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Showing 1 to 20 of 36 for “"Glass ionomer"”.
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Spectroscopic investigations of new glass-ionomer dental cements
… used to study conventional and resin modified glass-ionomer dental cements by monitoring the integrated peak intensities of signals arising from chromium ions in the aluminium oxide matrix as a function of reaction time.;Different conventional cements were prepared by mixing Fuji II glass with …
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Release of antimicrobial compounds from glass-ionomer dental cements
… a study of the possibility of using conventional glass-ionomer cements (GICs) as matrices for release of antimicrobial compounds. Sodium fusidate, cetyl pyridinium chloride (CPC), benzalkonium chloride (BACH), triclosan and triclosan/zinc citrate at concentrations ranging from 1% to 5% by weight …
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The kinetics of ion release by glass-ionomer cements
… one in-house conventional GIC made from G338 glass powder, one commercial glass-ionomer bone cement and four in-house novel aluminium free Fe2O3 based GICs. Cylindrical specimens of GICs were prepared in stainless steel moulds to form 6 mm height x 4 mm diameter cylinders which were then …
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Mechanical properties of a new zinc-reinforced glass ionomer restorative material
Objective: Zinc-reinforced glass ionomer restorative material (ZRGIC) has been proposed as an improved restorative material. The study compared the mechanical properties of a ZRGIC restorative material (ChemFil Rock, (Dentsply)), with three commercially available glass ionomers (GICs); Fuji IX GP …
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Evaluation of Shear Bond Strength of Two Resin-Modified Glass-Ionomer Cements
… a new paste-paste formulation of resin-modified glass-ionomer cement (Rm-GIC) to an exising powder-liquid formulation. The study will test the hypothesis that the new paste-paste formulation of Rm-GIC (Fuji-Cem ™, GC Corp, Tokyo, Japan) has the same bond strength as an existing popular …
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Evaluation of Tensile Bond Strength of Glass Ionomer Cements for Orthodontic Bonding
Glass ionomer cements offer advantages over conventional composite resins when used for orthodontic bonding. These include chemical bonding to enamel, fluoride release, and ease of removal from enamel upon debonding. This study evaluated the tensile bond strengths of three Type I (luting) and three …
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Surface properties and the bioactivity of glass-ionomer dental cements and related materials
… and modification of the surface hardness of glass-ionomer dental cements was investigated in the studies discussed in this thesis to allow the range of clinical applications of these cements to be extended. Storing the cements in non-aqueous media whilst heating at 60 oC increased the surface …
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Effects Of Delayed Polymerization Time and Bracket Manipulation on Orthodontic Resin Modified Glass Ionomer Adhesive
… index (ARI) score when using a resin modified glass ionomer (RMGI) adhesive. Specimens were divided into three groups of clinically relevant delay times (0.5, 2, and 4-min) to simulate the delay that frequently occurs between bracket placement and manipulation and subsequent light curing. Based …
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Clinical Evaluation of Glass Ionomer Cement as an Adhesive for the Bonding of Orthodontic Brackets
Glass ionomer cement has been shown in previous studies to retard decalcification and caries formation. This cement would be valuable in orthodontics if it proved to have adequate adhesive properties. Therefore, this study was designed to determine if there is a significant difference in the …
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ULTRASONIC ROOT-END PREPARATION AND SEALING ABILITY OF CONVENTIONALLY-SETTING GLASS IONOMER CEMENTS IN SURGICAL ENDODONTICS
… (CFP) was performed. The conventionally-setting glass ionomer (GIC) Fuji IX showed least leakage. CFP demonstrated through pores in all teeth, whereas FTM did not. CFP appeared to be a useful method for leakage evaluation. In chapter 3 and 4 the long term sealing ability of root-end filling …
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Microleakage in new resin-modified glass ionomer cements using new no-rinse conditioners : an in-vitro study
Since their introduction in 1970, glass ionomer cements have been used in a wide variety of clinical situations in dentistry. The main advantages of glass ionomer cements are chemical bonding, fluoride release and uptake, excellent seal against microleakage, and biocompatibility. The main objective …
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Evaluation of the Tensile Bond Strength of Orthodontic Bracket Bases Using Glass Ionomer Cement as an Adhesive
… oral environment has led to experimentation with glass ionomer cements. This study compared the tensile bond strength of eight different orthodontic bracket base designs in vitro and assessed the amount of adhesive remaining on the bracket pad after debonding. Each bracket base design included in …
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Ionic exchanges between glass ionomers and demineralised dentine
Glass-ionomer cement has been used in the Atraumatic Restorative Technique (ART) for stabilisation of carious lesions. The infected layer or fully demineralised dentine is removed by dental hand instruments only and glass-ionomer cement is placed to restore the lesion leaving the affected layer or …
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The Comparison of the Tensile, Shear-Peel, and Torque Orthodontic Bond Strength Test Methods Performed on a Resin and Two Glass Ionomer Cements
… (R), light-cured (LC), and chemically cured (CC) glass ionomer. Sixty-three bovine incisors were randomly divided into three groups. Stainless steel incisor brackets were bonded to the prepared facial surfaces, and the specimens were stored in deionized water at 37° C for 38 hours. The specimens …
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Συγκριτική μελέτη του βαθμού συγκόλλησης μιας κεραμομεταλλικής κονίας με οδοντικούς ιστούς και σύνθετες ρητίνες
BONDING CAPACITY OF GLASS CERMET HAS NOT BEEN EXAMINED YET, IN LABORATORY STUDIES. THE PURPOSE OF THIS IN VITRO INVESTIGATION WAS TO EXAMINE BOND STRENGTHS OFGLASS-CERMET TO ENAMEL, DENTIN AND AUTOPOLYMERIZED COMPOSITE RESINS INTENSILE TEST. THE MATERIALS THAT WERE USED ARE: (A) KETAC-SILVER …
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Volumetric dimensional changes of luting cements
… in the US, is composed of calcium aluminate and glass ionomer. CM is a luting agent indicated for permanent cementation of cast restorations, all-zirconia or all-alumina crowns, and prefabricated metal and cast dowel and cores. The manufacturer claims that the cement has demonstrated favorable …
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Investigation of Silver Enhanced Dental Restorative Materials by the Development of an In Vitro Oral Biofilm Model
… formulations that have been combined with glass ionomer cement. Three out of nine bacterial species considered to be early colonisers (Streptococcus oralis, Streptococcus mutans, & Neisseria subflava) were inoculated at 0.1 OD600 into wells containing sterile glass-ionomer disks. The …
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Oberflächeneigenschaften von Zahnrestaurationsmaterialien
… restorative materials (amalgam, gold, composite, glass ionomer cement, ormocer and compomer). The influence increasing roughness on the surface free energy and the distribution into dispers and polar portions was determined. Metals exhibited lowest values (gold alloy and amalgam). The surface free …
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Fundamental studies on ionomer glasses
… relationships were studied in glasses of the type used to produce glass lonomer dental cements. These materials are currently being developed as a bone cement in joint replacement surgery. Initially, a simple quaternary (25i02-Al203-CaO-CaF2) glass was produced and was found to …
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