Download or read book Evaluation of Shear Bond Strength of Current Adhesive Resin Luting Agents Used to Bond Leucite reinforced Glass Ceramic to Human Enamel and Dentin in Vitro Study written by Sunhong Hwang and published by . This book was released on 2001 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flexural Strength and Shear Bond Strength of Self etching self adhesive Resin Luting Agents written by Richard Scott Adcook and published by . This book was released on 2009 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traditional resin luting agents generally have mechanical properties that are superior to the newer so-called "universal" self-etching/self-adhesive resin luting agents. However, recent reports indicate that some properties of these new luting agents have been improved, approaching those of the traditional etch and rinse resin luting agents. The objective of this study was to test some mechanical properties of four of these self-etching/self-adhesive resin luting agents [Maxcem Elite (ME), Multilink Automix (MA), RelyX Unicem (RU), SmartCem 2 (SC)] and compare them to a traditional etch and rinse resin luting agent [RelyX ARC (RA)] and a resin-modified glass ionomer luting cement [Fuji Plus (FP)], both of which have much longer histories of clinical success. By comparing the properties of the newer cements to the standards, it may be possible to determine how clinically successful the newer cements may be. The mechanical properties tested were flexural strength (FS) and shear bond strength (SBS). The FS test included making beams of each material, storing them in water for periods of time (24 hours and 90 days) and then performing a three-point bending test on a universal testing machine. The 90 day groups were thermocycled. The SBS test involved preparing human molar specimens, making flat dentin surfaces. Composite cylinders were fabricated, luted to the dentin surfaces with each of the materials tested, stored in water for periods of time (24 hours or 90 days), and then a knife edge shear test was performed on a universal testing machine. The 90 day groups were thermocycled. A Weibull-distribution survival analysis was performed. The results revealed significant differences in the FS of all materials tested at 24 hours. After 90 days and thermocycling, only SC and RA were not significantly different. At both time periods, FP had the lowest and MA the highest FS. The SBS results showed MA, RA, and RU to have the highest bond strengths; SC and ME the lowest at 24 hours. After 90 days and thermocycling, RA had significantly higher bond strength than all other groups; ME, FP and SC had the lowest. The self-etching/self-adhesive resin luting agents all performed at least as well as FP, with the exception of SC (SBS 24 hour). They did not all perform as well as RA, with the exception of SC (FS 90 day), MA (SBS 24 hour, FS 24 hour and 90 day), and RU (SBS 24 hour). The newer luting agents should expect to have clinical success, regarding flexural strength and shear bond strength, at least as good as resin-modified glass ionomer luting cements and approach the level of traditional etch and rinse resin luting agents.
Download or read book Adhesive Metal free Restorations written by Didier Dietschi and published by Elsevier España. This book was released on 1997 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work offers a simple yet comprehensive approach to the aesthetic adhesive restoration of posterior teeth. the direct, semidirect and indirect techniques, as well as luting and finishing procedures, are covered in detail.
Download or read book Bond Strength Evaluation of Three Different Generation of Adhesives written by Huma Iftekhar and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The widespread demand for, and use of dental adhesives has fueled an intense development of better and easier dental adhesives in rapid succession and dentists have literally been inundated with successive "generations" of adhesive materials. The "generational" definitions help in identification of chemistries involved, the strength of dentinal bond and the ease of use for the practitioner.The clinical use of resin composites has expanded considerably over the past few years due to increased esthetic demands by patients, new improved formulations and simplification of bonding procedures. Evaluation of bond strength provides a screening mechanism use of adhesives and an indication of the potential for their clinical success.the purpose of this study was to find and compare the shear bond strength of three different generation of adhesive systems fifth, sixth and seventh to dentin of human molars using same composite.
Download or read book EFFECTIVENESS OF UNIVERSAL ADHESIVE BONDING AGENTS ON THE SHEAR BOND STRENGTH TO LITHIUM DISILICATE CERAMICS written by Mohammed AlRabiah and published by . This book was released on 2016 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: Background: All-ceramic restorations have excellent esthetic outcomes compared with other restorative materials. Lithium disilicate is classified as one of many silica-based all-ceramic materials. Currently, companies have provided single-step adhesives, known as universal adhesives, compatible with different restorative materials including lithium disilicate. Many studies have reported greater bond strengths when using a silane to treat the lithium disilicate before applying the bonding agent. Moreover, few studies were published comparing the bond strength when using the universal adhesive alone. Purpose: The objective of this study was to evaluate and compare shear bond strength of three universal adhesives to lithium disilicate ceramic restorative material. Materials and Methods: Three universal adhesive bonding agents were selected from commercially available adhesives. 408 IPS e.max CAD ceramic discs were processed, fired, and etched for 20s. The specimens were divided into six groups. The first three groups used the universal adhesive directly. The remaining three groups were treated with silane. Then, a composite resin cylinder was placed on top of the adhesive using a bonding jig. Each group was subdivided into four equal subgroups (n = 17), subjected to different aging simulation procedures: 24 h, one month with 5000 thermocycles, two months with 5000 cycles, and three months with 5000 cycles. Then, specimens were debonded using shear force by a universal testing machine (MTS). Results: Shear bond strength was greater with silane than without silane (p
Download or read book Bioceramics written by Joon Park and published by Springer Science & Business Media. This book was released on 2009-03-02 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioceramics: Properties, Characterization, and Applications will be a general introduction to the uses of ceramics and glasses in the human body for the purposes of aiding, healing, correcting deformities, and restoring lost function. With over 30 years experience, the author developed the text as an outgrowth of an undergraduate course for senior students in biomedical engineering and will emphasize the fundamentals and applications in modern implant fabrication, and will also deal with tissue engineering scaffolds made of ceramics. Organized as a textbook for the student needing to acquire the core competencies, it will meet the demands of advanced undergraduate or graduate coursework in bioceramics, biomaterials, biomedical engineering, and biophysics.
