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https://www.readbyqxmd.com/read/29039965/scanning-electron-microscope-comparative-surface-evaluation-of-glazed-lithium-disilicate-ceramics-under-different-irradiation-settings-of-nd-yag-and-er-yag-lasers
#1
Josko Viskic, Drazen Jokic, Suzana Jakovljevic, Lana Bergman, Sladana Milardovic Ortolan, Senka Mestrovic, Ketij Mehulic
OBJECTIVE: To evaluate the surface of glazed lithium disilicate dental ceramics after irradiation under different irradiation settings of Nd:YAG and Er:YAG lasers using a scanning electron microscope (SEM). MATERIALS AND METHODS: Three glazed-press lithium disilicate ceramic discs were treated with HF, Er:YAG, and Nd:YAG, respectively. The laser-setting variables tested were laser mode, repetition rate (Hz), power (W), time of exposure (seconds), and laser energy (mJ)...
October 17, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/29036158/parabasal-formulas-and-their-applications
#2
Sunggoo Cho
Parabasal theory is a technique in geometrical optics, which describes the behavior of light rays located near some defined base ray rather than the optical axis. In this work, we are concerned with parabasal rays, which lie in a sufficiently small neighborhood of a chief ray and develop some formulas for the parabasal quantities of the chief ray. The parabasal quantities of a chief ray are shown to be intimately related to the coefficients of the first-order differential equations of the chief ray. Using the relations, we derive parabasal formulas containing parabasal refractive indices and parabasal powers from the first-order differential equations...
September 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/29034417/age-estimation-of-chinese-children-based-on-second-molar-maturity
#3
Yu-Cheng Guo, Guang Chu, Andreas Olze, Sven Schmidt, Ronald Schulz, Christian Ottow, Heidi Pfeiffer, Teng Chen, Andreas Schmeling
In forensic medicine and many other fields, age estimation by the use of teeth is of great importance for the purpose of individual identification. In the past, however, age estimation based on the second molar mineralization was scarcely performed. In this study, a total of 1657 panoramic radiographs taken from 834 males and 823 females of northern Chinese origin in the age bracket 5 to 25 years were assessed. The mineralization status of the second molars was determined using the classification described by Demirjian et al...
October 15, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/29034076/accessibility-to-health-services-among-migrant-workers-in-the-northeast-of-thailand
#4
Suprawee Khongthanachayopit, Wongsa Laohasiriwong
Background. There is an increasing trend of trans-border migration from neighboring countries to Thailand. According to human rights laws, everyone must have access to health services, even if they are from other nationalities.  However, a small minority of health personnel in Thailand discriminate against immigrant workers, as they are from a lower financial bracket. Methods. This cross-sectional study aims to determine the prevalence of accessibility to health services and factors associated with access to health services among migrant workers who work along the Northeast border of Thailand...
2017: F1000Research
https://www.readbyqxmd.com/read/29033256/acoustic-analysis-of-normal-voice-patterns-in-pakistani-adults
#5
Saira Ambreen, Nazia Bashir, Sharmeen Aslam Tarar, Rukhsana Kausar
This study was designed to find out normative acoustic measures of adults in Pakistan. Age and gender differences in these parameters were also studied. The study variables include fundamental frequency, absolute jitter, relative jitter, relative average perturbation, 5-point period perturbation quotient perturbation quotient, jitter average absolute difference between consecutive periods, divided by the average period, shimmer local, shimmer decibel, three-point amplitude perturbation quotient, five-point amplitude perturbation quotient, average absolute difference of consecutive differences between the consecutive periods' amplitudes, and harmonics-to-noise ratio...
