Download or read book The Effect of Etch Time and Debond Interval Upon Shear Bond Strength Using Metallic Orthodontic Brackets written by Muhamad Subra Bin Abdullah and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles in Contemporary Orthodontics written by Silvano Naretto and published by BoD – Books on Demand. This book was released on 2011-11-25 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: Orthodontics is a fast developing science as well as the field of medicine in general. The attempt of this book is to propose new possibilities and new ways of thinking about Orthodontics beside the ones presented in established and outstanding publications available elsewhere. Some of the presented chapters transmit basic information, other clinical experiences and further offer even a window to the future. In the hands of the reader this book could provide an useful tool for the exploration of the application of information, knowledge and belief to some orthodontic topics and questions.
Download or read book Self Etching Primers and Shear Bond Strength of Orthodontic Brackets written by Amit Goyal and published by LAP Lambert Academic Publishing. This book was released on 2011-12 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-etching primers are the latest addition to the armamentarium of an orthodontist. Their main advantage is that they reduce the number of steps required in the bonding of orthodontic brackets. However, their low ph was a cause of concern. This book describes a study undertaken to see the effects of ph of self-etchant on shear bond strength of orthodontic brackets. These shear bond strengths were also compared to those obtained with a conventional 3-step bonding system. It was found that self-etching primers not only reduce the chair time in an orthodontist's clinic but also reduce the amount of enamel lost during etching. The bond strength achieved was less than that of the conventional bonding system but was acceptable for orthodontic purposes. Thus self-etching primers are an important and useful invention for simplifying the most critical step in orthodontic clinic- bonding.
Download or read book Effect of Prophylactic Debridement on Shear Bond Strength of Orthodontic Brackets when Using a Self etching Primer written by Mark A. Bieszki and published by . This book was released on 2005 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 A Comparison of Shear Bond Strengths of Orthodontic Brackets Bonded Using Self etching Primer with Varying Time Intervals Between Activation and Application written by Katherine D. Plunkett and published by . This book was released on 2016 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Shear Bond Strength of Orthodontic Bracket Base Shapes to Human Enamel an in Vitro Study written by Ziana Esmail and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction: There is a growing demand for esthetic appliances during orthodontic treatment, with a specific interest in WildSmiles shaped brackets amongst children and adolescents. Bond failure of brackets over the course of orthodontic treatment can result in increased treatment time, increased overhead costs, and feelings of frustration for the patient and practitioner. Objective: The purpose of this study was to the evaluate the effect of orthodontic bracket base shape on shear bond strength (SBS) to human enamel, in vitro, at two time points, as well as the nature of debonding fractures using the Adhesive Remnant Index (ARI). Methods: Orthodontic brackets with different shaped bases (flower, heart, rectangular) were bonded to 120 extracted human third molars. SBS was measured using a Servohydraulic Test System at 24 hours and 2 months after initial bonding. ARI scores were evaluated under 10x magnification to assess the amount of resin left on the tooth. Results: The control bracket with a rectangular base shape had the highest mean SBS (26.78 ± 8.19 MPa), and significantly differed from flower (17.19 ± 4.45 MPa) and heart (18.86 ± 3.50 MPa) base shapes (p 0.001). The mean SBS of flower and heart shaped brackets did not differ considerably from each other (p 0.05). The mean SBS between debond times at 24 hours (21.50 ± 7.46 MPa) and 2 months (20.38 ± 6.69 MPa) were not statistically significant (p > 0.05). Analysis of ARI scores showed a significant difference between Flower-24 hours vs Heart- 2 months (p=0.039), Flower-24 hours vs Heart- 24 hours (p=0.004), and Control-2 months vs Heart-24 hours (p=0.015). The heart shaped bracket had a greater proportion of adhesive bond failures at the enamel-resin interface. Conclusion: Bracket base shape has an effect on SBS, with the rectangular base shape having a higher mean SBS compared to flower and heart base shapes. All bracket shapes had bond strengths above the clinically acceptable range of 6-8 MPa, and thus may provide adequate SBS in a clinical situation. Variations in ARI scores occurred based on bracket shape and were of a mixed adhesive-cohesive nature.
