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Welcome to the Pubget Medical Subject Headings (MESH) browser. Click on a topic or subtopic below to explore related papers. In the gold box is the most recent paper about the current MESH term, and below are 20 related papers.
Hardness (1):
Recent article
Hardness
Abstract
This study aimed to investigate the effects of dry and humid heat curing on the physical and drug release properties of polyvinyl acetate-polyvinyl pyrrolidone matrices. Both conditions resulted in increased tablet hardness; tablets stored under humid conditions showed high plasticity and deformed d...
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PMID: 20174981
PDF is available here.
PDF is available here.
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Pharmaceutical Biology (48)3 2010
Abstract
This study evaluated the influence of Psidium cattleianum Sabine (Myrtaceae) and Myracrodruon urundeuva Allemão (Anacardiaceae) aqueous extracts on S. mutans counts and dental enamel micro-hardness of rats submitted to a cariogenic challenge. Sixty Wistar rats were distributed in three groups and r...
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PMID: 20645817
PDF is available here.
PDF is available here.
Abstract
The failure of facial prostheses is caused by limitations in the properties of existing materials, especially flexibility and durability. Therefore, this study evaluated the Shore A hardness of silicone used for fabrication of facial prostheses, Silastic MDX4-4210, according to the influence of stor...
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PMID: 20186092
PDF is available here.
PDF is available here.
Acta Biomaterialia (6)3 2010
Abstract
A poly(propylene glycol-co-lactide) dimethacrylate adhesive with monocalcium phosphate monohydrate (MCPM)/beta-tricalcium phosphate (beta-TCP) fillers in various levels has been investigated. Water sorption by the photo-polymerized materials catalyzed varying filler conversion to dic...
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PMID: 19800424
PDF is available here.
PDF is available here.
Dental Materials Journal (29)2 2010
Abstract
The purpose of this study is to verify the hypothesis that the hardness and flexural strength of composite resin restorative materials are correlated and similarly affected by accelerated aging. With four different composite resins (Tetric Evo Ceram, Synergy, Filtek Supreme, Quixfil), the effects of...
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PMID: 20379029
PDF is available here.
PDF is available here.
Abstract
The purpose of this study was to quantify relative contributions of impact interface, muscle activity, and knee angle to the magnitudes of tibial and femoral accelerations occurring after external impacts. Impacts were initiated with a pneumatically driven impacter under the heels of four volunteers...
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PMID: 20147752
PDF is available here.
PDF is available here.
Abstract
To evaluate the wear resistance of artificial denture teeth and their human enamel antagonists in a dual-axis chewing simulator.
Four artificial denture teeth--feldspathic ceramic, nanofilled composite resin, experimental acrylic resin with UDMA/PMMA, and interpenetrating polymer networks (IPN) acry...
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PMID: 20165747
PDF is available here.
PDF is available here.
Abstract
Bone healing was achieved without any complication in due time for all but two patients. In one case, a plate fracture was observed. In the other case, a slight mobility of the upper jaw appeared after removal of the device. No intolerance was observed. DISCUSSION: This novel miniplate seems to be i...
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PMID: 19836040
PDF is available here.
PDF is available here.
Dentistry today (29)2 2010
Abstract
Abstract
%EP and microhardness of all cements were higher when the light-cure mode of dual-activation was used (P<0.05) instead of only self-curing. No significant difference in %EP was found between either self-adhesive cement or the control using either the light- or self-curing modes. In the light-activat...
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PMID: 20437721
PDF is available here.
PDF is available here.
Abstract
After treatment with the whitening agents, there was an 8.1-10.7% decrease in the original microhardness. These values were similar to those obtained from the samples treated with distilled water. In the same resin product, the decrease was similar regardless of the test agents used. In most cases,...
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PMID: 20437722
PDF is available here.
PDF is available here.
Abstract
Mechanical testing of bending strength, hardness, fracture toughness, and fatigue life indicated that zirconia implants with the proposed partially hollow configuration can be fabricated to have structural properties comparable to or exceeding the usual requirements for implants. Animal testing sugg...
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PMID: 20116714
PDF is available here.
PDF is available here.
Abstract
We suggest that previous nanoindentation results can be reanalyzed to characterize the viscoelastic creep using the Voigt model....
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PMID: 20370248
PDF is available here.
PDF is available here.
