Some Surface Treatments For Improving The Durability Of Zirconia Based Restorations

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Some Surface Treatments for Improving the Durability of Zirconia-Based Restorations

Author : Dan Liu
Publisher :
ISBN 13 : 9781361353905
Total Pages : pages
Book Rating : 4.3/5 (539 download)

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Book Synopsis Some Surface Treatments for Improving the Durability of Zirconia-Based Restorations by : Dan Liu

Download or read book Some Surface Treatments for Improving the Durability of Zirconia-Based Restorations written by Dan Liu and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Some Surface Treatments for Improving the Durability of Zirconia-based Restorations" by Dan, Liu, 刘丹, 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: Zirconia has now been increasingly used in modern dental prosthetic practice due to its high mechanical strength, good esthetics, and excellent biocompatibility. However, the application of zirconia-based dental restorations is still constrained by its chemical inertness and the resultant relatively weak bonding properties, including porcelain to zirconia bonding, and resin to zirconia bonding. Therefore, many investigations have been carried out on the development of an effective method of surface modification on zirconia for improving its bonding ability. The aim of this laboratory study was to evaluate the effects of some new modified surface treatments on the adhesion durability of dental zirconia prosthetic system. In Part I and Part II, the application of laser surface treatment was examined. Laser energy was utilized and applied on zirconia surface before porcelain veneering procedure. Its influence on porcelain zirconia integration interface was mechanically tested and compared with sandblasting treatment. The changes in porcelain zirconia shear bond strength and mechanical strength values of zirconia with the modulation of output energy were recorded. In Part III and Part IV, several types of coating treatment, such as tribochemical approach, silica powder coating, and zirconium silicate coating, were compared with their effects on resin zirconia bonding. The changes in resin zirconia shear bond strength under different aging conditions were observed. The elemental analysis was also performed for clarifying the chemical composition of zirconia surface. The application of laser produced a flake-like micro-retentive structure on zirconia surface. Laser irradiation with the output energy higher than 11.3 W/cm2 was effective in increasing porcelain to zirconia bond strength values. The biaxial flexural strength of zirconia was not significantly affected by laser irradiation with the settings in this study. However, most of the laser treatments still demonstrated slightly lower flexural strength values compared with the control group. No changes in crystalline structure were detected after laser treatment with X-ray Diffraction (XRD) technique. Resin to zirconia shear bond strength was significantly increased after surface coatings. Without surface treatment the bonding between resin and zirconia was susceptible to artificial aging effects. Zirconia and silica-coating groups demonstrated the highest resistance to hydrolytic influence. On the other hand, the chemical changes of zirconia surface were still in need of clarification. It was concluded that porcelain zirconia bonding could be effectively enhanced by applying both sandblasting and a new laser irradiation approach. Laser irradiation might be a potential approach as a surface treatment for improving the quality of porcelain zirconia bonding interface. The strong and reliable resin zirconia integration could not be achieved without appropriate surface pre-treatment. This coating treatment is a promising approach for strengthening resin to zirconia adhesion. DOI: 10.5353/th_b5223979 Subjects: Zirconium oxide Dental materials

Some Surface Treatments for Improving the Durability of Zirconia-based Restorations

Author : 刘丹
Publisher :
ISBN 13 :
Total Pages : 494 pages
Book Rating : 4.:/5 (885 download)

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Book Synopsis Some Surface Treatments for Improving the Durability of Zirconia-based Restorations by : 刘丹

Download or read book Some Surface Treatments for Improving the Durability of Zirconia-based Restorations written by 刘丹 and published by . This book was released on 2014 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Effect of Surface Treatments on Resin-Zirconia Bonding

Author : Fung Yan
Publisher :
ISBN 13 : 9781361026229
Total Pages : pages
Book Rating : 4.0/5 (262 download)

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Book Synopsis Effect of Surface Treatments on Resin-Zirconia Bonding by : Fung Yan

