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https://www.readbyqxmd.com/read/29142642/shear-bond-strength-of-composite-resin-to-high-performance-polymer-pekk-according-to-surface-treatments-and-bonding-materials
#1
Ki-Sun Lee, Myoung-Sik Shin, Jeong-Yol Lee, Jae-Jun Ryu, Sang-Wan Shin
PURPOSE: The object of the present study was to evaluate the shear bonding strength of composite to PEKK by applying several methods of surface treatment associated with various bonding materials. MATERIALS AND METHODS: One hundred and fifty PEKK specimens were assigned randomly to fifteen groups (n = 10) with the combination of three different surface treatments (95% sulfuric acid etching, airborne abrasion with 50 µm alumina, and airborne abrasion with 110 µm silica-coating alumina) and five different bonding materials (Luxatemp Glaze & Bond, Visio...
October 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29142344/investigating-the-role-of-global-histogram-equalization-technique-for-99m-technetium-methylene-diphosphonate-bone-scan-image-enhancement
#2
Anil Kumar Pandey, Param Dev Sharma, Pankaj Dheer, Girish Kumar Parida, Harish Goyal, Chetan Patel, Chandrashekhar Bal, Rakesh Kumar
Purpose of the Study: (99m)Technetium-methylene diphosphonate ((99m)Tc-MDP) bone scan images have limited number of counts per pixel, and hence, they have inferior image quality compared to X-rays. Theoretically, global histogram equalization (GHE) technique can improve the contrast of a given image though practical benefits of doing so have only limited acceptance. In this study, we have investigated the effect of GHE technique for (99m)Tc-MDP-bone scan images. Materials and Methods: A set of 89 low contrast (99m)Tc-MDP whole-body bone scan images were included in this study...
October 2017: Indian Journal of Nuclear Medicine: IJNM: the Official Journal of the Society of Nuclear Medicine, India
https://www.readbyqxmd.com/read/29127475/associations-between-the-adherence-to-the-mediterranean-diet-and-cardiorespiratory-fitness-with-total-and-central-obesity-in-preschool-children-the-prefit-project
#3
Idoia Labayen Goñi, Lide Arenaza, María Medrano, Natalia García, Cristina Cadenas-Sanchez, Francisco B Ortega
PURPOSE: Early recognition of risk factors associated with overweight/obesity is an important step towards preventing long-term health consequences. The aim of the current study was to examine the associations of the adherence to the Mediterranean dietary pattern (MDP) and cardiorespiratory fitness (CRF) with adiposity in preschool children from the north of Spain. METHODS: The adherence to the MDP (KIDMED), CRF (20-m shuttle run test), total (BMI) and central (waist circumference) adiposity and socio-demographic factors were assessed in 619 children (48...
November 10, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/29123014/positron-emission-tomography-using-a-grpr-antagonist-68-ga-rm26-in-healthy-volunteers-and-prostate-cancer-patients
#4
Jingjing Zhang, Gang Niu, Xingrong Fan, Lixin Lang, Guozhu Hou, Libo Chen, Huanwen Wu, Zhaohui Zhu, Fang Li, Xiaoyuan Chen
This study was designed to study the safety, biodistribution, radiation dosimetry of a gastrin-releasing peptide receptor (GRPR) antagonist positron emission tomography (PET) tracer (68)Ga-RM26, to assess its clinical diagnostic value in prostate cancer patients, and to perform a direct comparison between GRPR antagonist (68)Ga-RM26 and agonist (68)Ga-BBN. Methods: Five healthy volunteers were enrolled to validate the safety of (68)Ga-RM26 and calculate dosimetry. A total of 28 patients with prostate cancer (17 newly diagnosed and 11 post therapy) were recruited with written informed consent...
November 9, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29119093/surface-modification-for-bonding-between-amalgam-and-orthodontic-brackets
#5
Wittawat Wongsamut, Sirichom Satrawaha, Kornchanok Wayakanon
OBJECTIVE: Testing of methods to enhance the shear bond strength (SBS) between orthodontic metal brackets and amalgam by sandblasting and different primers. MATERIALS AND METHODS: Three hundred samples of amalgam restorations (KerrAlloy(®)) were prepared in self-cured acrylic blocks, polished, and divided into two groups: nonsandblasted and sandblasted. Each group was divided into five subgroups with different primers used in surface treatment methods, with a control group of bonded brackets on human mandibular incisors...
