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The Effect Of Phosphoric Acid Etch In Conjunction With Self Etching Primer On Enamel Surfaces And Resultant Orthodontic Bracket Bond Strength
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Book Synopsis The Effect of Phosphoric Acid Etch in Conjunction with Self-etching Primer on Enamel Surfaces and Resultant Orthodontic Bracket Bond Strength by : Michael Bruce Olsen
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.
Book Synopsis Effect of Phosphoric Acid Etching Prior to Application of Self-etching Primer (SEP) on Shear Bond Strenght by : Grace Shao-Chiu Chen
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.
Book Synopsis Self-Etching Primers and Shear Bond Strength of Orthodontic Brackets by : Amit Goyal
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.
Book Synopsis Orthodontic Bracket Bond Strength Using Self-etching Primer with Or Without Pumice Or Acid Etch Pretreatment by : Ana Paula DeCastro
Download or read book Orthodontic Bracket Bond Strength Using Self-etching Primer with Or Without Pumice Or Acid Etch Pretreatment written by Ana Paula DeCastro and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to compare the shear bond strength of orthodontic brackets to enamel in four bonding protocols: SEP without prior pumicing (None), Pre-etch and SEP without prior pumicing (Pre-etch), control: SEP with prior pumicing (Pumice), and Pre-etch and SEP with prior pumicing (Both). 80 extracted bovine incisors were randomly divided into 4 groups of 20, and brackets were bonded under the different experimental conditions. Debonding force was measured with an Instron universal testing machine. A two-way ANOVA comparing the four groups indicated that there was a significant difference in debonding force (P = 0.001). The SEP without prior pumicing group (17.69 " 7.18 MPa) was statistically different from the SEP group with prior pumicing (25.82 " 6.84 MPa). There was no statistical difference found among the other groups. Differences in the Adhesive Remnant Index (ARI) were analyzed by chi-square. ARI scores differed significantly (P =0.0048).
Book Synopsis Comparison of Two Self-Etch Primers and a Fluoride Sealant on Shear Bond Strength of Precoated Brackets by : Debby Wong
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.
Book Synopsis Bond Strengths of Orthodontic Brackets Using 3 Etching Techniques by : Shilpa Jamenis
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.
Book Synopsis Alternative Orthodontic Bonding Protocol Using Self Etching Primer by : Rush-Baker G. Caldwell
Download or read book Alternative Orthodontic Bonding Protocol Using Self Etching Primer written by Rush-Baker G. Caldwell and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the current study was to develop a bonding method that can achieve clinically acceptable bond strength values while leaving a minimum amount of adhesive on the tooth surface during the debonding process. One hundred teeth were randomly assigned into groups. Five different enamel surface preparation protocols were tested (N = 20, each): Conventional acid etch, standard SEP, SEP applied with a light brush stroke (altered SEP 1), SEP applied directly to the composite of pre-coated bracket (altered SEP 2), and Primer Only groups. Brackets were debonded using an Instron universal testing machine (Instron, Canton, MA) in shear mode and the mean shear bond strength values were calculated. In addition, enamel surfaces were examined under light microscope to determine the location of failure using ARI. The Primer Only group had significantly lower mean shear strength (0.14 MPa, P0.05) than the conventional acid etch (13.81 MPa), standard SEP (12.10 MPa), altered SEP 1 (10.80 MPa), and altered SEP 2 (11.48 MPa) groups. The conventional acid etch, standard SEP, altered SEP 1 and altered SEP 2 groups were not significantly different from each other (p0.05). With respect to ARI values, there was a significant difference among these four groups. 85% of samples in the altered SEP 2 group had 10% or less composite resin left on their surfaces. This group had also a mean shear bond strength value of 11.43 MPa, significantly above the minimal strength needed for orthodontic attachment bonding, and the lowest ARI values overall. Therefore, application of SEP directly to the composite resin of the pre-coated brackets may be an ideal bonding method by providing adequate bond strength and leaving a minimum amount of composite resin on the tooth surface during debonding. It should be kept in mind that future in-vivo studies would be needed to confirm the findings obtained from the current in-vitro study.
