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Acta Biomaterialia Odontologica Scandinavica

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https://www.readbyqxmd.com/read/29707613/an-overview-of-development-and-status-of-fiber-reinforced-composites-as-dental-and-medical-biomaterials
#1
REVIEW
Pekka K Vallittu
Fibr-reinforced composites (FRC) have been used successfully for decades in many fields of science and engineering applications. Benefits of FRCs relate to physical properties of FRCs and versatile production methods, which can be utilized. Conventional hand lamination of prefabricated FRC prepregs is utilized still most commonly in fabrication of dental FRC devices but CAD-CAM systems are to be come for use in certain production steps of dental constructions and medical FRC implants. Although metals, ceramics and particulate filler resin composites have successfully been used as dental and medical biomaterials for decades, devices made out of these materials do not meet all clinical requirements...
2018: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/29707612/fracture-load-of-colored-and-non-colored-high-translucent-zirconia-three-unit-fixed-dental-prosthesis-frameworks
#2
Deyar Jallal Hadi Mahmood, Michael Braian, Abdul-Salam Khan, Armin Shabaz, Christel Larsson
Aim: The use of colored translucent zirconia may enable restorations of a more natural tooth-like appearance than previous opaque white zirconia. The shift from non-colored to colored zirconia may however entail a risk of reduced strength. The aim of the present study was to compare fracture load and fracture mode of fixed dental prostheses frameworks made of colored translucent zirconia to that of non-colored controls. Methods: A total of forty three-unit FDP frameworks were manufactured from two different high translucent zirconia materials (Zenostar, Wieland Dental, and DD cubeX2, Dental Direkt)...
2018: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/29536025/effect-of-low-shrinkage-monomers-on-the-physicochemical-properties-of-experimental-composite-resin
#3
Jingwei He, Sufyan Garoushi, Pekka K Vallittu, Lippo Lassila
This study was conducted to determine whether novel experimental low-shrinkage dimethacrylate co-monomers could provide low polymerization shrinkage composites without sacrifice to degree of conversion, and mechanical properties of the composites. Experimental composites were prepared by mixing 28.6 wt% of bisphenol-A-glycidyl dimethacrylate based resin matrix ( bis -GMA) with various weight-fractions of co-monomers; tricyclo decanedimethanol dacrylate (SR833s) and isobornyl acrylate (IBOA) to 71.4 wt% of particulate-fillers...
2018: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/29536024/-in-vitro-analysis-of-the-marginal-adaptation-and-discrepancy-of-stainless-steel-crowns
#4
Riaan Mulder, Rasha Medhat, Nadia Mohamed
Aim: The purpose of the study was to assess the marginal adaptation and discrepancy of SSC's. Differences in adaptation and discrepancy between the four surfaces (mesial, lingual, distal, and buccal) were evaluated. Methods: The placement of stainless steel crowns were completed on a phantom head in accordance with the clinical technique. The ideal tooth preparation was made and this 'master tooth' duplicated to achieve a sample size of 15. The stainless steel crowns were placed, trimmed, and cemented as per the clinical technique...
2018: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/29250576/repair-bond-strength-of-nanohybrid-composite-resins-with-a-universal-adhesive
#5
Pinar Altinci, Murat Mutluay, Arzu Tezvergil-Mutluay
Objective: To investigate the repair bond strength of fresh and aged nanohybrid and hybrid composite resins using a universal adhesive (UA). Materials and methods: Fresh and aged substrates were prepared using two nanohybrid (Venus Pearl, Heraus Kulzer; Filtek Supreme XTE, 3 M ESPE) and one hybrid (Z100, 3 M ESPE) composite resin, and randomly assigned to different surface treatments: (1) no treatment (control), (2) surface roughening with 320-grit (SR), (3) SR + UA (iBOND, Heraus Kulzer), (4) SR + Silane (Signum, Ceramic Bond I, Heraeus Kulzer) + UA, (5) SR + Sandblasting (CoJet, 3 M ESPE) + Silane + UA...
2018: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/29230430/triethylene-glycol-dimethacrylate-adjuvant-properties-and-effect-on-cytokine-production
#6
Sara Alizadehgharib, Anna-Karin Östberg, Ulf Dahlgren
Objective: Leakage of monomers from dental fillings due to incomplete curing is very common. The objective of the present study was to examine the cytokine profile in cells exposed to triethyleneglycol dimethacrylate (TEGDMA) and the adjuvant properties of TEGDMA. Materials and methods: Human peripheral blood mononuclear cells were exposed to TEGDMA (500 and 1000 μM) for 24 h in vitro . Bio-Plex Pro™ assays were used for analysis and detection of cytokines. In vivo, BALB/c mice were immunized subcutaneously in the base of the tail with TEGDMA in combination with ovalbumin (OVA)...
