Water Sorption And Resin Hydrophilicity Of Dentin Bonding Agents
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Water Sorption And Resin Hydrophilicity Of Dentin Bonding Agents
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Author : Prashanth Kumar Dhanpal
language : en
Publisher: Open Dissertation Press
Release Date : 2017-01-27
Water Sorption And Resin Hydrophilicity Of Dentin Bonding Agents written by Prashanth Kumar Dhanpal and has been published by Open Dissertation Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-01-27 with categories.
This dissertation, "Water Sorption and Resin Hydrophilicity of Dentin Bonding Agents" by Prashanth Kumar, Dhanpal, 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. DOI: 10.5353/th_b3983950 Subjects: Dental resins Dental adhesives Dental materials - Testing
Fluid Transport Across Bonded Dentin Interfaces
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Author : Kar-Yung Cynthia Yiu
language : en
Publisher: Open Dissertation Press
Release Date : 2017-01-27
Fluid Transport Across Bonded Dentin Interfaces written by Kar-Yung Cynthia Yiu and has been published by Open Dissertation Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-01-27 with categories.
This dissertation, "Fluid Transport Across Bonded Dentin Interfaces" by Kar-yung, Cynthia, Yiu, 姚嘉榕, 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: Abstract of thesis entitled Fluid Transport Across Bonded Dentin Interfaces Submitted by Cynthia Kar Yung YIU for the degree of Doctor of Philosophy at The University of Hong Kong May 2006 Knowledge of fluid transport across dentin bonded interfaces which can adversely affect the integrity of bonded restorations is incomplete. Initially, effects of resin hydrophilicity on silver penetration, water-vapour permeability, water sorption and UTS after aging of copolymer blends with increasing hydrophilicity were studied. Permeability of polymerized resin beams after immersion in ammoniacal silver nitrate was examined using TEM. Weight loss from a water-filled Fisher permeability cup through polymerized resin films was evaluated. Water sorption characteristics of polymerized resin disks were measured before and after water immersion and desiccation. UTS of polymerized resin blocks was determined after water or oil aging. Adhesive-solvent mixtures, prepared by addition of solvent to copolymer blends, were weighed before and after solvent evaporation. Silver penetration revealed water trees and silver grains in hydrophilic copolymer blends. Cumulative water loss, maximum water sorption, UTS reduction and solvent retention in adhesive-solvent mixtures, increased with hydrophilicity of copolymer blends. Hydrophilic resins used in simplified dentin adhesives are permeable, and permit water transportation across bonded interfaces. Secondly, fluid transport across resin-dentin interfaces was addressed. Nanoleakage across bonded dentin can be reduced using NaOCl to remove unprotected collagen before bonding. However, compromised bond strengths occur with some single-bottle total-etch adhesives when applied to NaOCl-treated dentin. Hence, the relationship between nanoleakage and reversal of compromised bonding was examined. Composite-dentin beams (0.9mm x 0.9mm) made from NaOCl-treated, acid-etched human dentin, bonded with single-bottle total-etch adhesives, were subjected to μTBS testing and nanoleakage evaluation using TEM. After NaOCl application, reticular nanoleakage in hybrid layers was replaced by vertical, shag-carpet-like patterns. Treatment with sodium ascorbate eliminated this nanoleakage. Residual NaOCl within porosities of mineralized dentin may compromise polymerization and bond strength. Oxalate desensitizers applied on acid-etched dentin prior to adhesive application can reduce fluid movement across bonded interfaces. However, solubility of calcium oxalate increases in acidic solution. Thus, the acidity of simplified etch-and-rinse adhesives bonded to desensitizer-treated acid-etched dentin was evaluated. Composite-dentin beams (0.9mm x 0.9mm) from acid-etched human dentin treated with oxalate desensitizers and bonded with simplified etch-and-rinse adhesives, were subjected to μTBS testing. Hydraulic conductance of bonded dentin was measured at 20cm of water pressure. Ultrastructure of composite-dentin beams were examined using SEM and TEM. Convective water flux reduction and bonding efficacy are adhesive specific and inapplicable to low acidity adhesives due to formation of globular structures along bonded interfaces. Finally, SEM, FE-ESEM and TEM were used to study the ultrastructure of GIC and RMGIC bonded dentin interfaces. Dentin surfaces from extracted third molars, bonded with auto-cured GIC and RMGIC, w
Dentin Bonding Agents
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Author : DR. DAMINI PATIL
language : en
Publisher: Blue Rose Publishers
Release Date : 2022-11-26
Dentin Bonding Agents written by DR. DAMINI PATIL and has been published by Blue Rose Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-11-26 with Education categories.