Download or read book Effect of Surface Treatments on Resin-Zirconia Bonding written by Fung Yan 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, "Effect of Surface Treatments on Resin-zirconia Bonding" by Fung, Yan, 忻峰, 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: Zirconia offers a favorable choice for esthetic indirect dental restorations with excellent mechanical properties and biocompatibility. In the hostile oral environment, the longevity of dental restorations relies heavily on whether a strong and stable bond between the restoration and underlying supporting tooth structures can be achieved. However, unlike conventional ceramics, zirconia is a chemically inert material which makes it notoriously difficult to bond with any dental composite resin cement. This thesis aimed at developing and evaluating different zirconia surface pretreatments for improving the resin-zirconia bonding. The first laboratory experiment evaluated the effect of Er, Cr: YSGG laser treatment on topographic changes of zirconia surface. Laser parameters including power, irradiation time and water spray at different levels were tested and the treated zirconia surfaces were assessed by scanning electron microscope (SEM) and atomic force microscope (AFM). Results showed that all three tested laser parameters could affect the topographic changes of zirconia surface. Significant topographic changes were found when the power was set at 3.0 W with 50% water spray for 120 s or the power was set at 4.0 W with 75% water spray for 60 s. The second experiment evaluated the effects of grit-blasting (sandblasting), selective infiltration etching (SIE), 3.0 W and 4.0 W laser zirconia surface treatments on the resin-zirconia bonding. Resin composite was bonded to the treated zirconia which was then sectioned into resin-zirconia micro-beams of a standard size. Microtensile bond strength (MTBS) tests were performed for adhesion strength testing. In dry storage conditions, SIE, grit-blasting and 3.0 W laser groups showed significantly higher MTBSs than the control group while no difference in MTBSs was found between the 4.0 W laser group and the control group. After water storage, SIE treatment showed significant higher MTBSs than the remaining groups. MTBSs of water storage specimens were significantly less than the dry specimens except the ones in 4.0 W groups. Zirconia surface treatments could enhance the resin-zirconia bonding in dry storage conditions. The SIE treatment appeared to provide the strongest resin-zirconia adhesion despite hydrolytic degradation. The third experiment evaluated the fatigue performance of resin-zirconia bonding with different surface treatments. Resin-zirconia beams were prepared and loaded at 36 N with 1.5 Hz frequency for 104 cycles at room temperature, before sectioned for MTBS tests. In dry storage conditions, SIE and grit-blasting groups showed significantly higher MTBSs than the control group while no differences in MTBSs were found among the 3.0 W, 4.0 W and control groups. After fatigue loading, only the SIE and 3.0 W groups showed significantly lower MTBSs while the other groups did not. After water storage, MTBSs of water storage specimens were significantly less than the dry specimens except the ones in SIE and 4.0 W groups. No significant differences in MTBSs were found in all groups after fatigue loading. The SIE group showed significantly higher MTBSs than the other study groups after water storage and fatigue loading. In general, it could be concluded that water and cyclic fatigue environment could affect the resin-zirconia bonding. Subjects: Dental resins Dental bonding Surface treatments Zirconium oxide

Science and Technology of Zirconia II

Author : Manfred Rühle
Publisher :
ISBN 13 :
Total Pages : 866 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Science and Technology of Zirconia II by : Manfred Rühle

Download or read book Science and Technology of Zirconia II written by Manfred Rühle and published by . This book was released on 1984 with total page 866 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Influence of Phosphoric Acid Surface Treatment on Shear Bond Strength Durability of Resin Cement to Zirconia-base Ceramic Conditioned with Different Primers

Download Influence of Phosphoric Acid Surface Treatment on Shear Bond Strength Durability of Resin Cement to Zirconia-base Ceramic Conditioned with Different Primers PDF Online Free

Author : Eman Zuhair Alshehri
Publisher :
ISBN 13 :
Total Pages : 75 pages
Book Rating : 4.:/5 (923 download)

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Book Synopsis Influence of Phosphoric Acid Surface Treatment on Shear Bond Strength Durability of Resin Cement to Zirconia-base Ceramic Conditioned with Different Primers by : Eman Zuhair Alshehri

