Download or read book Effects of Etching Duration on the Surface Roughness Surface Loss Flexural Strength and Shear Bond Strength to a Resin Cement of E max Cad Glass Ceramic written by Hanan Al-Johani and published by . This book was released on 2017 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: EFFECTS OF ETCHING DURATION ON THE SURFACE ROUGHNESS, SURFACE LOSS, FLEXURAL STRENGTH OF E. MAX CAD GLASS CERAMIC AND SHEAR BOND STRENGTH TO A RESIN CEMENT Background: Long-term retention of ceramic restorations is dependent on the bond strength of the luting resin to both the tooth and porcelain substrates. In order to achieve successful bonding, the surface of the porcelain substrate must be modified to increase the surface roughness, and this can be achieved chemically by hydrofluoric (HF) acid etching. However, prolonged HF acid etching has shown to have a weakening effect on the evaluated lithium disilicate glass-ceramics. Therefore, it is essential to quantify the required etching duration of HF acid to minimize the possible deleterious effects on ceramic strength while maximizing the bond strength to tooth structure. Objectives: To evaluate the effects of HF acid etching duration on the surface roughness, surface loss, flexural strength, and shear bond strength of IPS e.max CAD (Ivoclar Vivadent) lithium disilicate-based glass ceramic to a resin cement. Hypothesis: The differences in HF acid etching durations will not have a significant effect on the surface roughness, surface loss, flexural strength, or shear bond strength of IPS e.max CAD to a resin cement. Methods: 168 specimens were prepared from IPS e.max CAD blocks. All specimens were polished and sonically cleaned in distilled water. Specimens were fired in the vacuum pump furnace according to the manufacturer's instructions. Specimens were then divided into 4 groups, according to etching durations, then further divided into 3 subgroups, according to the properties tested. Group A was not etched (control), Groups B, C and D were etched with 5-percent HF acid (IPS Ceramic Etching gel, Ivoclar Vivadent) for 20 s, 60 s and 90 s respectively. The morphologies of both etched and non-etched surfaces in specimens of subgroup 1 of each etching group (n = 16/group) were observed under scanning electron microscopy (SEM). In addition, non-contact surface profilometry (Proscan 2000) was used to calculate the surface loss and to examine the surface roughness of the etched ceramic surfaces and roughness values (Ra, Rq) were documented for each group. Furthermore, etched specimens of subgroup 2 (n = 16/group) were silanated (Monobond Plus, Ivoclar Vivadent) and cemented with a resin cement (Multilink Automix, Ivoclar Vivadent). The shear bond strength (SBS) was measured using a universal mechanical testing machine. For each etching group, subgroup 3 specimens (n = 10/group) were loaded to failure in a three-point bending test to measure their flexural strength values using a universal mechanical testing machine. Data for surface roughness, surface loss, and flexural strength were analyzed using one-way analysis of variance (ANOVA), to identify the significant effects of different HF acid etching durations. Data for shear bond strength test were analyzed using two-way ANOVA to test the effects of etching duration, storage for 24 hours/thermocycling, and their interaction. All pair-wise comparisons from ANOVA analysis were made using Fisher's Protected Least Significant Differences to control the overall significance level at 5 percent. Results: Difference in HF etching durations did not have a significant effect on surface roughness values Ra or Rq (p = 0.3408; p = 0.3245) respectively, but had a significant effect on surface loss (p = 0.0006). SBS values were not significantly different between experimental groups (p = 0.4650); however, SBS values after 24-h storage were significantly higher than that found after thermocycling (p = 0.0166) among different etching durations. Finally, different HF etching durations did not have a significant effect on flexural strength values (p = 0.1260). Conclusion: Within the limitations of this study, different HF etching durations did not have a significant effect on surface roughness, flexural strength, or shear bond strength of IPS e.max CAD. However, the different etching durations significantly affected the surface loss of the lithium disilicate glass ceramics.