During the last two decades, adhesive restorative dentistry has increasingly proven its tremendous clinical potential, first in the anterior and more recently in the posterior segments of the mouth. Adhesive techniques have greatly expanded the horizon of aesthetic dentistry. Correction of shapes, positions, dimensions and shades of teeth are now possible with the restorative materials. Repair of fractured teeth can be carried out using the fractured tooth fragments there by maintaining original aesthetics.The continued developments of adhesive materials are now focused on gaining a better understanding of factors affecting adhesion in the oral environment to improve the clinical longevity of restorative materials.
Aspects Of Solvents In Dentine Bonding
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Author : Manikandan Ekambaram
language : en
Publisher:
Release Date : 2017-01-27
Aspects Of Solvents In Dentine Bonding written by Manikandan Ekambaram and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-01-27 with categories.
This dissertation, "Aspects of Solvents in Dentine Bonding" by Manikandan, Ekambaram, 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: Degradation starts at the resin-dentine bonded interfaces within a few months' of bonding. There are two major causes of degradation of the bonded interfaces over time. The simplified dental adhesives that are routinely used in the contemporary clinical dental practice are extremely hydrophilic and are prone to water sorption, leading to hydrolytic degradation. Dentine matrix-bound metalloproteinases (MMPs) and cysteine cathepsins (CCs) are proteolytic enzymes that have been shown to degrade the uninfiltrated demineralized collagen at the bottom of the hybrid layer. Ethanol-wet bonding (EWB) with hydrophobic adhesive has been proven to improve the longevity of resin-dentine bonds in vitro. Chlorhexidine (CHX) treatment of demineralized dentine before bonding with adhesive resin has been shown to preserve resin-dentine bond durability in vivo and in vitro by inhibition of dentine matrixbound MMPs and CCs. However, it is not known whether simultaneous application of CHX and EWB would have any interactional effect on stability of resin-dentine bonds. 1-Ethyl-3-[3-dimethylaminopropyl] carbodiimide hydrochloride (EDC), both a dentine collagen cross-linker and a MMP inhibitor, has been shown to preserve dentine bond durability in vitro. However, both EDC and CHX are prepared in aqueous solutions using water as a solvent for application. The MMPs are hydrolases and the presence of residual water in the demineralized dentine following EDC and CHX applications will enhance dentine bond degradation. The general aims of this thesis were to investigate the effects of solvents in resindentine bonding, in particular the role of solvents in the enhancement of resin-dentine bond durability. In the earlier part of this thesis, the adjunctive application of 2% CHX with EWB using the simplified dehydration protocol for 60 s was examined as a bonding strategy to preserve dentine bond durability to sound and caries-affected dentine. The adjunctive application of EWB and CHX preserved bond durability of hydrophobic adhesive to both sound and caries-affected dentine after 12 months' ageing. The same bonding strategy was applied to preserve the bond durability of luting fibre post to radicular dentine. However, the addition of 2% CHX to EWB did not further improve bond durability of hydrophobic adhesive to radicular dentine, when compared to EWB alone. In the later part of this thesis, the role of the solvents (commonly used in commercial dentine adhesives) in the enhancement of dentine bond preservation potential by CHX and EDC were assessed. The incorporation of 2% CHX in ethanol showed greater inhibitory effect on matrix-bound proteases than 2% CHX in water. Conversely, the use of acetone as a solvent for EDC also enhanced its dentine collagen cross-linking potential. The dentine collagen cross-linked by EDC in acetone was more resistant to enzymatic degradation. Within the limitations of this thesis, it could be concluded that solvents play a significant role in the enhancement of dentine bond durability. In general, ethanol and acetone are better than water for the preservation of dentine bond durability. DOI: 10.5353/th_b5387969 Subjects: Dental bonding Dentin
Fiber Posts And Endodontically Treated Teeth
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Author : Marco Ferrari
language : en
Publisher: MODERN DENTISTRY MEDIA
Release Date : 2008
Fiber Posts And Endodontically Treated Teeth written by Marco Ferrari and has been published by MODERN DENTISTRY MEDIA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Crowns (Dentistry) categories.
Adhesion Aspects In Dentistry
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Author : Jukka P. Matinlinna
language : en
Publisher: BRILL
Release Date : 2009-09-30
Adhesion Aspects In Dentistry written by Jukka P. Matinlinna and has been published by BRILL this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-09-30 with Science categories.
