of-conventional-and-resin-modified-glass-ionomer-cl-v-restorations
#3
Farahnaz Sharafeddin, Negar Feizi
BACKGROUND: Pulpal reaction to restorative materials depends on marginal microleakage, which is a dynamic phenomenon that allows bacteria and fluids to traverse across the tooth-restoration interface. Glass-ionomer cement (GIC) exhibits low microleakage due to direct bonding to tooth structures. Hydroxyapatite (HAP) based on the similarity with tooth structure may decrease the microleakage. The aim of this in vitro study was to evaluate marginal microleakage of a mixture of conventional and resin-modified glass-ionomer (RMGI) with micro- and nano-HAP...
February 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28209008/effect-of-resin-bonded-luting-agents-influencing-marginal-discrepancy-in-all-ceramic-complete-veneer-crowns
#4
Dhanraj Ganapathy, Anusha Sathyamoorthy, Hemalatha Ranganathan, Karthikeyan Murthykumar
INTRODUCTION: Marginal discrepancy severely affects the long term success of All ceramic complete veneer crowns. The precise role of resin luting agents influencing this phenomenon needs to be explored further. AIM: To estimate and compare the marginal discrepancy in CAD/CAM processed All ceramic complete veneer crowns prior and following luting with resin bonded luting agents. MATERIALS AND METHODS: Extracted human maxillary first premolars were randomly allocated into four groups of 27 samples each Viz...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28206891/survival-of-adhesive-restorations-for-primary-molars-a-systematic-review-and-metaanalysis-of-clinical-trials
#5
Ana Paula Santos, Ianny K D Moreira, Ana Carolina Scarpelli, Isabela A Pordeus, Saul M Paiva, Carolina C Martins
PURPOSE: The purpose of this study was to assess the scientific evidence regarding the survival and clinical performance of adhesive materials for primary molars, comparing composite resin (CR), conventional glass ionomer cement (GIC), resin-modified glass ionomer (RMGIC), silver-reinforced glass ionomer cement, and compomer. METHODS: Six databases were searched without restrictions regarding language or year of publication. Meta-analysis was conducted; risk ratios (RRs) and 95 percent confidence intervals (95% CI) were calculated...
October 15, 2016: Pediatric Dentistry
https://www.readbyqxmd.com/read/28203013/-curing-mode-of-universal-adhesives-affects-the-bond-strength-of-resin-cements-to-dentin
#6
Z R Fu, F C Tian, L Zhang, B Han, X Y Wang
OBJECTIVE: To determine the effects of curing mode of one-step and two-step universal adhesives on the micro-tensile bond strength (μTBS) of different dual-cure resin cements to dentin. METHODS: One-step universal adhesive Single Bond Universal (SBU), and two-step universal adhesive OptiBond Versa (VSA) were chosen as the subjects, one-step self-etching adhesive OptiBond All in One (AIO) and two-step self-etching adhesive Clearfil SE Bond (SEB) were control groups, and two dual-cure resin cements RelyX Ultimate (RLX) and Nexus 3 Universal (NX3) were used in this study...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28198977/degree-of-conversion-and-bond-strength-of-resin-cements-to-feldspathic-ceramic-using-different-curing-modes
#7
Veridiana Resende Novais, Luís Henrique Araújo Raposo, Rafael Resende de Miranda, Camila de Carvalho Almança Lopes, Paulo Cézar Simamoto, Carlos José Soares
Objective: The aim of this study was to assess the performance of resin cements when different curing modes are used, by evaluating the degree of conversion and bond strength to a ceramic substrate. Material and Methods: Three resin cements were evaluated, two dual-cured (Variolink II and RelyX ARC) and one light-cured (Variolink Veneer). The dual-cured resin cements were tested by using the dual activation mode (base and catalyst) and light-activation mode (base paste only)...
January 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28198970/is-the-bonding-of-self-adhesive-cement-sensitive-to-root-region-and-curing-mode
#8
Thaynara Faelly Boing, Giovana Mongruel Gomes, João Carlos Gomes, Alessandra Reis, Osnara Maria Mongruel Gomes
Objectives: To evaluate the influence of two curing techniques on the degree of conversion (DC) of resin cements and on bond strength (BS) of fiber posts in different regions of root dentin. Material and Methods: Twenty single-rooted premolars were endodontically treated, and the post spaces were prepared. The roots were randomly divided into two groups (n=10), according to the activation mode of the resin cement RelyX™ U200 (3M ESPE Saint Paul, MN, USA): conventional (continuous activation mode) and soft-start activation mode (Ramp)...
January 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28196165/effect-of-cervical-collar-removal-on-the-fracture-load-of-anterior-zirconia-crowns
#9
Fernanda Campos, Mayra Cardoso, Renata Marques de Melo, Marco Antonio Bottino, Rodrigo Oa Souza
The objective of this study was to assess the influence of the extension of collar and fatigue cycling on the fracture load of anterior zirconia crowns. A total of 60 anterior full-crown preparations (central incisor) were machined in glass fiber-filled epoxy resin. Zirconia copings were designed and milled using computer-aided design/computer-assisted manufacture (thickness: buccal = 0.62 mm, lingual = 0.65 mm, incisal = 0.72 mm). The cervical collars (occlusogingival height = 0.8 mm, buccolingual width = 1...