Download or read book Influence of Phosphoric Acid Surface Treatment on Shear Bond Strength Durability of Resin Cement to Zirconia-base Ceramic Conditioned with Different Primers written by Eman Zuhair Alshehri and published by . This book was released on 2015 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: BACKGROUND: Phosphoric acid treatment has been reported to be relevant for zirconia cleaning after contamination. However, its interaction with different primers is not well known and needs to be investigated. OBJECTIVES: To compare the shear bond strengths (SBS) of resin cement to Y-TZP after phosphoric acid pretreatment and different chemical conditioning protocols, and to test the durability of SBSs after long term storage and thermal cycling conditions. To investigate the effect of phosphoric acid 75 on the surface roughness of a yttrium-stabilized tetragonal zirconia polycrystal ceramic (Y-TZP). METHODS: Sixty bars of zirconia (30 X 5 X 2 mm) were polished and glued to acrylic tubes. Each bar received 3 different surface treatments (control, phosphoric acid and air-abrasion). The bars were randomly assigned into five groups according to different primers applied (No primer, Clearfil ceramic primer, Monobond Plus, Z-prime plus and AZ primer). After that, resin cement was mixed, injected into a mold, and light cured. The specimens were tested in shear on a universal testing machine. Half of the specimens were tested after 24 h water storage and the other half were tested after 90 days of water storage and thermocycling. Non-contact profilometer was used to assess the effect of the three surface pretreatments on surface roughness of zirconia. Mode of failure and surface roughness were evaluated with SEM. Statistical analyses were conducted with mixed-model ANOVA and chi-square tests. RESULTS: The results indicated that Monobond Plus primer showed higher SBS after phosphoric acid treatment compared to other primers used. SBS of all air abrasion groups were higher than phosphoric acid groups. Long term water storage and thermocycling led to a statistically significant decrease in SBS for all groups except Monobond Plus, Z-prime plus and AZ primer after air abrasion treatment. Surface roughness measurements showed no significant differences among the surface treatments. CONCLUSION: Monobond Plus provided the highest SBS to zirconia after phosphoric acid treatment. The findings suggest that the air abrasion is the best surface treatment after contamination of zirconia surface. Monobond Plus, Z-prime plus and AZ primer showed durable SBS after air abrasion treatment and aging process.

Digital Guided Micro Prosthodontics

Author : Haiyang Yu
Publisher : Springer Nature
ISBN 13 : 9811902569
Total Pages : 461 pages
Book Rating : 4.8/5 (119 download)

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Book Synopsis Digital Guided Micro Prosthodontics by : Haiyang Yu

Download or read book Digital Guided Micro Prosthodontics written by Haiyang Yu and published by Springer Nature. This book was released on 2022-06-28 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the clear and simplified clinical techniques for microscopic restoration dentistry. With the help of microscope and hole reference technique (HRT), dentists can design the dimensional relationship and carry it out in preparation precisely. Authors firstly introduce an overview and surgical microscope and auxiliary instruments. In the second part, there are 4 techniques shown in each chapter.

Advanced Dental Biomaterials

Author : Zohaib Khurshid
Publisher : Woodhead Publishing
ISBN 13 : 0081024770
Total Pages : 758 pages
Book Rating : 4.0/5 (81 download)

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Book Synopsis Advanced Dental Biomaterials by : Zohaib Khurshid

Download or read book Advanced Dental Biomaterials written by Zohaib Khurshid and published by Woodhead Publishing. This book was released on 2019-05-24 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Dental Biomaterials is an invaluable reference for researchers and clinicians within the biomedical industry and academia. The book can be used by both an experienced researcher/clinician learning about other biomaterials or applications that may be applicable to their current research or as a guide for a new entrant into the field who needs to gain an understanding of the primary challenges, opportunities, most relevant biomaterials, and key applications in dentistry. Provides a comprehensive review of the materials science, engineering principles and recent advances in dental biomaterials Reviews the fundamentals of dental biomaterials and examines advanced materials’ applications for tissues regeneration and clinical dentistry Written by an international collaborative team of materials scientists, biomedical engineers, oral biologists and dental clinicians in order to provide a balanced perspective on the field

Exploring the Role of Zirconia Surface Treatments on the Properties and the Material's Bonding to Resin Cement

Author : Mahmood Abu Ruja'
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (133 download)

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Book Synopsis Exploring the Role of Zirconia Surface Treatments on the Properties and the Material's Bonding to Resin Cement by : Mahmood Abu Ruja'

