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Dental bonding

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https://www.readbyqxmd.com/read/28343670/comparison-of-porcelain-bond-strength-of-different-metal-frameworks-prepared-by-using-conventional-and-recently-introduced-fabrication-methods
#1
Necati Kaleli, Duygu Saraç
STATEMENT OF PROBLEM: Most studies evaluating dental laser sintering systems have focused on the marginal accuracy of the restorations. However, the bond strength at the metal-ceramic interface is another important factor that affects the survival of restorations, and currently, few studies focus on this aspect. PURPOSE: The purpose of this in vitro study was to compare the porcelain bond strength of cobalt-chromium (Co-Cr) metal frameworks prepared by using the conventional lost-wax technique, milling, direct metal laser sintering (DMLS), and laser cusing, a direct process powder-bed system...
March 23, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28331805/prevotella-osteomyelitis-after-dental-capping-procedure
#2
Alexander Williams, Thomas Kerkering
We present a 49 year old man who presented to the emergency department with severe lower back pain of 5 days duration. One week prior he had been diagnosed with a right psoas muscle abscess and was discharged with a 28 day course of moxifloxacin after the preliminary culture from the psoas grew an anaerobic organism. MRI of the lumbar spine showed marrow edema in the L2 body, occupying most of the anterior two thirds of the body, with cortical erosion at the anteroinferior aspect of L1. Blood cultures were negative and bone biopsy of L2 showed neutrophilic invasion and reactive changes...
2017: IDCases
https://www.readbyqxmd.com/read/28327437/evaluating-the-effect-of-antioxidant-agents-on-shear-bond-strength-of-tooth-colored-restorative-materials-after-bleaching-a-systematic-review
#3
REVIEW
Atiyeh Feiz, Hamid Mosleh, Rahman Nazeri
PURPOSE: The main objective of the present study was to make a systematic review of how antioxidant agents affect shear bond strength of tooth-colored restorative materials after bleaching. DATA SOURCES: Electronic search was used to extract the related articles on the targeted key words such as "antioxidant", "dental bleaching" and "shear bond strength" (SBS) from MeSH, PubMed, Medline, and Cochrane electronic data bases. These articles were all published before 2016...
March 10, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28327267/a-modified-nance-palatal-arch-for-the-treatment-of-ectopically-erupting-permanent-first-molars
#4
Fábio Lourenço Romano, Juliana Arid, Alexandra Mussolino de Queiroz, Raquel Assed Bezerra Segato, Paulo Nelson Filho
Permanent teeth that remain impacted could lead to the early loss of primary teeth and cause space problems in dental arches. We present two cases of ectopic eruption of the permanent maxillary first molars treated with soft distal movements using a modified Nance palatal arch (NPAm). The wire was soldered to the band and positioned distally to serve as support for the elastic chain, which was attached to a bonded button on the occlusal surface. After a few months, the ectopic eruption was corrected, preserving the adjacent primary teeth and restoring the occlusion...
September 15, 2016: Journal of Dentistry for Children
https://www.readbyqxmd.com/read/28318391/models-of-caries-formation-around-dental-composite-restorations
#5
J L Ferracane
The main reason cited for the replacement of dental composite restorations is the recurrence of caries. Numerous models-both in vitro, with acid gels or bacterial biofilms, and in situ, with dental appliances-have been used to study caries formation around dental composites. The literature shows that many factors may affect caries formation, including marginal gap formation, gap size, the local chemical environment, the durability of the bonded interface, the extent of bacterial penetration, and the presence of mechanical loading...
April 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28316952/interface-between-mta-and-dental-bonding-agents-scanning-electron-microscope-evaluation
#6
Gabriele Cervino, Luca Fiorillo, Gianrico Spagnuolo, Ennio Bramanti, Luigi Laino, Floriana Lauritano, Marco Cicciù
AIMS AND OBJECTIVES: Nowadays, the material that offers the best sealing characteristic in the field of endodontic treatment is the mineral trioxide aggregate (MTA), nevertheless, this material necessities an adhesive bonding agent to perfectly join to the dental surface. The aim of this study was to analyze using a scanning electron microscope (SEM) the possible microgap between the adhesive, MTA, and the dental surface. MATERIAL AND METHODS: Fourteen extracted molars were divided into two groups - group A was prepared with MTA-component adhesive and group B was prepared with MTA and composite dual etching...
January 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28315376/effect-of-a-novel-quaternary-ammonium-silane-cavity-disinfectant-on-durability-of-resin-dentine-bond
#7
D Umer, C K Y Yiu, M F Burrow, L-N Niu, F R Tay
OBJECTIVE: The present study examined the effect of a quaternary ammonium silane (QAS) cavity disinfectant on the viability of human dental pulp cells, dentine bond durability and nanoleakage of simplified etch-and-rinse adhesives. METHODS: Etched dentine surface of third molars were randomly divided into two adhesive groups, Adper™ Single Bond 2 and Prime & Bond(®) NT™. For each adhesive, the teeth were randomly assigned to five cavity disinfectant groups (N=6): Group 1: deionised water (control); Group 2: 2% chlorhexidine (CHX); Group 3: 2% QAS; Group 4: 5% QAS and Group 5: 10% QAS...