Download or read book Assessment of the Bond Strength Between Resin Cement and Lithium Disilicate Based Glass Ceramics with Different Chemical Composition and Surface Treatments written by Muna Jr Bebsh and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objective: The purpose of this research project is to evaluate and compare the effect of different surface treatments on surface properties. Also the effect of different surface treatments with silane coupling agents on the bond strengths between resin cement and four CAD/CAM lithium disilicate-based glass ceramics (LDGC). Materials and methods: This study had three levels of analyses. Part I: The physicochemical analyses of four CAD/CAM LDGC surfaces. The surface physicochemical compositions of the four LDGC products (e.max CAD, Vita Suprinity, Celtra Duo, n!ce) were analyzed using X-ray photoelectron spectroscopy (XPS). In addition, scanning electron microscopy (SEM) was used to analyze the microstructure of LDGC. Part II: The effect of different surface treatments on the micromorphology and the roughness of four CAD/CAM lithium disilicate- based glass ceramics Atomic force microscopy (AFM) was used to measure the surface roughness and scanning electron microscopy (SEM) was used to analyze the changes in the surface micromorphology. Part III: The effect of an experimental silane coupling agent (TEOS) with different surface treatments on bond strength of four CAD /CAM lithium disilicate-based glass-ceramics. The shear bond strength between the ceramic surface and resin cement was tested using shear bond testing after a 30 day storage in distilled water. Results: The chemical composition percentage on the nano surfaces of the LGGC changed after hydrofluoric acid treatment. Different surface treatments produced different values of roughness. The highest shear bond strength values were found with the use of hydrofluoric acid treatment and the combination of both hydrofluoric acid and sandblasting followed by manufacturer's recommendation of silane coupling application. Conclusion: Surface treatments and silane coupling agents play a significant role to obtain reliable bond strengths between resin cement and LDGC restorations.
Download or read book Bond Strength Studies of a Self adhesive Luting Cement Used with a Polyglass Material written by Riyaz Rahbeeni and published by . This book was released on 2004 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study is to test the shear and tensile bond strengths and adhesive failure modes of a self-adhesive luting resin in the bonding of a polyglass material by comparing it to other classes of resin luting cements and their bonding protocols.
Download or read book Silane Coupling Agents written by Edwin P. Plueddemann and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: * It has been rumored that a bumble bee has such aerodynamic deficiencies that it should be incapable of flight. Fiberglass-reinforced polymer com posites, similarly, have two (apparently) insurmountable obstacles to per formance: 1) Water can hydrolyze any conceivable bond between organic and inorganic phase, and 2) Stresses across the interface during temperature cycling (resulting from a mismatch in thermal expansion coefficients) may exceed the strength of one of the phases. Organofunctional silanes are hybrid organic-inorganic compounds that are used as coupling agents across the organic-inorganic interface to help overcome these two obstacles to composite performance. One of their functions is to use the hydrolytic action of water under equilibrium condi tions to relieve thermally induced stresses across the interface. If equilib rium conditions can be maintained, the two problems act to cancel each other out. Coupling agents are defined primarily as materials that improve the practical adhesive bond of polymer to mineral. This may involve an increase in true adhesion, but it may also involve improved wetting, rheology, and other handling properties. The coupling agent may also modify the inter phase region to strengthen the organic and inorganic boundary layers.
