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https://www.readbyqxmd.com/read/28526958/-ectopic-suprasellar-type-iia-prl-secreting-pituitary-adenoma
#1
REVIEW
Heng-Jun Zhou, De-Sheng Pan, Xiao-Qun Ba, Ren-Ya Zhan, Xiu-Jue Zheng, Yue-Hui Ma
BACKGROUND: Ectopic pituitary adenomas (EPAs) are rare, and the suprasellar cistern seems to be the most common location. At this time, no detailed original classification, diagnosis, or treatment protocols for suprasellar pituitary adenomas (SPAs) have been described. CASE DESCRIPTION: A 19-year-old man showed visual disturbances and lack of libido for 3 years, he suffered a sharp decline in vision with only light perception in the last week. Magnetic resonance imaging scans revealed a large suprasellar cystic lesion with a normal pituitary in the sella turcica...
May 19, 2017: Pituitary
https://www.readbyqxmd.com/read/28526054/assessing-degradation-of-composite-resin-cements-during-artificial-aging-by-martens-hardness
#2
Stefan Bürgin, Nadja Rohr, Jens Fischer
BACKGROUND: Aim of the study was to verify the efficiency of Martens hardness measurements in detecting the degradation of composite resin cements during artificial aging. METHODS: Four cements were used: Variolink II (VL2), RelyX Unicem 2 Automix (RUN), PermaFlo DC (PDC), and DuoCem (DCM). Specimens for Martens hardness measurements were light-cured and stored in water at 37 °C for 1 day to allow complete polymerization (baseline). Subsequently the specimens were artificially aged by water storage at 37 °C or thermal cycling (n = 6)...
May 19, 2017: Head & Face Medicine
https://www.readbyqxmd.com/read/28522192/overcoming-photodynamic-resistance-and-tumor-targeting-dual-therapy-mediated-by-indocyanine-green-conjugated-gold-nanospheres
#3
Wei Li, Xiaomeng Guo, Fenfen Kong, Hanbo Zhang, Lihua Luo, Qingpo Li, Chunqi Zhu, Jie Yang, Yongzhong Du, Jian You
Photodynamic therapy (PDT) and photothermal therapy (PTT) have captured much attention due to the great potential to cure malignant tumor. Nevertheless, photodynamic resistance of cancer cells has limited the further efficacy of PDT. Unfortunately, the resistance mechanism and efforts to overcome the resistance still have been rarely reported so far. Here, we report a nanosystem with specific tumor targeting for combined PDT and PTT mediated by near-infrared (NIR) light, which was established by covalently conjugating indocyanine green (ICG) and TNYL peptide onto the surface of hollow gold nanospheres (HAuNS)...
May 15, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28522161/effect-of-blue-and-violet-light-on-polymerization-shrinkage-vectors-of-a-cq-tpo-containing-composite
#4
Camila S Sampaio, Pablo J Atria, Frederick A Rueggeberg, Satoshi Yamaguchi, Marcelo Giannini, Paulo G Coelho, Ronaldo Hirata, Regina M Puppin-Rontani
OBJECTIVE: To evaluate the effect of light-curing wavelengths on composite filler particle displacement, and thus to visualize localized polymerization shrinkage in a resin-based composite (RBC) containing camphorquinone (CQ) and Lucirin TPO (TPO). METHODS: Three light-curing units (LCUs) were used to light-cure a RBC containing CQ and TPO: a violet-only, a blue-only, and a dual-wavelength, conventional (Polywave(®), emitting violet and blue wavelengths simultaneously)...
May 15, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28521992/tragacanth-nanocapsules-containing-chamomile-extract-prepared-through-sono-assisted-w-o-w-microemulsion-and-uv-cured-on-cotton-fabric
#5
Soraya Ghayempour, Majid Montazer
Encapsulation is the best method to protect the plant extracts against volatility and instability in the presence of air, light, moisture and high temperatures. Nevertheless, application of encapsulated plant extracts on the textiles requires a low-temperature and high rate processing to avoid from breaking or destroying of capsules. The present paper represents application of nanocapsules prepared by ultrasound irradiation assisted W/O/W microemulsion method on the cotton fabric through UV curing method. The surface and structure of nanocapsules and treated cotton fabric using FESEM and FT-IR indicated the spherical nanocapsules with size of 60-80nm stabilized on the fabric surface in a film layer feature...
