Download or read book The Influence of Blood and Hemostatic Agent Contamination on Bond Strength of Orthodontic Attachments Cemented with Resin Modified Glass Ionomer Cement written by Bryce Willcox and published by . This book was released on 2005 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of the Effects of Moisture Contamination on the Bond Strength of a Resin Modified Glass Ionomer Cement when Bonding Orthodontic Brackets to Porcelain written by Jennifer L. Martin and published by . This book was released on 1996 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Relationship Between Bond Strength and Bonding Agent when Resin reinforced Glass Ionomer Cements are Used to Bond Orthodontic Attachments to Bovine Enamel written by Kathryn S. Coups Smith and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Clinical Trial of Orthodontic Bonding Agents written by Andrew Tringas and published by . This book was released on 1998 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Microtensile Bond Strength of New Paste paste Resin modified Glass Ionomer Cement System written by Yasser Fawaz Al-Fawaz and published by . This book was released on 2011 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Background: In order to improve the clinical performance of RMGIC 3M ESPE and GC America introduced paste/paste resin-modified glass ionomer cements, Ketac [trademark symbol] Nano and Fuji Filling [trademark symbol] LC, respectively. Both companies developed non-rinse substrate conditioners (i.e., Ketac Nano Primer-3M ESPE and GC Self-Conditioner-GC America) that should be used with these new materials instead of the conventional polyacrylic acid. It has been also advised by both manufacturers to use this novel substrate conditioner with the previously marketed RMGICs. Objective: to investigate whether the use of novel non-rinse conditioners (i.e., Ketac Nano Primer 3M ESPE and GC Self Conditioner GC America) as substrate pre-treatment and the new paste/paste resin-modified glass-ionomer cement, RMGIC (Ketac [trademark symbol] Nano 3M ESPE and Fuji Filling [trademark symbol] LC GC America) would affect the microtensile dentin bond strength (æTBS) of the material when compared to the traditional RMGIC with polyacrylic acid as a surface substrate pre-treatment. Materials and Methods: 96 extracted non-restored human molar were sectioned to expose occlusal dentin. Dentin surface was finished with SiC paper to standardize the smear layer. Bonding protocols of the different materials to dentin were performed following the use of two dentin conditioners. Eight groups (n=12) were tested: G1: Ketac Nano Primer + Ketac Nano, G2: Ketac Conditioner + Ketac Nano, G3: Ketac Nano Primer + Photac Fil, G4: Ketac Conditioner + Photac Fil, G5: GC Self Conditioner + Fuji Filling LC, G6: GC Cavity Conditioner + Fuji Filling LC, G7: GC Self Conditioner + Fuji II LC and G8: GC Cavity Conditioner + Fuji II LC. The specimens were stored in 37°C for 24h in 100% humidity before cutting non-trimmed beams for the æTBS with cross-sectional areas of approximately 0.8 × 0.8 mm2. Nine beams were used from each specimen. Test was done using universal testing machine at a cross-head speed of 1mm/min. Debonded specimens were examined under a stereomicroscope at 45× magnification to evaluate the failure mode. Eight randomly chosen representative debonded beams were imaged under a scanning electron microscope (SEM). Results: æTBS in MPa (mean " SE) were: G1: 9.5"1.0, G2: 11.0"1.0, G3:20.0"1.0, G4:16.8"0.9, G5: 15.1"1.0, G6: pre-test failure, G7: 20.0"1.0, G8:14.1"0.9. Weibull-distribution survival analysis was used to compare the differences in microtensile peak stress among the groups. Group5 has cohesive predominant faultier mod while the other groups have adhesive predominant failure. Conclusion: Within the limitations of this study, the use of the novel non-rinse conditioners did not improve the microtensile bond strength of new paste/paste RMGIC to dentin. In fact, the use of the novel non-rinse conditioners enhanced the bond strength of the traditional RMGIC to dentin.
