Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"Composite resins"”.
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Evaluation of Second Generation Indirect Composite Resins
Indirect composites were introduced so that the composites can be cured extraorally to improve the degree of conversion and other material properties. These materials are indicated as long term full coverage dental restorative materials. However the mechanical and physical properties of new Second …
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Influence of a bleaching agent on stained direct composite resins
… phenomenal strides in research of dental resin composites regarding their physical and mechanical properties, discolouration, either intrinsic or extrinsic still remains a major drawback and is one of the main reasons for the replacement of these restorations. Toothbrushing and polishing …
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Origin and development of internal stresses during polymerization of composite resins
… stresses and arise especially when the adhesive composite materials are cured in a cavity, in which the polymerization contraction is restrained by the cavity walls. During masticatory functioning these residual polymerization stresses elevate the overall stress levels. They exercise a cumulative …
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Colour changes in nano-filled and micro-hybrid composite resins on exposure to spices.
Colour changes in composite resins after immersion in beverages such as coffee, tea, alcohol beverage and carbonated drinks have been reported. Although much work has been done to determine the staining susceptibility of composite resins to various liquid beverages, effects of spices on colour …
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Συγκριτική μελέτη του βαθμού συγκόλλησης μιας κεραμομεταλλικής κονίας με οδοντικούς ιστούς και σύνθετες ρητίνες
… TO ENAMEL, DENTIN AND AUTOPOLYMERIZED COMPOSITE RESINS INTENSILE TEST. THE MATERIALS THAT WERE USED ARE: (A) KETAC-SILVER (GLASS-CERMET), KETAC-FIL (GLASS-IONOMER) ON EVALUATION OF BOND STRENGTH TO DENTAL TISSUES AND (B) KETAC-SILVER, KETAC-BOND (GLASS IONOMER), SILAR (MICROFILLER, …
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Composite versus amalgam: A three-year clinical study in posterior primary teeth
Clinical studies on composite resins in Class II Resotrations place in adults indicate that wear is the predominant problem. However, little has been published on the use of composites for such restorations in primary teeth. The purpose of this study was to compare amalgam to composite resins in …
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Μελέτη στη συγκόλληση διαφόρων σύνθετων ρητινών μεταξύ τους
… FACES THE DILEMMA OF REPLACING OR REPAIRING A COMPOSITE RESIN FILLING. THE PURPOSE OF THIS STUDY WAS TO INVESTIGATE THE BOND STRENGTH, VIA SHEAR FORCES, OF REPAIRED COMPOSITE RESIN. A SMALL PARTICLE, AN HYBRIDE AND TWO MICROFILLED COMPOSITE RESINS WERE USED. CYLINDER SPECIMENS OF THE …
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ΣΥΓΚΡΙΤΙΚΗ ΜΕΛΕΤΗ ΤΟΥ ΕΡΠΥΣΜΟΥ ΜΕΤΑΞΥ ΧΗΜΙΚΩΣ ΠΟΛΥΜΕΡΙΖΟΜΕΝΩΝ ΚΑΙ ΦΩΤΟΠΟΛΥΜΕΡΙΖΟΜΕΝΩΝ ΣΥΝΘΕΤΩΝ ΕΜΦΡΑΚΤΙΚΩΝ ΡΗΤΙΝΩΝ
… CHEMICAL INITIATED AND THREE PHOTO INITIATED COMPOSITE RESINS WAS STUDIED USING A TORTIONAL CREEP APPARATUS IN A STATIC METHOD. THE ABOVE MATERIALS IN PAIRS HAVE THE SAME CHEMICAL COMPOSITION AND FILLER CONTENT AND DIFFER ONLY IN THE MANNER OF POLYMERIZATION. TWENTY FOUR CYLINDRICAL …
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The effect of two bleaching products on microhardness and surface texture of different dental aesthetic restorative materials
