Download or read book Effect of Refrigerant Spray on Orthodontic Composite Resin bracket Debond Strength and Associated Adhesive Remnant Index written by Lauren Ashley Gossett and published by . This book was released on 2012 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study evaluated effects of refrigerant spray and crosshead speed on orthodontic composite resin shear debond strength and Adhesive Remnant Index (ARI) after bond failure. Orthodontic brackets were bonded to forty paired extracted mandibular third molars. Pairs were divided into experimental and control groups, with and without refrigerant spray prior to debond, respectively. Each group was further divided into two subgroups based on crosshead speed of 1 or 10 mm/min. Bracket shear debond strength was tested with a universal testing machine and ARI scores assessed. Results showed no statistically significant difference for shear debond strength or ARI score as a function of refrigerant spray usage. Statistically significant differences were shown for shear debond strength and ARI score as a function of crosshead speed. As crosshead speed increased, shear debond strength and ARI score both increased. These results indicate that application of refrigerant spray prior to bracket debonding is not beneficial.

Download or read book Debonding and Fixed Retention in Orthodontics written by Theodore Eliades and published by John Wiley & Sons. This book was released on 2023-08-22 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: Debonding and Fixed Retention in Orthodontics An accessible and thorough guide to debonding and fixed retainer bonding Debonding and Fixed Retention in Orthodontics: An Evidence-Based Clinical Guide reviews the protocols, materials, and techniques required at two key stages of orthodontic treatment. The book has been written as a reference guide and the chapters introduce the best-supported and most efficient approaches to each stage of debonding and fixed retainer bonding treatments, from choice of material through to final results. The book includes relevant procedures including orthodontic appliance removal, appliance debonding, the use of rotating instruments, and enamel cleaning. The authors also provide guidance on topics such as the failure and adverse effects of fixed retainers, enamel structural defects, periodontal effects, and aerosol production, to aid in positive result retention. Readers will also find: Two extensive sections covering debonding and fixed retainer bonding Evidence-based guidelines for each stage of treatment Summaries of the side effects of procedures on hard and soft dental tissues Tips to avoid potential unfavorable sequelae Detailed lists of existing methods and their clinical implications Debonding and Fixed Retention in Orthodontics is written for orthodontic specialists, clinicians, and postgraduate dental students looking to build knowledge and ensure the best results during these two stages of orthodontic therapy.

Download or read book Orthodontic Bracket Bond Strength and Resin Composite Adhesive Degree of Conversion Associated with Type of Curing Unit and Total Energy written by Natalia Henbest and published by . This book was released on 2013 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study examined the effect of light curing sources on shear bond strength and degree of conversion of orthodontic resin composite adhesive as function of type of curing unit and total energy, as well as evaluated the correlation between shear bond strength and degree of conversion. Curing units included in the study were plasma arc (PA), light emitting diode (LED) and quartz tungsten halogen (QTH) with 5k, 10k, or 15k mJ/cm2 of total energy delivered to the orthodontic adhesive by each unit type. Based on an analysis of variance (a =.05), there was no significant effect of type of curing source on shear bond strength; however, there was a significant effect of total energy, with shear bond strength increasing as energy increased across curing units. For degree of conversion there was a significant effect of curing unit with PA producing higher degree of conversion than LED or QTH, which were not significantly different from each other. There was also a significant effect of total energy on degree of conversion with a significant increase between 5k to 10k mJ/cm2. There was a positive moderate overall correlation between shear bond strength and degree of conversion. Results of this study suggest that the PA curing unit is more efficient at polymerization (degree of conversion) of orthodontic resin composite adhesive. However, there is no difference in shear bond strength produced when using PA, LED or QTH curing sources for orthodontic bracket bonding procedures when equal total energy is delivered to the adhesive.

Download or read book Determining the Effect of Primekote Bracket Conditioner on Orthodontic Bond Strength written by Gary L. Jennings and published by . This book was released on 1999 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optimizing the Shear Bond Strength of Orthodontic Brackets Using Hybrid Glass Ionomer Materials written by Yung-Jeng Song and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1996 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Highly Filled Light cured Resin Sealant on Bracket Shear Bond Strength in Demineralization Conditions written by Brad Michael Chun and published by . This book was released on 2018 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study examined the effect of a highly filled light-cured sealant (HFLCS) on bracket shear bond strength and subsequent adhesive remnant index (ARI) following exposure to cariogenic challenge. Specimens were divided into two groups to receive conventional primer or HFLCS prior to orthodontic bracket bonding in a simulated oral environment. After curing bracket adhesive, specimens were separated into two storage solutions, either phosphate buffered saline or a demineralization solution (pH 4.1) for 96 hours. Brackets then underwent shear bond strength testing followed by ARI scoring. Enamel surfaces were visually examined for white spot lesion (WSL) severity using a WSL scoring index. HFLCS and exposure to demineralization conditions were not significant factors in shear bond strength or subsequent adhesive fracture pattern (ANOVA, p>.05). The majority of brackets were given an ARI score of 1, meaning that greater than 50% of the resin adhesive remained on the bracket. A significant difference (p

