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https://www.readbyqxmd.com/read/29242816/dimensional-stability-of-two-impression-materials-after-a-6-month-storage-period
#1
Francisco Martins, Patrícia Branco, José Reis, Ignacio Barbero Navarro, Paulo Maurício
Objective: Oral rehabilitation success is enhanced by an accurate and reproducible final impression. The purpose of this study is to evaluate the dimensional changes of a polyether and addition silicone subjected to disinfection and/or sterilization after a long storage period. Material and methods: Ninety samples were obtained from polyether ImpregumTM PentaTM (3M ESPETM, Seefeld, Germany) and 90 of addition silicone ImprintTM 4 PentaTM Putty (3M ESPETM, Seefeld, Germany) according to ISO 4823:2000. The samples of each material were split to form three groups with 30 samples each: a control group, a hypochlorite group (disinfection) and an autoclave group (sterilization)...
2017: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/29240896/dechorionation-and-permeabilization-of-podisus-nigrispinus-heteroptera-pentatomidae-eggs-limiting-factors-for-cryopreservation
#2
Ítala Tainy Barreto Francisco Dos Santos, Júlio César Melo Poderoso, Edson José Santana Dos Santos, Genésio Tâmara Ribeiro, Jamile Fernanda Silva Cossolin, José Eduardo Serrão
Cryopreservation protocols have been developed for eggs of Diptera, Lepidoptera, and Hymenoptera; however, for Heteroptera, such as Podisus nigrispinus Dallas, 1851 (Pentatomidae), no procedures have been described yet. The objective of this study was to evaluate the processes of dechorionation and permeabilization on the viability of eggs of P. nigrispinus with different embryonic ages. In the laboratory, embryos of 24, 48, 72, and 96 h of age were submitted to sodium hydroxide, sodium hypochlorite, isopropyl, and hexane solutions for dechorionation and permeabilization...
December 12, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29237286/redox-sensing-under-hypochlorite-stress-and-infection-conditions-by-the-rrf2-family-repressor-hypr-in-staphylococcus-aureus
#3
Vu Van Loi, Tobias Busche, Jörg Bernhardt, Karsten Tedin, Jan Wollenhaupt, Nguyen Thi Thu Huyen, Chris Weise, Jörn Kalinowski, Markus Wahl, Marcus Fulde, Haike Antelmann
AIMS: Staphylococcus aureus is a major human pathogen and has to cope with reactive oxygen and chlorine species (ROS, RCS) during infections, which requires efficient protection mechanisms to avoid destruction. Here, we have investigated the changes in the RNA-seq transcriptome by the strong oxidant NaOCl in S. aureus USA300 to identify novel redox-sensing mechanisms that provide protection under infection conditions. RESULTS: NaOCl stress caused an oxidative stress response in S...
December 14, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/29232874/alkaline-material-effects-on-roots-of-teeth
#4
REVIEW
Sowmya Shetty, Sam L Kahler, Bill Kahler
The aim of this review was to identify and analyse all studies related to the effects of alkaline materials used in dentistry on roots of teeth. The first part of the review focused on mechanical property alterations of root dentine due to sodium hypochlorite (SH) used as an irrigant solution based on MeSH (Medical Subject Heading) terms from a previous study by Pascon et al in 2009. The second part reviewed literature on calcium hydroxide (CH), mineral trioxide aggregate (MTA) and other alkaline materials used as root canal dressings or filling materials...
December 10, 2017: Materials
https://www.readbyqxmd.com/read/29229460/effect-of-low-surface-tension-edta-solutions-on-the-bond-strength-of-resin-based-sealer-to-young-and-old-root-canal-dentin
#5
Cigdem Güzel, Emel Uzunoglu, Hatice Dogan Buzoglu
INTRODUCTION: The purpose of this study was to evaluate the effect of low-surface tension EDTA solutions on the push-out bond strength of resin-based sealer to young and old root canal dentin. METHODS: Root canals from 64 (n = 32 age <30 years old and n = 32 >60 years old) extracted, decoronized, single-rooted human teeth were prepared with ProTaper rotary instruments (Dentsply Maillefer, Ballaigues, Switzerland) up to size F4 using 3 mL 2.5% sodium hypochlorite (NaOCl) between each file...