Download or read book Shear Bond Strength of Brackets Adhered to Laser Etch Versus Acid Etch written by Hakam Alfaqheri and published by LAP Lambert Academic Publishing. This book was released on 2011-10 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many studies have been done on the shear bond strength of brackets adhered to acid-etched enamel and so far, there is no study on shear bond strength of brackets adhere to laser-etched enamel in Iraq. So, this study is an attempt to compare the shear bond strength of brackets adhered to laser-etched enamel with that of brackets adhered to acid-etched enamel. The application of laser irradiation to etch dental enamel for direct bonding of orthodontic appliance has been studied. CO2 (Carbon Dioxide) laser are capable of producing surface irregularities in human enamel which resemble those resulting from etching of enamel with ortho-phosphoric acid. Whether laser conditioning improves the retention of composite resins to the same degree as conventional acid-etching techniques has been the subject of several investigations.
Download or read book The Effects of an Air powder Polishing Device on the Shear Bond Strength of Two Orthodontic Metal Bracket Adhesive Systems written by Patti Ann Hawkins Jacob and published by . This book was released on 1991 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this investigation was to evaluate the effects of air-powder polishing on shear bond strength in vitro for two metal bracket adhesive systems currently in use for direct orthodontic bonding procedures. Ninety-six third molar teeth with flattened enamel surfaces were randomly assigned to be bonded with metal brackets using either a two paste or a no-mix orthodontic adhesive resin. Thwelve samples in each treatment group were air-powder polished for 0, 15, 30, or 60 seconds. Each bracket adhesive bond was then tested for shear strength using the Instron Universal Testing Device. Scanning electron microscopy determined the fracture pattern of representative samples from each treatment group. Mean shear bond strength values for each treatment group were calculated and expressed in magapascals (MPa). Values from baseline to 60 seconds varied from 22.9 ± 1.9 MPa to 18.2 ± 4.1 MPa for the two paste system and from 15.5 ± 2.1 MPa to 14.6 ± 1.9 MPa for the no-mix adhesive. Differences between the adhesive systems at all air-powder polishing times were statistically significant (p d".05). Statistical analysis by a two-way ANOVA in combination with the Newman-Keuls Multiple Range Test for pairwise mean comparisons determined a differential effect of air-powder polishing on the bond strength of the two adhesive systems. After 60 seconds of air-powder polishing, results showed a significant decrease (p d".05) in the mean bond strength of the two paste adhesive resin when compared to baseline, 15, and 30 second treatments. No significant time effect of air-powder polishing was found for the no-mix adhesive system. SEM analysis of the bond failure sites showed tooth-adhesive, within adhesive and bracket-adhesive fracture patterns for the viewed samples of each adhesive type and air-powder polishing treatment time. Fractures within tooth structure were also noted for the two paste system, indicating strong enamel-adhesive-bracket bonds. Differences in the fracture pattern of the two paste 60 second air-powder polishing group may account for the differential effect of treatment. Although in vitro results showed decreased bond strength for the two paste system, use of air-powder polishing for the routine maintenance of the orthodontic patient should not affect clinical performance of this adhesive.
Download or read book Bond Strength In Orthodontics written by Rahamath Ulla Khan and published by LAP Lambert Academic Publishing. This book was released on 2014-03-06 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Demineralization of enamel has been one of the iatrogenic effects of fixed orthodontic therapy, for which various authors have suggested the use of fluoride to reduce the decalcification and development of white spot lesion. In the present study, the shear bond strength of light-cure composite adhesive, self-cure composite adhesive, light-cure glass ionomer cement and acidic primer were tested at the end of 24 hours after bonding. The results proved that the acidic primer system had highest shear bond strength while Light-cure glass ionomer system had the least shear bond strength. But the mean values met the minimal shear bond strength required for orthodontic bonding. After bond failure, least amount of glass ionomer cement was present on the enamel surface, followed by acidic primer system, light-cure composite and self-cure composite system. So, it is advantageous to use light-cure glass ionomer cement for bonding in terms of less amount of time spent and no enamel damage during cleaning procedure after debonding.
