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https://www.readbyqxmd.com/read/28196289/what-happens-to-unprepared-root-canal-walls-a-correlative-analysis-using-micro-computed-tomography-and-histology-scanning-electron-microscopy
#1
J F Siqueira, A R Pérez, M F Marceliano-Alves, J C Provenzano, S G Monteros, F R Pires, G C S Vieira, I N Rôças, F R F Alves
AIM: To microscopically examine the cleaning conditions of root canal walls that remained unprepared as revealed by micro-CT. METHODOLOGY: The root canals of 10 freshly extracted mandibular premolars with necrotic pulps and apical periodontitis along with the mesiobuccal canals of 11 mandibular molars with vital pulps were prepared using Reciproc instruments R40 and R25, respectively, and 2.5% sodium hypochlorite irrigation. Specimens were scanned in micro-CT before and after preparation and the unprepared areas were identified...
February 14, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28131415/blue-thermomechanical-treatment-optimizes-fatigue-resistance-and-flexibility-of-the-reciproc-files
#2
Gustavo De-Deus, Emmanuel João Nogueira Leal Silva, Victor Talarico Leal Vieira, Felipe Gonçalves Belladonna, Carlos Nelson Elias, Gianluca Plotino, Nicola Maria Grande
INTRODUCTION: The aim of the present study was to evaluate the influence of Blue thermal treatment on the bending resistance and cyclic fatigue of conventional M-Wire Reciproc files (VDW, Munich, Germany). The roughness pattern and the microhardness of the files were also assessed. METHODS: Flexibility of standard Reciproc R25 files and the corresponding Blue prototypes was determined by 45° bending tests according to the ISO 3630-1 specification. Instruments were also subjected to cyclic fatigue resistance, measuring the time to fracture in an artificial stainless steel canal with a 60° angle and a 5-mm radius of curvature...
January 25, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28064401/the-national-cancer-institute-r25-cancer-education-grants-program-a-workshop-report
#3
REVIEW
Jeannette F Korczak, Davyd W Chung, Erica Rosemond, Daniel D Von Hoff, Richard L Haspel, John W Waterbor, Shine Chang, Amelie G Ramirez, Susan Perkins, Jonathan Wiest, Ming Lei
Through the R25 Cancer Education Grants Program (CEGP), the National Cancer Institute (NCI) has been supporting the broad educational needs of the cancer research and cancer healthcare communities since 1974. NCI sponsored a workshop on September 13, 2016 in Bethesda, Maryland, with the objectives of sharing best practices in cancer education, communicating R25 CEGP programmatic information, and gathering ideas to strengthen the R25 CEGP to better meet the emerging needs in cancer education in the face of a rapidly changing landscape in cancer research and cancer care...
March 2017: Journal of Cancer Education: the Official Journal of the American Association for Cancer Education
https://www.readbyqxmd.com/read/28053322/vav1-regulates-experimental-autoimmune-arthritis-and-is-associated-with-anti-ccp-negative-rheumatoid-arthritis
#4
A O Guerreiro-Cacais, U Norin, A Gyllenberg, R Berglund, A D Beyeen, E Petit-Teixeira, F Cornélis, A Saoudi, G J Fournié, R Holmdahl, L Alfredsson, L Klareskog, M Jagodic, T Olsson, I Kockum, L Padyukov
Rheumatoid arthritis (RA) patients can be stratified into two subgroups defined by the presence or absence of antibodies against citrullinated circular peptides (anti-CCP) with most of the genetic association found in anti-CCP positive RA. Here we addressed the role of VAV1, previously associated to multiple sclerosis (MS), in the pathogenesis of RA in experimental models and in a genetic association study. Experimental arthritis triggered by pristane or collagen type II was induced in DA rats and in the DA...
