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Dental Materials: Official Publication of the Academy of Dental Materials

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https://www.readbyqxmd.com/read/28720333/bioactivity-and-properties-of-a-dental-adhesive-functionalized-with-polyhedral-oligomeric-silsesquioxanes-poss-and-bioactive-glass
#1
Marta Rizk, Lisa Hohlfeld, Loan Tao Thanh, Ralf Biehl, Nicole Lühmann, Dirk Mohn, Annette Wiegand
OBJECTIVES: This study aimed to analyze the effect of infiltrating a commercial adhesive with nanosized bioactive glass (BG-Bi) particles or methacryl-functionalized polyhedral oligomeric silsesquioxanes (POSS) on material properties and bioactivity. METHODS: An acetone-based dental adhesive (Solobond Plus adhesive, VOCO GmbH, Cuxhaven, Germany) was infiltrated with nanosized bioactive glass particles (0.1 or 1wt%), or with monofunctional or multifunctional POSS particles (10 or 20wt%)...
July 15, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28712740/aspects-of-adhesion-tests-on-resin-glass-ceramic-bonding
#2
Andrew Chi Ho Wong, Tian Tian, James Kit Hon Tsoi, Michael Francis Burrow, Jukka Pekka Matinlinna
OBJECTIVES: This study aimed to compare and contrast two resin-ceramic bond strength tests, the tensile bond strength and the four-point bending tests. The effects of hydrofluoric acid (HF) etching time and storage condition on bond strength were also studied. METHODS: Ceramic beams (N=480) with the dimensions of 2.00×2.00×12.45mm(3) were sectioned from lithium disilicate ceramic ingots (IPS e.max CAD), then polished and fired for final crystallization. The joint surfaces were etched with HF gel (IPS Ceramic etching gel) for 20s, 40s, or 60s of each group (n=160)...
July 13, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28712739/biocompatibility-and-bond-degradation-of-poly-acrylic-acid-coated-copper-iodide-adhesives
#3
Adi ALGhanem, Gabriela Fernandes, Michelle Visser, Rosemary Dziak, Walter G Renné, Camila Sabatini
OBJECTIVE: To investigate the effect of poly-acrylic acid (PAA) copper iodide (CuI) adhesives on bond degradation, tensile strength, and biocompatibility. METHODS: PAA-CuI particles were incorporated into Optibond XTR, Optibond Solo and XP Bond in 0.1 and 0.5mg/ml. Clearfil SE Protect, an MDPB-containing adhesive, was used as control. The adhesives were applied to human dentin, polymerized and restored with composite in 2mm-increments. Resin-dentin beams (0.9±0...
July 13, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28701262/effects-of-low-dose-bisphenol-a-on-calcium-ion-influx-and-on-genes-of-proliferation-and-differentiation-in-immortalized-human-gingival-cells-in-vitro-the-role-of-estrogen-receptor-beta
#4
Matthias Ehrenmann, Pascal Tomakidi, Elmar Hellwig, Simon Daniel Schulz, Olga Polydorou
OBJECTIVES: Relating to low-dose Bisphenol-A (BPA), there is still a lack of mechanistic studies in oral cells, representing the first targets of BPA by oral intake. The objective of this study was to investigate an assumed mechanistic interrelationship between both low-dose BPA-modulated Calcium ion (Ca(2+)) influx and cell behavior, and the estrogen receptor β (ERβ), in oral mucosal cells. METHODS: Indirect immunofluorescence (IIF) was conducted on estrogen receptor beta (ERβ) activity after 1, 3, and 6days in response to 39nM BPA, 15μM BPA, and 200 pM 17β-Estradiol (E2)...