Download or read book Effect of Phosphoric Acid Etching Prior to Application of Self etching Primer SEP on Shear Bond Strenght written by Grace Shao-Chiu Chen and published by . This book was released on 2010 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: INTRODUCTION: The objective of this study was to determine the effect of phosphoric acid etching prior to application of self-etching primer on orthodontic bonding in terms of shear bond strength and the adhesive remnant on the enamel surface at debonding. METHODS: Fifty-one extracted human premolars were pumiced, rinsed, dried, and then subjected to three different treatments: Group 1: no phosphoric acid etching + Transbond Plus SEP; Group 2: 15-second etching with 37% phosphoric acid + rinsed + dried + Transbond Plus SEP; Group 3: 30-second etching with 37% phosphoric acid + rinsed + dried + Transbond Plus SEP. Precoated metal brackets (3M Unitek, APC Plus, Victory brackets) were then bonded following the manufacturer's recommendation. An Instron Universal Testing Machine was used to test shear bond strength (SBS) at a crosshead speed of 0.5 mm/min. Adhesive remnant index (ARI) was assigned to all specimens under a 16 times magnification using a light microscope. RESULTS: One-way repeated measured analysis of variance test (ANOVA) revealed no significant differences in shear bond strength among all three groups. Kruskal Wallis test revealed that there was a significant difference in ARI score between Group 1 when compared to Groups 2 and 3. Two-way analysis of variance was used to examine any statistical difference in frequency of enamel fracture craters among the three groups. CONCLUSION: There was no statistical difference in shear bond strength between the three groups. Most specimens demonstrated adequate shear bond strength (>/= 6 MPa) for routine clinical application. Etching enamel with phosphoric acid prior to the use of Transbond Plus SEP resulted in more adhesive remaining on the enamel surface. The removal of this excess surface cement may lead to increased enamel loss during post debonding clean up.
Download or read book BONDING IN ORTHODONTICS written by DR.ARCHANA KUMARI and published by Book Rivers. This book was released on 2022-03-14 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: The evolution of orthodontic materials in the past 5 decades has been a unique progress curve characterized by periods of intense activity with many developments followed by long quiescent intervals. An example of the delay in adopting the advances in dentistry might well be illustrated by the acid-etching technique, which was introduced in the mid 1950s1 and became universally accepted in the 1960s. It took more than a decade for this practice to become standard procedure in orthodontics on a large scale. Infact, orthodontic bonding has advanced more in last 10 years than previous 25. In the past decade, we have witnessed unprecedented progress in bonding to enamel with various materials techniques and auxiliaries involving glass ionomer bonding, self-etching primers, and new, powerful light-curing sources, along with self-ligating brackets and a different treatment concept, the Invisalign technique.
Download or read book Bond Strengths of Orthodontic Brackets Using 3 Etching Techniques written by Shilpa Jamenis and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was carried out to evaluate and compare the shear bond strengths between the orthodontic bracket and acid etched enamel, enamel treated with self-etch primer and laser irradiated enamel and to analyze the interface of the enamel bracket bond.It will help students, teachers and othodontia practitioners as it deals with the most contemporarily used bonding techniques. The results indicate that the shear bond strength of all the three groups was clinically acceptable with no significant difference between them but more adhesive was left on enamel treated with acid and laser as compared to self-etch primer treated enamel.