January 5, 2017: Genes and Immunity
https://www.readbyqxmd.com/read/28046345/su-f-r-26-prognostic-radiomics-of-breast-cancer-on-dce-and-dwi-mr-images
#5
N Maforo, H Li, L Lan, A Edwards, M L Giger
PURPOSE: For this study, we investigated quantitative radiomics of breast tumors on diffusion weighted imaging and dynamic contrast-enhanced MRIs in the task of assessing the prognostic status of breast cancers. METHODS: Our IRB-approved, retrospectively-collected dataset included 316 breast cancers with 235 ER+ and 81 ER- cases. All images were acquired during clinical breast MRI incorporating dynamic-contrast MRI and diffusion-weighted MRI. Phenotypic categories extracted quantitatively from DCE-MRI included tumor size, shape, margin sharpness, enhancement texture, kinetics, and variance kinetics, and from DWI-DCE ADC features (average, range, variation) for DWI...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/27974651/consistent-leaf-respiratory-response-to-experimental-warming-of-three-north-american-deciduous-trees-a-comparison-across-seasons-years-habitats-and-sites
#6
Xiaorong Wei, Kerrie M Sendall, Artur Stefanski, Changming Zhao, Jihua Hou, Roy L Rich, Rebecca A Montgomery, Peter B Reich
Most vascular plants acclimate respiration to changes in ambient temperature, but explicit tests of these responses in field settings are rare, and how acclimation responses vary in space and time is relatively unstudied, hindering our ability to predict respiratory release of carbon under future climatic conditions. We measured temperature response curves of leaf respiration for three deciduous tree species from 2009 to 2012 in a field warming experiment (+3.4 °C above ambient) in both open and understory conditions at two sites in the southern boreal forest in Minnesota, USA...
December 14, 2016: Tree Physiology
https://www.readbyqxmd.com/read/27965498/shaping-ability-of-protaper-next-waveone-and-reciproc-in-simulated-root-canals
#7
E M Maia Filho, R M Dos Reis Santos, Darlon M Lima, S M da Silva Pereira, Janir A Soares, R R de Jesus Tavarez, Meire C Ferreira, Ceci N Carvalho, Matheus C Bandeca, Mateus R Tonetto, Alvaro H Borges, C de Castro Rizzi
INTRODUCTION: The study aimed to compare the shaping and preservation of the original curvature of simulated curved root canals using the following instruments: Reciproc (Rcp), WaveOne (Wo), and the ProTaper Next system (Ptn). MATERIALS AND METHODS: A total of 45 resin blocks with simulated curved root canals were divided into three groups (n = 15), prepared using the Rcp (R25), Wo (25/0.8), and Ptn (X2) instruments. Standardized photographs were taken before and after canal instrumentation...
November 1, 2016: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/27917509/effect-of-solvents-on-apically-extruded-debris-and-irrigant-during-root-canal-retreatment-using-reciprocating-instruments
#8
C Keskin, E Sariyilmaz, O Sariyilmaz
AIM: To evaluate the effect of several solvents on the weight of apically extruded debris and irrigant during retreatment using a novel agar gel model. METHODS: Orange oil, turpentine oil and chloroform were used as solvents. Eighty single straight rooted extracted human mandibular premolar teeth with a single root canal were divided into four groups (n=20). All specimens were root canal filled and weighed prior to their insertion I a prepared 1.5% agar gel model...
December 5, 2016: International Endodontic Journal
https://www.readbyqxmd.com/read/27847752/screw-in-forces-during-instrumentation-by-various-file-systems
#9
Jung-Hong Ha, Sang Won Kwak, Sung-Kyo Kim, Hyeon-Cheol Kim
OBJECTIVES: The purpose of this study was to compare the maximum screw-in forces generated during the movement of various Nickel-Titanium (NiTi) file systems. MATERIALS AND METHODS: Forty simulated canals in resin blocks were randomly divided into 4 groups for the following instruments: Mtwo size 25/0.07 (MTW, VDW GmbH), Reciproc R25 (RPR, VDW GmbH), ProTaper Universal F2 (PTU, Dentsply Maillefer), and ProTaper Next X2 (PTN, Dentsply Maillefer, n = 10). All the artificial canals were prepared to obtain a standardized lumen by using ProTaper Universal F1...
November 2016: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/27776886/bending-resistance-and-cyclic-fatigue-life-of-reciproc-unicone-and-waveone-reciprocating-instruments
#10
Emmanuel João Nogueira Leal Silva, Laise Silva Villarino, Victor Talarico Leal Vieira, Thais Accorsi-Mendonça, Henrique Dos Santos Antunes, Gustavo De-Deus, Hélio Pereira Lopes
INTRODUCTION: This study evaluated the bending resistance and cyclic fatigue life of a new single-file reciprocating instrument (Unicone; Medin, Nové Město na Moravě, Czech Republic). Reciproc (VDW, Munich, Germany) and WaveOne (Dentsply Maillefer) instruments were used as references for comparison. METHODS: Flexibility was determined by 45° bending tests using a universal testing machine. The cyclic fatigue test was performed using a custom-made device. For this test, an artificial canal with a 60° angle and a 5-mm radius of curvature was used...