October 2017: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/29109822/the-effect-of-various-types-of-mechanical-and-chemical-preconditioning-on-the-shear-bond-strength-of-orthodontic-brackets-on-zirconia-restorations
#6
Jihun Kim, Chanhee Park, Jeong-Sub Lee, Jungho Ahn, Yoon Lee
The purpose of this study was to investigate the combined effect of mechanical and chemical treatments on the shear bond strength (SBS) of metal orthodontic brackets on zirconia restoration. The zirconia specimens were randomly divided into 12 groups (n = 10) according to three factors: AL (Al2O3) and CO (CoJet™) by sandblasting material; SIL (silane), ZPP (Zirconia Prime Plus), and SBU (Single Bond Universal) by primer; and N (not thermocycled) and T (thermocycled). The specimens were evaluated for shear bond strength, and the fractured surfaces were observed using a stereomicroscope...
2017: Scanning
https://www.readbyqxmd.com/read/29109340/effect-of-three-metal-priming-agents-on-the-bond-strength-of-adhesive-resin-cement-to-ag-zn-sn-in-alloy-and-component-metals
#7
Natsuko Imamura, Tomohiro Kawaguchi, Hiroshi Shimizu, Yutaka Takahashi
The aim of this study was to investigate the effect of three metal priming agents on the bond strength of adhesive resin cement to Silver-Zinc-Tin-Indium (Ag-Zn-Sn-In) alloy and pure Ag, Zn, Sn, and In. The specimens were air-abraded with alumina and then primed with one of three metal priming agents: V-Primer, Estenia Opaque Primer, or Alloy Primer. The metal disks were bonded with adhesive resin cement (Super-Bond Bulk-mix technique). Shear bond strengths (n=10/group) were determined before and after 50,000 thermocycles for Ag-Zn-Sn-In alloy as well as after 5,000 thermocycles for pure Ag, Zn, Sn and In...
November 3, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/29098160/micro-raman-vibrational-identification-of-10-mdp-bond-to-zirconia-and-shear-bond-strength-analysis
#8
Diego Martins De-Paula, Alessandro D Loguercio, Alessandra Reis, Natasha Marques Frota, Radamés Melo, Kumiko Yoshihara, Victor Pinheiro Feitosa
So far, there is no report regarding the micro-Raman vibrational fingerprint of the bonds between 10-methacryloyloxy-decyl dihydrogen phosphate (10-MDP) and zirconia ceramics. Thus, the aim of this study was to identify the Raman vibrational peaks related to the bonds of 10-MDP with zirconia, as well as the influence on microshear bond strength. Micro-Raman spectroscopy was employed to assess the vibrational peak of 10-MDP binding to zirconia. Microshear bond strength of the dual-cure resin cement to zirconia with the presence of 10-MDP in composition of experimental ceramic primer and self-adhesive resin cement was also surveyed...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29076901/unexpected-pyelonephritis-incidentally-revealed-on-99mtc-mdp-bone-scintigraphy
#9
Xiaofei Zhao, Ruifang Zhao, Ha Wu
A 5-year-old girl had intermittent fever for 4 months. A Tc MDP bone scintigraphy was performed to evaluate possible occult osteomyelitis, which revealed no bone lesion. However, abnormal MDP activity in the upper poles of both kidneys was noted, which was confirmed as pyelonephritis subsequently.
October 26, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/29050817/zirconia-surface-modification-by-a-novel-zirconia-bonding-system-and-its-adhesion-mechanism
#10
Takahiro Murakami, Shinji Takemoto, Norihiro Nishiyama, Masahiro Aida
OBJECTIVE: Bonding to zirconia has been of great interest over the last 10-15 years. The aim of this study was to develop a zirconia bonding system and clarify its adhesion mechanism. METHODS: A zirconia primer was prepared using tetra-n-propoxy zirconium (TPZr) and water. A silane primer was also prepared using γ-methacryloyloxypropyltrimethoxysilane (γ-MPS) and hydrochloric acid. After the zirconia primer was applied to the oxidized zirconia surface, the silane primer was applied to the ZrO2-functionalized layer and the resin cement was applied to the silane-modified layer...