July 9, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28688735/implications-of-resin-based-composite-rbc-restoration-on-cuspal-deflection-and-microleakage-score-in-molar-teeth-placement-protocol-and-restorative-material
#5
Lauren E J McHugh, Ioanna Politi, Rami S Al-Fodeh, Garry J P Fleming
OBJECTIVE: To assess the cuspal deflection of standardised large mesio-occluso-distal (MOD) cavities in third molar teeth restored using conventional resin-based composite (RBC) or their bulk fill restorative counterparts compared with the unbound condition using a twin channel deflection measuring gauge. Following thermocycling, the cervical microleakage of the restored teeth was assessed to determine marginal integrity. METHODS: Standardised MOD cavities were prepared in forty-eight sound third molar teeth and randomly allocated to six groups...
July 5, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28662861/the-influence-of-y-tzp-surface-treatment-on-topography-and-ceramic-resin-cement-interfacial-fracture-toughness
#6
P N G Paes, F L Bastian, P M Jardim
OBJECTIVE: Consider the efficacy of glass infiltration etching (SIE) treatment as a procedure to modify the zirconia surface resulting in higher interfacial fracture toughness. METHODS: Y-TZP was subjected to 5 different surface treatments conditions consisting of no treatment (G1), SIE followed by hydrofluoric acid treatment (G2), heat treated at 750°C (G3), hydrofluoric acid treated (G4) and airborne-particle abrasion with alumina particles (G5). The effect of surface treatment on roughness was evaluated by Atomic Force Microscopy providing three different parameters: Ra, Rsk and surface area variation...
June 26, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28662860/different-peek-qualities-irradiated-with-light-of-different-wavelengths-impact-on-martens-hardness
#7
Nina Lümkemann, Marlis Eichberger, Bogna Stawarczyk
OBJECTIVES: To assess the impact of irradiation on Martens hardness parameters of different PEEK qualities filled with titanium dioxide (TiO2), namely PEEK/0%, PEEK/20%, and PEEK/>30%. METHODS: For Martens hardness (HM) measurements, 40 specimens of each PEEK quality were fabricated and air-abraded with 50μm Al2O3. HM parameters of PEEK specimens were measured initially and stepwise after irradiating for 5, 10, 20, 30, 40, 60, 80, 100, 180, 360 and 540s using light units with different wavelength: Elipar S10 (430-480nm), EyeVolutionMAX (385-390nm+465-470nm), Translux CL (380-500nm) and bre...
June 26, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28662859/monolithic-zirconia-dental-crowns-internal-fit-margin-quality-fracture-mode-and-load-at-fracture
#8
Christian Schriwer, Anneli Skjold, Nils Roar Gjerdet, Marit Øilo
OBJECTIVE: Dental all-ceramic restorations of zirconia, with and without an aesthetic veneering layer, have become a viable alternative to conventional metal-ceramic restorations. The aim of this study was to evaluate whether factors of the production methods or the material compositions affect load at fracture, fracture modes, internal fit or crown margins of monolithic zirconia crowns. METHODS: Sixty crowns made from six different commercially available dental zirconias were produced to a model tooth with a shallow circumferential chamfer preparation...
June 26, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28662858/comparison-of-three-and-four-point-bending-evaluation-of-two-adhesive-bonding-systems-for-glass-ceramic-zirconia-bi-layered-ceramics
#9
C Gee, J N Weddell, M V Swain
OBJECTIVES: To quantify the adhesion of two bonding approaches of zirconia to more aesthetic glass-ceramic materials using the Schwickerath (ISO 9693-2:2016) three point bend (3PB) [1] test to determine the fracture initiation strength and strain energy release rate associated with stable crack extension with this test and the Charalamabides et al. (1989) [2] four point bend (4PB) test. METHODS: Two glass-ceramic materials (VITABLOCS Triluxe forte, Vita Zahnfabrik, Germany and IPS...
June 26, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28662857/glass-ceramic-coating-material-for-the-co2-laser-based-sintering-of-thin-films-as-caries-and-erosion-protection
#10
Marin Dean Bilandžić, Susanne Wollgarten, Jochen Stollenwerk, Reinhart Poprawe, Marcella Esteves-Oliveira, Horst Fischer
OBJECTIVES: The established method of fissure-sealing using polymeric coating materials exhibits limitations on the long-term. Here, we present a novel technique with the potential to protect susceptible teeth against caries and erosion. We hypothesized that a tailored glass-ceramic material could be sprayed onto enamel-like substrates to create superior adhesion properties after sintering by a CO2 laser beam. METHODS: A powdered dental glass-ceramic material from the system SiO2-Na2O-K2O-CaO-Al2O3-MgO was adjusted with individual properties suitable for a spray coating process...