Download or read book Diametral Tensile Strength Microhardness Surface Modulus and Surface Morphology of Novel Antibacterial Orthodontic Adhesives written by Jeffrey Harold Godel and published by . This book was released on 2016 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objective: Prior to the advent of bonded orthodontic appliances each tooth was fitted with a band made from stainless steel. Traditionally they were cemented to the tooth with a zinc phosphate cement. This acted more as a luting agent then adding to the actual adherence of the band to the tooth. In addition, often times the cement would wash out and upon the band removal white spot lesions and or carious lesions were present. The development of glass monomer cements had a traumatic improvement over both the adhesion to the tooth and a diminishing of white spot lesions in part due to the release of fluoride. Since the advent of the acid-etch technique and the bonding of orthodontic brackets directly to the enamel various bonding adhesives were developed. The first and most popular bonding resins were chemical curing bonding systems. The general class of self-adhesive and/or self-etching orthodontic adhesives are of several types, including resin-modified cements, such as resin-modified glass ionomer cements, that exhibit self-adhesive properties to enamel, as well as self-etching primers that combine the conditioning and priming agents into one acidic, polymerizable composition for application to the tooth surface, and do not require separate etching and rinsing steps. Not only do resin modified glass ionomers have the benefit of chemically bonding to a clean and un-etched enamel surface, but these self-adhesive cements also release significant and continuous levels of fluoride ion. Recently investigators have explored adding antimicrobial agents in addition to fluoride in orthodontic adhesives. One such approach has been the addition of ZnO powder, a known compound with anti-microbial properties, to an orthodontic resin modified glass ionomer adhesive. It should also be noted that zinc ions and compounds have been shown to positively influence enamel remineralization and enhance apatite formation. The objective of this research is to evaluate the effect of the addition of an antimicrobial agent, zinc oxide powder, on selected mechanical properties of a resin modified glass ionomer orthodontic adhesive. Methods: A resin modified glass ionomer (Fuji Ortho LC), in its two-component, powder/liquid format were utilized in this study. Control specimens, according to manufacturer's directions for use, were prepared for both diametral tensile and microhardness testing with be prepared. Using the powder component provided in the marketed product; powder blends containing both 10 and 20 percent Zinc Oxide (by weight) will be added to the RMGI powder, and thoroughly mixed and blended to create a uniform powder blend. The mechanical testing will be performed on 8-10 disc specimens, approximately 6.2 mm diameter by 3.1 mm in height, using a standardized mixing and molds for each material. The specimens will be tested using the Instron 5569 testing machine at a crosshead speed of 0.75 mm/minute for DTS until failure occurs. Data was recorded in Newton's (N) force. The microhardness testing was performed on 12 disc specimens, approximately 6.2 mm diameter by 3.1 mm in height, using a standardized mixing and molds for each material. A CSM microindentation testing device was used to measure theVickers microhardness. The surface morphological evaluation of the specimens both control and experimental will be examined at 50 X magnification for comparison of surface characteristics and morphology. One-way ANOVA for comparison of time- and material-specific mean Vickers microhardness values and post hoc pair-wise comparisons was employed to assess statistically significant differences in the mean values (p
Download or read book Effects of Saliva Contamination on Bond Strength of Resin Luting Cements to Dentine written by 鍾慧敏 and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Dentin Bonding Agents on Shear Bond Strength of Metal Orthodontic Attachments Bonded to Dentin written by George Y. Soh and published by . This book was released on 1994 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Comparison of Bond Strength Between Three Glass Ionomer Cements Used for the Retention of Orthodontic Bands written by Bryan C. Johnson and published by . This book was released on 1998 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Light Cure Initiation Time on Polymerization and Orthodontic Bond Strength with a Resin Modified Glass Ionomer written by Jess Thomas and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction: The polymerization and acid-base reactions in resin-modified glass-ionomers (RMGI) are thought to compete with and inhibit one another. The objective of this study was to examine the effect of visible light-cure (VLC) delay on the polymerization efficiency and orthodontic bond strength of a dual-cured RMGI. Methods: An RMGI light-cured immediately, 2.5, 5, or 10 minutes after mixing comprised the experimental groups. Isothermal and dynamic temperature scan differential scanning calorimetry (DSC) analysis of the RMGI was performed to determine extents of VLC polymerization and acid-base reaction exotherms. Human premolars (n = 18/group) were bonded with the RMGI. Shear bond strength and adhesive remnant index (ARI) scores were determined. Results: DSC results showed the 10 minute delay RMGI group experienced significantly (P 0.05) lower VLC polymerization compared to the other groups. Acid-base reaction exotherms were undetected in all groups except the 10 minute delay group. No significant differences (P0.05) were noted among the groups for mean shear bond strength. A chi-square test showed no significant difference (P = 0.428) in ARI scores between groups. Conclusions: Delay in light-curing may reduce polymerization efficiency and alter the structure of the RMGI, but orthodontic shear bond strength does not appear to be compromised.