Book Synopsis Proceedings of an International Symposium on the Acid Etch Technique by : Leon M. Silverstone
Download or read book Proceedings of an International Symposium on the Acid Etch Technique written by Leon M. Silverstone and published by . This book was released on 1975 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Orthodontic Applications of Biomaterials by : Theodore Eliades
Download or read book Orthodontic Applications of Biomaterials written by Theodore Eliades and published by Woodhead Publishing. This book was released on 2016-11-22 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Orthodontic Applications of Biomaterials: A Clinical Guide reviews the applications of biomaterials and their effects on enamel preparation, bonding, bracket and archwire ligation, mechanotherapy, debonding, and long-term enamel structural, color, and surface effects. The book provides a step-by-step analysis of the phenomena occurring, their clinical importance, and their underlying cause without the use of complex mathematical or physical-chemical analyses, with the goal of providing ‘digestible’ evidence for the clinician. Serves as a reference source of the spectrum of biomaterials used in orthodontics Presents the most current evidence of state-of-the-art methods of materials research Provides substantiation for the effects occurring during the materials’ uses
Book Synopsis Influence of Orthodontic Bracket Bonding Protocol on Zirconia Ceramics and Resulting Bond Strength, Adhesive Remnant, and Debonded-Polished Zirconia Surface Roughness by : Kaylee Anne Bergman
Download or read book Influence of Orthodontic Bracket Bonding Protocol on Zirconia Ceramics and Resulting Bond Strength, Adhesive Remnant, and Debonded-Polished Zirconia Surface Roughness written by Kaylee Anne Bergman and published by . This book was released on 2019 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objective: This study evaluated the effect of primer protocol for metal orthodontic brackets bonded to zirconia ceramic and resulting shear bond strength (SBS), adhesive remnant index (ARI), and debonded and polished zirconia surface roughness. Methods: Zirconia specimens were milled, glazed, embedded in acrylic resin and the target area microetched with aluminum oxide. Glazed and microetched representative specimens were evaluated with energy dispersive spectroscopy (EDS). Specimens were randomly assigned to primer protocol, enamel (TransbondTM Plus Self-Etching Primer) or zirconia (Assure® Plus), and primed according to manufacturer instructions. Metal orthodontic brackets were bonded to the primed surface with resin adhesive (Transbond XTTM) and light cured. To simulate intraoral conditions, all primer and bonding protocols took place in an environmental chamber set at 33±2°C and 75±5% humidity followed by a 24-hour dark cure at 37 C. Following SBS testing, an ARI value was assigned to debonded brackets. Residual adhesive was removed from the debonded zirconia specimens, the zirconia surface polished, and surface roughness measured using a profilometer. Scanning electron microscopy (SEM) was performed for qualitative evaluation of the zirconia surface. Results: Zirconia substructure exposure by aluminum oxide microetching was verified with EDS. A significantly lower (p
Book Synopsis Orthodontic Materials by : Wiliam A. Brantley
Download or read book Orthodontic Materials written by Wiliam A. Brantley and published by Thieme. This book was released on 2011-01-01 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this important new textbook all scientific and clinical aspects of orthodontic materials are described.Recent developments in science and technology have led to the introduction of a plethora of new orthodontic products. This work serves as an excellent source of information for a field that requires knowledge of basic elements of materials science, engineering, chemistry, and physics, as well as clinical orthodontics. The subject has been part of graduate orthodontic education for almost three decades. Besides servicing the orthodontic training programs, the book also - investigates the interactions of orthodontic materials with other dental materials as well as hard tissues in the oral cavity,- gives a background to allow for proper material selection for efficient orthodontic mechanics,- treats the issues of biocompatibility, cytotoxicity and mutagenicity of materials.