August 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28521113/real-time-imaging-of-gap-progress-during-and-after-composite-polymerization
#6
J Hayashi, Y Shimada, J Tagami, Y Sumi, A Sadr
The aims of this study were to observe the behavior of composite and formation of gaps during and immediately after light polymerization using swept source optical coherence tomography (OCT) and to compare the interfacial integrity of adhesives in cavities through 3-dimensional (3D) image analysis. Forty tapered cylindrical cavities (4-mm diameter, 2-mm depth) were prepared in bovine incisors and restored using Bond Force (BF), Scotchbond Universal Adhesive (SBU), OptiBond XTR (XTR), or Clearfil SE Bond 2 (SE2), followed by Estelite Flow Quick flowable composite...
May 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28510375/the-effect-of-irradiation-distance-on-light-transmittance-and-vickers-hardness-ratio-of-two-bulk-fill-resin-based-composites
#7
Zahra Almuallem, Sinead McDonnell, Antoniella Busuttil-Naudi, Ario Santini
The aims of this study were to assess the light energy transmission and Vickers hardness (VH) ratio of two bulk-fill resin-based composites (RBCs) (Tetric EvoCeram and Filtek) cured at different distances between the light curing unit's (LCU) tip and the surface of the restoration (T-S) using either a Bluephase G2, Bluephase® 'turbo tip' or Bluephase Style LCU. Samples were cured from the top at T-S distances of 2mm, 6mm and 10mm for 20 seconds. A MARC-Resin-Calibrator™ recorded the transmitted irradiance reaching the bottom of the sample, in real time...
December 2016: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28510374/qualitative-beam-profiling-of-light-curing-units-for-resin-based-composites
#8
Thomas Haenel, Berenika Hausnerová, Johannes Steinhaus, Ing Bernhard Moeginger
This study investigates two technically simple methods to determine the irradiance distribution of light curing units that governs the performance of a visible-light curing resin-based composites. Insufficient light irradiation leads to under-cured composites with poor mechanical properties and elution of residual monomers. The unknown irradiance distribution and its effect on the final restoration are the main critical issues requiring highly sophisticated experimental equipment. The study shows that irradiance distributions of LCUs can easily be determined qualitatively with generally available equipment...
December 2016: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28509505/effects-of-different-porcelains-and-shades-on-light-transmission-and-resin-polymerization
#9
Maan Alshaafi, Mohammed AlQahtani, Richard Price
This study evaluated the effect of light-curing through two ceramics on the degree of conversion-(DC) and Knoop microhardness-(KHN) of resin cements. Three shades were used and light-cured directly on a Golden Gate attenuated total reflectance FT-IR plate at 30°C. KHN was tested immediately and after 24-h. Resin shade, type of ceramic, and storage time all had significant effects on the DC and KHN values. Within each shade, the choice of ceramic always had a significant effect, but the shade of the resin had a greater effect...
September 2016: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28508242/preclinical-study-of-a-cost-effective-photodynamic-therapy-protocol-for-treating-oral-candidoses
#10
Nathalia Ramos da Silva, Daniela Garcia Ribeiro, João Paulo Mardegan Issa, Karla Bonfá, Michelli Sobreiro Menezes, Viviane de Cássia Oliveira, Raphael Freitas de Souza
Photodynamic therapy (PDT) is a promising treatment for oral candidoses. Its use as an alternative to antifungals prevents several adverse effects, including microbial resistance. However, most PDT protocols do not employ devices and consumables commonly available in dental practice, thus influencing treatment affordability. This study aimed to determine the efficacy of a PDT method based on light curing units' blue LEDs combined to a plaque-disclosing composition (5% erythrosine) against C. albicans in culture and in a murine model of oral candidosis...