… materials were evaluated. <br>Four different composite resins (a hybrid, a flow, a micro-hybrid and a nano-hybrid), an ormocer, and a ceramic, were used and two bleaching agents were tested: hydrogen peroxide 38% and carbamide peroxide 15%. <br>For the first part of the study, where the …
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Evaluation of Tensile Bond Strength of Glass Ionomer Cements for Orthodontic Bonding
… 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 Type …
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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
The purpose of this study was to compare the tensile, shear-peel, and torque bond strength testing methods using a commercially available resin (R), light-cured (LC), and chemically cured (CC) glass ionomer. Sixty-three bovine incisors were randomly divided into three groups. Stainless steel …
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Shear Strengths of Three "One-Step" Self-Etching Dental Bonding Agents
… mounted onto a standardized jig and light cured. Composite stubs of 2.38 mm in diameter and 3 mm high were placed directly on top of the bonding agent using incremental layers of Z250, shade A1 composite.</p> <p>Each sample was paired randomly for testing under two different conditions: …
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In-vitro-Evaluation der Dentinhaftung und Randschlussqualität eines Komposits, eines säuremodifizierten Komposits und eines kunststoffmodifizierten Glasionomerzementes
Qualität, Ästhetik und Langlebigkeit zahnfarbener Restaurationen mit Kompositen, polyacrylsäuremodifizierten Kompositen und kunststoffmodifizierten Glasionomer-materialien sind maßgeblich abhängig von deren Verbund zur Zahnhartsubstanz. Da Komposite selbst keine Haftung zu Schmelz und Dentin …
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Desempenho clínico de diferentes estratégias de adesão de restaurações de lesões cervicais não cariosas
Introdução: O objetivo deste estudo clínico controlado, prospectivo, randomizado e com avaliadores cegos foi avaliar o desempenho clínico de restaurações cervicais não cariosas frente às diferentes estratégias de adesão ao substrato dental. Métodos: foram utilizados um sistema restaurador adesivo …
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ΣΥΓΚΡΙΤΙΚΗ ΜΕΛΕΤΗ ΤΟΥ ΕΡΠΥΣΜΟΥ ΚΑΙ ΤΗΣ ΙΞΩΔΟΕΛΑΣΤΙΚΗΣ ΣΥΜΠΕΡΙΦΟΡΑΣ ΣΥΝΘΕΤΩΝ ΡΗΤΙΝΩΝ ΜΕ ΔΙΑΦΟΡΕΤΙΚΗ ΧΗΜΙΚΗ ΣΥΝΘΕΣΗ ΟΡΓΑΝΙΚΗΣ ΒΑΣΗΣ
ΕΙΝΑΙ ΠΟΛΥ ΓΝΩΣΤΗ Η ΑΠΟ ΤΟ ΧΡΟΝΟ ΕΞΑΡΤΩΜΕΝΗ ΦΥΣΗ ΤΩΝ ΜΗΧΑΝΙΚΩΝ ΙΔΙΟΤΗΤΩΝ ΤΩΝ ΠΟΛΥΜΕΡΩΝ ΥΛΙΚΩΝ. ΟΙ ΜΕΛΕΤΕΣ ΤΗΣ ΙΞΩΔΟΕΛΑΣΤΙΚΟΤΗΤΑΣ ΕΙΝΑΙ ΑΠΑΡΑΙΤΗΤΕΣ ΓΙΑ ΝΑ ΧΑΡΑΚΤΗΡΙΖΟΥΝ ΕΝΑ ΥΛΙΚΑ ΜΗΧΑΝΙΚΑ ΚΑΙ ΔΙΔΟΥΝ ΧΡΗΣΙΜΕΣ ΠΛΗΡΟΦΟΡΙΕΣ ΓΙΑ ΤΗΝ ΜΙΚΡΟΔΟΜΗ ΤΩΝ ΣΥΝΘΕΤΩΝ ΡΗΤΙΝΩΝ. ΜΕΛΕΤΗΘΗΚΕ ΚΑΤΑ ΠΟΣΟ Η ΣΥΝΘΕΣΗ ΤΗΣ …
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The Effect of Root Canal Cleansing on the Retention of Glass Fiber-reinforced Posts
<p>Esthetic glass fiber-reinforced posts are being used more often. The most commonly reported complication associated with these posts is debonding. Dentine conditioning with solutions such as EDTA or MTAD results in removal of smear layer and might improve the retention of posts to root canal …
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Effect of Diamond Bur and Root Canal Irrigants on Retention of Fiber Posts
<p>Esthetic glass fiber-reinforced posts are being used more often. The most commonly reported complication associated with these posts is debonding. Dentine conditioning with solutions such as EDTA or MTAD results in removal of smear layer and might improve the retention of posts to root canal …