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https://www.readbyqxmd.com/read/28808637/effects-of-air-abrasion-pressure-on-the-resin-bond-strength-to-zirconia-a-combined-cyclic-loading-and-thermocycling-aging-study
#1
Eman Z Al-Shehri, Afnan O Al-Zain, Alaa H Sabrah, Sarah S Al-Angari, Laila Al Dehailan, George J Eckert, Mutlu Özcan, Jeffrey A Platt, Marco C Bottino
OBJECTIVES: To determine the combined effect of fatigue cyclic loading and thermocycling (CLTC) on the shear bond strength (SBS) of a resin cement to zirconia surfaces that were previously air-abraded with aluminum oxide (Al2O3) particles at different pressures. MATERIALS AND METHODS: Seventy-two cuboid zirconia specimens were prepared and randomly assigned to 3 groups according to the air-abrasion pressures (1, 2, and 2.8 bar), and each group was further divided into 2 groups depending on aging parameters (n = 12)...
August 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/28806427/fixed-dental-prostheses-and-single-tooth-crowns-based-on-ceria-stabilized-tetragonal-zirconia-alumina-nanocomposite-frameworks-outcome-after-2-years-in-a-clinical-trial
#2
Fabian Hüttig, Jan P Keitel, Andreas Prutscher, Sebastian Spintzyk, Andrea Klink
PURPOSE: This clinical trial tested bilayered restorations based on ceria-stabilized tetragonal zirconia/alumina frameworks veneered with feldspathic ceramic. MATERIALS AND METHODS: A total of 67 crowns and 40 fixed dental prostheses (FDPs) were luted in 57 patients with self-etching/self-adhesive composite resin cement. Dental status and integrity of restorations were evaluated at 2 weeks, 6 months, and then annually. RESULTS: A total of 66 crowns and 36 FDPs (88% posterior) survived for success rates of 93...
August 14, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/28806426/comparative-evaluation-of-the-effect-of-laser-etching-on-the-shear-bond-strength-of-crowns-cemented-with-two-different-luting-agents-an-in-vitro-study
#3
Ankur Dahiya, Paresh Gandhi, Nadim Z Baba
PURPOSE: The aim of this study was to compare the shear bond strength of crowns cemented on natural teeth after surface treatment of the enamel with an erbium-doped yttrium aluminum garnet (Er:YAG) laser. MATERIALS AND METHODS: Crown preparation was done for 40 full-metal crowns, and wax patterns with loops were cast in a cobalt-chromium alloy. The Er:YAG laser was used for surface treatment of some teeth, and teeth without surface treatment acted as the control...
August 14, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/28797747/metal-composite-adhesion-based-on-diazonium-chemistry
#4
Yara Oweis, Omar Alageel, Paige Kozak, Mohamed-Nur Abdallah, Jean-Marc Retrouvey, Marta Cerruti, Faleh Tamimi
OBJECTIVE: Composite resins do not adhere well to dental alloys. This weak bond can result in failure at the composite-metal interface in fixed dental prostheses and orthodontic brackets. The aim of this study was to develop a new adhesive, based on diazonium chemistry, to facilitate chemical bonding between dental alloys and composite resin. METHODS: Samples of two types of dental alloys, stainless steel and cobalt chromium were primed with a diazonium layer in order to create a surface coating favorable for composite adhesion...
August 7, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28783130/shear-bond-strength-and-remineralisation-effect-of-a-casein-phosphopeptide-amorphous-calcium-phosphate-modified-glass-ionomer-cement-on-artificial-caries-affected-dentine
#5
Irene Shuping Zhao, May Lei Mei, Zhuo Long Zhou, Michael Francis Burrow, Edward Chin-Man Lo, Chun-Hung Chu
This study investigated the effect of casein phosphopeptide-amorphous calcium phosphate (CPP-ACP)-modified glass ionomer cement (GIC) on shear bond strength (SBS) and remineralisation of artificial "caries-affected" dentine. Human dentine slices were demineralised and allocated to three groups: group 1, conventional GIC; group 2, CPP-ACP-modified GIC; and group 3, resin-modified GIC. The SBS was measured using a universal testing machine (n = 16 per group). Remaining samples (n = 8 per group) were subjected to pH-cycling for 28 days...
