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https://www.readbyqxmd.com/read/28340524/controlled-hydrothermal-synthesis-and-photoluminescence-of-nanocrystalline-znga2o4-cr-3-monospheres
#1
Tian Luan, Jinhan Liu, Xiaoxue Yuan, Ji-Guang Li
The hydrothermal synthesis of nanocrystalline ZnGa2O4:Cr(3+) (ZGC) red phosphor monospheres was accomplished in this work, and the effects of system pH, reactant content, reaction time, and citrate anions (Cit(3-)) on the phase and morphology evolution of the product were systematically studied. Under the optimized conditions of Cit(3-)/M = 1.0 molar ratio (M = total cations), pH = 5.0, and 0.2 mmol of Zn(2+), well-dispersed ZGC monospheres with an average diameter of ~454 ± 56 nm (average crystallite size ~15 nm) were successfully obtained via hydrothermal reaction at 180 °C for 18 h...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28339790/does-systemic-administration-of-casein-phosphopeptides-affect-orthodontic-movement-and-root-resorption-in-rats
#2
Lachlan Crowther, Gang Shen, Mohammed Almuzian, Allan Jones, William Walsh, Rema Oliver, Peter Petocz, Nour E Tarraf, M Ali Darendeliler
Objectives: To assess the potential effects of casein phosphopeptides (CPPs) on orthodontically induced iatrogenic root resorption (OIIRR) and orthodontic teeth movement. Materials and methods: Forty Wistar rats (aged 11 weeks) were randomly divided into experimental group (EG; n = 20) that received a diet supplemented with CPP and control group (CG; n = 20) devoid of diet supplement. A 150 g force was applied using nickel titanium (NiTi) coil that was bonded on maxillary incisors and extended unilaterally to a maxillary first molar...
January 25, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28339367/the-functional-significance-of-morphological-changes-in-the-dentitions-of-early-mammals
#3
Andrew J Conith, Michael J Imburgia, Alfred J Crosby, Elizabeth R Dumont
The Mesozoic marked a time of experimentation in the tooth morphology of early mammals. One particular experiment involved the movement of three points, or cusps, on the surface of a molar tooth from a line into a triangle. This transition is exemplified by two extinct insectivorous mammals, Morganucodon (cusps in a line) and Kuehneotherium (cusps in a triangle). Here we test whether this difference in cusp arrangement, alongside cusp heights and angles between cusps, is associated with differences in the ability of the teeth to fracture proxy-insect prey...
November 2016: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28338505/effects-of-hypertonic-saline-and-sodium-lactate-on-cortical-cerebral-microcirculation-and-brain-tissue-oxygenation
#4
Vlasta Dostalova, Jitka Schreiberova, Vlasta Dostalova, Jiri Paral, Jaroslav Kraus, Alena Ticha, Vera Radochova, Pavel Dostal
BACKGROUND: Hyperosmolar solutions have been used in neurosurgery to modify brain bulk. The aim of this animal study was to compare the short-term effects of equivolemic, equiosmolar solutions of hypertonic saline (HTS) and sodium lactate (HTL) on cerebral cortical microcirculation and brain tissue oxygenation in a rabbit craniotomy model. METHODS: Rabbits (weight, 1.5 to 2.0 kg) were anesthetized, ventilated mechanically, and subjected to a craniotomy. The animals were allocated randomly to receive a 3...
March 23, 2017: Journal of Neurosurgical Anesthesiology
https://www.readbyqxmd.com/read/28338318/iron-ii-complexes-with-scorpiand-like-macrocyclic-polyamines-kinetico-mechanistic-aspects-of-complex-formation-and-oxidative-dehydrogenation-of-coordinated-amines
#5
M Paz Clares, Laura Acosta-Rueda, Carmen E Castillo, Salvador Blasco, Hermas R Jiménez, Enrique García-España, Manuel G Basallote
The Fe(II) coordination chemistry of a pyridinophane tren-derived scorpiand type ligand containing a pyridine ring in the pendant arm is explored by potentiometry, X-ray, NMR, and kinetics methods. Equilibrium studies in water show the formation of a stable [FeL](2+) complex that converts to monoprotonated and monohydroxylated species when the pH is changed. A [Fe(H-2L)](2+) complex containing an hexacoordinated dehydrogenated ligand has been isolated, and its crystal structure shows the formation of an imine bond involving the aliphatic nitrogen of the pendant arm...