Book Synopsis A Clinical Investigation of the Effect of the Reduction in Phosphoric Acid Concentration and Duration of Etch on the Retention of Orthodontic Brackets by : Christy Arris Jebeles
Download or read book A Clinical Investigation of the Effect of the Reduction in Phosphoric Acid Concentration and Duration of Etch on the Retention of Orthodontic Brackets written by Christy Arris Jebeles and published by . This book was released on 1993 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Clinical Investigation of the Effect of the Reduction in Phosphoric Acid Concentration and Duration of Etch on the Retention of Orthodontic Brackets by : Lane Alan Smith
Download or read book A Clinical Investigation of the Effect of the Reduction in Phosphoric Acid Concentration and Duration of Etch on the Retention of Orthodontic Brackets written by Lane Alan Smith and published by . This book was released on 1993 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Phosphoric Acid Gel on the Tensile Strength of Direct Bonded Orthodontic Brackets Using Concise Bonding Agent by : David Stahl Bright
Download or read book The Effect of Phosphoric Acid Gel on the Tensile Strength of Direct Bonded Orthodontic Brackets Using Concise Bonding Agent written by David Stahl Bright and published by . This book was released on 1980 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Acid Etch Duration on the Shear Bond Strength of a Ceramic Bracket to Tooth Enamel by : Yuni Chen
Download or read book Effect of Acid Etch Duration on the Shear Bond Strength of a Ceramic Bracket to Tooth Enamel written by Yuni Chen and published by . This book was released on 1991 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ultra-Structural Aspects of Human Enamel Surface Pretreatments by : Jiajun Zhu
Download or read book Ultra-Structural Aspects of Human Enamel Surface Pretreatments written by Jiajun Zhu 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, "Ultra-structural Aspects of Human Enamel Surface Pretreatments" by Jiajun, Zhu, 朱嘉珺, 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: Enamel acid etching has been studied for almost 60 years, i.e., since successful enamel adhesion was first achieved. It was proposed to be due to the micro-mechanical interlocking based on the use of phosphoric acid to etch the so-called ideal etching pattern etching, at certain conditions. According to the systematically screened 2500 non-duplicated publications, with the inclusion of 175 laboratory studies and 18 clinical trials, phosphoric acid etching was found and is still considered to produce promising bonding on intact enamel surfaces. However, other etching agents, such as poly(acrylic acid), self-etching primers (SEP), non-rinse conditioners and other acids could also contribute to satisfactory bond strengths without creating too high surface roughness, etching depth and/or morphological alteration. Thus, an ideal etching pattern might not be necessary in enamel adhesion. An unduly use of ideal etching pattern in literature to assess the enamel adhesion seems more prone to the flaw observations and vague conclusions. Therefore, a fundamental understanding of enamel adhesion is vital. In this thesis, an ultra-structural investigation based on chemical composition, crystallography, micro-roughness, morphology, micro-hardness and surface tension, on intact human mature enamel with various pretreatment methods were studied, with an ethical approval (HKWC-HKU Cluster REC/IRB document No.: UW13-262). The current study found that phosphoric acid etching by liquids and gels could remove the superficial aprismatic enamel layer. The acid etching could also generate a rougher, softer and porous enamel surface, whilst commercial SEPs that contain 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP) and 2-(methacryloyloxy)ethyl phosphates (HEMA-phosphates) left excess amounts of phosphates onto enamel surfaces and showed a minor demineralization effect. Furthermore, mono-HEMA-phosphate solutions could demonstrate both mild etching and a chemically reactive effect on the intact enamel, particularly when at 40 v/v%. All the pretreatment methods used in this study could effectively increase enamel surface free energy, i.e. physical adsorption deemed to be the critical factor rather than micro-mechanical adhesion in enamel adhesion. Apparently, the measurement of surface free energy was probably more appropriate than morphological examination to evaluate the enamel surface pretreatment method. In addition, due to the insignificant etching effect, the definition of "self-etching" might need to be re-considered. To conclude, the current ultra-structural investigation on various intact human enamel pretreatment methods may offer new insights about the basics and fundamental theory for enamel adhesion. This may yet lead to a better development of primers to serve and enhance clinical dentistry. DOI: 10.5353/th_b5387962 Subjects: Dental enamel - Ultrastructure
Book Synopsis Bond Strengths of Orthodontic Brackets Bonded to Enamel Using Self-etching Primers Under Humid Conditions by : Robert James Nudera (Jr.)
Download or read book Bond Strengths of Orthodontic Brackets Bonded to Enamel Using Self-etching Primers Under Humid Conditions written by Robert James Nudera (Jr.) and published by . This book was released on 2005 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