May 15, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28508038/origami-by-frontal-photopolymerization
#11
Zeang Zhao, Jiangtao Wu, Xiaoming Mu, Haosen Chen, H Jerry Qi, Daining Fang
Origami structures are of great interest in microelectronics, soft actuators, mechanical metamaterials, and biomedical devices. Current methods of fabricating origami structures still have several limitations, such as complex material systems or tedious processing steps. We present a simple approach for creating three-dimensional (3D) origami structures by the frontal photopolymerization method, which can be easily implemented by using a commercial projector. The concept of our method is based on the volume shrinkage during photopolymerization...
April 2017: Science Advances
https://www.readbyqxmd.com/read/28504293/quantifying-the-sensitivity-of-the-network-structure-and-properties-from-simultaneous-measurements-during-photopolymerization
#12
Swarnavo Sarkar, Paula J Baker, Edwin P Chan, Sheng Lin-Gibson, Martin Y M Chiang
We present a method that combines experimental and computational approaches to assess a comprehensive set of structural and functional evolution during a network formation process via photopolymerization. Our work uses the simultaneous measurement of the degree of conversion, polymerization stress, the change in reaction temperature, and shrinkage strain in situ. These measurements are combined with the theory of viscoelastic materials to deduce the relaxation time and frequency-dependent modulus of the polymerizing network...
May 15, 2017: Soft Matter
https://www.readbyqxmd.com/read/28503477/color-stability-of-bulk-fill-and-incremental-fill-resin-based-composites-polished-with-aluminum-oxide-impregnated-disks
#13
Uzay Koc-Vural, Ismail Baltacioglu, Pinar Altinci
OBJECTIVES: This study aimed to evaluate the color stability of bulk-fill and nanohybrid resin-based composites polished with 3 different, multistep, aluminum-oxide impregnated finishing and polishing disks. MATERIALS AND METHODS: Disk-shaped specimens (8 mm in diameter and 4 mm in thickness) were light-cured between two glass slabs using one nanohybid bulk-fill (Tetric EvoCeram, Ivoclar Vivadent), one micro-hybrid bulk-fill (Quixfil, Dentsply), and two nanohybrid incremental-fill (Filtek Ultimate, 3M ESPE; Herculite XRV Ultra, Kerr) resin-based composites, and aged by thermocycling (between 5 - 55℃, 3,000 cycles)...
May 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/28503474/bonding-of-the-silane-containing-multi-mode-universal-adhesive-for-lithium-disilicate-ceramics
#14
Hyun-Young Lee, Geum-Jun Han, Juhea Chang, Ho-Hyun Son
OBJECTIVES: This study evaluated the influence of a multi-mode universal adhesive (MUA) containing silane (Single Bond Universal, 3M EPSE) on the bonding of resin cement to lithium disilicate. MATERIALS AND METHODS: Thirty IPS e.max CAD specimens (Ivoclar Vivadent) were fabricated. The surfaces were treated as follows: Group A, adhesive that did not contain silane (ANS, Porcelain Bonding Resin, Bisco); Group B, silane (S) and ANS; Group C, hydrofluoric acid (HF), S, and ANS; Group D, MUA; Group E, HF and MUA...
May 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/28494373/influence-of-li-charge-compensator-ion-on-the-energy-transfer-from-pr-3-to-gd-3-ions-in-ca9mg-po4-6f2-gd-3-pr-3-li-phosphor
#15
Sumedha Tamboli, S J Dhoble
Phototherapy is a renowned treatment for curing skin diseases since ancient times. Phototherapeutic treatment for psoriasis and many other diseases require narrow band ultra violet-B (NB-UVB) light with peak intensity at 313nm to be exposed to the affected part of body. In this paper, we report combustion synthesis of NB-UVB -313nm emitting Ca9Mg(PO4)6F2 phosphors doped with Gd(3+), Pr(3+) and Li(+) ions. The phase formation was confirmed by obtaining X-ray diffraction (XRD) pattern and morphology was studied with the Scanning electron microscopy (SEM) images...