2018: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/29242816/dimensional-stability-of-two-impression-materials-after-a-6-month-storage-period
#7
Francisco Martins, Patrícia Branco, José Reis, Ignacio Barbero Navarro, Paulo Maurício
Objective: Oral rehabilitation success is enhanced by an accurate and reproducible final impression. The purpose of this study is to evaluate the dimensional changes of a polyether and addition silicone subjected to disinfection and/or sterilization after a long storage period. Material and methods: Ninety samples were obtained from polyether ImpregumTM PentaTM (3M ESPETM , Seefeld, Germany) and 90 of addition silicone ImprintTM 4 PentaTM Putty (3M ESPETM , Seefeld, Germany) according to ISO 4823:2000. The samples of each material were split to form three groups with 30 samples each: a control group, a hypochlorite group (disinfection) and an autoclave group (sterilization)...
2017: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/29242815/fracture-strength-of-veneered-translucent-zirconium-dioxide-crowns-with-different-porcelain-thicknesses
#8
Fahad Bakitian, Przemek Seweryniak, Evaggelia Papia, Christel Larsson, Per Vult von Steyern
Objective: To evaluate fracture strength of veneered translucent zirconium dioxide crowns designed with different porcelain layer thicknesses. Materials and Methods: Sixty crowns, divided into six groups of 10, were used in this study. Groups were divided according to different thicknesses of porcelain veneer on translucent zirconium dioxide cores of equal thickness (0.5 mm). Porcelain thicknesses were 2.5, 2.0, 1.0, 0.8, 0.5 and 0.3 mm. Crowns were artificially aged before loaded to fracture. Determination of fracture mode was performed using light microscope...
2017: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/29242814/release-of-titanium-after-insertion-of-dental-implants-with-different-surface-characteristics-an-ex-vivo-animal-study
#9
Mattias Pettersson, Jean Pettersson, Margareta Molin Thorén, Anders Johansson
In the present study, amount of titanium (Ti) released into the surrounding bone during placement of implants with different surface structure was investigated. Quantification of Ti released during insertion from three different implants was performed in this ex vivo study. Jaw bone from pigs was used as model for installation of the implants and Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) was used for analysis of the released Ti. Implant surface were examined with scanning electron microscopy (SEM), before and after the placement into the bone...
2017: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/29242813/cobalt-chromium-alloys-in-fixed-prosthodontics-in-sweden
#10
Maria Kassapidou, Victoria Franke Stenport, Lars Hjalmarsson, Carina B Johansson
Aim: The aim of this study was to compile the usage of Co-Cr alloys in fixed prosthodontics (FP) among dental laboratories in Sweden. Methods: From March to October 2015, questionnaires were sent to 542 registered dental laboratories in Sweden. The questionnaires were divided in two parts, one for fixed dental-supported prosthodontics (FDP) and one for fixed implant-supported prosthodontics (FIP). Reminders were sent three times. Results: In total of 542 dental laboratories, 55% answered the questionnaires...
2017: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642931/water-sorption-and-solubility-of-polyamide-denture-base-materials
#11
Long G Nguyen, Hilde M Kopperud, Marit Øilo
Purpose: Some patients experience adverse reactions to poly(methyl methacrylate)-based (PMMA) dentures. Polyamide (PA) as an alternative to PMMA has, however, not been well documented with regard to water sorption and water solubility. The aim of this in vitro study was to measure water sorption and water solubility of two PA materials compared with PMMA, and to evaluate the major components released from the PA materials and the effect on hardness of the materials. Methods: Ten discs (40.0 mm diameter, 2.0 mm thick) of each material (PA: Valplast and Breflex; PMMA: SR Ivocap HIP) were prepared according to manufacturers' recommendations...
January 2017: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642930/a-novel-etching-technique-for-surface-treatment-of-zirconia-ceramics-to-improve-adhesion-of-resin-based-luting-cements
#12
Eystein Ivar Ruyter, Nalini Vajeeston, Torbjørn Knarvang, Ketil Kvam
Objectives: Bonding of zirconia crowns and bridges to abutments is important, not only bonding of the thin resin layer to the abutment, but also bonding to the zirconia ceramic is crucial. Both mechanical and chemical adhesion are desired. Mechanical retention of dental porcelain achieved by etching with moderately concentrated hydrofluoric acid is not possible with zirconia ceramics. The purpose of this study was to show that etching is possible with relative low melting fluoride compounds such as ammonium hydrogen difluoride and potassium hydrogen difluoride...
January 2017: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642929/influence-of-dentin-pretreatment-on-bond-strength-of-universal-adhesives
#13
Claudio Poggio, Riccardo Beltrami, Marco Colombo, Marco Chiesa, Andrea Scribante
Objective: The purpose of the present study was to compare bond strength of different universal adhesives under three different testing conditions: when no pretreatment was applied, after 37% phosphoric acid etching and after glycine application. Materials and methods: One hundred and fifty bovine permanent mandibular incisors were used as a substitute for human teeth. Five different universal adhesives were tested: Futurabond M+, Scotchbond Universal, Clearfil Universal Bond, G-Premio BOND, Peak Universal Bond...