March 14, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28301024/comparison-of-cone-beam-computed-tomography-and-intraoral-radiography-in-detection-of-recurrent-caries-under-composite-restorations
#8
Shahin Kasraei, Abbas Shokri, Jalal Poorolajal, Samira Khajeh, Hamid Rahmani
Secondary caries is the most common cause of dental restoration failures. This study aimed to compare the diagnostic accuracy of conventional and digital intraoral radiography and cone beam computed tomography (CBCT) for detection of recurrent caries around composite restorations. mesio-occluso-distal (MOD) cavities were prepared using bur on 45 extracted sound human molar teeth. The teeth were divided into 3 groups. In the control group, cavities were restored with composite resin after etching and bonding (n=15)...
January 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/28298988/bond-strength-of-dental-nanocomposites-repaired-with-a-bulkfill-composite
#9
Uzay Koç-Vural, Leyla Kerimova, İsmail H Baltacioglu, Arlin Kiremitçi
BACKGROUND: The aim of this study was to analyze the bond strength of aged resin based nanocomposites repaired with the same and bulk fill composites. MATERIAL AND METHODS: Seventy-two disc shaped resin composites consisted of three different nanocomposite resins (Filtek Ultimate/FU, Herculite XRV Ultra/HXRV, and Reflectys/R) were produced. After storing the samples for 8 weeks in distilled water, each material was combined with the same material or the bulk-fill composite resin system (Filtek Ultimate+Filtek Ultimate/Group-1; Filtek Ultimate+Tetric BF/Group-2; Herculite XRV+Herculite XRV/Group-3; Herculite XRV+Tetric BF/ Group-4; Reflectys+Reflectys/Group 5; Reflectys+Tetric BF/Group-6), for repair...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28298987/effect-of-different-concentrations-of-specific-inhibitor-of-matrix-metalloproteinases-on-the-shear-bond-strength-of-self-adhesive-resin-cements-to-dentin
#10
Mohammad-Esmaeel Ebrahimi-Chaharom, Mehdi Abed-Kahnamoui, Mahmoud Bahari, Hamed Hamishehkar, Mahya Gharouni
BACKGROUND: Considering the probability of chemical and enzymatic reactions between matrix metalloproteinases (MMPs) in the dentin structure and their specific inhibitors, the aim of the present study was to evaluate the effect of different concentrations of specific inhibitor of MMPs (galardin) on the shear bond strength of self-adhesive resin cements to dentin. MATERIAL AND METHODS: Forty-eight sound human premolars were mounted in self-cured acrylic resin after removal of the enamel on the buccal and lingual surfaces...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28285545/to-reduce-the-maximum-stress-and-the-stress-shielding-effect-around-a-dental-implant-bone-interface-using-radial-functionally-graded-biomaterials
#11
H Asgharzadeh Shirazi, M R Ayatollahi, A Asnafi
In a dental implant system, the value of stress and its distribution plays a pivotal role on the strength, durability and life of the implant-bone system. A typical implant consists of a Titanium core and a thin layer of biocompatible material such as the hydroxyapatite. This coating has a wide range of clinical applications in orthopedics and dentistry due to its biocompatibility and bioactivity characteristics. Low bonding strength and sudden variation of mechanical properties between the coating and the metallic layers are the main disadvantages of such common implants...
March 13, 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28275801/-effects-of-double-transparent-pressure-diaphragm-transfer-tray-on-indirect-bonding
#12
Xiao-Hong Huang, Liang Xu, Shan Lin
PURPOSE: To compare the time-consuming and bonding effectiveness of full dental arch and segmented dental arch, when double transparent pressure diaphragm technology was used for indirect bracket bonding. METHODS: Forty-five orthodontic cases were selected, and classified into 3 groups according to different bonding methods and arches. There were 15 cases in each group, a total of 270 brackets and 120 buccal tubes were used. Patients in group A and B received double transparent pressure diaphragm technology to bond brackets indirectly...
December 2016: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/28269739/comparison-of-hexagonal-crystal-structures-between-fluorapatite-and-polytetrafluoroethylene
#13
REVIEW
Masayuki Okazaki
The crystallographic properties of fluorapatite (FAp) and polytetrafluoroethylene (PTFE) as biomedical materials were compared. Both materials contain fluorine and casually belong to the hexagonal crystal system. It is interesting that FAp is an inorganic ionic crystal, while PTFE is an organic covalent-bond crystal. Generally, fluorine contributes to the physicochemical stability and in some cases to the biocompatibility. The crystal structure of FAp was initially analyzed in 1930 by Náray-Szabó, although the analysis of hydroxyapatite (HAp) was markedly delayed until 1964...
