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 PDF Download
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Author: Sunhong Hwang
Publisher:
ISBN:
Category :
Languages : en
Pages : 122
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Book Description
Author: Sunhong Hwang
Publisher:
ISBN:
Category :
Languages : en
Pages : 122
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Book Description
Author: Huma Iftekhar
Publisher: LAP Lambert Academic Publishing
ISBN: 9783845438405
Category :
Languages : en
Pages : 88
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Book Description
The widespread demand for, and use of dental adhesives has fueled an intense development of better and easier dental adhesives in rapid succession and dentists have literally been inundated with successive "generations" of adhesive materials. The "generational" definitions help in identification of chemistries involved, the strength of dentinal bond and the ease of use for the practitioner.The clinical use of resin composites has expanded considerably over the past few years due to increased esthetic demands by patients, new improved formulations and simplification of bonding procedures. Evaluation of bond strength provides a screening mechanism use of adhesives and an indication of the potential for their clinical success.the purpose of this study was to find and compare the shear bond strength of three different generation of adhesive systems fifth, sixth and seventh to dentin of human molars using same composite.
Author: Didier Dietschi
Publisher: Elsevier España
ISBN: 9788445805954
Category : Medical
Languages : en
Pages : 230
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Book Description
This work offers a simple yet comprehensive approach to the aesthetic adhesive restoration of posterior teeth. the direct, semidirect and indirect techniques, as well as luting and finishing procedures, are covered in detail.
Author: Mohammed AlRabiah
Publisher:
ISBN:
Category :
Languages : en
Pages : 55
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Book Description
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
Author: Riyaz Rahbeeni
Publisher:
ISBN:
Category : Dental adhesives
Languages : en
Pages : 142
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Book Description
The purpose of this study is to test the shear and tensile bond strengths and adhesive failure modes of a self-adhesive luting resin in the bonding of a polyglass material by comparing it to other classes of resin luting cements and their bonding protocols.
Author: Edwin P. Plueddemann
Publisher: Springer Science & Business Media
ISBN: 1489903429
Category : Science
Languages : en
Pages : 238
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Book Description
* 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.
Author: Ali A. Al-Eheideb
Publisher:
ISBN:
Category :
Languages : en
Pages : 278
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Book Description
Author: Preethi Mohan
Publisher:
ISBN:
Category :
Languages : en
Pages : 160
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Book Description
Cementing of indirect restorations with resin cements generally requires the pre-treatment of dentin with an adhesive. When dual-cured or chemical-cured resin cements are used with these single-step adhesives, incompatibility issues exist. This has resulted in manufacturers making chemical changes in their products. Kerr Dental markets a new resin cement, Nexus Third generation (NX3), which utilizes a proprietary redox system different from the second generation of composite luting agent (NX2). The aim of this study was to evaluate microtensile bond strength and mode of failure of NX3 and NX2 with two different adhesive systems (total-etch and self-etch) after 1 week and after 3 months of storage. Methods: Sixty-four non-carious teeth were sectioned to expose the dentin using a low-speed saw. Dentin surfaces were ground with 320-grit SiC paper. The adhesives Optibond Solo Plus (SOL), and Optibond All In One (AIO) were applied, and resin cements (NX2, NX3) were used to lute 4-mm composite discs to the treated dentin surfaces. Microtensile bond strength was determined at 1 week (IM) and after 3 months (3MON) of storage using a universal testing machine (MTS). All specimens were examined under the stereomicroscope to determine the mode of failure. Random specimens from each failure group were examined using scanning electron microscopy. Statistical Analysis: Comparisons between the treatment combinations for differences in microtensile bond strength were performed using Weibull-distribution survival analysis. Comparisons between the treatment combinations for differences in the failure mode were performed using Fisher's Exact tests. The group NX3 SOL IM (30.5 MPa) had significantly higher bond strength than NX3 SOL 3MON (13.4 MPa); NX3 AIO IM (11.3MPa); NX3 AIO 3MON (8.2 MPa; NX2 AIO 3MON (5.8 MPa); NX2 SOL IM (6.3 MPa), and NX2 SOL 3MON (3.2 MPa). The group NX2 AIO IM (19.3 MPa) was not significantly different from NX3 SOL IM. The group NX2 SOL 3MON and group NX2 SOL IM had a significantly higher percentage of teeth with mixed failure than all of the other groups. None of the other groups had significantly different failure mode. The group NX3 SOL IM had 90-percent beam survival beyond 17 MPa, and NX2 AIO IM had 50 percent of beams surviving beyond 17 MPa, a better performance. For all the other groups, more than 50 percent of beams failed below 17 MPa. Results show high evidence of degradation for all groups considered in this investigation. The use of these types of cement adhesive combinations in clinical situations should be used with this understanding.
Author: Joon Park
Publisher: Springer Science & Business Media
ISBN: 0387095454
Category : Technology & Engineering
Languages : en
Pages : 362
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Book Description
Bioceramics: Properties, Characterization, and Applications will be a general introduction to the uses of ceramics and glasses in the human body for the purposes of aiding, healing, correcting deformities, and restoring lost function. With over 30 years experience, the author developed the text as an outgrowth of an undergraduate course for senior students in biomedical engineering and will emphasize the fundamentals and applications in modern implant fabrication, and will also deal with tissue engineering scaffolds made of ceramics. Organized as a textbook for the student needing to acquire the core competencies, it will meet the demands of advanced undergraduate or graduate coursework in bioceramics, biomaterials, biomedical engineering, and biophysics.
Author: Nisha Garg
Publisher: Boydell & Brewer Ltd
ISBN: 9788184487756
Category : Medical
Languages : en
Pages : 528
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Book Description
This new edition is a complete guide to operative dentistry. Beginning with an introduction, physiology, dental caries and tooth preparation, the text also discusses pain and infection control. The following sections examine different operative procedures. New techniques such as minimal intervention dentistry, nanotechnology and lasers; and advances in dental materials are discussed in detail. More than 1200 colour images, illustrations, flow charts and tables are included. Key points Complete guide to operative dentistry Discusses numerous different procedures, and pain and infection control New techniques and advances in materials described in detail More than 1200 colour images, illustrations, flow charts and tables Previous edition published in 2010