Modern adhesive dentistry has numerous applications in cariology, as well as in aesthetic and pediatric dentistry, prosthodontics, implantology, and orthodontics-in essence, in comprehensive dental care. This unique book addresses various ramifications of adhesion and adhesives in the broad domain of dentistry. The topics covered include testing aspects of dental materials, dentin bonding, restorations, and adhesion promotion. This book reflects the cumulative wisdom of many world-renowned researchers and provides a useful reference to anyone involved in the various aspects of dentistry.
Material Tissue Interfacial Phenomena
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Author : Paulette Spencer
language : en
Publisher: Woodhead Publishing
Release Date : 2016-09-30
Material Tissue Interfacial Phenomena written by Paulette Spencer and has been published by Woodhead Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-09-30 with Medical categories.
Material-Tissue Interfacial Phenomena: Contributions from Dental and Craniofacial Reconstructions explores the material/tissue interfacial phenomena using dental and craniofacial reconstructions as a model system. As the mouth is a particularly caustic environment, the synthetic and/or bio-enabled materials used to repair damaged tissues and restore form, function, and esthetics to oral structures must resist a variety of physical, chemical, and mechanical challenges. These challenges are magnified at the interface between dissimilar structures such as the tooth/material interface. Interfacial reactions at the atomic, molecular, and nano-scales initiate the failure of materials used to repair, restore, and reconstruct dental and craniofacial tissues. Understanding the phenomena that lead to failure at the interface between dissimilar structures, such as synthetic materials and biologic tissues, is confounded by a variety of factors that are thoroughly discussed in this comprehensive book. Provides a specific focus on the oral environment Combines clinical views and basic science into a useful reference book Presents comprehensive coverage of material-interfacial phenomena within the oral environment
Dental Hard Tissues And Bonding
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Author : George Eliades
language : en
Publisher: Springer Science & Business Media
Release Date : 2005-12-06
Dental Hard Tissues And Bonding written by George Eliades and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-12-06 with Medical categories.
This book comprehensively reviews bonding to enamel, dentin and cementum and analyses relevant adhesion mechanisms. It is addressed to both the dental researcher and the clinician. Emphasis is placed on the characterization of material interfaces with dental tissues in situ. The volume also stresses the importance of appropriate experimental protocol design in facilitating clinically-relevant research methods, clarifies the mechanisms of adhesion of polymeric materials to hard dental tissues and furnishes a handy reference for routine clinical procedures in restorative and prosthetic dentistry as well as orthodontics. The book introduces important aspects of the chemistry of dental materials and their adaptation to dental hard tissues. It also analyses interfacial phenomena occurring during application of materials, including mechanical properties, and structural-compositional alterations. The text presents the current instrumental approaches in studying related issues and a summary of the current status of theories concerning bonding to dental tissues. This work, in its scope and scientific content, provides an in-depth view of the way in which aesthetic dentistry is currently being practiced.
Adhesives
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Author : Anna Rudawska
language : en
Publisher: BoD – Books on Demand
Release Date : 2016-11-23
Adhesives written by Anna Rudawska and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-11-23 with Science categories.
This book presents some information regarding adhesives which have applications in industry, medicine and dentistry. The book is divided into two parts: "Adhesives Applications in Medicine and Dentistry" and "Properties of Adhesive." The aim of such a presentation is to present the usage in very different aspects of application of the adhesives and present specific properties of adhesives. Adhesives' advantageous properties and relatively uncomplicated processing methods contribute to their increasing application and their growing popularity in the industry, medicine and other branches. Some adhesives represent properties superior to those of most adhesive materials, due to their excellent adhesion and chemical resistance. A wide variety of adhesives' considerable flexibility in modification of properties of adhesives allows adjusting the composition to particular applications.
Essentials Of Operative Dentistry
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Author : I Anand Sherwood
language : en
Publisher: Boydell & Brewer Ltd
Release Date : 2010-09-17
Essentials Of Operative Dentistry written by I Anand Sherwood and has been published by Boydell & Brewer Ltd this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-09-17 with Medical categories.
This book contains nearly 1200 illustrations that explain the basics and nuances of operative dentistry, enabling trainees to easily grasp key essential concepts. Through a unique management options section it guides students through the various instruments required for clinical practice. A DVD demonstrating some of the practical aspects of Operative Dentistry is included.