Download or read book Textbook of Operative Dentistry written by Nisha Garg and published by Boydell & Brewer Ltd. This book was released on 2010-08 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition is a complete guide to operative dentistry. Beginning with an introduction, physiology, dental caries and tooth preparation, the text also discusses pain and infection control. The following sections examine different operative procedures. New techniques such as minimal intervention dentistry, nanotechnology and lasers; and advances in dental materials are discussed in detail. More than 1200 colour images, illustrations, flow charts and tables are included. Key points Complete guide to operative dentistry Discusses numerous different procedures, and pain and infection control New techniques and advances in materials described in detail More than 1200 colour images, illustrations, flow charts and tables Previous edition published in 2010
Download or read book Principles in Contemporary Orthodontics written by Silvano Naretto and published by BoD – Books on Demand. This book was released on 2011-11-25 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: Orthodontics is a fast developing science as well as the field of medicine in general. The attempt of this book is to propose new possibilities and new ways of thinking about Orthodontics beside the ones presented in established and outstanding publications available elsewhere. Some of the presented chapters transmit basic information, other clinical experiences and further offer even a window to the future. In the hands of the reader this book could provide an useful tool for the exploration of the application of information, knowledge and belief to some orthodontic topics and questions.
Download or read book Evaluation of Shear Bond Strength of Resin Modified Glass Ionomer Cement and Enamel Surface Condition with Different Surface Preparation in Vitro Study written by Ayman Anaam Saied El Nafar and published by . This book was released on 2013 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Shear Bond Strength Microleakage and SEM Study of New one Bottle Dentin Adhesive Resin Materials written by Ali A. Al-Eheideb and published by . This book was released on 1997 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Different Surface Treatments on the Shear Bond Strength of Lithium Disilicate Ceramic written by Mai Almujel and published by . This book was released on 2013 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Statement of problem: During clinical try-in, it is almost inevitable that the fitting surfaces of a lithium disilicate ceramic fixed prosthesis be contaminated with saliva and silicone disclosing medium. Purpose: This in vitro study used a shear bond strength (SBS) test to evaluate the effect of saliva and silicone disclosing medium contamination on the adhesive luting material bond to porcelain, and the effectiveness of various materials used to remove such contamination. Hypothesis: The resin-ceramic bond strength and its durability are related to ceramic surface contamination and subsequent surface treatment. Material and methods: Ninety ceramic specimens were milled from lithium disilicate blocks using an electrical high precision saw, crystallized, and then randomly assigned into six groups (n=15). Excluding the control group, each group underwent contamination with saliva and silicon disclosing medium, then received a different surface cleaning treatment. After bonding and thermocycling, shear bond strength values were measured on an Instron machine. Fracture modes were determined by examination with a scanning electron microscope. Results: Salivary contamination of porcelain surfaces significantly reduced the resin cement-to-porcelain bond compared to the control (P
Download or read book An in Vitro Shear Bond Strength Study of Enamel dentin Bonding Systems on Enamel written by Paul Eric Reifeis and published by . This book was released on 1997 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparison of Shear Bond Strength of Self Adhesive Resin Cements to Enamel and Dentin in the Dual Cure and Self Cure Modes written by Rashmi Radhakrishnan and published by . This book was released on 2018 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: All specimens were subjected to shear forces by a universal testing machine after 24hrs at a cross head speed of 1mm/min. Data were analyzed with Kruskal Wallis and Wilcoxon test to compare groups (¿=0.05). Results: Results showed SBS of RelyX Ultimate to be significantly greater than the 3 self-adhesive resin cements on both enamel and dentin in the dual cure mode as well as on enamel in the self-cure mode. However, Panavia SA and Speedcem were significantly greater than Rely X Ultimate in the self-cure mode on dentin. Dual cure activator improved the shear bond strength of RelyX Ultimate in the self-cure mode and no significant differences were found between the bond strengths of self-adhesive resin cements and RelyX Ultimate on dentin in the self-cure mode. Conclusions: For dentin, self-adhesive resin cements Panavia SA and Speedcem had better bond strength compared to RelyX Ultimate in the absence of light polymerization and therefore may be considered in cementing restorations such as zirconia and metal, where light transmission may be limited.
Download or read book Basic Dental Materials written by John J Manappallil and published by JP Medical Ltd. This book was released on 2015-11-30 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: Basic Dental Materials is the new edition of this extensive guide to materials used in dentistry. The book has been entirely reorganised, with substantial revisions in each chapter incorporating the latest developments and research findings, and new colour illustrations have been added. This book is divided into seven sections, the first covering the structure and properties of dental materials, including electrochemical and biological properties. Further sections cover specific groups of materials, including direct restorative materials, endodontic materials (new to this edition), impression materials, materials and processes in the dental laboratory, alloys, and indirect restorative and prosthetic materials. The chapter on dental ceramics in the final section is entirely revised to reflect the significant advances in this technology since the previous edition. Basic Dental Materials provides a practical approach to the selection and use of modern dental materials, with guidance on preparation for indirect restorations such as crowns, bridges and inlays. Enhanced by 645 images and illustrations, this comprehensive book will bring the knowledge of dental students and practising students firmly up to date. Key Points Latest edition of this extensive, illustrated guide to basic dental materials Previous edition published 2010 (9788184489217) Entirely reorganised, with a new section on endodontic materials, and chapter revisions reflecting recent advances in the field 645 images and illustrations, the majority in full colour