May 2, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28490843/factors-affecting-polymerization-of-resin-based-composites-a-literature-review
#16
REVIEW
Maan M AlShaafi
AIM: The aim of this review was to help clinicians improve their understanding of the polymerization process for resin-based composites (RBC), the effects of different factors on the process and the way in which, when controlled, the process leads to adequately cured RBC restorations. METHODS: Ten factors and their possible effects on RBC polymerization are reviewed and discussed, with some recommendations to improve that process. These factors include RBC shades, their light curing duration, increment thickness, light unit system used, cavity diameter, cavity location, light curing tip distance from the curing RBC surface, substrate through which the light is cured, filler type, and resin/oral cavity temperature...
April 2017: Saudi Dental Journal
https://www.readbyqxmd.com/read/28487037/effect-of-self-curing-activators-and-curing-protocols-on-adhesive-properties-of-universal-adhesives-bonded-to-dual-cured-composites
#17
Mario Felipe Gutiérrez, Elisama Sutil, Pâmela Malaquias, Thalita de Paris Matos, Lucas Marques de Souza, Alessandra Reis, Jorge Perdigão, Alessandro D Loguercio
OBJECTIVES: To measure microshear bond strength (μSBS) and nanoleakage (NL) of self-etch universal adhesives under core buildup restorations using different curing protocols, at 24h and after 6-month water storage. METHODS: Middle dentin of 55 molars was divided into: Clearfil Universal Bond [CFU], Prime&Bond Elect [PBE], and One Coat 7 Universal [OCU]. All-Bond Universal [ABU] and Clearfil SE Bond [CSE] were used as control. CFU, PBE and OCU were: light-cured [LC], dual-cured [DC] and self-cured [SC]...
May 6, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28472053/recurrent-tuberculosis-and-associated-factors-a-five-year-countrywide-study-in-uzbekistan
#18
Jamshid Gadoev, Damin Asadov, Anthony D Harries, Nargiza Parpieva, Katie Tayler-Smith, Petros Isaakidis, Engy Ali, Sven Gudmund Hinderaker, Gozalov Ogtay, Andrew Ramsay, Avazbek Jalolov, Masoud Dara
BACKGROUND: In Uzbekistan, despite stable and relatively high tuberculosis treatment success rates, relatively high rates of recurrent tuberculosis have recently been reported. Recurrent tuberculosis is when a patient who was treated for pulmonary tuberculosis and cured, later develops the disease again. This requires closer analysis to identify possible causes and recommend interventions to improve the situation. Using countrywide data, this study aimed to analyse trends in recurrent tuberculosis cases and describe their associations with socio-demographic and clinical factors...
2017: PloS One
https://www.readbyqxmd.com/read/28465067/unbound-monomers-do-diffuse-through-the-dentin-barrier
#19
Kods Mahdhaoui, Benjamin Fournier, Mathieu A Derbanne
OBJECTIVES: Assessing the role of dentinal fluid proteins in trans-dentinal diffusion of free monomers in vitro. METHODS: An artificial pulp chamber (APC) topped human dentin disks was used. A simplified two-step etch-and-rinse adhesive was formulated with 2-hydroethyl-methacrylate (HEMA), Bisphenol-A-diglycidyl-methacrylate (BisGMA), using Camphorquinone/tertiary amine as initiators. Two extraction media were used: buffered saline (Control), buffered saline with 1% bovine serum albumin (BSA)...
April 29, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28464797/modeling-the-patient-and-health-system-impacts-of-alternative-xpert%C3%A2-mtb-rif-algorithms-for-the-diagnosis-of-pulmonary-tuberculosis-in-addis-ababa-ethiopia
#20
Abraham Tesfaye, Daniel Fiseha, Dawit Assefa, Eveline Klinkenberg, Silvia Balanco, Ivor Langley
BACKGROUND: To reduce global tuberculosis (TB) burden, the active disease must be diagnosed quickly and accurately and patients should be treated and cured. In Ethiopia, TB diagnosis mainly relies on spot-morning-spot (SMS) sputum sample smear analysis using Ziehl-Neelsen staining techniques (ZN). Since 2014 targeted use of xpert has been implemented. New diagnostic techniques have higher sensitivity and are likely to detect more cases if routinely implemented. The objective of our study was to project the effects of alternative diagnostic algorithms on the patient, health system, and costs, and identify cost-effective algorithms that increase TB case detection in Addis Ababa, Ethiopia...
May 2, 2017: BMC Infectious Diseases
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