August 7, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28782855/effect-of-maleic-acid-on-the-bond-strength-of-fibre-posts-to-root-dentine
#6
Fan Fan, Muhammad Ibrahim, Panpan Dai, Yixin Mao, Bing He, Gang Wu, Jianfeng Ma, Shengbin Huang
The aim of this study was to evaluate the effect of maleic acid (MA) on both the bond strength of fibre post to root dentine and smear layer removal after post space preparation. Sixty, single-canal premolars were endodontically treated and randomly assigned to four groups: group 1 [0.9% saline solution (control]); group 2 [2.5% sodium hypochlorite (NaOCl)]; group 3 [17% ethylenediaminetetraacetic acid (EDTA) followed by 2.5% NaOCl]; and group 4 (7% MA followed by 2.5% NaOCl). Self-adhesive resin cement was used to test the adhesion of a glass-fibre post to the root dentine through a micropush-out test...
August 7, 2017: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/28780718/clinical-and-radiographic-comparison-of-biodentine-mineral-trioxide-aggregate-and-formocresol-as-pulpotomy-agents-in-primary-molars
#7
P Juneja, S Kulkarni
AIM: To compare the clinical and radiographic success rates of three different pulpotomy agents in primary molars after 18 months. METHODS: The study was carried out with 51 primary molars of children aged 5-9 years old. The teeth were randomly assigned to the experimental or control groups. After coronal pulp removal and haemostasis, the remaining pulp tissue was covered with Biodentine(®) or mineral trioxide aggregate in the experimental groups. In the control group, formocresol was placed with a cotton pellet over the pulp tissue for 5 min and after removal the pulp tissue was covered with zinc oxide-eugenol (ZOE) paste...
August 5, 2017: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/28772660/the-effect-of-different-storage-media-on-color-stability-of-self-adhesive-composite-resin-cements-for-up-to-one-year
#8
Anja Liebermann, Malgorzata Roos, Bogna Stawarczyk
The aim of this study was to analyze the long-term color stability of eight self-adhesive composite resin cements (SACRCs) after storage in diverse media for up to one year. 480 discs (diameter: 12 mm/thickness: 1.0 ± 0.05 mm) were fabricated (n = 60/SACRC): (1) BeautyCem (BEA); (2) Bifix SE (BIF); (3) Clearfil SA Cement Automix (CLE); (4) RelyX Unicem 2 Automix (RXU); (5) SeT (SET); (6) SmartCem 2 (SMC); (7) SoloCem (SOC); and (8) SpeedCEM (SPC). After polishing, specimens were immersed in (a) red wine (RW); (b) curry-solution (CU); (c) cress-solution (CR); and (d) distilled water (DW) at 37 °C and measured after 7, 28, 90, 180, and 365 days for color differences (ΔE) and water absorption (WA)...
March 16, 2017: Materials
https://www.readbyqxmd.com/read/28772602/wear-behavior-of-ceramic-cad-cam-crowns-and-natural-antagonists
#9
Ella A Naumova, Stephan Schneider, Wolfgang H Arnold, Andree Piwowarczyk
OBJECTIVE: Evaluation of wear behavior of computer-aided design/computer-aided manufacturing (CAD/CAM) crowns from various restorative materials and natural antagonists. METHOD: Full CAD/CAM crowns fabricated with nanoceramic resin (Lava Ultimate (LU)), a glass ceramic in a resin interpenetrating matrix (Vita Enamic (VE)) and a lithium silicate reinforced ceramic enriched with zirconia (Vita Suprinity (VS)) were cemented on human molars. The crown and antagonists were subjected to simulated chewing...
February 28, 2017: Materials
https://www.readbyqxmd.com/read/28772508/shear-bond-strength-of-al%C3%A2-o%C3%A2-sandblasted-y-tzp-ceramic-to-the-orthodontic-metal-bracket
#10
Seon Mi Byeon, Min Ho Lee, Tae Sung Bae
As the proportion of adult orthodontic treatment increases, mainly for aesthetic reasons, orthodontic brackets are directly attached to yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) restorations. This, study analyzed the shear bond strength (SBS) between various surface treated Y-TZP and orthodontic metal brackets. The Y-TZP specimens were conditioned by 110 μm Al₂O₃ sandblasting, or sandblasting followed by coating with one of the primers (silane, MDP, or an MDP-containing silane primer). After surface treatment, the orthodontic metal bracket was bonded to the specimen using a resin cement, and then 24 h storage in water and thermal cycling (5000 cycles, 5-55 °C), SBS was measured...