Download or read book Orthodontic Band Retention Using Microetching and Resin modified Glass Ionomer and Conventional Glass Ionomer Cements written by Maria Teresa Gutierrez Paras and published by . This book was released on 1994 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Different Enamel Conditioning on the Bond Strength of a Resin Modified Glass Ionomer Cement and Ceramic Brackets written by Dauro Douglas Oliveira and published by . This book was released on 2000 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Retention of the Orthodontic Bands Invitro Study written by Priya K and published by . This book was released on 2017-01-26 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: RETENTION OF THE ORTHODONTIC BANDS... IN VITRO STUDY - authored by DR. PRIYA K, MDS. DR. PRIYA K is a renowned scholar and author from India. She is a brilliant medical professional with a Masters degree in Dental Surgery in Orthodontics and Dentofacial Orthopaedics from M.S.Ramaiah Dental College, Bangalore. Born in Palakkad and educated in Bangalore, she is a highly respected teacher of medical profession and widely appreciated for her gentle and friendly disposition. A wonderful and charming person in essence, as graceful and perfect as she is, she is highly regarded for her kind and selfless nature. She started her teaching career at senior levels at Sri Rajiv Gandhi Institute of Dental Sciences and Research, Bangalore and later as the senior-most Reader at Sri Guru Ram Das Institute of Dental Sciences and Reaserch, Amritsar. The latter Institute has honoured her by awarding her the prestigeous membership of the Editorial Review Board of its scholarly Journal, Indian Journal of Comprehensive Dental Care (IJCDC). Dr. Priya K presently lives in Bangalore. Orthodontic band has been in clinical use for more than 100 years. In spite of the wide spread use of direct bonded brackets and tubes in clinical orthodontics, the conventional band still plays an important role in fixed appliance therapy.Although bonding of orthodontic tubes to the teeth is receiving much current interest in the form of indirect bonding, the vast majority of buccal attachments are still being cemented using stainless steel bands and conventional cements, considering the force levels in the posterior region. Enamel demineralization under orthodontic bands is a serious, but a common problem to all orthodontists. White spot formation or enamel decalcification can occur whenever bacterial plaque is retained on enamel surface for a prolonged period.By the presence of fixed appliance the efficiency of home prophylactic procedure is greatly reduced and there is a need for protection of adjacent enamel surface. Inadequate bonding strength of dental cement, seal break down, solubility of the currently used dental cements in oral fluids and poor oral hygiene all contribute to the initiation of decalcification.Several studies in the past have investigated the chemical composition of various cements, their physical and chemical properties and their application as well as use in restorative dentistry. The retention of orthodontic bands to the tooth surface is important to ensure fixed appliance therapy. Numerous agents have been used to retain orthodontic bands. Guttapercha, zinc oxide eugenol, zinc polyacrylate cement, zinc polycarboxylate cement, resin based cements, zinc silicophosphate and black copper cement have all been investigated. More recently attention has been focused on glass ionomer cement.Sand blasting of the metal surface improves retention by roughening, thereby increasing the surface area and providing a potential for a degree of mechanical attachment . It not only increases the retentive area of the band luting surface, but also removes contaminants and thins the stainless steel oxide layer leaving a more firmly attached layer for bonding.This technique of air abrasion or sand blasting was introduced in 1950's. It uses a high-speed stream o f aluminum oxide particles propelled by compressed air. Although initially reintroduced as a method to roughen the surface of any dental materials before cementation, it is routinely used in cast metal restoration to enhance the bond strength; more recent marketing includes its application to orthodontics to roughen the internal surface of the bands and bracket bases.This in-vitro study is undertaken to explore and emphasize the possibilities of increasing bond strength with newer hybrid cement s and subsequently sand blasting the inner surface of the bands to enhance bond strength.
Download or read book Evaluation of Tensile Bond Strength of Glass Ionomer Cements for Orthodontic Bonding written by W. Ray Sprayberry and published by . This book was released on 1992 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bond Strength of Esthetic Posts written by John Raymond Kurtz and published by . This book was released on 2001 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cementation Protocol in FPD written by Dr. Arpana Verma and published by Book Rivers. This book was released on 2024-08-22 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