December 8, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29229459/regenerative-endodontic-procedures-among-endodontists-a-web-based-survey
#6
Jonathan Y Lee, Daniel D Kersten, Pete Mines, Thomas A Beltran
INTRODUCTION: The protocols that endodontists implement for regenerative endodontic procedures (REPs) are unknown. The aim of this study was to examine current REP protocols among practicing endodontists in the United States. METHODS: A Web-based survey was sent to 4060 active members of the American Association of Endodontists (AAE). A total of 850 participants completed the survey, representing a 20.9% response rate. RESULTS: Responses indicated 60% reported having performed REPs; most performed 1 to 3 per year...
December 8, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29229458/the-effects-of-irrigants-on-the-survival-of-human-stem-cells-of-the-apical-papilla-including-endocyn
#7
Mark B Scott, Gregory S Zilinski, Timothy C Kirkpatrick, Van T Himel, Kent A Sabey, Thomas E Lallier
INTRODUCTION: Endocyn, a pH-neutral solution of hypochlorous acid and hypochlorite has been developed for use as an endodontic irrigant. The purpose of this study was to evaluate the effect of Endocyn on human periodontal ligament (PDL) fibroblasts, rat osteosarcoma cells (UMR-106), and stem cells of the apical papilla (SCAP) compared with other commonly used endodontic irrigants. METHODS: To determine cytotoxicity, cells were exposed to various concentrations of Endocyn, 6% sodium hypochlorite (NaOCl), 17% EDTA, and 2% chlorhexidine for 10 minutes, 1 hour, or 24 hours...
December 8, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29227906/to-disinfect-or-not-to-disinfect-in-postharvest-research-on-the-fungal-decay-of-apple
#8
Matthias Naets, Mattias van Dael, Els Vanstreels, Dirk Daelemans, Pieter Verboven, Bart Nicolaï, Wannes Keulemans, Annemie Geeraerd
Postharvest losses of fruit and vegetables can reach up to 30%, the main cause being microbial decay. For apple fruit, mostly fungal pathogens, such as Penicillium expansum, Colletotrichum spp., Neofabraea spp. and Botrytis cinerea, are important. As such losses are unsustainable in many ways, it is necessary that research is conducted to prevent them. Generally, for plants and fruit grown under non-sterile field conditions, disinfection is carried out prior to the start of a phytopathological experiment. The motivation for this practice is the removal of background contamination so that it will not affect the experimental outcome and its interpretation...
December 6, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29226295/-bleaching-glycerol-in-a-microfluidic-fuel-cell-to-produce-high-power-density-at-minimal-cost
#9
Cauê A Martins, Omar A Ibrahim, Pei Pei, Erik Kjeang
Glycerol/bleach flow-through microfluidic fuel cells are presented. Carbon paper-modified Pt/C nanoparticles were used as the anode and cathode. Glycerol oxidation in alkaline medium was tested against hypochlorite reduction in alkaline and acidic media. The mixed media system displayed a power density of 315 mW cm-2 and an open circuit voltage of 1.9-2.0 V.
December 11, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29226135/a-novel-cyclophilin-b-gene-in-the-red-tide-dinoflagellate-cochlodinium-polykrikoides-molecular-characterizations-and-transcriptional-responses-to-environmental-stresses
#10
Sofia Abassi, Hui Wang, Bum Soo Park, Jong-Woo Park, Jang-Seu Ki
The marine dinoflagellate Cochlodinium polykrikoides is one of the most common ichthyotoxic species that causes harmful algal blooms (HABs), which leads to ecological damage and huge economic loss in aquaculture industries. Cyclophilins (CYPs) belong to the immunophilin superfamily, and they may play a role in the survival mechanisms of the dinoflagellate in stress environments. In the present study, we identified a novel cyclophilin gene from C. polykrikoides and examined physiological and gene transcriptional responses to biocides copper sulphate (CuSO4) and sodium hypochlorite (NaOCl)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29225957/limited-sterile-processing-capabilities-for-safe-surgery-in-low-income-and-middle-income-countries-experience-in-the-republic-of-congo-madagascar-and-benin
#11
REVIEW
Olive Fast, Christina Fast, Dan Fast, Suzanne Veltjens, Zouliha Salami, Michelle C White
It is highly difficult to perform safe surgery without sterile instruments, yet the capacity to adequately clean, disinfect and sterilise surgical instruments in low-income and middle-income countries is largely unknown. Sterile Processing Education Charitable Trust developed an assessment tool and, in partnership with Mercy Ships, evaluated the sterile processing capacity in 59 facilities in Madagascar, Benin and the Republic of Congo. This data-driven analysis paper illustrates how lack of sterile processing capacity acts as a barrier to safe surgical care...