Download or read book The Effect of Surface Treatments and Bonding Agents on the Shear Bond Strengths of Orthodontic Brackets Bonded to Aged Composite Resin Restorations written by Matthew Yun Sun Tse and published by . This book was released on 2013 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objective: To compare the mean bond strengths and mode of bond failure, in vitro, of five bonding systems (MIP 1, Plastic Conditioner 2, Assure 2, Scotchbond 3, and Transbond XT 1), when bonding an orthodontic bracket to an artificially-aged composite resin restoration, with and without mechanical surface preparation with a diamond bur. Methods: Class V buccal composite resin restorations were prepared in 240 upper right central incisor dentoform teeth. The restorations were artificially age d for 35 days, bonded with metal brackets, stored in distilled water at 37°C for 30 days, thermocycled for 500 cycles, and subsequently debonded with an Instron universal testing machine. Results: The mean bond strengths for Transbond, MIP, Plastic Conditioner, Assure, and Scotchbond groups were 12.1, 12.3, 13.3, 17.2, and 17.7 MPa respectively. The mean bond strengths for Transbond+Diamond, MIP+Diamond, Plastic Conditioner+Diamond, Assure+Diamond, and Scotchbond+Diamond groups were 18.5, 16.4, 19.1, 19.5, and 20.7 MPa respectively. ANOVA revealed a statistically significant diffe rence (P d"0.05) among the groups. Conclusions: Mechanically roughening the surface of a composite resin restoration with a diamond bur, provided significantly greater bond strengths, regardless of the bonding resin used. However, Assure and Scotchbond, without diamond bur preparation, provided similar bond strengths to Transbond, MIP and Plastic Conditioner, with diamond bur preparation. 1. 3M Unitek, Monrovia CA 2. Reliance Orthodontic Products, Itasca IL 3. 3M ESPE, St. Paul MN.

Download or read book Effect of Delayed Polymerization Time and Bracket Manipulation on Orthodontic Bracket Bonding written by Michael J. Ponikvar and published by . This book was released on 2014 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study examined the effect of bracket manipulation in combination with delayed polymerization times on orthodontic bracket shear bond strength and degree of resin composite conversion. Orthodontics brackets were bonded to extracted third molars in a simulated oral environment after a set period of delayed polymerization time and bracket manipulation. After curing the bracket adhesive, each bracket underwent shear bond strength testing followed by micro-Raman spectroscopy analysis to measure the degree of conversion of the resin composite. Results demonstrated the shear bond strength and the degree of conversion of ceramic brackets did not vary over time. However, with stainless steel brackets there was a significant effect (p ≤ 0.05) of delay time on shear bond strength between the 0.5 min and 10 min bracket groups. In addition, stainless steel brackets showed significant differences related to degree of conversion over time between the 0.5 min and 5 min groups, in addition to the 0.5 min and 10 min groups. This investigation suggests that delaying bracket adhesive polymerization up to a period of 10 min then adjusting the orthodontic bracket may increase both shear bond strength and degree of conversion of stainless steel brackets while having no effect on ceramic brackets.

Download or read book Bond Strengths and Fluoride Release of Modified Glass Ionomer and Resin Adhesives written by Douglas Rix and published by . This book was released on 1999 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of a Fluoride Varnish Duraflor on Demineralization Adjacent to Orthodontic Brackets Bonded with Composite Resin Or Resin Modified Glass Ionomer written by Jason Lee Schmit and published by . This book was released on 2000 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Orthodontic Bracket Drift Associated with Photopolymerization Vs Non photopolymerization of Assure Universal Bonding Adhesive written by Anthony P. Blackman and published by . This book was released on 2015 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nonmetallic Materials and Composites at Low Temperature written by G. Hartwig and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: This, the second special topical conference on the properties of Non-Metallic Materials at Low Temperatures, was sponsored by the International Cryogenic Materials Conference Board. The potential for plastics materials in the field of cryogenics is vast and as yet only partly explored. In addition, many other materials, which qualify for the title non-metallic but are not 'plastics', have numerous possible outlets in low temperature technology. This conference aimed at providing a forum, whereby specialists from Industry, the Universities and from Government sponsored Institutions could assemble to discuss the extent of our current knowledge. As it transpired, the meeting was also to high light the considerable gaps that still exist in our fundamental understanding of the low temperature behaviour of these materials. On this theme, during the course of the conference, a reference was made to an almost forgotten quotation by Lord Kelvin, who said: "When you cannot measure what you are speaking about, when you cannot express in numbers, your knowledge is of a meagre and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely in your thoughts advanced to the stage of a science, whatever the matter be." This simple statement sums up the aims, objectives and hopefully the achievements of this conference. To discuss and disseminate the current knowledge on non-metallic materials in order that realistic predictions of in-service performance may be made.