December 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27734282/automated-literature-searches-for-longitudinal-tracking-of-cancer-research-training-program-graduates
#11
Luz A Padilla, Renee A Desmond, C Michael Brooks, John W Waterbor
A key outcome measure of cancer research training programs is the number of cancer-related peer-reviewed publications after training. Because program graduates do not routinely report their publications, staff must periodically conduct electronic literature searches on each graduate. The purpose of this study is to compare findings of an innovative computer-based automated search program versus repeated manual literature searches to identify post-training peer-reviewed publications. In late 2014, manual searches for publications by former R25 students identified 232 cancer-related articles published by 112 of 543 program graduates...
October 12, 2016: Journal of Cancer Education: the Official Journal of the American Association for Cancer Education
https://www.readbyqxmd.com/read/27665980/scanning-electron-microscopy-with-energy-dispersive-x-ray-spectrophotometry-analysis-of-reciprocating-and-continuous-rotary-nickel-titanium-instruments-following-root-canal-retreatment
#12
Elif Kalyoncuoğlu, Cangül Keskin, İsmail Uzun, Aydın S Bengü, Buğra Guler
This study aimed to evaluate superficial defects and the composition of Reciproc R25 and ProTaper Retreatment file systems (Dentsply Maillefer, Ballaigues, Switzerland) used for retreatment. A total of 100 maxillary incisor teeth were randomly divided into the following two groups: Reciproc R25 (n = 25) and ProTaper Retreatment instrument (n = 75) groups. The nickel-titanium (Ni-Ti) compositions of the files before and after use were analyzed using energy dispersive X-ray spectrophotometry (EDX). Chi-square, Mann-Whitney U, and Kruskal-Wallis tests were used to analyze the data...
2016: Journal of Oral Science
https://www.readbyqxmd.com/read/27651042/efficacy-of-cm-wire-m-wire-and-nickel-titanium-instruments-for-removing-filling%C3%A2-material-from-curved-root-canals-a%C3%A2-micro-computed-tomography-study
#13
Clarissa Teles Rodrigues, Marco Antonio Hungaro Duarte, Marcela Milanezi de Almeida, Flaviana Bombarda de Andrade, Norberti Bernardineli
INTRODUCTION: The aim of this ex vivo study was to evaluate the removal of filling material after using CM-wire, M-wire, and nickel-titanium instruments in both reciprocating and rotary motions in curved canals. METHODS: Thirty maxillary lateral incisors were divided into 9 groups according to retreatment procedures: Reciproc R25 followed by Mtwo 40/.04 and ProDesign Logic 50/.01 files; ProDesign R 25/.06 followed by ProDesign Logic 40/.05 and ProDesign Logic 50/...
November 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27520406/cyclic-fatigue-resistance-of-reciproc-waveone-and-waveone-gold-nickel-titanium-instruments
#14
Taha Özyürek
INTRODUCTION: The purpose of this study was to compare the cyclic fatigue resistance of Reciproc R25 (VDW, Munich, Germany), WaveOne Primary (Dentsply Maillefer, Ballaigues, Switzerland), and WaveOne Gold Primary files (Dentsply Maillefer). METHODS: Twenty Reciproc R25, 20 WaveOne Primary, and 20 WaveOne Gold Primary instruments were included in this study. The cyclic fatigue tests were performed using a cyclic fatigue testing device, which has an artificial stainless steel canal with a 60° angle of curvature and a 5-mm radius of curvature...
October 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27459660/factors-associated-with-adherence-to-adjuvant-endocrine-therapy-among-privately-insured-and-newly-diagnosed-breast-cancer-patients-a-quantile-regression-analysis
#15
Albert J Farias, Ryan N Hansen, Steven B Zeliadt, India J Ornelas, Christopher I Li, Beti Thompson
BACKGROUND: Adherence to adjuvant endocrine therapy (AET) for estrogen receptor-positive breast cancer remains suboptimal, which suggests that women are not getting the full benefit of the treatment to reduce breast cancer recurrence and mortality. The majority of studies on adherence to AET focus on identifying factors among those women at the highest levels of adherence and provide little insight on factors that influence medication use across the distribution of adherence. OBJECTIVE: To understand how factors influence adherence among women across low and high levels of adherence...