2017: BMJ Global Health
https://www.readbyqxmd.com/read/29225645/the-effects-of-different-ionic-liquid-coatings-and-the-length-of-alkyl-chain-on-antimicrobial-and-cytotoxic-properties-of-silver-nanoparticles
#12
Abbas Abbaszadegan, Ahmad Gholami, Sara Abbaszadegan, Zeynab Sadat Aleyasin, Yasamin Ghahramani, Samira Dorostkar, Bahram Hemmateenejad, Younes Ghasemi, Hashem Sharghi
Introduction: The antibacterial efficacy and toxicity of silver nanoparticles (AgNPs) depends on their physicochemical properties including size, shape, surface charge and surface coatings. The Objectives of this study were: i) To synthesize and characterize positively charged AgNPs coated by different ionic-liquids with different alkyl chain lengths, ii) To evaluate the antimicrobial activity of these nanoparticles against Enterococcus faecalis compared to sodium hypochlorite (NaOCl) and chlorhexidine (CHX), iii) To compare the cytocompatibility of these solutions against L929 mouse fibroblasts...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/29225638/the-probable-effect-of-irrigation-solution-and-time-on-bond-strength-to-coronal-dentin-an-in-vitro-evaluation
#13
Fatemeh Mokhtari, Ehsan Anvar, Mostafa Mirshahpanah, Hamidreza Hemati, Alireza Danesh Kazemi
Introduction: The aim of this study was to evaluate the effect of root canal irrigants on the microtensile bond strength of 2-step self-etch adhesive to dentin. Methods and Materials: n this study 36 sound extracted human third molars were used. After grinding 3 mm of occlusal surface, teeth were randomly divided into 6 groups based on irrigation material naming normal saline, 5.25% sodium hypochlorite (NaOCl) and 2% chlorhexidine (CHX) and also irrigation time (5 or 30 min)...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/29217950/agreement-between-direct-fluorescent-microscopy-and-ziehl-neelsen-concentration-techniques-in-detection-of-pulmonary-tuberculosis-in-northwest-ethiopia
#14
Meseret Workineh, Mandie Maru, Ibrahim Seman, Ziyadu Bezu, Markos Negash, Mulugeta Melku, Addisu Gize, Agumas Shibabaw
Background: The sensitivity of smear microscopy for diagnosis of tuberculosis might be improved through treatment of sputum with sodium hypochlorite and application of fluorescent microscopy. This study aimed to determine the agreement between direct Fluorescent Microscopy and Ziehl-Neelsen concentration technique by their ability of detecting acid fast bacilli in resource poor settings. Methods: A cross sectional study was conducted at Gondar University Referral Hospital, Northwest Ethiopia...
September 2017: Ethiopian Journal of Health Sciences
https://www.readbyqxmd.com/read/29213262/the-oxidative-stress-agent-hypochlorite-stimulates-c-di-gmp-synthesis-and-biofilm-formation-in-pseudomonas-aeruginosa
#15
Nikola Strempel, Michael Nusser, Anke Neidig, Gerald Brenner-Weiss, Joerg Overhage
The opportunistic human pathogen Pseudomonas aeruginosa is able to survive under a variety of often harmful environmental conditions due to a multitude of intrinsic and adaptive resistance mechanisms, including biofilm formation as one important survival strategy. Here, we investigated the adaptation of P. aeruginosa PAO1 to hypochlorite (HClO), a phagocyte-derived host defense compound and frequently used disinfectant. In static biofilm assays, we observed a significant enhancement in initial cell attachment in the presence of sublethal HClO concentrations...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29208796/comparative-evaluation-of-tensile-strength-in-die-stone-incorporated-with-sodium-and-calcium-hypochlorite-as-disinfectants-an-in-vitro-study
#16
N R Pramodh, C N Vijay Kumar, M R Pradeep, Ravi Naik, C S Mahesh, Manju R Kumari
AIM: The aim of this study was to evaluate the tensile strength of die stone incorporated with sodium and calcium hypochlorite as disinfectants. MATERIALS AND METHODS: Two commercially available type IV die stone (Kalrock: Kalabhai Karson Pvt., Ltd and Pearlstone: Asian Chemicals) and two commercially available disinfectant solutions (sodium hypochlorite and calcium hypochlorite: Beachem Laboratory Chemical Private Limited, Chennai and Leo Chem Private Limited, Bengaluru) were used in this study, and the tensile strength was measured using Lloyd's Universal Testing Machine...