October 12, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/29032048/cytokine-profile-changes-in-gingival-crevicular-fluid-after-placement-different-brackets-types
#6
Ana Zilda Nazar Bergamo, Paulo Nelson-Filho, Cássio do Nascimento, Renato Corrêa Viana Casarin, Márcio Zaffalon Casati, Marcela Cristina Damião Andrucioli, Érika Calvano Kuchler, Daniele Lucca Longo, Léa Assed Bezerra da Silva, Mírian Aiko Nakane Matsumoto
OBJECTIVE: The aim of this study was to examine the relationship between bracket design and ratio of five proinflammatory cytokine, in gingival crevicular fluid (GCF), and bacterial adhesion without tooth movement influence. DESIGN: The sample was comprised of 20 participants, aged 11 to 15 years old (mean age: 13.3 years±1.03). A conventional Gemini™ metallic bracket and two self-ligating brackets, In-Ovation(®)R and SmartClip™, were bonded to the maxillary incisors and canines...
September 25, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29031908/intrauterine-air-impairs-embryonic-postimplantation-development-in-mice
#7
Ruonan Liu, Yimeng Li, Yanping Miao, Yanhui Wei, Mo Guan, Rongyan Zhou, Xiangyun Li
OBJECTIVE: Although most embryologists load air bubbles into the catheter along with embryos during embryo transfer, the effects of these air bubbles on embryo transfer success rate are not clear. STUDY DESIGN: Air bubbles were nonsurgically injected into unilateral uterine horns of mice to demonstrate the negative effects of intrauterine air bubbles on embryonic development. RESULTS: Our data showed that when air bubbles are nonsurgically injected into unilateral uterine horns of pregnant 4days mice the litter size is significantly decreased...
October 10, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29029277/mir-122-release-in-exosomes-precedes-overt-tolvaptan-induced-necrosis-in-a-primary-human-hepatocyte-micropatterned-coculture-model
#8
Merrie Mosedale, J Scott Eaddy, O Joseph Trask, Natalie S Holman, Kristina K Wolf, Edward LeCluyse, Brenton R Ware, Salman R Khetani, Jingtao Lu, William J Brock, Sharin E Roth, Paul B Watkins
Idiosyncratic drug-induced liver injury (IDILI) is thought to often result from an adaptive immune attack on the liver. However, it has been proposed that the cascade of events culminating in an adaptive immune response begins with drug-induced hepatocyte stress, release of exosomal danger signals, and innate immune activation, all of which may occur in the absence of significant hepatocelluar death. A micropatterned coculture model (HepatoPac®) was used to explore the possibility that changes in exosome content precede overt necrosis in response to the IDILI drug tolvaptan...
September 28, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29026267/control-of-reaction-diffusion-equations-on-time-evolving-manifolds
#9
Francesco Rossi, Nastassia Pouradier Duteil, Nir Yakoby, Benedetto Piccoli
Among the main actors of organism development there are morphogens, which are signaling molecules diffusing in the developing organism and acting on cells to produce local responses. Growth is thus determined by the distribution of such signal. Meanwhile, the diffusion of the signal is itself affected by the changes in shape and size of the organism. In other words, there is a complete coupling between the diffusion of the signal and the change of the shapes. In this paper, we introduce a mathematical model to investigate such coupling...
December 2016: Proceedings of the ... IEEE Conference on Decision & Control
https://www.readbyqxmd.com/read/29019522/-regional-inequalities-in-mortality-from-diabetes-mellitus-and-access-to-health-in-argentina
#10
María Jimena Marro, Andrey Moreira Cardoso, Iuri da Costa Leite
The aim of this study was to estimate the mortality burden according to major groups of causes, with a focus on diabetes mellitus, as well as differences according to the presence or absence of health coverage for Argentina as a whole and its regions. The study used the mortality database for individuals 30 years or older in 2009-2011, stratified by sex, age bracket, region, underlying cause of death, and health coverage. We calculated the mortality rates and years of life lost due to premature mortality (YLLs)...