October 16, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29038027/tumor-necrosis-factor-alpha-and-soluble-tnf-alpha-receptor-responses-in-young-vs-middle-aged-males-following-eccentric-exercise
#11
Eliott Arroyo, Adam J Wells, Joseph A Gordon, Alyssa N Varanoske, Yftach Gepner, Nicholas A Coker, David D Church, David H Fukuda, Jeffrey R Stout, Jay R Hoffman
BACKGROUND: Tumor necrosis factor-alpha (TNF-α) has been shown to be implicated in both muscle regeneration and muscle wasting. However, it remains unclear whether TNF-α is responsible for the age-related losses in muscle size and function. Also, due to the high clearance rate of TNF-α from circulation, analyzing the circulating levels of soluble TNF-α receptors 1 and 2 (STNFR1 and STNFR2) may provide a better indication of inflammatory events. The aim of this study was to examine changes in circulating concentrations of TNF-α, STNFR1, and STNFR2 following acute eccentric exercise in young (YA) and middle-aged (MA) men...
October 14, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/29035994/prostate-specific-membrane-antigen-in-low-grade-fibromatosis
#12
Ramin Akbarian Aghdam, Masoumeh Hakiminejad, Hamidreza Hashemifard, Azadeh Rakhshan, Elahe Pirayesh
We report a case of fibromatosis demonstrating prostate-specific membrane antigen (PSMA)-positive scan. A 76-year-old man was under assessment because of rising prostate-specific antigen level. Bone scan showed abnormal soft tissue uptake of Tc-MDP adjacent to the right scapula, compatible with a mass in MRI, thereafter. Because of the unavailability of Ga-PSMA scan in our department and also high cost in other centers, the patient underwent Lu-PSMA for more assessment, which revealed PSMA-avid mass. Pathologic examination confirmed the diagnosis of low-grade fibromatosis...
December 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/29035420/modeling-the-secondary-structures-of-the-peptaibols-antiamoebin-i-and-zervamicin-ii-modified-with-d-amino-acids-and-proline-analogues
#13
Tarsila G Castro, Nuno M Micaêlo, Manuel Melle-Franco
Antiamoebin I (AAM-I) and zervamicin II (Zrv-IIB) are peptaibols that exert antibiotic activity through the insertion/disruption of cell membranes. In this study, we investigated how the folding of these peptaibols are affected when some of their native residues are replaced with proline analogues and asymmetrical D-α,α-dialkyl glycines (two classes of noncanonical amino acids). Systematic substitutions of native Aib, Pro, Hyp, and Iva residues were performed to elucidate the folding properties of the modified peptaibols incorporating noncanonical residues...
October 16, 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/29033192/chemical-affinity-of-10-methacryloyloxydecyl-dihydrogen-phosphate-to-dental-zirconia-effects-of-molecular-structure-and-solvents
#14
Ying Chen, Zhicen Lu, Mengke Qian, Huaiqin Zhang, Chen Chen, Haifeng Xie, Franklin R Tay
OBJECTIVES: To examine whether solvents and changing the molecular structure of 10-Methacryloyloxydecyl dihydrogen phosphate (10-MDP) affect its chemical affinity to Yttria-stabilized tetragonal zirconia polycrystals (Y-TZP). METHODS: The present work investigated the chemical affinity between Y-TZP and 10-MDP dissolved in different solvents (acetone/ethanol/water or mixture) using X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, and thermodynamic calculations...
October 13, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29028529/design-synthesis-and-immunological-evaluation-of-novel-amphiphilic-desmuramyl-peptides
#15
Farooq-Ahmad Khan, Marina Ulanova, Bing Bai, Damayanthi Yalamati, Zi-Hua Jiang
Muramyl dipeptide (MDP) - an essential bacterial cell wall component - is recognized by our immune system as pathogen-associated molecular pattern (PAMP) which results in immune responses with adverse toxic effects. In order to harness the beneficial properties from the pro-inflammatory characteristics of the bacterial cell wall motif, MDP was strategically re-designed while conserving the L-D configurations of the dipeptide moiety. The muramic acid was replaced with a hydrophilic arene and lipophilic chain was introduced at peptide end to give the amphiphilic desmuramyl peptides (DMPs)...