Download or read book Exploring the Role of Zirconia Surface Treatments on the Properties and the Material's Bonding to Resin Cement written by Mahmood Abu Ruja' and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Objectives: 1. To evaluate the bond strength of yttria-tetragonal zirconia polycrystalline (Y-TZP), lithium-disilicate, and feldspathic ceramics to 10-methacryloyloxydecyl dihydrogen phosphate (MDP)-containing and non-MDP resin cements. 2. To evaluate the effect of ultrashort-pulse laser (UPL) on surface treatment on Y-TZP surface properties, the material's bond strength to resin cement, and the effect of thermal stress on bond strength. Methods: Lithium-disilicate (LD), feldspathic porcelain (FP), and Y-TZP blocks received surface treatment according to the manufacturer recommendations (LD and FP: hydrofluoric acid, Y-TZP: alumina-blasting), and were luted to human dentin using MDP-containing (UL) or non-MDP adhesive system (UN). Specimens were microtensile tested. Fully-sintered Y-TZP received either no treatment (CTL) or one treatment of: ALB, SIL, or UPL. UPL consisted of either dots (LSD) or lines (LSL) patterns. Surface roughness, contact angle, and crystalline phases were evaluated. Y-TZP were cemented to composite using resin-based cement combined with a silane and MDP-containing adhesive. Specimens were incubated for 48 hours, then microtensile tested directly or after thermocycling. Results: The type of ceramic and the resin cement both had significant effects on bond strength (P≤.001). Y-TZP showed significantly lower bond strength (p.

Zirconia - New Advances, Structure, Fabrication and Applications

Author : Uday M. Basheer Al-Naib
Publisher : BoD – Books on Demand
ISBN 13 : 1837688974
Total Pages : 170 pages
Book Rating : 4.8/5 (376 download)

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Book Synopsis Zirconia - New Advances, Structure, Fabrication and Applications by : Uday M. Basheer Al-Naib

Download or read book Zirconia - New Advances, Structure, Fabrication and Applications written by Uday M. Basheer Al-Naib and published by BoD – Books on Demand. This book was released on 2023-11-08 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive resource for students, researchers, professionals, and enthusiasts eager to understand the science, technology, and applications of zirconia. Its in-depth chapters, authored by experts in the field, provide a holistic view of this extraordinary material. Whether you’re a materials scientist, an engineer, a dentist, or simply intrigued by the wonders of advanced ceramics, Zirconia - New Advances, Structure, Fabrication and Applications will expand your knowledge and inspire your curiosity. Zirconia, a remarkable ceramic material, has taken the world of materials science by storm. In this book, you will explore the diverse facets of zirconia, from its intriguing structure to its innovative applications. Take a journey into the world of zirconia, where innovation knows no bounds. Uncover its secrets, explore its applications, and witness the future of materials science unfold before your eyes.

Advanced Ceramics for Dentistry

Author : James Zhijian Shen
Publisher : Elsevier Inc. Chapters
ISBN 13 : 0128060190
Total Pages : 25 pages
Book Rating : 4.1/5 (28 download)

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Book Synopsis Advanced Ceramics for Dentistry by : James Zhijian Shen

Download or read book Advanced Ceramics for Dentistry written by James Zhijian Shen and published by Elsevier Inc. Chapters. This book was released on 2013-09-05 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ceramic materials are currently applied to two categories of restorative dentistry, as all-ceramic fixed-partial dentures and as implantable components. While the former demands mainly integrated and balanced properties of mechanical and aesthetic origins, the latter also relies strongly on the material’s bio-oriented properties. This chapter discusses the material demands for solving the problems encountered in current practice that indicate the direction for future developments. This is done by bearing in mind both process restrictions and compatibilities. Focus is placed on developing materials that have the potential for improving aesthetics, for preserving a healthy situation to secure a prolonged treatment survival, and for improving the durability and reliability of the restorations while also simplifying the procedures of materials manufacture and clinical operation. Biomimetic materials and processes related to them are topics of general importance from a long perspective.

Bonding to Ceramics

Author : Alvaro Della Bona
Publisher :
ISBN 13 : 9788536700915
Total Pages : 252 pages
Book Rating : 4.7/5 (9 download)

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Book Synopsis Bonding to Ceramics by : Alvaro Della Bona

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.

Prosthodontics Revolution: Modern Techniques in Dental Restorations

Author : Dr Vikas Punia
Publisher : Inkbound Publishers
ISBN 13 : 8197081395
Total Pages : 198 pages
Book Rating : 4.1/5 (97 download)

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Book Synopsis Prosthodontics Revolution: Modern Techniques in Dental Restorations by : Dr Vikas Punia

Download or read book Prosthodontics Revolution: Modern Techniques in Dental Restorations written by Dr Vikas Punia and published by Inkbound Publishers. This book was released on 2022-05-10 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discover the revolutionary techniques transforming dental restorations in prosthodontics. This book covers modern methods and materials, providing dental professionals with the knowledge to implement cutting-edge prosthodontic solutions for their patients.