December 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29208399/association-between-extracellular-material-and-biofilm-formation-in-response-to-sodium-hypochlorite-by-clinical-isolates-of-enterococcus-faecalis
#17
Austin Yoo, Giampiero Rossi-Fedele, Stephen P Kidd, Anthony H Rogers, Peter S Zilm
INTRODUCTION: Extracellular material (ECM) surrounding Enterococcus faecalis may play a role in increasing resistance to environmental stresses. Our aim was to determine ECM levels in response to subminimal inhibitory concentrations of sodium hypochlorite (sub-MIC/NaOCl) or anaerobic growth and determine the impact on biofilm development. METHODS: From 37 E. faecalis clinical strains, 19 were selected according to their biofilm-producing ability by using a crystal violet biofilm assay: 10 strong, 4 intermediate, and 5 non-biofilm producers...
December 2, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29208213/evaluation-of-ex-vivo-restoration-of-carious-equine-maxillary-cheek-teeth-infundibulae-following-debridement-with-dental-drills-and-hedstrom-files
#18
A Horbal, R J M Reardon, T Liuti, P M Dixon
An ex-vivo study was performed on vertically mounted equine maxillary cheek teeth that had caries of 30 infundibulae, using high and low speed contra-angle dental drills and Hedstrom files to debride infundibular food debris and carious dental tissues. This technique effectively debrided 27/30 infundibulae with a mean depth of 19mm (range 9.4-34.3mm) as assessed by computed tomographic (CT) imaging. The debrided infundibulae were treated with sodium hypochlorite, EDTA and a bonding agent, and then then filled in layers with endodontic restoration materials...
December 2017: Veterinary Journal
https://www.readbyqxmd.com/read/29207839/evaluation-of-effect-of-irrigants-with-or-without-surfactant-on-root-canal-transportation-by-cone-beam-computed-tomography-an-in-vitro-study
#19
Siddiq Ahmed, Prabu Mahin Syed Ismail, M Chandra Sekhar, Sampathi Naga Lakshmi Reddy, Moosani Gopi Krishna, Upendra Natha Reddy, Kalla Nikhita, P Sai Harish
Introduction: Maintenance of original canal anatomy with proper disinfection is our primary goal to achieve during root canal instrumentation. Surfactants are added to irrigating solution to promote deeper penetration into dentinal tubules. Aim: The aim of this study was to evaluate the influence of addition of surfactants to Sodium Hypochlorite (NaOCl) and Ethylenediaminetetraacetic Acid (EDTA) on transportation of root canal. Materials and Methods: Fifty human mandibular molars with mesial root curvatures of 10° - 40° were selected and embedded in silicone impression material to simulate mandibular arch form to facilitate imaging process and maintain reproducibility of images...
September 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/29206139/alkaline-materials-and-regenerative-endodontics-a-review
#20
REVIEW
Bill Kahler, Nadia Chugal, Louis M Lin
Periapical health is the primary goal of endodontic treatment in mature and immature teeth. In addition, the goals of treatment of immature teeth with arrested root development include root growth to length and maturation of the apex, as well as thickening of the canal wall. These goals are valid for immature teeth that have been subjected to trauma and dental caries or that are the result of developmental anomalies that expose the tooth to the risk of pulp necrosis and consequently result in the cessation of root maturation...
December 5, 2017: Materials
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