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Rishi Bali, Parveen Sharma, Priya Ghanghas, Niti Gupta, Jay Dutt Tiwari, Abhiroop Singh, Nitin Sapra, Disha Goyal
OBJECTIVE: To compare the efficacy of CRP and TLC as markers for monitoring the course of odontogenic space infections (OSI) in 50 patients. METHODS: A Clinical severity scale (CSS) was developed to grade the severity of infections in patients. Blood samples were taken preoperatively and postoperatively at day 1, day 2, day 3 and day 7 for measuring the levels of CRP and TLC. The trends of CRP and TLC were analysed against the CSS. The data was subjected to paired "t" test, ANOVA, Spearman rank correlation, Pearson's bivariate correlation as appropriate...
September 2017: Journal of Maxillofacial and Oral Surgery
Bashir S Shariat, Qinglin Meng, Abdus S Mahmud, Zhigang Wu, Reza Bakhtiari, Junsong Zhang, Fakhrodin Motazedian, Hong Yang, Gerard Rio, Tae-Hyun Nam, Yinong Liu
Functionally graded NiTi structures benefit from the combination of the smart properties of NiTi and those of functionally graded structures. This article provides experimental data for thermomechanical deformation behaviour of microstructurally graded, compositionally graded and geometrically graded NiTi alloy components, related to the research article entitled "Functionally graded shape memory alloys: design, fabrication and experimental evaluation" (Shariat et al., 2017) [1]. Stress-strain variation of microstructurally graded NiTi wires is presented at different heat treatment conditions and testing temperatures...
August 2017: Data in Brief
Asma Fatima, Ashok Kumar Talapaneni, Abdul Saleh, Safiya Sana, Arshad Hussain
INTRODUCTION: Tooth movement during orthodontic treatment is possible because of mechanical force-induced inflammation and remodelling in the periodontal ligament. Variation in the inflammatory response might be anticipated with initial aligning archwires of different composition. Myloperoxidase (MPO) is an enzyme found in neutrophil granules that represents an important marker of inflammation. The aim of this study was to measure MPO enzyme activity during initial alignment with orthodontic arch wires of different alloy types...
July 13, 2017: Journal of Orthodontics
Wangqin Song, Jie Zhu, Lvdan Liu, Guangming Liu
Macromolecular crowding could influence the binding affinity of the polyzwitterion-conjugated proteins. Herein, the hydrolysis of N-succinyl-Ala-Ala-Pro-Phe p-nitroanilide by the poly(carboxybetaine) conjugated α-chymotrypsin (PCT) was employed as a model system to investigate the modulation of the binding affinity of the polyzwitterion-conjugated proteins by the ion-specific effects in the crowded environments. In comparison with the bare α-chymotrypsin (BCT), the binding affinity of the PCT to the peptide is stronger in the dilute solutions but becomes weaker in the crowded environments...
July 11, 2017: Journal of Physical Chemistry. B
Quan-Ming Zhao, Xiao-Feng Gu, Li Cheng, De-Hong Feng
BACKGROUND: Patellar fractures account for approximately 1% of all fractures.Due to the patella's importance as regards the extensor mechanism, efforts should to be made to preserve the patella.Several operative treatment methods have been introduced for patella fractures. OBJECTIVES: This study aims to compare the clinical effect of a titanium cable tension band and nickel-titanium (NiTi) patella concentrator (NT-PC) in treating patella fractures. MATERIAL AND METHODS: Thirty-nine patients with patella fractures were enrolled in this retrospective study...
June 27, 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
Rodrigo Hitoshi Higa, José Fernando Castanha Henriques, Guilherme Janson, Murilo Matias, Karina Maria Salvatore de Freitas, Fernanda Pinelli Henriques, Manoela Fávaro Francisconi
BACKGROUND: The aim of this study was to compare the deflection force in conventional and thermally activated nickel-titanium (NiTi) wires in passive (Damon Q) and active (Bioquick) self-ligating brackets (SLB) and in conventional brackets (CB) tied by two different methods: elastomeric ligature (EL) and metal ligature (ML). METHODS: Two wire diameters (0.014 and 0.016 in.) and 10 specimens per group were used. The specimens were assembled in a clinical simulation device and tested in an Instron Universal Testing Machine, with a load cell of 10 N...
December 2017: Progress in Orthodontics
Yul Kim, Robert Love, Roy George
INTRODUCTION: The aim of this study was to evaluate the changes in the surface profile of rotary nickel-titanium (NiTi) files designed to prepare a glide path and conventional stainless steel (SS) hand files when used in extremely narrow canals both in clinical and experimental conditions. METHODS: This ex vivo/in vivo study used either SS #10 K hand files or the PathFile system (Dentsply Maillefer, Ballaigues, Switzerland) to establish a glide path in maxillary molars with narrow root canals (defined as canals that bound a #8 K-file at the working length)...