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 Aspects of Adhesion Between CAD CAM Ceramics and Resin Cements written by Tian Tian and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Aspects of adhesion between CAD/CAM ceramics and resin cements" by Tian, Tian, 田恬, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Glass ceramics are one of the preferred choices in the case for preservation of tooth structure. They also exhibit excellent aesthetic outcomes, and life-like translucency. Moreover, glass ceramics can provide better adhesion to the underlying tooth preparation, compared with metal-bonded ceramics and oxide ceramics. This is achieved by application of HF etching and silanization, followed by bonding with resin cement. The resin cement is applied as the means to provide a seal, adhesion and 'filler' in the small space that exists between a restoration and prepared tooth. These unique properties have given rise to expanded restoration designs for glass ceramics in comparison to other ceramics, e.g., veneers, inlays or onlays. Hence, durable and stable adhesion is strongly required for the long-term success of these restorations. The aim of this project was to evaluate the durability of adhesion between CAD/CAM ceramics and resin cements as well as the effect of different factors on long-term ceramic adhesion. In the first experiment, two bonding models were compared and contrasted using a microtensile bond strength test. Two surface treatments and two resin cements were also examined. Ceramic to ceramic, as a bonding model, was found to be better than a ceramic to resin composite model. Surface treatments and resin cements had a significant effect on the microtensile bond strength. The second experiment aimed to evaluate the stability of long-term adhesion using six resin luting cements when bonded to three different CAD/CAM ceramics in water over 12 months. According to the outcomes of this study, VITA Suprinity(R) and VITA Enamic(R) demonstrated better long-term adhesion compared to IPS e.max(R) CAD. Furthermore, the microtensile bond strengths of ceramic and resin cement decreased up to 3 months but thereafter became relatively stable. Different resin cements showed different bonding behaviour during prolonged storage time. The third study examined the effect of two etching times on long-term ceramic adhesion and the effect of six resin luting cements on durability of adhesion. This study indicated that prolonged etching time could increase the microtensile bond strength of glass ceramics in the short-term, however, different etching times did not have an obvious influence on the long-term adhesion. In the fourth experiment, an evaluation of sorption, solubility and dimensional change of six resin luting cements immersed in various storage media was undertaken. Significant differences were observed in the sorption, solubility and dimensional change of the cements when exposed to the different storage media over time. The objective of the last experiment was to evaluate the effect of immersion time and media on fracture toughness of six resin cements. It was concluded that fracture toughness varied among the cements and the value decreased over time. Furthermore, the three storage media evaluated in this study seemed to not have had a significant effect on the fracture toughness. It was concluded that, in general, lower sorption, solubility and dimensional change in resin cements seems to produce a higher fracture toughness and microtensile bond strength to glass ceramics. Subjects: Dental resins CAD/CAM systems Dental ceramics
Download or read book Dental Materials and Their Selection written by William Joseph O'Brien and published by Quintessence Publishing (IL). This book was released on 1997 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1. A Comparison of Metals, Ceramics, and Polymers. -- 2. Physical Properties. -- 3. Color and Appearance. -- 4. Surface Phenomena and Adhesion to Tooth Structure. -- 5. Gypsum Products. -- 6. Polymers and Polymerizations: Denture Base Polymers. -- 7. Polymeric Restorative Materials: Composites and Sealants. -- 8. Abrasion, Polishing, and Bleaching. -- 9. Impression Materials. -- 10. Waxes. -- 11. Dental Cements. -- 12. Structure and Properties of Metals and Alloys. -- 13. Dental Amalgams. -- 14. Direct Gold Filling Materials. -- 15. Precious Metal Casting Alloys. -- 16. Alloys for Porcelain-Fused-to-Metal Restorations. -- 17. Casting. -- 18. High-Temperature Investments. -- 19. Base Metal Casting Alloys. -- 20. Orthodontic Wires. -- 21. Dental Porcelain. -- 22. Soldering, Welding, and Electroplating. -- 23. Dental Implant Materials.
Download or read book Shear Bond Strength of Resin Cements to a Densely Sintered AL2O3 Ceramic Material written by Wedad Yassin Awliya and published by . This book was released on 1996 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Glasses and Glass Ceramics for Medical Applications written by Emad El-Meliegy and published by Springer Science & Business Media. This book was released on 2011-12-02 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glass ceramics are a special group of materials in which a base glass can be crystallized under carefully controlled conditions, which in turn determine the properties of the material. These materials offer a wide range of physical and mechanical properties combining the distinctive characteristics of sintered ceramics and glasses. This book provides readers with an interest in medical ceramics with the ability to start making their own glasses and glass ceramics, together with an understanding of the various factors that control the final properties of these medical and dental materials. In addition, the authors describe various industrial problems with current, clinically-used medical glass ceramics and discuss appropriate scientific solutions. Glasses and Glass Ceramics for Medical Applications will appeal to a broad audience of biomaterials scientists, ceramists, and bioengineers, particularly those with an interest in orthopedic and dental applications, as well as scientists and engineers involved in the manufacture of glasses, glazes, enamels, and other glass coatings for the medical materials industry. The book will also be of interest to undergraduate and graduate students in materials engineering and dentistry, and is suitable for use in courses on medical and dental materials.
