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https://www.readbyqxmd.com/read/28344947/factors-associated-with-odontogenic-bacteraemia-in-orthodontic-patients
#1
O D Umeh, O O Sanu, I L Utomi, F O Nwaokorie
BACKGROUND: Various researches have investigated factors associated with the prevalence and intensity of bacteraemia following oral procedures including orthodontic procedures. AIM: The aim of this study was to determine the effect of age, gender, plaque and gingival indices on the occurrence of odontogenic bacteraemia following orthodontic treatment procedures. SETTING: Orthodontic Clinic, Lagos University Teaching Hospital (LUTH), Lagos, Nigeria...
April 2016: Journal of the West African College of Surgeons
https://www.readbyqxmd.com/read/28343925/influence-of-alveolar-bone-loss-and-cement-layer-thickness-on-the-biomechanical-behavior-of-endodontically-treated-maxillary-incisors-a-3-dimensional-finite-element-analysis
#2
Amanda Maria de Oliveira Dal Piva, João Paulo Mendes Tribst, Rodrigo Othávio de Assunção E Souza, Alexandre Luiz Souto Borges
INTRODUCTION: In order to understand the mechanical behavior of a weakened incisor, this study aimed to evaluate the stress distribution caused by different alveolar bone heights and cement layer thickness. METHODS: A finite element analysis was conducted for this investigation. An intact maxillary central incisor was initially modeled, and the bone of the models was modified in order to simulate 4 levels of bone height: BL0 (no bone loss), BL1 (1/3 bone loss), BL2 (1/2 bone loss), and BL3 (2/3 bone loss)...
March 23, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28343677/influence-of-adhesive-cementation-systems-on-the-bond-strength-of-relined-fiber-posts-to-root-dentin
#3
Raquel Viana Rodrigues, Camila Sobral Sampaio, Rafael Rocha Pacheco, Fernanda Miori Pascon, Regina Maria Puppin-Rontani, Marcelo Giannini
STATEMENT OF PROBLEM: Glass fiber post cementation procedures have undergone significant development. Relining the post with composite resin is a technique that aims to reduce resin cement thickness and consequently problems inherent to polymerization. Evidence is sparse regarding the efficacy of bonding procedures at increasing depths (from cervical to apical) using different adhesive cementation techniques. PURPOSE: The purpose of this in vitro study was to evaluate the push-out bond strength (PBS) of composite resin relined glass fiber posts cemented to bovine root dentin using different adhesive cementation protocols...
March 23, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28342696/measurement-of-change-on-medial-and-lateral-joint-gaps-by-navigation-system-in-multi-radius-ps-tka
#4
Yeesuk Kim, Jin Kyu Lee, Kyu-Sung Chung, Doo-Yeon Lee, Choong Hyeok Choi
BACKGROUND: The purpose of this study was to evaluate the joint gap kinematics in posterior-stabilized total knee arthroplasty (PS TKA). METHODS: Between January 2010 and April 2011, 44 consecutive patients (55 knees) who underwent primary PS TKA using the navigation system were assessed. There were 37 women and 7 men with a mean age at operation of 63 years (range; 58-73 years). After fixation of all components with cement and insertion of polyethylene trial insert, medial and lateral joint gap measurements were carried out without distraction force and separately using a navigation system on each flexion angles...
March 22, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28342695/in%C3%A2-vivo-serum-concentration-of-vancomycin-in-antibiotic-loaded-acrylic-cement-for-the-treatment-and-prevention-of-periprosthetic-hip-infection
#5
Kenichi Oe, Hirokazu Iida, Narumi Ueda, Tomohisa Nakamura, Naofumi Okamoto, Yusuke Ueda
BACKGROUND: Although antibiotic-loaded acrylic cement (ALAC) is used to prevent and treat periprosthetic hip infection, it is unknown how much antibiotic is deposited in the body in vivo, how high the serum concentration rises, or how long its effects last. The aim of this study was firstly to determine the amount of vancomycin (VCM) deposited as ALAC in the body, and secondly to assess the safety and drug elution profile of VCM in ALAC. METHODS: We administered VCM to prevent infection after total hip arthroplasty (THA) or to treat patients with methicillin-resistant Staphylococcus aureus...
March 22, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28342006/potential-synergistic-effects-of-a-mixture-of-mineral-trioxide-aggregate-mta-cement-and-bacillus-subtilis-in-dental-caries-treatment
#6
Shunya Oka
Bacillus subtilis is nonpathogenic in humans and produces a number of useful substances and, therefore, this bacterium is used in probiotic therapy. There have been trials of B. subtilis for patients with periodontitis, but not for patients with caries. Similarly, mineral trioxide aggregate (MTA) cement has been widely used for endodontic treatment, but there are few reports of its use for caries. Therefore, examinations were performed regarding the benefits of addition of B. subtilis to MTA cement for treatment of dental caries...