July 7, 2017: Journal of Endodontics
Bhuwan Saklecha, Pawankumar Dnyandeo Tekale, Shivprasad V Sonawane, Pratik Rajesh Shah, Harshal Ashok Patil
Correction of dental crowding can be achieved with several orthodontic procedures like extraction of teeth, proximal stripping etc. In contemporary orthodontic practice, resolution of incisor crowding is most commonly achieved by the use of canine lacebacks. This method takes time, requires frequent activations and taxes anchorage since it involves the "PULL" mechanics. In order to overcome these disadvantages, mostly the time factor, we devised a method of using open coil NiTi spring on 0.016" SS wire piggy backed on the 0...
May 2017: Journal of Clinical and Diagnostic Research: JCDR
Vibha Hegde, Laxmi Suresh Murkey
INTRODUCTION: The purpose of an endodontic obturation is to obtain a fluid tight hermetic seal of the entire root canal system. There has been an evolution of different materials and techniques to achieve this desired gap free fluid tight seal due to presence of anatomic complexity of the root canal system. AIM: To compare the microgap occurring in root canals obturated with hydrophilic versus hydrophobic systems using scanning electron microscope. MATERIALS AND METHODS: Sixty extracted human single-rooted premolars were decoronated, instrumented using NiTi rotary instruments...
May 2017: Journal of Clinical and Diagnostic Research: JCDR
Thimmanagowda N Patil, Prahlad A Saraf, Raghavendra Penukonda, Sneha S Vanaki, Laxmikant Kamatagi
INTRODUCTION: The preference and usage of nickel titanium rotary instruments varies from individual to individual based on their technique, experience with the rotary systems and the clinical situation. Very limited information is available to explain the adoption of changing concepts with respect to nickel titanium rotary instruments pertaining to the endodontists in India. AIM: The aim of this study was to conduct a questionnaire survey to acquire the knowledge concerning different NiTi rotary instruments and their usage techniques by endodontists in India...
May 2017: Journal of Clinical and Diagnostic Research: JCDR
David Donnermeyer, Clarissa Bunne, Edgar Schäfer, Till Dammaschke
OBJECTIVES: The objective of the study was to compare the retreatability of three calcium silicate-containing sealers (BioRoot RCS, MTA Fillapex, Endo C.P.M.) and an epoxy resin-based sealer (AH Plus) with different root canal instruments (Hedström files, Reciproc R40, Mtwo retreatment file R 25/.05 + Mtwo 40/.06, and F6 SkyTaper) concerning sealer remnants and retreatment time. MATERIALS AND METHODS: Root canals of 192 teeth were instrumented with Reciproc R40...
June 22, 2017: Clinical Oral Investigations
U Schürmann, C Chluba, N Wolff, D Smazna, R Lima de Miranda, P Junker, R Adelung, E Quandt, L Kienle
In situ measurements are a pivotal extension of conventional transmission electron microscopy (TEM). By means of the shape memory alloy NiTi thin film Functional Grids were produced for in situ straining as alternative or at least complement of expensive commercial holders. Due to the martensite-austenite transition temperature straining effects can be observed by use of customary heating holders in the range of 50 to 100°C. The grids can be produced in diversified designs to fit for different strain situations...
June 9, 2017: Ultramicroscopy
Natalia V Zamora, Robin Christensen, Niti Goel, Louise Klokker, Maria A Lopez-Olivo, Lars E Kristensen, Loreto Carmona, Vibeke Strand, Jeffrey R Curtis, Maria E Suarez-Almazor
OBJECTIVE: Outcomes important to patients are those that are relevant to their well-being, including quality of life, morbid endpoints, and death. These outcomes often occur over the longterm and can be identified in prospective longitudinal observational studies (PLOS). There are no standards for which outcome domains should be considered. Our overarching goal is to identify critical longterm outcome domains for patients with rheumatic diseases, and to develop a conceptual framework to measure and classify them within the scope of OMERACT Filter 2...
June 15, 2017: Journal of Rheumatology
Ciro R Felix, Hector Mauricio Casanova Navarro, Gustavo Vasconcelos Bastos Paulino, Leonardo Broetto, Melissa Fontes Landell
Yeast surveys associated with different bromeliads in north-eastern Brazil led to the proposal of two novel yeast species, Carlosrosaea hohenbergiae sp. nov. and Carlosrosaea aechmeae sp. nov., belonging to the Tremellales clade (Agaricomycotina, Basidiomycota). Analysis of the sequences of the internal transcribed spacer (ITS) region and D1/D2 domain of the LSU rRNA gene suggested an affinity with a phylogenetic lineage that includes recently reclassified Carlosrosaeavrieseae. Six isolates of the novel species were obtained from different bromeliad species collected in three Atlantic Forest fragments in Alagoas state, Brazil...
