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Dental bonding

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https://www.readbyqxmd.com/read/28545818/boron-nitride-nanotubes-as-novel-fillers-for-improving-the-properties-of-dental-adhesives
#1
Felipe Weidenbach Degrazia, Vicente Castelo Branco Leitune, Susana Maria Werner Samuel, Fabrício Mezzomo Collares
OBJECTIVE: This study aimed to evaluate the physical-chemical properties of experimental dental adhesives containing boron nitride nanotubes (BNNTs) as inorganic fillers. METHODS: An experimental adhesive resin was prepared using HEMA-BisGMA, 66/33 wt% (control). Inorganic BNNT fillers were first analyzed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) and then incorporated into the adhesive at different concentration (0.05, 0...
May 22, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28536026/nanochitosan-modified-glass-ionomer-cement-with-enhanced-mechanical-properties-and-fluoride-release
#2
R Senthil Kumar, N Ravikumar, S Kavitha, S Mahalaxmi, R Jayasree, T S Sampath Kumar, M Haneesh
Conventional glass-ionomer cements (GIC) are one of the most prevalent dental restorative materials, but their use is limited by their relatively low mechanical strength. Efforts have been made to improve the mechanical properties by addition of various fillers of which nano-sized particles appears to be a promising strategy. In the current study, effect of addition of nanochitosan particles in GIC (NCH-GIC) on compressive strength, flexural strength, wear resistance and fluoride release has been evaluated and compared with conventional GIC (C-GIC)...
May 20, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28535954/sol-gel-derived-bioactive-glass-nanoparticle-incorporated-glass-ionomer-cement-with-or-without-chitosan-for-enhanced-mechanical-and-biomineralization-properties
#3
Dong-Ae Kim, Jung-Hwan Lee, Soo-Kyung Jun, Hae-Won Kim, Mohamed Eltohamy, Hae-Hyoung Lee
OBJECTIVE: This study investigated the mechanical and in vitro biological properties (in immortalized human dental pulp stem cells (ihDPSCs)) of bioactive glass nanoparticle (BGN)-incorporated glass ionomer cement (GIC) with or without chitosan as a binder. METHODS: After the BGNs were synthesized and characterized, three experimental GICs and a control (conventional GIC) that differed in the additive incorporated into a commercial GIC liquid (Hy-bond, Shofu, Japan) were produced: BG5 (5wt% of BGNs), CL0...
May 20, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28535395/a-zinc-chloride-doped-adhesive-facilitates-sealing-at-the-dentin-interface-a-confocal-laser-microscopy-study
#4
Manuel Toledano, Raquel Osorio, Estrella Osorio, Inmaculada Cabello, Manuel Toledano-Osorio, Fátima S Aguilera
The aim of this study was to ascertain the effect of Zn-doping of dental adhesives and mechanical load cycling on the micromorphology of the resin-dentin interdiffusion zone (of sound and caries affected dentin). The investigation considered two different Zn-doped adhesive approaches and evaluated the interface using a doubled dye fluorescent technique and a calcium chelator fluorophore under a confocal laser scanning microscopy. Sound and carious dentin-resin interfaces of unloaded specimens were deficiently resin-hybridized, in general...
May 19, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28533015/in%C3%A2-vitro-comparison-of-the-load-bearing-capacity-of-ceramic-and-metal-ceramic-resin-bonded-fixed-dental-prostheses-in-the-posterior-region
#5
Wolfgang Bömicke, Moritz Waldecker, Johannes Krisam, Peter Rammelsberg, Stefan Rues
STATEMENT OF PROBLEM: The clinical use of ceramic resin-bonded fixed dental prostheses (RBFDPs) in the posterior region is desirable for esthetic and biological reasons but has been associated with many technical problems, including fractures or chipping of the veneer. Although these problems may be overcome by using monolithic zirconia, information is lacking about the load-bearing capacity of resin-bonded monolithic zirconia restorations for replacing a molar. PURPOSE: The purpose of this in vitro study was to compare the load-bearing capacity (Fu), the load at initial damage (F1d), and the failure pattern of posterior RBFDPs fabricated from monolithic zirconia (MZr), veneered zirconia (VZr), and veneered cobalt-chromium (VCo)...