February 9, 2017: Materials
https://www.readbyqxmd.com/read/28772489/influence-of-curing-mode-on-the-surface-energy-and-sorption-solubility-of-dental-self-adhesive-resin-cements
#11
Hyun-Jin Kim, Rafat Bagheri, Young Kyung Kim, Jun Sik Son, Tae-Yub Kwon
This study investigated the influence of curing mode (dual- or self-cure) on the surface energy and sorption/solubility of four self-adhesive resin cements (SARCs) and one conventional resin cement. The degree of conversion (DC) and surface energy parameters including degree of hydrophilicity (DH) were determined using Fourier transform infrared spectroscopy and contact angle measurements, respectively (n = 5). Sorption and solubility were assessed by mass gain or loss after storage in distilled water or lactic acid for 60 days (n = 5)...
February 4, 2017: Materials
https://www.readbyqxmd.com/read/28768230/thermal-stress-analysis-of-ceramic-laminate-veneer-restorations-with-different-incisal-preparations-using-micro-computed-tomography-based-3d-finite-element-models
#12
Alper Tunga Celebi, Esra Icer, Meltem Mert Eren, Cengiz Baykasoglu, Ata Mugan, Esra Yildiz
Main objective of this study is to investigate the thermal behavior of ceramic laminate veneer restorations of the maxillary central incisor with different incisal preparations such as butt joint and palatinal chamfer using finite element method. In addition, it is also aimed to understand the effect of different thermal loads which simulates hot and cold liquid imbibing in the mouth. Three-dimensional solid models of the sound tooth and prepared veneer restorations were obtained using micro-computed tomography images...
July 27, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28762350/comparative-evaluation-of-microleakage-between-bulk-esthetic-materials-versus-resin-modified-glass-ionomer-to-restore-class-ii-cavities-in-primary-molars
#13
Vellore Kannan Gopinath
AIM: The aim of the study was to assess the microleakage of one high-viscosity conventional glass ionomer cement (GIC) and a bulk-fill composite resin, in comparison to a resin-modified GIC in Class II restorations in primary molars. MATERIALS AND METHOD: Standardized Class II slot cavity preparations were prepared in exfoliating primary molars. Teeth were restored using one of the three materials tested (n = 10): SonicFill bulk-fill composite resin (SF), EQUIA Fil conventional reinforced GIC (EQF), and Vitremer resin-reinforced GIC (VT)...
July 2017: Journal of the Indian Society of Pedodontics and Preventive Dentistry
https://www.readbyqxmd.com/read/28759777/color-stability-of-dental-restorative-materials-submitted-to-cold-temperatures-for-forensic-purposes
#14
Roberto Cesar Biancalana, Sergio Augusto Freitas Vincenti, Ricardo Henrique Alves da Silva, Fernanda Carvalho Panzeri Pires-de-Souza
In the post-mortem examination of the dental arches of accident victims in cold locations, dental restorative materials can be found. Cold temperatures can be capable of causing color changes of aesthetic materials, such as composite resin (CR) and glass ionomer cement (GIC). The aim of this study was to evaluate the effect of the cold action on the color stability of CR and GIC restorations, in order to discriminate them and enable the adequate comparison between antemortem and post-mortem data. Sixty bovine teeth (30 CR and 30 GIC) were prepared (6 × 6 × 2 mm) and separated into groups (n = 10)...
July 25, 2017: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/28756865/influence-of-remaining-coronal-tooth-structure-on-fracture-resistance-and-failure-mode-of-restored-endodontically-treated-maxillary-incisors
#15
Domingo Santos Pantaleón, Brian R Morrow, David R Cagna, Cornelis H Pameijer, Franklin Garcia-Godoy
STATEMENT OF PROBLEM: Limited information is available on the effect of an incomplete ferrule because of the varying residual axial wall heights and the volume of residual tooth structure on the fracture resistance of endodontically treated and restored maxillary incisors. PURPOSE: The purpose of this in vitro investigation was to examine the effect of varying residual axial wall heights, residual coronal tooth structure, and the absence of 1 proximal axial wall on the fracture resistance and failure mode of endodontically treated teeth restored with metal posts...