March 24, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28338300/%C3%A2-separated-root-canal-instruments-%C3%A2-an-overview-of-incidence-localisation-treatment-strategies-and-outcome%C3%A2
#6
Beat Suter
The dreaded fracture of a root canal instrument is in fact a rare adverse event. Most instrument fractures occur in molar teeth with the highest degree of root curvature. Various treatment options (leaving the fractured instrument with or without apicoectomy, bypassing or removing the fragment) and removing techniques (using ultrasonics, hollow tubes or bypassing and removing with debriders) are discussed. The clinical prognosis for teeth with fractured instruments is not necessarily compromised if appropriate further treatment is undertaken...
March 24, 2017: Swiss Dental Journal
https://www.readbyqxmd.com/read/28338226/exploring-and-modelling-impacts-of-third-molar-experience-on-quality-of-life-a-real-time-qualitative-study-using-twitter
#7
Kamal Hanna, Paul Sambrook, Jason M Armfield, David S Brennan
OBJECTIVES: This study had two objectives: (i) to explore and model domains describing the real-time impact of third molars (TMs) on quality of life (QoL); and (ii) to assess the percentage coverage, in some generic health-related quality of life (HRQoL) and oral health-related quality of life (OHRQoL) instruments, of the TM QoL domains identified in this study. METHODOLOGY: A global cross-sectional sample of tweets containing 'wisdom tooth' over a 1-week period retrieved 3,537 tweets...
March 24, 2017: International Dental Journal
https://www.readbyqxmd.com/read/28338038/school-based-dental-sealant-programmes-may-be-effective-in-caries-prevention
#8
Tarek Himida, Ucheka Promise
DesignSplit-mouth randomised controlled clinical trial.InterventionSchool-based dental sealant (SBDS) programme. The study population that was selected from 67-year-old pupils of 16 elementary schools in areas of low socioeconomic status within Nice, France. Children with first permanent molar pairs sufficiently erupted for sealing with no caries (ICDAS [International Caries Detection and Assessment System] 0) or initial enamel lesions (ICDAS 1-2) were included. Children were randomised to either the intervention group (light polymerised resin-based sealant with fluoride) or the control group (no treatment)...
March 2017: Evidence-based Dentistry
https://www.readbyqxmd.com/read/28338027/molar-incisor-hypomineralisation
#9
Greig D Taylor
Data sourcesThe Medline and Embase databases and hand searches in the journals International Journal of Paediatric Dentistry and European Archives of Paediatric Dentistry.Study selectionEnglish language cohort and case-control studies.Data extraction and synthesisStudy selection was carried out independently by two reviewers with data abstraction being conducted by a single reviewer and checked by a second reviewer. Risk of bias was assessed using a modified version of the Newcastle-Ottawa Scale (NOS). Adjusted (aOR) and unadjusted odds ratios (uOR), P-values and 95% confidence intervals (CI) were obtained from the studies...
March 2017: Evidence-based Dentistry
https://www.readbyqxmd.com/read/28338026/rubber-dam-may-increase-the-survival-time-of-dental-restorations
#10
William Keys, Susan J Carson
Data sourcesCochrane Oral Health's Trials Register, Cochrane Central Register of Controlled Trials (CENTRAL), Medline, Embase, LILACS, SciELO, Chinese BioMedical Literature Database, VIP, China National Knowledge Infrastructure, ClinicalTrials.gov, World Health Organization International Clinical Trials Registry Platform, OpenGrey and Sciencepaper Online databases. Handsearches in a number of journals.Study selectionRandomised controlled trials, including split-mouth studies assessing the effects of rubber dam isolation for restorative treatments in dental patients...