May 20, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28530844/developing-a-new-generation-of-antimicrobial-and-bioactive-dental-resins
#6
L Cheng, K Zhang, N Zhang, M A S Melo, M D Weir, X D Zhou, Y X Bai, M A Reynolds, H H K Xu
Dental caries is prevalent, and secondary caries causes restoration failures. This article reviews recent studies on developing a new generation of bioactive resins with anticaries properties. Extensive effects were made to develop new antimicrobial composites, bonding agents, and other resins containing quaternary ammonium methacrylates to suppress plaque buildup and bacterial acid production. The effects of alkyl chain length and charge density and the antimicrobial mechanisms for chlorhexidine, nano-silver, quaternary ammonium methacrylates, and protein-repellent agents were discussed...
May 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28528931/evaluation-of-alternative-monomers-to-hema-for-dental-applications
#7
Sven Tauscher, Jörg Angermann, Yohann Catel, Norbert Moszner
OBJECTIVE: The objective of this work is to find potential alternative monomers to 2-hydroxyethyl methacrylate (HEMA) for dental materials (self-etch adhesives and luting composites). METHODS: Monomers 1-9 were tested as potential HEMA substitutes. Methacrylates 4, 5 and 6 and (N-methyl)acrylamides 7-9 were synthesized and characterized by (1)H NMR spectroscopy. The reactivity of each monomer was studied using photo-DSC. Mixtures of monomers 1-9 with the urethane dimethacrylate UDMA (1/1: wt/wt) were formulated and cured...
May 18, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28513977/use-of-high-performance-polymers-as-dental-implant-abutments-and-frameworks-a-case-series-report
#8
Mohammad Al-Rabab'ah, Wala'a Hamadneh, Ismail Alsalem, Ameen Khraisat, Ashraf Abu Karaky
Dental implant abutments can be made of different materials including titanium, gold, zirconia, alumina, and polymeric materials. Polyetheretherketone (PEEK) is a high performance thermoplastic polymer that can be used as a dental implant abutment material. It has an elastic modulus comparable to bone and can reduce stress shielding. PEEK is a radiolucent material that can allow better radiographic imaging of peri-implant tissues and can be veneered with composite materials or bonded to ceramics. PEEK is widely used in orthopedic and spinal surgeries, and it possesses mechanical and biological characteristics that encourage its use as dental implant abutments...
May 17, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28513133/antibacterial-property-of-a-polyethylene-glycol-grafted-dental-material
#9
Liying Peng, Li Chang, Xi Liu, Jiuxiang Lin, Hongliang Liu, Bing Han, Shutao Wang
Dental materials often cause bacterial adhesion and promote bacterial biofilm formation, which brings a series of long-standing and significant problems in oral health. However, the current development of antibacterial research in dental devices is limited by the lack of materials endowed with good antibacterial properties against oral bacteria. Here, we present a new strategy for reducing the initial adhesion of bacterial on dental biomaterials by chemically bonding long-chain polyethylene glycol. Our work represents an important step toward solving the problem of bacterial accumulation on dental devices...
May 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28512491/pulp-response-following-direct-pulp-capping-with-dentin-adhesives-and-mineral-trioxide-aggregate-an-animal-study
#10
Ali Akhavan, Farahnaz Arbabzadeh, Majid Bouzari, Sayed Mohammad Razavi, Amin Davoudi
INTRODUCTION: Pulp vitality and its continuous dentin prodution are essential for long-term success of direct pulp capping (DPC). The aim of present study was to evaluate the histopathological response of the canine pulp following DPC using either different dentin adhesive resins (DAR), calcium hydroxide (CH) or mineral trioxide aggregate (MTA). METHODS AND MATERIALS: DPC was done on 72 dog's teeth using 6 types of dental materials (n=12) (4 types of DAR, white MTA and CH)...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28506608/plga-nanoparticles-as-chlorhexidine-delivery-carrier-to-resin-dentin-adhesive-interface
#11
Balasankar Meera Priyadarshini, Kakran Mitali, Thong Beng Lu, Harish K Handral, Nileshkumar Dubey, Amr S Fawzy
OBJECTIVE: To characterize and deliver fabricated CHX-loaded PLGA-nanoparticles inside micron-sized dentinal-tubules of demineralized dentin-substrates and resin-dentin interface. METHODS: Nanoparticles fabricated by emulsion evaporation were assessed in-vitro by different techniques. Delivery of drug-loaded nanoparticles to demineralized dentin substrates, interaction with collagen matrix, and ex-vivo CHX-release profiles using extracted teeth connected to experimental setup simulating pulpal hydrostatic pressure were investigated...