October 9, 2017: Cadernos de Saúde Pública
https://www.readbyqxmd.com/read/29016985/the-effect-of-various-adhesives-enamel-etching-and-base-treatment-on-the-failure-frequency-of-customized-lingual-brackets-a-randomized-clinical-trial
#11
Dimitrios Mavreas, Jean-François Cuzin, Guillaume Boonen, Bart Vande Vannet
Objectives: The aim of this paper was to compare failure differences in precious metal customized lingual brackets bonded with three adhesive systems. Also, differences in failure of non-precious metal brackets with and without a silicatized base layer bonded with the same adhesive, as well as the influence of enamel etching prior to using a self-etching dual cure resin were explored. Materials/methods: Five different groups were defined in a semi-randomized approach...
July 10, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/29016236/effects-of-445-nm-diode-laser-assisted-debonding-of-self-ligating-ceramic-brackets-on-shear-bond-strength
#12
Steffen Stein, Andreas Hellak, Michael Schauseil, Heike Korbmacher-Steiner, Andreas Braun
OBJECTIVES: The aim of this study was to measure the effect of irradiation with a novel 445-nm diode laser on the shear bond strength (SBS) of ceramic brackets before debonding. MATERIALS AND METHODS: Thirty ceramic brackets (In-Ovation(®) C, GAC) were bonded in standard manner to the planed and polished buccal enamel surfaces of 30 caries-free human third molars. Each tooth was randomly allocated to the laser or control group, with 15 samples per group. The brackets in the laser group were irradiated with the diode laser (SIROLaser Blue(®); Sirona) on three sides of the bracket bases for 5 sec each (lateral-coronal-lateral, a total of 15 sec) immediately before debonding...
October 10, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28989128/mechanical-and-physical-properties-of-two-different-resin-based-materials-a-comparative-study
#13
Hosam Baeshen, Basem N Alturki, Wjoud W Albishi, Fahad M Alsadi, Khaled M El-Tubaigy
AIM: The purpose of this study was to evaluate the degree of conversion (DC) of two different resin-based composite materials (nanofill composite and ormocer) and correlate it with some mechanical properties of these two restorative materials. MATERIALS AND METHODS: Two different resin-based materials (Filtek Supreme XT and Admira) were tested. A total of 30 samples of each type of selected composite were prepared. Specimens were immersed in distilled water for 24 hours...
October 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28986318/development-and-implementation-of-an-advanced-model-predictive-control-system-into-continuous-pharmaceutical-tablet-compaction-process
#14
Aparajith Bhaskar, Fernando N Barros, Ravendra Singh
In the context of continuous pharmaceutical oral dosage manufacturing, a control system is essential to ensure that the critical quality attributes (CQAs) are maintained within the regulatory constraints by mitigating variations generated in upstream operations. Such a system is essential to the Quality by Design (QbD) paradigm shift, which can ensure that predefined end quality attributes are achieved within an optimal economic and time bracket. In this work, an advanced model predictive control (MPC) architecture integrated with a novel real-time tablet weight measurement method has been development and implemented into a continuous direct compaction tablet manufacturing pilot-plant...
October 3, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28984633/homeopathy-as-boundary-object-and-distributed-therapeutic-agency-a-discussion-on-the-homeopathic-placebo-response
#15
Cosima Rughiniş, Alexandra Ciocănel, Sorina Vasile
BACKGROUND: We discuss homeopathy's placebo effect as the result of a distributed therapeutic agency involving humans, objects, and texts. Homeopathy has been involved in controversies for centuries, and the dispute whether it is therapy or quackery is as lively as ever. Still, homeopathy has retained significant popularity and acceptance within the medical establishment. AREAS OF UNCERTAINTY: We bracket the issue of biochemical effectiveness of homeopathic remedies as we only discuss homeopathy's potential to elicit a placebo response within its therapeutic alliance, in virtue of its social, symbolic, and material features...
September 27, 2017: American Journal of Therapeutics
https://www.readbyqxmd.com/read/28977778/novel-translucent-and-strong-submicron-alumina-ceramics-for-dental-restorations
#16
M Zhao, Y Sun, J Zhang, Y Zhang
An ideal ceramic restorative material should possess excellent aesthetic and mechanical properties. We hypothesize that the high translucency and strength of polycrystalline ceramics can be achieved through microstructural tailoring. The aim of this study is to demonstrate the superior optical and mechanical properties of a new class of submicron grain-sized alumina ceramics relative to the current state-of-the-art dental ceramic materials. The translucency, the in-line transmission ( TIT) in particular, of these submicron alumina ceramics has been examined with the Rayleigh-Gans-Debye light-scattering model...