January 2017: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642928/effect-of-curing-and-silanizing-on-composite-repair-bond-strength-using-an-improved-micro-tensile-test-method
#14
Sigfus Thor Eliasson, Jon E Dahl
Objectives: To evaluate the micro-tensile repair bond strength between aged and new composite, using silane and adhesives that were cured or left uncured when new composite was placed. Methods: Eighty Filtek Supreme XLT composite blocks and four control blocks were stored in water for two weeks and thermo-cycled. Sandpaper ground, etched and rinsed specimens were divided into two experimental groups: A, no further treatment and B, the surface was coated with bis-silane. Each group was divided into subgroups: (1) Adper Scotchbond Multi-Purpose, (2) Adper Scotchbond Multi-Purpose adhesive, (3) Adper Scotchbond Universal, (4) Clearfil SE Bond and (5) One Step Plus...
January 2017: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642927/the-effect-of-grinding-and-or-airborne-particle-abrasion-on-the-bond-strength-between-zirconia-and-veneering-porcelain-a-systematic-review
#15
REVIEW
Karin Lundberg, Lindsey Wu, Evaggelia Papia
Objective: The aim of the study was to make an inventory of current literature on the bond strength between zirconia and veneering porcelain after surface treatment of zirconia by grinding with diamond bur and/or with airborne-particle abrasion. Material and methods: The literature search for the present review was made following recommended guidelines using acknowledged methodology on how to do a systematic review. The electronic databases PubMed, Cochrane Library, and Science Direct were used in the present study...
January 2017: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642926/the-combined-effect-of-food-simulating-solutions-brushing-and-staining-on-color-stability-of-composite-resins
#16
Tânia Mara Da Silva, Ana Luísa Leme Simões Sales, Cesar Rogerio Pucci, Alessandra Bühler Borges, Carlos Rocha Gomes Torres
Objective: This study evaluated the effect of food-simulating media associated with brushing and coffee staining on color stability of different composite resins. Materials and methods: Eighty specimens were prepared for each composite: Grandio SO (Voco), Amaris (Voco), Filtek Z350XT (3M/ESPE), Filtek P90 (3M/ESPE). They were divided into four groups according to food-simulating media for 7 days: artificial saliva (control), heptane, citric acid and ethanol. The composite surface was submitted to 10,950 brushing cycles (200 g load) in an automatic toothbrushing machine...
January 2017: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642925/the-effect-of-gelatinase-production-of-enterococcus-faecalis-on-adhesion-to-dentin-after-irrigation-with-various-endodontic-irrigants
#17
Mehmet Burak Guneser, Ayce Unverdi Eldeniz
Objectives: The aim of this study was to evaluate whether the gelatinase production ability of Enterococcus faecalis provides any advantage on adhesion of this bacterium to dentin treated with various irrigants and their combinations. Materials and methods: Standardized dentin discs were randomly divided into five groups (n = 20): group 1: 2.5% sodium hypochlorite (NaOCl), group 2: 2% chlorhexidine (CHX), group 3: NaOCl + Saline + CHX, group 4: NaOCl + EDTA + NaOCl, group 5: QMix. After incubation of dentin discs with irrigants, each group was divided into two subgroups (n = 10) according to the bacterial strains used; a gelatinase-producing and a gelatinase-deficient strain of E...
December 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642924/influence-of-niobium-pentoxide-addition-on-the-properties-of-glass-ionomer-cements
#18
Isadora Martini Garcia, Vicente Castelo Branco Leitune, Gabriela De Souza Balbinot, Susana Maria Werner Samuel, Fabrício Mezzomo Collares
Objective: To determine the influence of niobium pentoxide (Nb2O5) addition on the physical and chemical properties of glass ionomer cements (GICs). Materials and methods: Five, 10 or 20 wt.% of Nb2O5 were incorporated into commercial GICs (Maxxion R, Vitro Molar, Vitro Fil R) and one group of each GIC remained without Nb2O5 (control groups). The GICs were evaluated by Knoop hardness, compressive strength, acid erosion, particle size and radiopacity. Data were analyzed by two-way ANOVA followed by Tukey's test...
December 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642923/the-influence-of-particle-size-and-curing-conditions-on-testing-mineral-trioxide-aggregate-cement
#19
William Nguyen Ha, Bill Kahler, Laurence James Walsh
Objectives: To assess the effects on curing conditions (dry versus submerged curing) and particle size on the compressive strength (CS) and flexural strength (FS) of set MTA cement. Materials and methods: Two different Portland cements were created, P1 and P2, with P1 < P2 in particle size. These were then used to create two experimental MTA products, M1 and M2, with M1 < M2 in particle size. Particle size analysis was performed according to ISO 13320. The particle size at the 90th percentile (i.e. the larger particles) was P1: 15...
December 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642922/universal-cements-dual-activated-and-chemically-activated
#20
Eliane de Lima, Ricardo Santos, Márcia Durão, Armiliana Nascimento, Rodivan Braz
Objective: The aim of the present study was to assess the bond strength of universal cements cured either dually or chemically only. Methods: Three cements were assessed using different types of application: dual activated (DA) or chemically activated (CA). In total 80 dentin blocks were used, obtained through the enamel wear of the lingual and buccal surfaces of bovine incisors. Standard cone-shaped cavity preparations were created using diamond burs. Subsequently, indirect restoration blocks were designed with Filtek Z350 (3M ESPE) composite resin...
December 2016: Acta Biomaterialia Odontologica Scandinavica
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