June 26, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28655478/the-impact-of-argon-oxygen-low-pressure-plasma-on-shear-bond-strength-between-a-veneering-composite-and-different-peek-materials
#11
Andreas Dominik Schwitalla, Friederike Bötel, Tycho Zimmermann, Mona Sütel, Wolf-Dieter Müller
OBJECTIVE: The aim of the study was to evaluate the impact of low-pressure argon/oxygen plasma with and without previous sandblasting on the shear bond strength (SBS) between dental PEEK compounds and a veneering composite. METHODS: Of one type of unfilled PEEK and two pigment powder filled PEEK compounds, forty rectangular plates each were prepared and polished up to 4000 grit. The samples were randomly assigned to four surface pre-treatment groups, each consisting of ten specimens (1...
June 24, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28651780/adm-research-guidance-papers
#12
EDITORIAL
Paulo Cesar, Reinhard Hickel, J Robert Kelly, Ulrich Lohbauer, David C Watts
No abstract text is available yet for this article.
June 23, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28641745/long-term-stability-of-an-injection-molded-zirconia-bone-level-implant-a-testing-protocol-considering-aging-kinetics-and-dynamic-fatigue
#13
Benedikt C Spies, Madeleine E Maass, Erik Adolfsson, Valter Sergo, Tobias Kiemle, Christoph Berthold, Elisa Gurian, Stefano Fornasaro, Kirstin Vach, Ralf-Joachim Kohal
OBJECTIVE: Separately addressing the fatigue resistance (ISO 14801, evaluation of final product) and aging behavior (ISO 13356, standardized sample) of oral implants made from yttria-stabilized zirconia proved to be insufficient in verifying their long-term stability, since (1) implant processing is known to significantly influence transformation kinetics and (2) aging, up from a certain level, is liable to decrease fatigue resistance. Therefore, the aim of this investigation was to apply a new testing protocol considering environmental conditions adequately inducing aging during dynamic fatigue...
June 20, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28610709/effect-of-dimethyl-sulfoxide-on-dentin-collagen
#14
P Mehtälä, D H Pashley, L Tjäderhane
OBJECTIVES: Infiltration of adhesive on dentin matrix depends on interaction of surface and adhesive. Interaction depends on dentin wettability, which can be enhanced either by increasing dentin surface energy or lowering the surface energy of adhesive. The objective was to examine the effect of dimethyl sulfoxide (DMSO) on demineralized dentin wettability and dentin organic matrix expansion. METHODS: Acid-etched human dentin was used for sessile drop contact angle measurement to test surface wetting on 1-5% DMSO-treated demineralized dentin surface, and linear variable differential transformer (LVDT) to measure expansion/shrinkage of dentinal matrix...
June 10, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28606410/effects-of-silane-and-mdp-based-primers-application-orders-on-zirconia-resin-adhesion-a-tof-sims-study
#15
Shu-Fen Chuang, Li-Li Kang, Yi-Chuan Liu, Jui-Che Lin, Ching-Cheng Wang, Hui-Min Chen, Cheng-Kun Tai
OBJECTIVE: To evaluate the 3-methacryloyloxypropyltrimethoxysilane (MPS)- and 10-methacryloyloxydecyl-dihydrogen-phosphate (MDP)-base primers, in their single or sequential applications, with regard to modifying zirconia surfaces and improving resin-zirconia adhesion. METHODS: Zirconia disks received different treatments: without primer (Zr), MPS-base primer (S), MDP-base primer (M), MPS/MDP mixture (SMmix), MPS followed by MDP (SM), and MDP followed by MPS (MS)...