October 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28977585/a-study-of-malaria-parasite-density-in-hiv-1-positive-under-fives-in-benin-city-nigeria
#17
Ikechukwu Okonkwo, Michael Ibadin, Wilson Sadoh, Austine Omoigberale
Background: Human immunodeficiency virus (HIV) and malaria are leading causes of morbidity and mortality among under-fives in sub-Saharan Africa. HIV infection could affect development of antimalarial immunity by impaired parasite clearance with predisposition to higher malaria parasitaemia. Objective: The objective of this study is to assess asymptomatic malaria parasite density (AMPD) in HIV-1-infected under-fives in a holoendemic zone. Methods: HIV-1-positive and -negative children <5 years on follow-up care were recruited and AMPD and CD4 counts were determined...
September 14, 2017: Journal of Tropical Pediatrics
https://www.readbyqxmd.com/read/28966888/ecomorphological-characterization-of-murines-and-non-arvicoline-cricetids-rodentia-from-south-western-europe-since-the-latest-middle-miocene-to-the-mio-pliocene-boundary-mn-7-8-mn13
#18
Ana R Gomez Cano, Yuri Kimura, Fernando Blanco, Iris Menéndez, María A Álvarez-Sierra, Manuel Hernández Fernández
Rodents are the most speciose group of mammals and display a great ecological diversity. Despite the greater amount of ecomorphological information compiled for extant rodent species, studies usually lack of morphological data on dentition, which has led to difficulty in directly utilizing existing ecomorphological data of extant rodents for paleoecological reconstruction because teeth are the most common or often the only micromammal fossils. Here, we infer the environmental ranges of extinct rodent genera by extracting habitat information from extant relatives and linking it to extinct taxa based on the phenogram of the cluster analysis, in which variables are derived from the principal component analysis on outline shape of the upper first molars...
2017: PeerJ
https://www.readbyqxmd.com/read/28966064/in%C3%A2-vitro-assessment-of-stainless-steel-orthodontic-brackets-coated-with-titanium-oxide-mixed-ag-for-anti-adherent-and-antibacterial-properties-against-streptococcus-mutans-and-porphyromonas-gingivalis
#19
Eman Jameel Fatani, Hamed H Almutairi, Ali O Alharbi, Yasser Obaidallah Alnakhli, Darshan Devang Divakar, Muzaheed, Abdulaziz Abdullah Alkheraif, Aftab Ahmed Khan
Orthodontic brackets made from stainless steel were introduced in dentistry, though they have less ability in reducing enamel demineralization and are not successful in preventing microbial as well as biofilm growth. In this study, we evaluated the significant role of different brackets in reducing enamel demineralization indirectly. Results from different tests indicate the significant reduction in adhesion, biofilm formation and slow growth of tested bacterial species on brackets coated with Ag + TiO2 and found to be statistically significant lower than control...
September 29, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28960805/a-systematic-tandem-mass-spectrometric-study-of-anion-attachment-for-improved-detection-and-acidity-evaluation-of-nitrogen-rich-energetic-compounds
#20
Gabriel Gaiffe, Maxime C Bridoux, Christine Costanza, Richard B Cole
The development of rapid, efficient and reliable detection methods for the characterization of energetic compounds is of high importance to security forces concerned with terrorist threats. Using a mass spectrometric approach, characteristic ions can be produced by attaching anions to analyte molecules in the negative ion mode of electrospray ionization mass spectrometry (ESI-MS). Under optimized conditions, formed anionic adducts can be detected with higher sensitivities as compared to the deprotonated molecules...
September 28, 2017: Journal of Mass Spectrometry: JMS
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