July 27, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28752095/a-deep-morphological-characterization-and-comparison-of-different-dental-restorative-materials
#16
R Condò, L Cerroni, G Pasquantonio, M Mancini, A Pecora, A Convertino, V Mussi, A Rinaldi, L Maiolo
Giomer is a relatively new class of restorative material with aesthetics, handling and physical properties of composite resins, and benefits of glass ionomers: high radiopacity, antiplaque effect, fluoride release, and recharge. To verify the superior properties of Giomers, in this study, a deep morphological characterization has been performed with an in vitro comparative study among a Giomer (Beautifil® II by Shofu Dental Corporation, Osaka, Japan), a Compomer (Dyract Extra by Dentsply, Caulk, Germany), glass ionomer cement (Ketac fil plus by 3M ESPE), and a composite resin (Tetric Evoceram by Ivoclar)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28751918/cellular-responses-in-human-dental-pulp-stem-cells-treated-with-three-endodontic-materials
#17
Alejandro Victoria-Escandell, José Santiago Ibañez-Cabellos, Sergio Bañuls-Sánchez de Cutanda, Ester Berenguer-Pascual, Jesús Beltrán-García, Eva García-López, Federico V Pallardó, José Luis García-Giménez, Antonio Pallarés-Sabater, Ignacio Zarzosa-López, Manuel Monterde
Human dental pulp stem cells (HDPSCs) are of special relevance in future regenerative dental therapies. Characterizing cytotoxicity and genotoxicity produced by endodontic materials is required to evaluate the potential for regeneration of injured tissues in future strategies combining regenerative and root canal therapies. This study explores the cytotoxicity and genotoxicity mediated by oxidative stress of three endodontic materials that are widely used on HDPSCs: a mineral trioxide aggregate (MTA-Angelus white), an epoxy resin sealant (AH-Plus cement), and an MTA-based cement sealer (MTA-Fillapex)...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28750778/delayed-photo-activation-and-addition-of-thio-urethane-impact-on-polymerization-kinetics-and-stress-of-dual-cured-resin-cements
#18
André L Faria-E-Silva, Carmem S Pfeifer
OBJECTIVE: 1) to determine the moment during the redox polymerization reaction of dual cure cements at which to photo-activate the material in order to reduce the polymerization stress, and 2) to evaluate possible synergistic effects between adding chain transfer agents and delayed photo-activation. METHODS: The two pastes of an experimental dual-cure material were mixed, and the polymerization kinetics of the redox phase was followed. The moment when the material reached its maximum rate of redox polymerization (MRRP) of cement was determined...
July 25, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28748270/color-difference-of-composite-resins-after-cementation-with-different-shades-of-resin-luting-cement
#19
Esra Cengiz, Sevcan Kurtulmus-Yilmaz, Izgen Karakaya, Huseyin Aktore
The purpose of this study was to evaluate the color difference of nanohybrid and ormocer-based composite resins with different thicknesses when 4 different shades of resin luting cement were used. 56 disc specimens of each composite resin (Aelite aesthetic enamel, Ceram-X mono) with 0.5 and 1 mm thicknesses were fabricated. Baseline color measurements were performed using a clinical spectrophotometer. The specimens of each thicknesses of each resin were randomly divided into 4 groups according to the shades of resin luting cement (white/A1, yellow/universal/A3, transparent and white opaque) (n = 7)...
July 26, 2017: Odontology
https://www.readbyqxmd.com/read/28741292/effect-of-mdp-based-silane-and-different-surface-conditioner-methods-on-bonding-of-resin-cements-to-zirconium-framework
#20
Hatice Özdemir, Nuran Yanikoğlu, Nurdan Sağsöz
PURPOSE: To determine the shear bond strength (SBS) between zirconium framework and resin cements after different surface conditioner methods and after application of 10-methacryloyloxydecyl dihydrogen phosphate (MDP) based silane and a bonding agent mix. MATERIALS AND METHODS: 128 disc-shaped zirconium-oxide specimens were prepared. Specimens were placed in autopolymerizing acrylic resin. The bonding surface of specimens was smoothed consecutively with 600-, 800-, and 1200-grit silicon carbide papers under water cooling...
July 24, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
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