June 9, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28606409/microstructural-analysis-and-reliability-of-monolithic-zirconia-after-simulated-adjustment-protocols
#16
Eliseo Pablo Chun, Lilian Costa Anami, Estevam Augusto Bonfante, Marco Antonio Bottino
OBJECTIVE: To investigate the microstructural properties and reliability of zirconia partially stabilized by yttrium oxide (Y-TZP) for use in monolithic form (Vita YZ HT, Vita Zahnfabrik, Germany) after different clinical adjustment protocols simulation. One-hundred and sixty two Y-TZP discs of high translucency were divided into 6 groups (n=27), according to simulated adjustments: S-Y-TZP as sintered; G-glazed Y-TZP; DbG-Y-TZP with diamond bur adjustment simulation followed by glaze application; GDb-glazed Y-TZP adjusted with diamond bur; DbDrG-Y-TZP with adjustment simulation with diamond bur and polishing kit (diamond rubber), followed by glaze; GDbDr-glazed Y-TZP with adjustment simulation with diamond bur followed by polishing kit...
June 9, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28587722/comparative-evaluation-of-topographical-data-of-dental-implant-surfaces-applying-optical-interferometry-and-scanning-electron-microscopy
#17
N Kournetas, S Spintzyk, E Schweizer, T Sawada, F Said, P Schmid, J Geis-Gerstorfer, G Eliades, F Rupp
OBJECTIVE: Comparability of topographical data of implant surfaces in literature is low and their clinical relevance often equivocal. The aim of this study was to investigate the ability of scanning electron microscopy and optical interferometry to assess statistically similar 3-dimensional roughness parameter results and to evaluate these data based on predefined criteria regarded relevant for a favorable biological response. METHODS: Four different commercial dental screw-type implants (NanoTite Certain Prevail, TiUnite Brånemark Mk III, XiVE S Plus and SLA Standard Plus) were analyzed by stereo scanning electron microscopy and white light interferometry...
June 3, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28583671/biomechanical-behaviour-of-craniofacial-sutures-during-distraction-an-evaluation-all-over-the-entire-craniofacial-skeleton
#18
Fabio Savoldi, James K H Tsoi, Corrado Paganelli, Jukka P Matinlinna
OBJECTIVE: Sutures are fibrous joints connecting the bones of the head. Despite the fundamental role played by sutures in dentofacial orthopaedics, their biomechanical properties are not completely understood. This study evaluated anatomy, biomechanics, and acoustic emission (AE) during distraction of the sutural ligament (SL). METHODS: Seventy-two suture samples were removed from a twelve-months-old swine (Sus scrofa) head. Each volume was acquired using micro-computed tomography (μCT), and the linear interdigitation index was calculated on both planes (LIICOR and LIISAG)...
June 2, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28577893/academy-of-dental-materials-guidance-resin-composites-part-i-mechanical-properties
#19
N Ilie, T J Hilton, S D Heintze, R Hickel, D C Watts, N Silikas, J W Stansbury, M Cadenaro, J L Ferracane
OBJECTIVE: The objective of this project, which was initiated from the Academy of Dental Materials, was to review and critically appraise methods to determine fracture, deformation and wear resistance of dental resin composites, in an attempt to provide guidance for investigators endeavoring to study these properties for these materials. METHODS: Test methods have been ranked in the priority of the specific property being tested, as well as of the specific test methods for evaluating that property...
May 31, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28577892/effects-of-edc-crosslinking-on-the-stiffness-of-dentin-hybrid-layers-evaluated-by-nanodma-over-time
#20
Zihou Zhang, Mustafa Mutluay, Arzu Tezvergil-Mutluay, Franklin R Tay, David H Pashley, Dwayne Arola
Application of collagen cross-linkers to demineralized dentin improves bond durability. While the benefits of cross-linking treatments to bond strength and fatigue resistance have been explored, changes in hybrid layer stiffness with aging have not been examined. OBJECTIVE: To examine the influence of a cross-linking treatment using 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) on hybrid layer stiffness of resin-dentin adhesive bonds, using spatially-resolved nanoscopic Dynamic Mechanical Analysis (nanoDMA)...
May 31, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
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