August 2016: Journal of Managed Care & Specialty Pharmacy
https://www.readbyqxmd.com/read/27447117/the-rod-cone-crossover-connectome-of-mammalian-bipolar-cells
#16
J Scott Lauritzen, Crystal L Sigulinsky, James R Anderson, Michael Kalloniatis, Noah T Nelson, Daniel P Emrich, Christopher Rapp, Nicholas McCarthy, Ethan Kerzner, Miriah Meyer, Bryan W Jones, Robert E Marc
The basis of cross-suppression between rod and cone channels has long been an enigma. Using rabbit retinal connectome RC1, we show that all cone bipolar cell (BC) classes inhibit rod BCs via amacrine cell (AC) motifs (C1-6); that all cone BC classes are themselves inhibited by AC motifs (R1-5, R25) driven by rod BCs. A sparse symmetric AC motif (CR) is presynaptic and postsynaptic to both rod and cone BCs. ON cone BCs of all classes drive inhibition of rod BCs via motif C1 wide-field GABAergic ACs (γACs) and motif C2 narrow field glycinergic ON ACs (GACs)...
July 22, 2016: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/27411656/cyclic-fatigue-resistance-of-different-continuous-rotation-and-reciprocating-endodontic-systems
#17
Fabio de Almeida-Gomes, Humberto Ramah Menezes de Matos, Rodrigo Ferreira Lopes Arrais Nunes, Ariel Moura Arrais, Claudio Ferreira-Maniglia, Marcelo de Morais Vitoriano, Eduardo Diogo Gurgel-Filho
OBJECTIVE: The objective of this study is to compare the cyclic fatigue resistance of nine types of endodontic instruments of nickel-titanium. MATERIALS AND METHODS: Five files of 25 mm of length of each group: Reciproc (RC) R25; WaveOne (WO) Primary; Unicone (UC) L25 25/0.06; K3XF 25/0.06; ProTaper Universal F2 (PTF2); ProTaper Next X2 (PTX2); Mtwo 25/0.06; BioRaCe 25/0.06; One Shape L25 25/0.06 were subjected to a cyclic fatigue resistance test on a mechanical apparatus...
May 2016: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/27400743/influence-of-apical-enlargement-and-complementary-canal-preparation-with-the-self-adjusting-file-on-endotoxin-reduction-in-retreatment-cases
#18
E J N L Silva, V M Ferreira, C C Silva, Herrera, G De-Deus, B P Gomes
AIM: To compare the effectiveness of large apical preparations and complementary canal preparation with the Self Adjusting File (SAF) in removing endotoxins from the root canal of teeth with apical periodontitis. METHODOLOGY: Ten single-rooted and single-canaled teeth with post-treatment apical periodontitis were selected. Endotoxin samples were taken after the removal of the root filling (S1), after chemomechanical preparation (CMP) using 2.5% NaOCl and an R25 file (S2), after CMP using 2...
July 12, 2016: International Endodontic Journal
https://www.readbyqxmd.com/read/27344032/laboratory-comparison-of-cyclic-fatigue-resistance-of-waveone-gold-reciproc-and-waveone-files-in-a-canal-with-a-double-curvature
#19
H S Topçuoğlu, S Düzgün, A Aktı, G Topçuoğlu
AIM: To compare the resistance to cyclic fatigue of WaveOne Gold (WOG), Reciproc, and WaveOne (WO) nickel-titanium files in an artificial root canal with a double (S-shaped) curvature. METHODOLOGY: A total of 120 new WOG primary, Reciproc R25, and WO primary files were tested in an artificial, stainless steel canal with an S-shape (diameter, 1.4 mm and length, 18 mm). Forty files from each system were rotated until fracture to calculate the number of cycles to failure (NCF)...
June 25, 2016: International Endodontic Journal
https://www.readbyqxmd.com/read/27294722/formation-of-mn-co-ni-o-nanoceramic-microspheres-using-in-situ-ink-jet-printing-sintering-process-effect-on-the-microstructure-and-electrical-properties
#20
Long Chen, Qinan Zhang, Jincheng Yao, Junhua Wang, Wenwen Kong, Chunping Jiang, Aimin Chang
Mn-Co-Ni-O nanoceramic microspheres with high density, uniformity, and size tunability are successfully fabricated using in situ ink-jet printing and two step sintering (TSS) techniques. The microspheres, synthesized by an effective and facile reverse microemulsion method, consist of uncalcined Mn-Co-Ni-O nanocrystallines that show a well formed single tetragonal spinel phase and an average particle size distribution of ≈20 nm. The sintering behavior, microstructure, and electrical properties of the Mn-Co-Ni-O nanoceramic microspheres are systematically investigated and characterized...
June 13, 2016: Small
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