March 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28195273/light-transmission-of-novel-cad-cam-materials-and-their-influence-on-the-degree-of-conversion-of-a-dualcuring-resin-cement
#10
Ferhan Egilmez, Gulfem Ergun, Isil Cekic-Nagas, Pekka K Vallittu, Lippo V J Lassila
PURPOSE: To evaluate the light transmission characteristics of different types, shades, and thicknesses of novel CAD/CAM materials and their effect on the degree of conversion (DC) of a dual-curing resin cement. MATERIALS AND METHODS: Square specimens (12 × 12 mm2) of three CAD/CAM materials - GC Cerasmart, Lava Ultimate, Vita Enamic - of different thicknesses (1.00, 1.50, and 2.00 mm, n = 5 per thickness) were irradiated with an LED unit. The amount of transmitted light was quantified...
February 10, 2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/28195271/recent-trends-in-surface-treatment-methods-for-bonding-composite-cement-to-zirconia-a-reveiw
#11
Aftab Ahmed Khan, Abdul Aziz A Al Kheraif, Syed Jamaluddin, Mohamad Elsharawy, Darshan Devang Divakar
PURPOSE: To evaluate the in vitro studies conducted in the last six years on new zirconia materials to discover and explore current trends in bonding composite cement to zirconia substrate. MATERIALS AND METHODS: An in-depth review of the in vitro studies performed between 2010 and 2016 was conducted, focusing on the current trends in surface conditioning methods for zirconia ceramic. PubMed was used for searching the literature. Resin composite bonding to zirconia, zirconia surface coating, and zirconia surface treatment method were the keywords used...
February 10, 2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/28194358/effect-of-adhesive-luting-on-the-fracture-resistance-of-zirconia-compared-to-that-of-composite-resin-and-lithium-disilicate-glass-ceramic
#12
Myung-Jin Lim, Kwang-Won Lee
OBJECTIVES: The purpose of this study was to evaluate the effect of adhesive luting on the fracture resistance of zirconia compared to that of a composite resin and a lithium disilicate glass ceramic. MATERIALS AND METHODS: The specimens (dimension: 2 mm × 2 mm × 25 mm) of the composite resin, lithium disilicate glass ceramic, and yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) were prepared. These were then divided into nine groups: three non-luting groups, three non-adhesive luting groups, and three adhesive luting groups, for each restorative material...
February 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/28183617/physical-chemical-and-antimicrobial-evaluation-of-a-composite-material-containing-quaternary-ammonium-salt-for-braces-cementation
#13
Mari Miura Sugii, Fábio Augusto de Souza Ferreira, Karina Cogo Müller, Debora Alves Nunes Leite Lima, Francisco Carlos Groppo, Hidetake Imasato, Ubirajara Pereira Rodrigues-Filho, Flávio Henrique Baggio Aguiar
The antibiofilm effect of iodide quaternary ammonium methacryloxy silicate (IQAMS) in Transbond XT Light Cure Adhesive resin used for braces cementation was evaluated. Fourier Transform Infrared (FTIR) spectroscopy confirmed IQAMS formation and Scanning Electron Microscopy coupled to Energy-Dispersive X-ray Spectroscopy (SEM-EDS) revealed that as coating, the quaternary ammonium groups from IQAMS were homogeneously dispersed throughout the surface. When incorporated, the composite material presented homogeneous dispersion throughout the resin...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28179935/shear-bond-strength-of-self-adhering-flowable-composite-and-resin-modified-glass-ionomer-to-two-pulp-capping-materials
#14
Maryam Doozaneh, Fatemeh Koohpeima, Maryam Firouzmandi, Forugh Abbassiyan
INTRODUCTION: The aim of this study was to compare the shear bond strength of a self-adhering flowable composite (SAFC) and resin-modified glass ionomer (RMGI) to mineral trioxide aggregate (MTA) and calcium-enriched mixture (CEM) cement. METHODS AND MATERIALS: A total of 72 acrylic blocks with a central hole (4 mm in diameter and 2 mm in depth) were prepared. The holes were filled with MTA (sub group A) and CEM cement. The specimens of both restorative materials were divided into 6 groups; overall there were 12 groups...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28174009/ceramic-strengthening-by-tuning-the-elastic-moduli-of-resin-based-luting-agents
#15
Aloísio O Spazzin, Ataís Bacchi, Rodrigo Alessandretti, Mateus B Santos, Gabriela R Basso, Jason Griggs, Rafael R Moraes
OBJECTIVE: Resin-based luting agents (RBLAs) with tuned elastic moduli (E) were prepared and their influence on the strengthening, reliability, and mode of failure of luted feldspar ceramic was investigated. METHODS: RBLAs with low E (2.6GPa), intermediate E (6.6GPa), and high E (13.3GPa) were prepared and used to coat acid-etched ceramic disks. Positive (untreated ceramic) and negative (acid-etched ceramic) control groups were tested. The response variables (n=30) were biaxial flexural strength (σbf, MPa), characteristic strength (σ0, MPa), and Weibull modulus at the ceramic surface (z=0) and luting agent surface (z=-t2)...