December 1, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28994791/subcellular-fractionation-for-erk-activation-upon-mitochondrial-derived-peptide-treatment
#16
Su-Jeong Kim, Jialin Xiao, Pinchas Cohen, Kelvin Yen
Mitochondrial-derived peptides (MDPs) are a new class of peptides that are encoded by small open reading frames within other known genes of the mitochondrial genome. MDPs have a wide variety of biological effects such as protecting neurons from apoptosis, improving metabolic markers, and protecting cells from chemotherapy. Humanin was the first MDP to be discovered and is the most studied peptide among the MDP family. The membrane receptors and downstream signaling pathways of humanin have been carefully characterized...
September 25, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28994250/synthesis-and-evaluation-of-a-novel-99m-tc-nitrido-radiopharmaceutical-with-alendronate-dithiocarbamate-as-a-potential-bone-imaging-agent
#17
Xiaoqing Song, Yue Wang, Junbo Zhang, Zhonghui Jin, Weifang Zhang, Yanyan Zhang
Currently, a popular strategy for designing novel radioprobes as bone imaging agents is based on the concept of bifunctional radiopharmaceticals. Considering the dithiocarbamate ligand can act as a suitable bifunctional linking agent to attach technetium-99m ((99m) Tc) to corresponding target molecules, in this study, alendronate dithiocarbamate (ALNDTC) was synthesized and radiolabeled with [(99m) Tc≡N](2+) core by ligand-exchange reaction to produce (99m) TcN-ALNDTC complex, for the potential use as a novel probe for bone imaging...
October 10, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28983807/relationship-between-tumor-volume-and-quantitative-values-calculated-using-two-dimensional-bone-scan-images
#18
Shota Hosokawa, Kazumasa Inoue, Yasuyuki Takahashi, Kazunori Kawakami, Daisuke Kano, Yoshihiro Nakagami, Masahiro Fukushi
The bone scan index (BSI) is calculated from a whole-body bone scan image; it shows the tumor burden in bone as a percentage of total skeletal mass. It has been used to determine the prognosis and to assess treatment effects; however, little has been reported on whether the BSI calculated using a two-dimensional image can accurately evaluate the three-dimensional spread in tumor volume. We investigated the relationship between tumor volume and BSI using Monte Carlo simulation (MCS). We simulated a gamma camera and constructed a voxel phantom based on an anthropomorphic phantom computed tomography (CT) image and gamma rays emitted from each part according to technetium-99m-labeled methylene diphosphonate ((99m)Tc-MDP) uptake (bone 1, soft tissue 0...
October 5, 2017: Radiological Physics and Technology
https://www.readbyqxmd.com/read/28976337/incidental-tc-99m-methylene-diphosphonate-uptake-in-an-active-thyroid-nodule
#19
Derya Çayır, Mine Araz, Şafak Akın, Melia Karaköse, Erman Çakal
Tc-99m-methylene diphosphonate (MDP) whole body scintigraphy is the method of choice for detection of metastatic bone diseases. It is primarily used to help diagnose various bone-related conditions such as primary or metastatic cancer of the bone, location of bone inflammation, and fractures that may not be visible on traditional X-ray images, as well as detection of bone damage due to infections and other conditions. In addition, bone scanning is often used for the follow-up or evaluation of response to treatment in some malignancies like prostate and breast cancers...
October 3, 2017: Molecular Imaging and Radionuclide Therapy
https://www.readbyqxmd.com/read/28976336/cyclosporine-and-vancomycin-amikacin-induced-hot-kidney-appearance-in-a-young-adult-and-a-pediatric-patient
#20
Derya Çayır, Mine Araz, Mustafa Filik, Mehmet Erdoğan
The appearance of a hot kidney on bone scintigraphy is rare and can be seen due to various factors. In our clinic, we observed hot kidney appearance in two patients to whom technetium-99m methylene diphosphonate (Tc-99m MDP) whole body scan has been performed: a young male adult at the age of 18 who was diagnosed with acute lymphocytic leukemia with a presumptive diagnosis of avascular necrosis, and a 9-year-old girl with cystitis for a pre-diagnosis of osteomyelitis. The first patient had a history of cyclosporine usage and the second patient was being treated with amikacin + vancomycin...
October 3, 2017: Molecular Imaging and Radionuclide Therapy
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