March 24, 2017: Odontology
https://www.readbyqxmd.com/read/28340907/pervious-concrete-reactive-barrier-for-removal-of-heavy-metals-from-acid-mine-drainage-column-study
#7
Ayanda N Shabalala, Stephen O Ekolu, Souleymane Diop, Fitsum Solomon
This paper presents a column study conducted to investigate the potential use of pervious concrete as a reactive barrier for treatment of water impacted by mine waste. The study was done using acid mine drainage (AMD) collected from a gold mine (WZ) and a coalfield (TDB). Pervious concrete mixtures consisting of Portland cement CEM I 52.5R with or without 30% fly ash (FA) were prepared at a water-cementitious ratio of 0.27 then used to make cubes which were employed in the reactor columns. It was found that the removal efficiency levels of Al, Fe, Mn, Co and Ni were 75%, 98%, 99%, 94% and 95% for WZ; 87%, 96%, 99%, 98% and 90% for TDB, respectively...
February 5, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28340756/simultaneous-quantification-of-iodine-and-high-valent-metals-via-icp-ms-under-acidic-conditions-in-complex-matrices
#8
Kristina Brix, Christina Hein, Jonas Michael Sander, Ralf Kautenburger
The determination of iodine as a main fission product (especially the isotopes I-129 and I-131) of stored HLW in a disposal beside its distribution as a natural ingredient of many different products like milk, food and seawater is a matter of particular interest. The simultaneous ICP-MS determination of iodine as iodide together with other elements (especially higher valent metal ions) relevant for HLW is analytically very problematic. A reliable ICP-MS quantification of iodide must be performed at neutral or alkaline conditions in contrast to the analysis of metal ions which are determined in acidic pH ranges...
May 15, 2017: Talanta
https://www.readbyqxmd.com/read/28339597/compositional-differences-in-multi-species-biofilms-formed-on-various-orthodontic-adhesives
#9
Jung-Sub An, Kyungsun Kim, Soha Cho, Bum-Soon Lim, Sug-Joon Ahn
Objectives: To investigate the aspects of multi-species biofilm formation on various orthodontic adhesives with different surface characteristics. Methods: Multi-species biofilms using 13 bacterial species were grown on the surfaces of composite, compomer, and resin-modified glass-ionomer cement (RMGI). The changes in Streptococcus mutans (Sm), Streptococcus sobrinus (Ss), Porphyromonas gingivalis (Pg), Aggregatibacter actinomycetemcomitans (Aa), and total bacteria were determined at day 1 (T1) and day 4 (T2) using real-time polymerase chain reaction...
January 25, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28339019/occupational-exposure-to-mount-etna-s-basaltic-dust-assessment-of-mutagenic-and-cytotoxic-effects
#10
Caterina Ledda, Salvatore Cocuzza, Monica Salerno, Paola Senia, Serena Matera, Venerando Rapisarda, Carla Loreto
Basalt and volcanic ash are natural constituents of the ground surrounding volcanic areas such as Mount Etna. The dust may be daily inhaled by the general population as well as by several types of workers, such as construction workers. In this experiment, we analyzed the potential mutagenic and cytotoxic effects of the materials used in construction industry, excavated from Mt. Etna. Ground basalt (A), volcanic ash (B), mixed basalt and cement (C) and cement (D) were studied with Ames test, for mutagenic assessment and with MMT assay for cytotoxic evaluation...
March 24, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28338064/acceleration-of-bone-regeneration-by-activating-wnt-%C3%AE-catenin-signalling-pathway-via-lithium-released-from-lithium-chloride-calcium-phosphate-cement-in-osteoporosis
#11
Li Li, Xiaozhong Peng, Yongbao Qin, Renchong Wang, Jingli Tang, Xu Cui, Ting Wang, Wenlong Liu, Haobo Pan, Bing Li
By virtue of its excellent bioactivity and osteoconductivity, calcium phosphate cement (CPC) has been applied extensively in bone engineering. Doping a trace element into CPC can change physical characteristics and enhance osteogenesis. The trace element lithium has been demonstrated to stimulate the proliferation and differentiation of osteoblasts. We investigated the fracture-healing effect of osteoporotic defects with lithium-doped calcium phosphate cement (Li/CPC) and the underlying mechanism. Li/CPC bodies immersed in simulated body fluid converted gradually to hydroxyapatite...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28337731/arthroplasty-registries-around-the-world-valuable-sources-of-hip-implant-revision-risk-data
#12
REVIEW
Richard E Hughes, Aditi Batra, Brian R Hallstrom
PURPOSE OF REVIEW: National and regional arthroplasty registries have proliferated since the Swedish Knee Arthroplasty Register was started in 1975. Registry reports typically present implant-specific estimates of revision risk and patient- and technique-related factors that can inform clinical decision-making about implants and techniques. However, annual registry reports are long and it is difficult for clinicians to extract comparable revision risk data. Since implants may appear in multiple registry reports, it is even more difficult to gather relevant data for clinical decision-making about implant selection...