March 2017: Evidence-based Dentistry
https://www.readbyqxmd.com/read/28337899/substance-p-expression-in-the-gingival-tissue-after-upper-third-molar-extraction-effect-of-ketoprofen-a-preliminary-study
#11
G M Abbate, A Mangano, P Sacerdote, G Amodeo, G Moschetti, L Levrini
The aim of this study was to evaluate substance P (SP) levels and the effect of a non-steroidal anti-inflammatory drug (NSAID), ketoprofen, on SP in the pericoronal gingival tissue after extraction of upper third molars. A sample of 20 young non-smoking systemically healthy adults of both sexes, with a healthy upper third molar to extract for orthodontic purposes, was selected. After extraction, a sample of the gingival tissue of the pericoronal region was collected with a sterile scalpel, placed into test tubes and kept frozen at -20°C until the SP determination...
January 2017: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28337620/date-palm-waste-derived-biochar-composites-with-silica-and-zeolite-synthesis-characterization-and-implication-for-carbon-stability-and-recalcitrant-potential
#12
Munir Ahmad, Mahtab Ahmad, Adel R A Usman, Abdullah S Al-Faraj, Adel Abduljabbar, Yong Sik Ok, Mohammad I Al-Wabel
Engineered organo-mineral composites were synthesized from date palm waste biochar and silica or zeolite via mechanochemical treatments. Date palm tree rachis (leaves) waste biomass was pre-treated with silica or zeolite minerals via ball milling and sonication prior to pyrolysis at 600 °C. The resultant organo-mineral composites and pristine materials were characterized using X-ray diffraction, thermogravimetric-differential thermal (TG-DTA), Fourier transform infrared, scanning electron microscope analyses and surface area and porosity analyzer to investigate the variations in physiochemical and structural characteristics...
March 23, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28337571/effects-of-feeding-ground-pods-of-enterolobium-cyclocarpum-jacq-griseb-on-dry-matter-intake-rumen-fermentation-and-enteric-methane-production-by-pelibuey-sheep-fed-tropical-grass
#13
S Albores-Moreno, J A Alayón-Gamboa, A J Ayala-Burgos, F J Solorio-Sánchez, C F Aguilar-Pérez, L Olivera-Castillo, J C Ku-Vera
An experiment was carried out to determine the effect of supplementing ground pods of Enterolobium cyclocarpum in a basal ration of Pennisetum purpureum grass on feed intake, rumen volatile fatty acids (VFAs), and protozoa and methane (CH4) production by hair sheep. Four male sheep (Pelibuey × Katahdin) with a mean live weight of 27.0 kg (SD ± 0.5) were supplemented with 0.00, 0.15, 0.30, and 0.45 kg of dry matter (DM) of E. cyclocarpum pods daily; equivalent to 0.00, 4.35, 8.70, and 13.05 g of crude saponins, respectively...
March 23, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28337423/immediate-changes-in-the-mandibular-dentition-after-maxillary-molar-distalization-using-headgear
#14
Sung-Ja Kang, Hyun-Hee Kim, Hyeon-Shik Hwang, Kyung-Min Lee
The purpose of this study was to investigate immediate changes in the mandibular dentition after maxillary molar distalization using headgear in non-growing patients. Sixteen patients (mean age, 18.9 ± 2.0 years) with Class II molar relationship and crowding were included in the present study. To correct the molar relationship, headgear was used for maxillary molar distalization. Cone-beam computed tomography-generated half-cephalograms (CG Cephs) and dental casts were used to evaluate dental changes for each subject before and immediately after molar distalization using headgear...
March 2017: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/28337421/zygomatic-miniplates-for-skeletal-anchorage-in-orthopedic-correction-of-class-iii-malocclusion-a-controlled-clinical-trial
#15
Erdal Bozkaya, Alime Sema Yüksel, Süleyman Bozkaya
OBJECTIVE: To evaluate the effects of facemask therapy, which was anchored from the zygomatic buttresses of the maxilla by using two miniplates, in skeletal Class III patients with maxillary deficiency. METHODS: Eighteen skeletal Class III patients (10 girls and 8 boys; mean age, 11.4 ± 1.28 years) with maxillary deficiency were treated using miniplate-anchored facemasks, and their outcomes were compared with those of a Class III control group (9 girls and 9 boys; mean age, 10...