June 2017: International Journal of Systematic and Evolutionary Microbiology
Sandeep K Padamati, Davide Angelone, Apparao Draksharapu, Gloria Primi, David J Martin, Moniek Tromp, Marcel Swart, Wesley R Browne
A reactive high-valent dinuclear nickel(IV) oxido bridged complex is reported that can be formed at room temperature by reaction of [(L)2Ni(II)2(μ-X)3]X (X = Cl or Br) with NaOCl in methanol or acetonitrile (where L = 1,4,7-trimethyl-1,4,7-triazacyclononane). The unusual Ni(IV) oxido species is stabilized within a dinuclear tris-μ-oxido-bridged structure as [(L)2Ni(IV)2(μ-O)3](2+). Its structure and its reactivity with organic substrates are demonstrated through a combination of UV-vis absorption, resonance Raman, (1)H NMR, EPR, and X-ray absorption (near-edge) spectroscopy, ESI mass spectrometry, and DFT methods...
June 28, 2017: Journal of the American Chemical Society
Daisuke Tokita, Arata Ebihara, Kana Miyara, Takashi Okiji
INTRODUCTION: This study examined the dynamic fracture behavior of nickel-titanium rotary instruments in torsional or cyclic loading at continuous or reciprocating rotation by means of high-speed digital video imaging. METHODS: The ProFile instruments (size 30, 0.06 taper; Dentsply Maillefer, Ballaigues, Switzerland) were categorized into 4 groups (n = 7 in each group) as follows: torsional/continuous (TC), torsional/reciprocating (TR), cyclic/continuous (CC), and cyclic/reciprocating (CR)...
June 1, 2017: Journal of Endodontics
Petra Močnik, Tadeja Kosec, Janez Kovač, Milan Bizjak
Nickel-titanium and stainless steel are the most commonly used alloys for orthodontic treatments. Even though both are known to be resistant to corrosion, there are circumstances that can lead to undesired situations, like localized types of corrosion attack, wear during sliding of an archwire though brackets and breakdowns due to iatrogenic causes. The aim of this research was to analyse the influence of environmental effects on the corrosion and tribocorrosion properties of NiTi and stainless steel dental alloys...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Nitin Muralidharan, Casey N Brock, Adam P Cohn, Deanna Schauben, Rachel E Carter, Landon Oakes, D Greg Walker, Cary L Pint
The interplay between mechanical strains and battery electrochemistry, or the tunable mechanochemistry of batteries, remains an emerging research area with limited experimental progress. In this report, we demonstrate how elastic strains applied to vanadium pentoxide (V2O5), a widely studied cathode material for Li-ion batteries, can modulate the kinetics and energetics of lithium-ion intercalation. We utilize atomic layer deposition to coat V2O5 materials onto the surface of a shapememory superelastic NiTi alloy, which allows electrochemical assessment at a fixed and measurable level of elastic strain imposed on the V2O5, with strain state assessed through Raman spectroscopy and X-ray diffraction...
June 27, 2017: ACS Nano
Massoud Zolgharni, Madalina Negoita, Niti M Dhutia, Michael Mielewczik, Karikaran Manoharan, S M Afzal Sohaib, Judith A Finegold, Stefania Sacchi, Graham D Cole, Darrel P Francis
BACKGROUND: Correctly selecting the end-diastolic and end-systolic frames on a 2D echocardiogram is important and challenging, for both human experts and automated algorithms. Manual selection is time-consuming and subject to uncertainty, and may affect the results obtained, especially for advanced measurements such as myocardial strain. METHODS AND RESULTS: We developed and evaluated algorithms which can automatically extract global and regional cardiac velocity, and identify end-diastolic and end-systolic frames...
June 1, 2017: Echocardiography
Gregory Constantine, Neha Seth, Niti Chokshi, Charles G Minard, Danielle Guffey, Anthony P Olive, Carla M Davis
OBJECTIVES: Eosinophilic esophagitis (EoE) is a clinicopathologic disorder characterized by infiltration of eosinophils into the esophagus. Primary treatment approaches include topical corticosteroids and/or food elimination. The aim of the present study was to compare the effectiveness of combination therapy (topical corticosteroid plus test-based food elimination [FS]) with single therapy (topical corticosteroid [S] or test-based food elimination [F]). METHODS: Chart review of patients with EoE at Texas Children's Hospital (age <21 years) was performed...
June 2017: Journal of Pediatric Gastroenterology and Nutrition
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