February 4, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28164256/torque-differences-due-to-the-material-variation-of-the-orthodontic-appliance-a-finite-element-study
#16
Spyridon N Papageorgiou, Ludger Keilig, Vaska Vandevska-Radunovic, Theodore Eliades, Christoph Bourauel
BACKGROUND: Torque of the maxillary incisors is crucial to occlusal relationship and esthetics and can be influenced by many factors. The aim of this study was to assess the relative influence of the material of the orthodontic appliance (adhesive, bracket, ligature, and wire) on tooth displacements and developed stresses/strains after torque application. METHODS: A three-dimensional upper right central incisor with its periodontal ligament (PDL) and alveolus was modeled...
December 2017: Progress in Orthodontics
https://www.readbyqxmd.com/read/28159346/influence-of-an-iodonium-salt-on-the-properties-of-dual-polymerizing-self-adhesive-resin-cements
#17
Carolina Rocha Augusto, Vicente Castelo Branco Leitune, Fabrício Aulo Ogliari, Fabrício Mezzomo Collares
STATEMENT OF PROBLEM: Dual-polymerizing self-adhesive resin cements present mechanical properties that may adversely affect the clinical performance of luted fiber-reinforced posts. PURPOSE: The purpose of this in vitro study was to evaluate the properties of dual-polymerizing self-adhesive resin cements after the addition of an onium salt. MATERIAL AND METHODS: The experimental groups were set according to the molar concentration of diphenyliodonium hexafluorphosphate (DPIHFP) (0...
January 31, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28149471/bond-strength-of-adhesive-resin-cement-with-different-adhesive-systems
#18
Fabrizio Lorenzoni E Silva, Saulo Pamato, Milton-Carlos Kuga, Marcus-Vinicius-Reis Só, Jefferson-Ricardo Pereira
BACKGROUND: To assess the immediate bond strength of a dual-cure adhesive resin cement to the hybridized dentin with different bonding systems. MATERIAL AND METHODS: Fifty-six healthy human molars were randomly divided into 7 groups (n=8). After 3 longitudinal sections, the central cuts were included in PVC matrix and were submitted to dentin hybridization according to the groups: G1 - etch & rinse system with 3-step (Apder™ Scotchbond™ Multi-Purpose, 3M ESPE), G2 - etch & rinse system with 3-step (Optibond™ FL, Kerr), G3 - etch & rinse system with 3-step (All-Bond 3®, Bisco), G4 - etch & rinse simplified system (Adper™ Single Bond 2, 3M ESPE), G5 - self-etching system with one step (Bond Force, Tokuyama), G6 - universal system in moist dentin (Single Bond Universal, 3M ESPE), G7 - universal system in dry dentin (Single Bond Universal, 3M ESPE)...
January 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28148310/oral-function-improves-interfacial-integrity-and-sealing-ability-between-conventional-glass-ionomer-cements-and-dentin
#19
Manuel Toledano, Raquel Osorio, Inmaculada Cabello, Estrella Osorio, Manuel Toledano-Osorio, Fátima S Aguilera
The aim of this study was to investigate if load cycling affects interfacial integrity of glass ionomer cements bonded to sound- or caries-affected dentin. A conventional glass ionomer, Ketac Bond, and a resin-modified glass ionomer (Vitrebond Plus), were applied to dentin. Half of the specimens were load cycled. The interfaces were submitted to dye-assisted confocal microscopy evaluation. The unloaded specimens of sound and carious dentin were deficiently hybridized when Ketac Bond was used. Ketac Bond samples showed an absorption layer and an adhesive layer that were scarcely affected by fluorescein penetration (nanoleakage), in sound dentin...
February 2, 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/28138190/effects-of-medical-and-mental-status-on-treatment-modalities-in-patients-treated-under-general-anaesthesia-at-the-ktu-faculty-of-dentistry-in-trabzon-turkey-a-comparative-retrospective-study
#20
Ozgul Baygin, Tamer Tuzuner, Adem Kusgoz, Gorkem Yahyaoglu, Nagehan Yilmaz, Simge Aksoy
This study evaluated the differences in dental conditions and treatment modalities between disabled and non-cooperative healthy children under general anaesthesia. The data were collected from paediatric patients between 3 and 15 years of age who received dental treatment under general anaesthesia. Patients with at least one mental/physical disturbance (group 1) and other healthy non-cooperative patients (group 2) were compared with regard to gender, age, weight, and treatment time-type. The statistical analyses were performed using Fisher's exact and Mann-Whitney U tests...
February 2017: JPMA. the Journal of the Pakistan Medical Association
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