March 2017: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/28337417/skeletal-and-dentoalveolar-changes-after-miniscrew-assisted-rapid-palatal-expansion-in-young-adults-a-cone-beam-computed-tomography-study
#16
Jung Jin Park, Young-Chel Park, Kee-Joon Lee, Jung-Yul Cha, Ji Hyun Tahk, Yoon Jeong Choi
OBJECTIVE: The aim of this study was to evaluate the skeletal and dentoalveolar changes after miniscrew-assisted rapid palatal expansion (MARPE) in young adults by cone-beam computed tomography (CBCT). METHODS: This retrospective study included 14 patients (mean age, 20.1 years; range, 16-26 years) with maxillary transverse deficiency treated with MARPE. Skeletal and dentoalveolar changes were evaluated using CBCT images acquired before and after expansion. Statistical analyses were performed using paired t-test or Wilcoxon signed-rank test according to normality of the data...
March 2017: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/28337349/a-rational-approach-to-sinus-augmentation-the-low-window-sinus-lift
#17
Terry Zaniol, Alex Zaniol
Sinus augmentation is a well-known approach to treating alveolar bone ridge atrophy in the posterior maxilla. The preparation of the lateral window is crucial. Its size, design, and position in the vestibular sinus wall may affect the intra- and postsurgical complication rates and affect the intrasurgical activity of both surgeons and assistants. The present paper describes a rational technique that also exploits the guided surgery approach for design and preparation of a lateral window for sinus augmentation, the Low Window Sinus Lift...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28337278/synthesis-of-huaicarbon-a-b-and-their-activating-effects-on-platelet-glycoprotein-vi-receptor-to-mediate-collagen-induced-platelet-aggregation
#18
Hongli Yu, Yeqing Chen, Hao Wu, Kuilong Wang, Liping Liu, Xingde Zhang
Quercetin and rhamnose were efficiently converted into huaicarbon A/B by heating at 250°C for 10-15 min or at 200°C for 25-30 min. With the optimum molar ratio of quercetin/rhamnose (1:3), huaicarbon A and B yields reached 25% and 16% respectively after heating at 250°C, with 55% quercetin conversion. Huaicarbon A/B both promoted washed platelet aggregation dose-dependently, which was antagonized by an inhibitor of glycoprotein VI (GPVI) receptor. Similarly, they both promoted collagen-induced platelet aggregation in platelet-rich plasma in dose-dependent manners...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28337002/a-case-series-of-trigeminal-nerve-injuries-caused-by-periapical-lesions-of-mandibular-teeth
#19
M Devine, Z Yilmaz, M Hirani, T Renton
Aims Periapical lesions have been implicated in mandibular trigeminal sensory neuropathy. This study aimed to report on a case series of consecutive patients presenting with mandibular division trigeminal nerve injuries (TNI) caused by periapical lesions. Common presenting characteristics and possible strategies for management were also investigated.Materials and methods A retrospective study of 22 patients with TNI caused by periapical lesions. Data were extracted from patient records and analysed using Microsoft Excel and SPSS...
March 24, 2017: British Dental Journal
https://www.readbyqxmd.com/read/28336976/the-hall-technique-10-years-on-questions-and-answers
#20
N P T Innes, D J P Evans, C C Bonifacio, M Geneser, D Hesse, M Heimer, M Kanellis, V Machiulskiene, J Narbutaité, I C Olegário, A Owais, M P Araujo, D P Raggio, C Splieth, E van Amerongen, K Weber-Gasparoni, R M Santamaria
It is ten years since the first paper on the Hall Technique was published in the British Dental Journal and almost 20 years since the technique first came to notice. Dr Norna Hall a (now retired) general dental practitioner from the north of Scotland had, for many years, been managing carious primary molar teeth by cementing preformed metal crowns over them, with no local anaesthesia, tooth preparation or carious tissue removal. This first report, a retrospective analysis of Dr Hall's treatments, caused controversy...
March 24, 2017: British Dental Journal
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