Download or read book Comparison of Two Self Etch Primers and a Fluoride Sealant on Shear Bond Strength of Precoated Brackets written by Debby Wong and published by . This book was released on 2009 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction: In an attempt to save chair time during bonding, self-etching primers are used along with metal brackets that are precoated with adhesive material. Fluoride releasing sealants has also been used commonly to prevent decalcification during orthodontic treatment. The purpose of this study was to compare the shear bond strength (SBS) of APC precoated brackets bonded with two different self-etching primers: Transbond Plus self-etch primer (TPSEP) and Reliance self-etch primer. This study also evaluated the effect of combining TPSEP or the Reliance SEP with LED Pro Seal, a fluoride releasing sealant for the enamel surface. Each of the self-etching primers (SEPs) and the combination of SEP combined LED Pro Seal were evaluated for shear bond strength after 24 hours of storage and thermocycling with 1 week of storage, in order to simulate some of the temperature changes in the oral cavity.^Materials and Methods: One hundred and twelve teeth were randomly divided into eight groups as follows: Group 1: Transbond Plus self-etch primer (TPSEP), Group 2: Reliance self-etch primer (Reliance), Group 3: TPSEP and LED Pro Seal, Group 4: Reliance and LED Pro Seal, Group 5: TPSEP with thermocycling, Group 6: Reliance with thermocycling, Group 7: TPSEP and LED Pro Seal with thermocycling, Group 8: Reliance and LED Pro Seal with thermocycling. An occlusogingival load was applied to the brackets producing a shear force at the bracket-tooth interface utilizing a Universal Testing Machine. Results: Significant differences in shear bond strengths among the groups containing the TPSEP or Reliance SEP, were detected by two-way ANOVA (p = 0.018). The results of the Newman-Keul's test that compared the test groups at 24 hours show that the shear bond strength of Reliance SEP (3.98 MPa " 1.30) was not statistically different from TPSEP (4.25 MPa " 1.16).^When each of the SEP is combined with the Pro Seal, a statistical difference in shear bond strength is detected between TPSEP (6.01 MPa " 3.05) and Reliance SEP (3.76 MPa " 1.52). Reliance SEP used alone vs. Reliance SEP combined with Pro Seal did not show any statistical difference in shear bond strength. However, when TPSEP was compared to TPSEP combined with Pro Seal, it showed a statistical difference in shear bond strength. Nonetheless, a two-way ANOVA did not detect any statistically significant interaction between the SEPs and the Pro Seal (p = 0.058). None of the groups showed statistically significant differences in shear bond strength when compared at the one week group. Conclusion: The newly introduced Reliance SEP provides similar shear bond strengths to Transbond Plus SEP. Reliance SEP with LED Pro Seal and Transbond Plus SEP with LED Pro Seal both provide adequate shear bond strengths.^Both SEPs used alone or with LED Pro Seal maintained its bond strength after thermocycling. LED Pro Seal is demonstrated to have good bond strength to enamel and can withstand the oral environment.
Download or read book Etching Time Effects on the Bond Strength of Three Adhesive Systems written by Hung D. Pham and published by . This book was released on 2002 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Phosphoric Acid Etch in Conjunction with Self etching Primer on Enamel Surfaces and Resultant Orthodontic Bracket Bond Strength written by Michael Bruce Olsen and published by . This book was released on 2013 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study examined the methods of preparing the enamel surface for orthodontic bracket adhesion in overcoming pellicle and possible fluid contamination from prebonding cleaning techniques and the effect of these treatments on the enamel surface and resultant bond strength. Shear bond strength testing, Raman linear mapping, and scanning electron microscopy was used to evaluate shear bond strength, depth of resin interface, and surface and cross-sectional characteristics respectively. Based on an analysis of variance (a=.05), there was a significant effect of pretreatment enamel conditioning prior to self-etching primer application on shear bond strength. This difference was found to exist solely between the pumice prophylaxis group and the 34% phosphoric acid etch group. No difference was found to exist across all groups with regards to depth of resin penetration. Scanning electron microscopy showed no significant differences in enamel surface or resin/enamel interface characteristics. Results suggest that enamel cleaning techniques prior to SEP application are unnecessary and even deleterious to bond strength and resin penetration.
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1996 with total page 1328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