Advanced Ceramics for Dentistry

Author : James Shen
Publisher : Butterworth-Heinemann
ISBN 13 : 0123948363
Total Pages : 417 pages
Book Rating : 4.1/5 (239 download)

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Book Synopsis Advanced Ceramics for Dentistry by : James Shen

Download or read book Advanced Ceramics for Dentistry written by James Shen and published by Butterworth-Heinemann. This book was released on 2013-09-05 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: The growth of implant and fixed prosthodontics practices in dentistry has created a rapidly increasing demand for advanced ceramics and ceramic processes. Innovations in ceramics and ceramic processes are vital to ensure reliable and affordable dental-restoration solutions with aesthetically pleasing outcomes. The work aims to engage the bioceramics and engineering communities to meet the challenges of modern dental restoration using advanced ceramics. Incorporating fundamental science, advanced engineering concepts, and clinical outcomes, the work is suitable for bioceramicists, ceramics manufacturers, dental clinicians and biologists. State-of-the-art-coverage encompasses bioresorbable ceramics for bone regeneration and bioactivating surfaces of inert, high-strength ceramics for implantation, keeping research knowledge appropriately updated Discusses transition from the baseline stable and physically stiff ceramics research into engineering of highly coherent laminate composites for prosthetic crowns and bridges Showcases current feasible techniques for producing, in cost-effective and materials-saving ways, long-lasting individualized ceramic components with biocompatibility, complexity and high precision

Handbook of Intelligent and Sustainable Smart Dentistry

Author : Ajay Kumar
Publisher : CRC Press
ISBN 13 : 104009614X
Total Pages : 393 pages
Book Rating : 4.0/5 (4 download)

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Book Synopsis Handbook of Intelligent and Sustainable Smart Dentistry by : Ajay Kumar

Download or read book Handbook of Intelligent and Sustainable Smart Dentistry written by Ajay Kumar and published by CRC Press. This book was released on 2024-08-05 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the exponential growth of science and technology, the delivery of dental care has shifted from conventional methods to intelligent techniques. In addition to adapting intelligent techniques, sustainable dental practice is of the utmost importance. Eco-friendly dentistry, sustainable dentistry, or green dentistry are approaches that reduce the environmental impact of dental practice and help safeguard planetary and community well-being. This handbook provides the latest and most comprehensive evidence-based guidance on intelligent and sustainable approaches in dentistry. Handbook of Intelligent and Sustainable Smart Dentistry: Nature and Bio-Inspired Approaches, Processes, Materials, and Manufacturing highlights how Dentistry 4.0 has come to the rescue after COVID-19 and how it has helped in providing needed e-healthcare. This handbook bridges the gap between research and development in the field of smart dentistry for professionals and clinicians. Intelligent materials, equipment, instrumentation, and the latest behavior management techniques and how these techniques provide superior care and treatment to society are explored in detail. The scope of nature-inspired techniques and procession, along with green solutions, are also discussed in this one-of-a-kind handbook. This valuable handbook is a single-stop solution for practitioners, researchers, scholars, students, academicians, and clinicians interested in updating their knowledge on intelligent and sustainable dentistry. The handbook will bestow the readers with not only theoretical knowledge but will equip them with clinical skills as well.

Bioceramics 15

Author : Besim Ben-Nissan
Publisher : Trans Tech Publications Ltd
ISBN 13 : 3035704104
Total Pages : 1010 pages
Book Rating : 4.0/5 (357 download)

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Book Synopsis Bioceramics 15 by : Besim Ben-Nissan

Download or read book Bioceramics 15 written by Besim Ben-Nissan and published by Trans Tech Publications Ltd. This book was released on 2003-05-15 with total page 1010 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume is indexed by Thomson Reuters CPCI-S (WoS). Since their inception Bioceramics meetings have provided a treasure house of information for both scientists and clinicians in the medical field. The clinical applications are numerous, in particular in the areas of orthopaedics, maxillofacial, plastic and ocular surgery, percutaneous devices, tissue engineering and sensors. This volume in addition to research papers contributed also presents selected overviews and discussions on recent bioceramics research and trends.