March 23, 2017: Current Reviews in Musculoskeletal Medicine
https://www.readbyqxmd.com/read/28337624/geochemical-behavior-of-ultramafic-waste-rocks-with-carbon-sequestration-potential-a-case-study-of-the-dumont-nickel-project-amos-qu%C3%A3-bec
#13
El Hadji Babacar Kandji, Benoit Plante, Bruno Bussière, Georges Beaudoin, Pierre-Philippe Dupont
The geochemical behavior of ultramafic waste rocks and the effect of carbon sequestration by these waste rocks on the water drainage quality were investigated using laboratory-scale kinetic column tests on samples from the Dumont Nickel Project (RNC Minerals, QC, Canada). The test results demonstrated that atmospheric CO2 dissolution induced the weathering of serpentine and brucite within the ultramafic rocks, generating high concentrations of Mg and HCO3(-) with pH values ranging between 9 and 10 in the leachates that promote the precipitation of secondary Mg carbonates...
March 23, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28337003/shade-of-resin-based-luting-agents-and-final-color-of-porcelain-veneers
#14
(no author information available yet)
All that is required is three shades of luting cement.
March 24, 2017: British Dental Journal
https://www.readbyqxmd.com/read/28336976/the-hall-technique-10-years-on-questions-and-answers
#15
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
https://www.readbyqxmd.com/read/28336039/the-antibiotic-nail-in-the-treatment-of-long-bone-infection-technique-and-results
#16
REVIEW
Kenneth L Koury, John S Hwang, Michael Sirkin
Antibiotic cement nails provide a useful and relatively simple technique to treat intramedullary osteomyelitis of the long bones. These devices provide stability as well as local, targeted antibiotics, which are both critical aspects of osteomyelitis management. Additionally, the use of a threaded core is a critical component of successful cement nail assembly. With adherence to the simple principles outlined in this review, surgeons can expect reliably good results using these drug-delivery implants.
April 2017: Orthopedic Clinics of North America
https://www.readbyqxmd.com/read/28336032/evidence-appraisal-of-koh-bth-tan-jh-ramruttun-ak-wang-w-effect-of-storage-temperature-and-equilibration-time-on-polymethyl-methacrylate-pmma-bone-cement-polymerization-in-joint-replacement-surgery-j-orthop-surg-res-2015-10-1-178-doi-10-1186-s13018-015-0320
#17
https://www.readbyqxmd.com/read/28335683/redescription-of-pallisentis-brevitritospinus-indica-acanthocephala-quadrigyridae-from-channa-punctatus-bloch-schneider-channidae-in-aligarh-india-with-new-understandings-of-old-structures
#18
Omar M Amin, Richard Heckmann, Ahammed Shareef
Pallisentis indica Mital and Lal, 1976 was originally described from Channa gatchua Hamilton (Channidae) in Kali nadi River, Aligarh, India. It was later placed in the subgenus Brevitritospinus Amin, Heckmann, Ha, Luc, and Doanh, 2000. Our collection from the spotted snakehead Channa punctatus Bloch & Schneider in another locality of the same stream in Aligarh produced many specimens with variable traits revealing new structures that have never before been described in the Acanthocephala, especially relating to the ducted trunk spines...
March 23, 2017: Journal of Parasitology
https://www.readbyqxmd.com/read/28335369/effect-of-nano-sio%C3%A2-on-the-hydration-and-microstructure-of-portland-cement
#19
Liguo Wang, Dapeng Zheng, Shupeng Zhang, Hongzhi Cui, Dongxu Li
This paper systematically studied the modification of cement-based materials by nano-SiO₂ particles with an average diameter of about 20 nm. In order to obtain the effect of nano-SiO₂ particles on the mechanical properties, hydration, and pore structure of cement-based materials, adding 1%, 3%, and 5% content of nano-SiO₂ in cement paste, respectively. The results showed that the reaction of nano-SiO₂ particles with Ca(OH)₂ (crystal powder) started within 1 h, and formed C-S-H gel. The reaction speed was faster after aging for three days...
December 15, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335328/investigation-of-the-mechanical-properties-and-microstructure-of-graphene-nanoplatelet-cement-composite
#20
Baomin Wang, Ruishuang Jiang, Zhenlin Wu
In this work, graphene nanoplatelets (GNPs) were dispersed uniformly in aqueous solution using methylcellulose (MC) as a dispersing agent via ultrasonic processing. Homogenous GNP suspensions were incorporated into the cement matrix to investigate the effect of GNPs on the mechanical behavior of cement paste. The optimum concentration ratio of GNPs to MC was confirmed as 1:7 by ultraviolet visible spectroscopy (UV-Vis), and the optical microscope and transmission electron microscopy (TEM) images displayed remarkable dispersing performance...
November 4, 2016: Nanomaterials
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