Biomaterials (31)5 2010
Abstract
Calcium phosphate cement (CPC) has in situ-setting ability and bioactivity, but the brittleness and low strength limit CPC to only non-load-bearing bone repairs. Human umbilical cord mesenchymal stem cells (hUCMSCs) can be harvested without an invasive procedure required for the comm...
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PMID: 19850337
PDF is available here.
PDF is available here.
Abstract
The present study was designed to study drug release retardant property of myrrh oleo-gum resin from tablets prepared by direct compression method (without binding agent). The tablets were evaluated for various physical tests viz. hardness, friability, tensile strength and drug content. Accelerated...
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PMID: 20524434
PDF is available here.
PDF is available here.
Abstract
Ceramic/polymer composites have been considered as third-generation orthopedic biomaterials due to their ability to closely match properties (such as surface, chemistry, biological, and mechanical) of natural bone. It has already been shown that the addition of nanophase compared with conventional (...
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PMID: 20463945
PDF is available here.
PDF is available here.
Abstract
Zirconia (ZrO(2)) and barium sulfate (BaSO(4)) particles were introduced into a methyl methacrylate monomer (MMA) solution with polymethyl methacrylate (PMMA) beads during polymerization to develop the following novel bone cements: bone cements with unfunctionalized ZrO(2) micron particles, bone cem...
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PMID: 20161983
PDF is available here.
PDF is available here.
In-vivo dynamic characterization of microneedle skin penetration using optical coherence tomography.
Abstract
We report on the first use of optical coherence tomography technology to image microneedle penetration in real time and in vivo. We show that optical coherence tomography (OCT) can be used to painlessly measure stratum corneum and epidermis thickness, as well as microneedle penetration depth after m...
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PMID: 20799803
PDF is available here.
PDF is available here.
Abstract
As resin-modified glass-ionomer cement (RMGIC) is an adhesive material, its association to dentin bonding agents (DBAs) was previously proposed. This study investigated the adjunctive behavior of an RMGIC with etch-and-rinse bonding systems under in situ/ex vivo cariogenic challenge.
Bovine enamel b...
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PMID: 20927415
PDF is available here.
PDF is available here.
Abstract
To compare the ability of four light-emitting diode (LED) curing lights to polymerize five composite resins in 10 seconds at 4 and 8 mm.
Two second-generation, single-peak LED curing lights (Bluephase 16i, Ivoclar Vivadent, and LEDemetron II, Kerr) and two third-generation polywave LED curing lights...
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PMID: 20927414
PDF is available here.
PDF is available here.
Abstract
To compare wear performance and resistance to crack propagation (K1C) of commercial restorative materials and their flowable variations. A potential correlation between three-body wear and fracture toughness, modulus of elasticity, fracture work, Vickers hardness, and filler content was investigated...
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PMID: 19907723
PDF is available here.
PDF is available here.
Abstract
The objective of this study was to determine the ability of a calcium sodium phosphosilicate (NovaMin) particulate to occlude dentin tubules, and to characterize the nature of the occlusion through a number of in vitro studies.
Four experiments were designed to demonstrate the ability of NovaMin to...
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PMID: 21207916
PDF is available here.
PDF is available here.
Operative Dentistry (35)4 2010
Abstract
This in vitro study investigated the aging behavior of dental composites with regard to surface roughness (SR), Vickers hardness (VH) and flexural strength (FS), and the study elucidated the impact of artificial aging parameters. One hundred and sixty-five rectangular specimens were prepared from fi...
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PMID: 20672725
PDF is available here.
PDF is available here.
Operative Dentistry (35)3 2010
Abstract
This study compared the ability of adhesive systems to inhibit in vitro caries lesions in enamel under high cariogenic challenge. Bovine enamel blocks with cavity preparations were restored with AP-X resin composite (Kuraray Med) using four adhesives systems: Clearfil SE Bond (Kuraray Med); Clearfil...
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PMID: 20533636
PDF is available here.
PDF is available here.
General dentistry (58)4 2010
Abstract
For this study, 120 fragments obtained from human third molars were randomly separated into 12 groups (n = 10). Four groups were used for measuring the Knoop hardness number (KHN) of enamel, while the other eight were used for testing the microtensile bond strength (muTBS) of two adhesive systems (S...
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PMID: 20591767
PDF is available here.
PDF is available here.