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Effectiveness Of Universal Adhesive Bonding Agents On The Shear Bond Strength To Lithium Disilicate Ceramics
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Book Synopsis EFFECTIVENESS OF UNIVERSAL ADHESIVE BONDING AGENTS ON THE SHEAR BOND STRENGTH TO LITHIUM DISILICATE CERAMICS by : Mohammed AlRabiah
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
Book Synopsis Bonds and Contact Angles Produced with Surface Alterations to Lithium Disilicate by : Vamsi Krishna Kalavacharla
Download or read book Bonds and Contact Angles Produced with Surface Alterations to Lithium Disilicate written by Vamsi Krishna Kalavacharla and published by . This book was released on 2013 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: The success of ceramic restorations depends upon factors like the composite resin cement, the adhesive, cementation procedure and the substrate. With the introduction of newer ceramic and adhesive systems the factors that contribute to the most durable bond strength remains unclear. The objective of the study was to measure 24 hour and thermocycled shear bond strength of a composite to lithium disilicate glass ceramic with a universal single bottle adhesive. A combination of surface treatments of hydrofluoric acid, silane, salivary contamination and subsequent cleaning were also evaluated. Blocks of lithium disilicate (e.max CAD) were sectioned, polished with a rotational polishing device using a series of SiC disks and finished with 0.5[mu] Al2O3 slurry. All specimens were cleaned in an ultrasonic cleaner and were examined to ensure uniform surface finish. Surface treatments were done with concentrations of hydrofluoric acid and silane in various combinations followed by a bonding agent, according to the manufacturer's protocols. A cylinder of composite of diameter (1.5mm) was bonded to the cured adhesive and specimens were stored for 24 hours. In the next part of the study; saliva, collected from a single participant (2hrs postprandial), was pipetted onto the etched and silanated surfaces. Additionally some surfaces were cleaned using reagent alcohol or 35% phosphoric acid and the bonding agent applied, cured and composite cylinders bonded. For both the studies, the specimens were tested at 24 hours after bonding and the second group thermocycled for 10,000 cycles (5-50°C/15 sec dwell time) and debonded. For debonding the specimens were subjected to shear loading until failure using a universal testing machine and the shear bond strength calculated from the peak failure load. Contact angle measurements and scanning electron microscopy were used to analyze the effects of the treatments on the specimen surfaces. Data were analyzed with ANOVA and Tukey/Kramer post-hoc tests (p=0.005). Data were presented as estimated marginal means (least-square means).
Book Synopsis Effect of Different Surface Treatments on the Shear Bond Strength of Lithium Disilicate Ceramic by : Mai Almujel
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
Book Synopsis Assessment of the Bond Strength Between Resin Cement and Lithium Disilicate Based Glass Ceramics with Different Chemical Composition and Surface Treatments by : Muna Jr Bebsh
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.
Book Synopsis Shear Bond Strength of Resin Cements to a Densely Sintered AL2O3 Ceramic Material by : Wedad Yassin Awliya
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:
Book Synopsis Enamel Bond Strength of New Universal Adhesive Bonding Agents by : Deidra McLean
Download or read book Enamel Bond Strength of New Universal Adhesive Bonding Agents written by Deidra McLean and published by . This book was released on 2013 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Silane Coupling Agents by : Edwin P. Plueddemann
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.
Book Synopsis Tensile Bond Strength of Four All-ceramic Systems to Dentin by : Olga A. Efstratopoulou
Download or read book Tensile Bond Strength of Four All-ceramic Systems to Dentin written by Olga A. Efstratopoulou and published by . This book was released on 1997 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Microtensile Bond Strength of Self-adhesive Resin Cements to Lithium Disilicate Ceramics by : Shamsiahwati Mat-Rani
Download or read book Microtensile Bond Strength of Self-adhesive Resin Cements to Lithium Disilicate Ceramics written by Shamsiahwati Mat-Rani and published by . This book was released on 2010 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 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 by : Hanan Al-Johani
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.
Book Synopsis 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 by : Sunhong Hwang
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:
Book Synopsis A Clinical Evaluation of a Self-etch, Self-adhesive Resin Cement for Bonding Indirect All-ceramic Restorations by : Anthony Khoo
Download or read book A Clinical Evaluation of a Self-etch, Self-adhesive Resin Cement for Bonding Indirect All-ceramic Restorations written by Anthony Khoo and published by . This book was released on 2008 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Book Synopsis Comparing Shearbond Strength - Ethyl Cyanoacrylate & Self-cure Acrylic by : Jacob John
Download or read book Comparing Shearbond Strength - Ethyl Cyanoacrylate & Self-cure Acrylic written by Jacob John and published by LAP Lambert Academic Publishing. This book was released on 2013 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traditional bonding materials are incapable of bonding in presence of moisture, are challenged by "Moist-field" bonding materials. Claims and counter claims are made regarding their, efficacy to use as ideal orthodontic bonding adhesives. Present study done to compare Shearbondstrength of Ethyl cyanoacrylate(Smart Bond) and self cure acrylic(Rely-a-Bond) under different conditions. Rely-a-Bond and Smart Bond, are acceptable bonding materials in dry and wet conditions respectively with regards to Shear bond strength values per se. Rely-a-Bond showed significant increase in Shear bond strength from 1 hour to 24 hours. Smart Bond shows significant decrease in Shear bond strength over time. Rely-a-Bond has significantly increased Shear bond strength than Smart Bond at all times. Rely-a-Bond has high probability of failure at 1 hour; however show drastic improvement at 24 hours. Hence usage of Rely-a-Bond, force application should be deferred for 24 hours. Smart Bond adhesive is unsuitable for use as a bonding agent in routine orthodontic practice. However, the ability of this adhesive to adhere to wet surfaces could enable practitioners to bond attachments in wet conditions.
Book Synopsis A Textbook of Fixed Prosthodontics by : Stig Karlsson
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:
Book Synopsis Esthetic Oral Rehabilitation with Veneers by : Richard D. Trushkowsky
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.
Book Synopsis Shear Bond Strength of Combining Resin Cements with Varying Bonding Agents by : Christopher Merkley
Download or read book Shear Bond Strength of Combining Resin Cements with Varying Bonding Agents written by Christopher Merkley and published by . This book was released on 2018 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