Advances in Ceramics

Author : Costas Sikalidis
Publisher : BoD – Books on Demand
ISBN 13 : 9533073500
Total Pages : 566 pages
Book Rating : 4.5/5 (33 download)

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Book Synopsis Advances in Ceramics by : Costas Sikalidis

Download or read book Advances in Ceramics written by Costas Sikalidis and published by BoD – Books on Demand. This book was released on 2011-09-06 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current book consists of twenty-four chapters divided into three sections. Section I includes fourteen chapters in electric and magnetic ceramics which deal with modern specific research on dielectrics and their applications, on nanodielectrics, on piezoceramics, on glass ceramics with para-, anti- or ferro-electric active phases, of varistors ceramics and magnetic ceramics. Section II includes seven chapters in bioceramics which include review information and research results/data on biocompatibility, on medical applications of alumina, zirconia, silicon nitride, ZrO2, bioglass, apatite-wollastonite glass ceramic and b-tri-calcium phosphate. Section III includes three chapters in applications of ceramics in environmental improvement and protection, in water cleaning, in metal bearing wastes stabilization and in utilization of wastes from ceramic industry in concrete and concrete products.

Influence of Saliva Contamination on Resin Bond Durability to Zirconia - Effect of Cleaning Methods

Author : Dhara Patel
Publisher :
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.:/5 (927 download)

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Book Synopsis Influence of Saliva Contamination on Resin Bond Durability to Zirconia - Effect of Cleaning Methods by : Dhara Patel

Download or read book Influence of Saliva Contamination on Resin Bond Durability to Zirconia - Effect of Cleaning Methods written by Dhara Patel and published by . This book was released on 2015 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Background and Rationale: As compared with glass-based ceramics, zirconia has gained considerable popularity in restorative dentistry due to its superior mechanical properties. Clinically, however, zirconia ceramics pose a significant challenge regarding the achievement of a reliable and durable bond to resin-based cements. Thus far, it has been established that zirconia bond to resin-based cements can be enhanced after different surface conditioning methods, such as airborne particle abrasion with aluminum oxide particles. Meanwhile, another major issue pertaining to bonding of ceramic restorations is related to its potential contamination before cementation. Briefly, after sandblasting and clinical try-in procedures, zirconia can be contaminated with saliva and/or blood. As with many metals, zirconium shows a strong affinity towards the phosphate group found in saliva and other fluids, which reacts with the zirconia surface and makes bonding very difficult. Recently, a new cleaning agent called Ivoclean (Ivoclar-Vivadent), which is an alkaline suspension of zirconium oxide particles, has been introduced in the market to remove contamination from zirconia in an effort to improve bonding to resin cements. Objective: The purpose of this study was to evaluate the influence of saliva contamination and the effect of several cleaning methods, including Ivoclean on resin bond strength to zirconia. Materials and Methods: Eighty square-shaped specimens (phi = 12 mm x 12 mm x 3 mm) of yttria-stabilized full-contour zirconia (Diazir, Ivoclar-Vivadent, Amherst, NY) were sectioned from zirconia blocks using a water-cooled diamond blade. Then, these specimens were embedded in acrylic resin, and their surfaces gradually finished with silicon carbide papers (600 grit to 1200 grit). The prepared zirconia surfaces were sandblasted with 50-microm aluminum oxide particles for 15 s, under 2.5 bars and from distance of 10 mm. After sandblasting the specimens were cleaned in an ultrasonic bath containing distilled water for 5 min and air-dried for 10s. All samples were equally divided into 4 groups (n = 20) according to the cleaning method. Airborne particle abraded specimens without contamination was served as the control group. Remaining groups were contaminated with saliva, and subjected to different cleaning protocols, namely: Ivoclean, 70% isopropanol, and no treatment. Two resin cement buttons (Multilink - Ivoclar-Vivadent, Amherst, NY) were built over each zirconia surface and light-cured following the manufacturer recommendations. The influence of contamination and surface cleaning methods on ceramic bond durability were examined after 24 h on half of the samples in each group (n = 10, n = 20), and the other half (n = 10, n = 20) specimens will undergo 6000 thermocycles (TC) before shear bond testing in the universal testing machine. Conclusion of Expected Outcomes: The shear bond strength of resin cement to zirconia led to a significant improvement after cleaning with Ivoclean both immediately and after thermal aging.