May 12, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28503478/the-effects-of-non-thermal-plasma-and-conventional-treatments-on-the-bond-strength-of-fiber-posts-to-resin-cement
#12
Maíra do Prado, Eduardo Moreira da Silva, Juliana das Neves Marques, Caroline Brum Gonzalez, Renata Antoun Simão
OBJECTIVES: This study compared the effect of hexamethyldisiloxane (HMDSO) and ammonia (NH3) plasmas on the bond strength of resin cement to fiber posts with conventional treatments. MATERIALS AND METHODS: Sixty-five fiber posts were divided into 5 groups: Control (no surface treatment); H2O2 (24% hydrogen peroxide for 1 min); Blasting (blasting with aluminum oxide for 30 sec); NH3 (NH3 plasma treatment for 3 min); HMDSO (HMDSO plasma treatment for 15 min). After the treatments, the Ambar adhesive (FGM Dental Products) was applied to the post surface (n = 10)...
May 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/28499631/extrafibrillar-collagen-demineralization-based-chelate-and-rinse-technique-bridges-the-gap-between-wet-and-dry-dentin-bonding
#13
Sui Mai, Chin-Chuan Wei, Li-Sha Gu, Fu-Cong Tian, Dwayne D Arola, Ji-Hua Chen, Yang Jiao, David H Pashley, Li-Na Niu, Franklin R Tay
Limitations associated with wet-bonding led to the recent development of a selective demineralization strategy in which dentin was etched with a reduced concentration of phosphoric acid to create exclusive extrafibrillar demineralization of the collagen matrix. However, the use of acidic conditioners removes calcium via diffusion of very small hydronium ions into the intrafibrillar collagen water compartments. This defeats the purpose of limiting the conditioner to the extrafibrillar space to create a collagen matrix containing only intrafibrillar minerals to prevent collapse of the collagen matrix...
May 9, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28482568/enhanced-antifungal-activity-by-disinfected-titanium-dioxide-nanotubes-via-reduced-nano-adhesion-bonds
#14
Ernesto Beltrán-Partida, Benjamín Valdez-Salas, Mario Curiel-Álvarez, Sandra Castillo-Uribe, Alan Escamilla, Nicola Nedev
We have provided evidence that the beneficial effect of super-oxidized water (SOW) disinfected Ti6Al4V-TiO2 nanotubes (NTs) can reduce bacterial adhesion and biofilm formation. However, the need of antifungal nanostructured surfaces with osteoactive capabilities is an important goal that has been arising for dental implants (DI) applications. Thus, in the present study we isolated and tested the effects of Candida albicans (C. albicans) on disinfected, wetter and nanoroughness NTs compared to a non-modified control...
July 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28470622/green-synthesis-and-characterization-of-ag-nanoparticles-from-mangifera-indica-leaves-for-dental-restoration-and-antibacterial-applications
#15
Dola Sundeep, T Vijaya Kumar, P S Subba Rao, R V S S N Ravikumar, A Gopala Krishna
Green synthesis has gained a wide recognition as clean synthesis technique in the recent years. In the present investigation, silver nanoparticles were prepared by a novel green synthesis technique using Mangifera indica (Mango leaves) and found to be successfully used in dental applications. The prepared samples were spectroscopically characterized by XRD, PSA, SEM with EDS, and UV-Vis spectroscopy. The crystalline size and lattice strain were analyzed from the XRD data which were counter-verified by W-H plots and particle size analyzer...