Download or read book Orthodontic Bracket Adhesives monomer Reactivity written by Richard Gillies and published by . This book was released on 1985 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Materials and Processes written by Barrie D. Dunn and published by Springer. This book was released on 2015-12-29 with total page 677 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this book is to assist scientists and engineers select the ideal material or manufacturing process for particular applications; these could cover a wide range of fields, from light-weight structures to electronic hardware. The book will help in problem solving as it also presents more than 100 case studies and failure investigations from the space sector that can, by analogy, be applied to other industries. Difficult-to-find material data is included for reference. The sciences of metallic (primarily) and organic materials presented throughout the book demonstrate how they can be applied as an integral part of spacecraft product assurance schemes, which involve quality, material and processes evaluations, and the selection of mechanical and component parts. In this successor edition, which has been revised and updated, engineering problems associated with critical spacecraft hardware and the space environment are highlighted by over 500 illustrations including micrographs and fractographs. Space hardware captured by astronauts and returned to Earth from long durations in space are examined. Information detailed in the Handbook is applicable to general terrestrial applications including consumer electronics as well as high reliability systems associated with aeronautics, medical equipment and ground transportation. This Handbook is also directed to those involved in maximizing the relia bility of new materials and processes for space technology and space engineering. It will be invaluable to engineers concerned with the construction of advanced structures or mechanical and electronic sub-systems.

Download or read book The Care and Handling of Art Objects written by Marjorie Shelley and published by Metropolitan Museum of Art. This book was released on 2019-06-25 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Metropolitan Museum of Art houses one of the world’s largest and most comprehensive collections of works of art from antiquities to modern and contemporary material. Their preservation is a responsibility shared by the many individuals employed at the Museum who oversee and have direct contact with the collection on a daily basis. The Care and Handing of Art Objects—first published in the 1940s and continually updated—offers a guide to the best practices in handling and preserving works of art while on display, in storage and in transit. It explains many of the fundamental principles of conservation that underlie these methods. One of its goals is to make the complexities of caring for a collection readily accessible. The first part offers basic guidelines for the preservation of the diverse types of materials and art objects found in the Met. Each chapter addresses the physical characteristics specific to the particular category, and the environmental, handling and housing factors to which one should be alert to prevent damage and ensure their preservation. Written by experts in the respective specialty, it addresses the Museum’s vast holdings summarizing the most critical preservation issues, many of which are amplified by photographs. As the table of contents makes evident these range from paintings on canvas and works on paper and photographs to furniture and objects made of stone, wood and metals to arms and armor, upholstery, ethnographic materials and many others. Part II succinctly describes factors that affect the collection as a whole: among them, current environmental standards for temperature, relative humidity, light exposure, storage and art in transit. Based on Museum protocols it addresses emergency preparedness and response, and integrated pest management. For easy reference, it includes charts on storage and display conditions, on factors contributing to deterioration, and a glossary of conservation terms, principles, and housing materials referenced in the individual chapters. Drawing upon the knowledge of conservators, scientists, and curators from many different departments, as well as technicians and engineers whose expertise crosses boundaries of culture, chronology, medium and condition, The Care and Handing of Art Objects is primarily directed to staff at the Met. It is, no less, an invaluable resource for students, collectors, small museums, museum study programs, art dealers, and members of the public who want to enhance their understanding of how works of art are safeguarded and the role environment, handling and materials play in making this possible.

Download or read book Texas Dental Journal written by and published by . This book was released on 1909 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues for 1962- include as a separate section the association's annual roster.

Download or read book Introduction to Basic Manufacturing Processes and Workshop Technology written by Rajender Singh and published by New Age International. This book was released on 2006-12 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manufacturing and workshop practices have become important in the industrial environment to produce products for the service of mankind. The basic need is to provide theoretical and practical knowledge of manufacturing processes and workshop technology to all the engineering students. This book covers most of the syllabus of manufacturing processes/technology, workshop technology and workshop practices for engineering (diploma and degree) classes prescribed by different universities and state technical boards.