2017: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/28257737/evaluation-of-enamel-surface-roughness-after-orthodontic-bracket-debonding-with-atomic-force-microscopy
#14
Shadi Mohebi, Hassan-Ali Shafiee, Nazila Ameli
INTRODUCTION: Achieving a smooth enamel surface after orthodontic bracket debonding is imperative. In this study, we sought to compare the enamel surface roughness values after orthodontic bracket debonding and resin removal using a white stone bur, a tungsten carbide bur, and a tungsten carbide bur under loupe magnification. METHODS: Thirty sound premolars were randomly divided into 3 groups, and their buccal surfaces were subjected to atomic force microscopy to measure initial surface roughness...
March 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28254287/surface-modification-of-quartz-fibres-for-dental-composites-through-a-sol-gel-process
#15
Yazi Wang, Renlin Wang, Eric Habib, Ruili Wang, Qinghong Zhang, Bin Sun, Meifang Zhu
In this study, quartz fibres (QFs) surface modification using a sol-gel method was proposed and dental posts reinforced with modified QFs were produced. A silica sol (SS) was prepared using tetraethoxysilane (TEOS) and 3-methacryloxypropyltrimethoxysilane (γ-MPS) as precursors. The amount of γ-MPS in the sol-gel system was varied from 0 to 24wt.% with a constant molar ratio of TEOS, ethanol, deionized water, and HCl. Thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), and contact angle (CA) measurements were used to characterize the modified QFs, which confirmed that SS had successfully coated the surface of QFs...
May 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28253073/does-low-level-laser-therapy-enhance-the-efficiency-of-orthodontic-dental-alignment-results-from-a-randomized-pilot-study
#16
Gianluigi Caccianiga, Alessio Paiusco, Letizia Perillo, Riccardo Nucera, Alberto Pinsino, Marcello Maddalone, Giancarlo Cordasco, Antonino Lo Giudice
OBJECTIVE: To assess if low-level laser therapy (LLLT) enhances the efficiency of orthodontic dental alignment. BACKGROUND: There is no evidence of the effect of LLLT on the orthodontic treatment time from randomized clinical trials. METHODS: Thirty-six subjects were included in this interventional pilot study and randomly assigned for treatment with fixed appliance and LLLT (test group) or with fixed appliance only (control group). A single monthly administration of LLLT was performed intraorally using a Diode laser (980 nm, 1 W, continuous wave, total energy density = 150 J/cm(2); Doctor Smile-Lambda Spa)...
March 2, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28245928/evaluation-of-dental-adhesive-systems-incorporating-an-antibacterial-monomer-eugenyl-methacrylate-egma-for-endodontic-restorations
#17
A Almaroof, S A Niazi, L Rojo, F Mannocci, S Deb
OBJECTIVE: The purpose of this study was to incorporate EgMA, an antibacterial monomer into two commercial dental adhesive systems for their application in endodontic restoration with the aim to disinfect the root canal space before curing and to inhibit bacterial growth on their surfaces after being cured. METHODS: EgMA monomer was added at 20%wt. into the formulation of the single-component self-etch, Clearfil Universal Bond™ (CUB) and into the catalyst and the adhesive components of the total-etch Adper Scotchbond-multipurpose™ (SBMP) adhesive systems...
February 25, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28230910/adhesives-for-bonded-molar-tubes-during-fixed-brace-treatment
#18
REVIEW
Declan T Millett, Nicky A Mandall, Rye Cr Mattick, Joy Hickman, Anne-Marie Glenny
BACKGROUND: Orthodontic treatment involves using fixed or removable appliances (dental braces) to correct the positions of teeth. The success of a fixed appliance depends partly on the metal attachments (brackets and bands) being glued to the teeth so that they do not become detached during treatment. Brackets (metal squares) are usually attached to teeth other than molars, where bands (metal rings that go round each tooth) are more commonly used. Orthodontic tubes (stainless steel tubes that allow wires to pass through them), are typically welded to bands but they may also be glued directly (bonded) to molars...
February 23, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28228165/determining-optimal-fluorescent-agent-concentrations-in-dental-adhesive-resins-for-imaging-the-tooth-restoration-interface
#19
Odair Bim Júnior, Marco A Cebim, Maria T Atta, Camila M Machado, Luciana F Francisconi-Dos-Rios, Linda Wang
Fluorescent dyes like Rhodamine B (RB) have been used to identify the spatial distribution of adhesive restorative materials in the tooth/restoration interface. Potential effects of the addition of RB to dental adhesives were addressed in the past, but no further information is available on how to determine suitable concentrations of RB in these bonding agents for imaging in the confocal laser scanning microscope. This study provides systematical strategies for adding RB to viscous dental adhesive resins, focusing on the determination of the lowest range of dye concentrations necessary to achieve an acceptable image of the dentin/adhesive interface...
February 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/28222907/fatigue-testing-of-biomaterials-and-their-interfaces
#20
Dwayne Arola
OBJECTIVE: The objective of this article is to describe the importance of fatigue to the success of restorative dentistry, with emphasis on the methods for evaluating the fatigue properties of materials in this field, and the durability of their bonded interfaces. METHODS: The stress-life fatigue and fatigue crack growth approaches for evaluating the fatigue resistance of dental biomaterials are introduced. Emphasis is placed on in vitro studies of the hard tissue foundation, restorative materials and their bonded interfaces...
February 17, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
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