Download or read book Etching Time Effects on the Bond Strength of Three Adhesive Systems written by Hung D. Pham and published by . This book was released on 2002 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adhesion written by Jean-François Roulet and published by Quintessence Publishing (IL). This book was released on 2000 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adhesives: Principles and State of the Art. -- Adhesives: Dos and Don'ts. -- Restorative Materials for the Direct Technique. -- The Key for the Indirect. -Technique. - New Concepts of Minimally Invasive Preparations: An SI/STA Concept. --Preparation and Restoration of Small Interproximal Carious Lesions. -- Adhesion in Preventive Dentistry. -- Adhesion in Pediatric Dentistry. --Strength of Fragment-Bonded Teeth. -- Bonding: The Ultimate Restoration for Tooth Fracture? -- Biological Bonding: Periodontal and Peri-Implant Attachment. -- Exploring the Layering Concepts for Anterior Teeth. -- Composite Resin. --Restorations on Posterior Teeth. -- Prosthodontics of the Future: Cementing or Bonding? -- Clinical Application of Ceramic Bonded Restorations. -- Restoration of the Endodontically Treated Tooth: Adhesion vs. Mechanical Retentio.
Download or read book Effect of Surface Preparation on Resin to Enamel Shear Bond Strength with Self etching Adhesive Systems written by Raed F. Al Ajlouni and published by . This book was released on 2002 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Esthetic Oral Rehabilitation with Veneers written by Richard D. Trushkowsky and published by Springer Nature. This book was released on 2020-04-16 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book acquaints the clinician with the full range of parameters that need to be considered before undertaking an esthetic rehabilitation with veneers and describes current clinical concepts and techniques. The initial chapters provide the foundation for a comprehensive treatment plan. It is explained how digital smile design in conjunction with a wax-up and functional esthetic prototype allow a patient to visualize the possibilities. Occlusion prior to the initiation of treatment and following treatment is key to the longevity of restorations, and this aspect is given careful consideration. Detailed advice is also offered on proper selection of materials and their placement. The guidance provided will ensure that the reader is fully equipped to gather and assess all relevant information prior to commencement of the final treatment. The treatment itself can range from minimally invasive to more complex depending on the requirements of each individual case. Among the clinical concepts discussed in the book are the use of etched porcelain restorations, minimally invasive CAD/CAM veneers, and the ink glue technique.
Download or read book A Textbook of Fixed Prosthodontics written by Stig Karlsson and published by . This book was released on 2000 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bonding to Ceramics written by Alvaro Della Bona and published by . This book was released on 2009 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bonding to Ceramics provides students, researchers and clinicians with detailed knowledge of ceramic structures, adhesion mechanisms, quality research design, material selection and clinical performance of dental ceramics. Based on collaborative research efforts and evidence-based clinical data, this book describes the basic properties of ceramics and the applications, failures and limitations of this material. The book features 500 clinical images, many of them in 3D, to aid the understanding of: ceramic microstructures; the basic principles and properties of ceramics; clinical applications and causes of failure. It also discusses the development of experiments to test ceramic designs, how to select the appropriate material according to the specific clinical application, as well as evidence regarding adhesive mechanisms for bonding ceramic restorations. Through examining clinical failures, the book also aims to improve clinical performance through the suggestion of improved materials, structures and designs. The ultimate aim of this book therefore is to provide the reader with the knowledge to be able to select the appropriate ceramic material and bonding technique for each clinical application.
Download or read book The Glossary of Prosthodontic Terms written by and published by . This book was released on 1994 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fractography of Glasses and Ceramics VI written by James R. Varner and published by John Wiley & Sons. This book was released on 2012-07-09 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides an excellent one-stop resource for understanding the most important current issues in the research and applications of fractography of glasses and ceramics.
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
Download or read book Protocols for Predictable Aesthetic Dental Restorations written by Irfan Ahmad and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aesthetic dentistry has become increasingly important to dentists and their patients. This book is designed as a springboard to assist clinicians in developing the aesthetic potential of restorative procedures. The book marries evidence-based principles with handy hints and tips the author has distilled from years of clinical experience. This combination of scientific principles with ‘real world’ practice will boost the confidence of budding aesthetic practitioners and clinical dental students. The book focuses on the principles of aesthetic work across the dentist's repertoire, rather than concentrating on one particular technique. For this reason, it will add value to the range of daily restorative work in the dental surgery.
Download or read book Restorative Dental Materials written by Robert George Craig and published by Elsevier España. This book was released on 1997 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text provides treatment of dental materials, giving students fundamental information needed to understand the laboratory and clinical properties of the materials. The scientific base for the technical procedures and manipulation of materials is provided as well as the background required for discriminating selection of materials for dental practice. Selected problems are featured at the end of each chapter to help the student to apply the information to practical situations.