May 3, 2017: Progress in biomaterials
https://www.readbyqxmd.com/read/28469824/traction-test-of-temporary-dental-cements
#16
Juan-Luis Román-Rodríguez, Diego Millan-Martínez, Antonio Fons-Font, Rubén Agustín-Panadero, Lucía Fernández-Estevan
BACKGROUND: Classic self-curing temporary cements obstruct the translucence of provisional restorations. New dual-cure esthetic temporary cements need investigation and comparison with classic cements to ensure that they are equally retentive and provide adequate translucence. The objective is to analyze by means of traction testing in a in vitro study the retention of five temporary cements. MATERIAL AND METHODS: Ten molars were prepared and ten provisional resin restorations were fabricated using CAD-CAM technology (n=10)...
April 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28463409/sol-gel-graphene-based-fabric-phase-sorptive-extraction-for-cow-and-human-breast-milk-sample-cleanup-for-screening-bisphenol-a-and-residual-dental-restorative-material-before-analysis-by-hplc-with-diode-array-detection
#17
Victoria Samanidou, Olga Filippou, Eirini Marinou, Abuzar Kabir, Kenneth G Furton
Fabric-phase sorptive extraction has already been recognized as a simple and green alternative to the conventional sorbent-based sorptive microextraction techniques, using hybrid organic-inorganic sorbent coatings chemically bonded to a flexible fabric surface. Herein, we have investigated the synergistic combination of the advanced material properties offered by sol-gel graphene sorbent and the simplicity of Fabric phase sorptive extraction approach in selectively extracting bisphenol A and residual monomers including bisphenol A glycerolatedimethacrylate, urethane dimethacrylate and triethylene glycol dimethacrylate derived dental restorative materials from cow and human breast milk samples...
April 30, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28459243/nanotechnology-in-dentistry-clinical-applications-benefits-and-hazards
#18
Govind Shashirekha, Amit Jena, Satyajit Mohapatra
Nanotechnology is emerging as an interdisciplinary field that is undergoing rapid development and has brought about enormous changes in medicine and dentistry. Nanomaterial-based design is able to mimic some of the mechanical and structural properties of native tissue and can promote biointegration. Nanotechnology has various applications in dentistry, including dentition renaturalization, therapy for dentin hypersensitivity, complete orthodontic realignment in a single visit, covalently bonding diamondized enamel, enhancing properties of root canal sealers, and continuous oral health maintenance using mechanical dentifrobots...
May 2017: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/28457273/addition-of-ammonium-based-methacrylates-to-an-experimental-dental-adhesive-for-bonding-metal-brackets-carious-lesion-development-and-bond-strength-after-cariogenic-challenge
#19
Patrícia Layane de Menezes Macedo Nascimento, Carine Tais Welter Meereis, Tamires Timm Maske, Fabrício Aulo Ogliari, Maximiliano Sérgio Cenci, Carmem Sílvia Pfeifer, André Luis Faria-E-Silva
INTRODUCTION: In this study, we evaluated the caries inhibition and shear bond strength achieved with the addition of the antibacterial monomer [2-(Methacryloyloxy)ethyl] trimethylammonium chloride (MADQUAT) to an adhesive used to bond orthodontic brackets. METHODS: Experimental adhesives were formulated with addition of 0% (control), 5%, or 10% MADQUAT followed by measurement of the degree of conversion. These adhesives were used to lute brackets to the enamel of premolars (n = 30)...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28435381/complications-in-implant-dentistry
#20
REVIEW
Ayesha Hanif, Saima Qureshi, Zeeshan Sheikh, Haroon Rashid
After tooth loss, an individual may seek tooth replacement so that his/her function and esthetics could be restored. Clinical prosthodontics, during the past decade, has significantly improved and developed according to the advancements in the science and patient's demands and needs. Conventional options in prosthodontics for substituting a missing single tooth include the removable partial denture, partial and full coverage bridgework, and resin-bonded bridgework. Dental implants have gained increasing popularity over the years as they are capable of restoring the function to near normal in both partial and completely edentulous arches...
January 2017: European Journal of Dentistry
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