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https://www.readbyqxmd.com/read/28342696/measurement-of-change-on-medial-and-lateral-joint-gaps-by-navigation-system-in-multi-radius-ps-tka
#1
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
#2
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/28339597/compositional-differences-in-multi-species-biofilms-formed-on-various-orthodontic-adhesives
#3
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
#4
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
#5
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
#6
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
#7
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
#8
(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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
https://www.readbyqxmd.com/read/28335312/correction-yan-x-et-al-study-on-utilization-of-carboxyl-group-decorated-carbon-nanotubes-and-carbonation-reaction-for-improving-strengths-and-microstructures-of-cement-paste-nanomaterials-2016-6-153
#15
Xiantong Yan, Hongzhi Cui, Qinghua Qin, Waiching Tang, Xiangming Zhou
The authors wish to make the following correction to this paper [1].[...].
October 13, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335281/study-on-utilization-of-carboxyl-group-decorated-carbon-nanotubes-and-carbonation-reaction-for-improving-strengths-and-microstructures-of-cement-paste
#16
Xiantong Yan, Hongzhi Cui, Qinghua Qin, Waiching Tang, Xiangming Zhou
Carbon nanotubes (CNTs) have excellent mechanical properties and can be used to reinforce cement-based materials. On the other hand, the reaction product of carbonation with hydroxides in hydrated cement paste can reduce the porosity of cement-based materials. In this study, a novel method to improve the strength of cement paste was developed through a synergy of carbon nanotubes decorated with carboxyl group and carbonation reactions. The experimental results showed that the carboxyl group (-COOH) of decorated carbon nanotubes and the surfactant can control the morphology of the calcium carbonate crystal of carbonation products in hydrated cement paste...
August 19, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28333042/minocycline-releasing-pmma-system-as-a-space-maintainer-for-staged-bone-reconstructions-in-vitro-antibacterial-cytocompatibility-and-anti-inflammatory-characterization
#17
Tiago Silva, Liliana Grenho, Joana Barros, José Silva, Rosana Pinto, Ana Matos, Bruno Colaço, Helena Fernandes, Ana Bettencourt, Pedro S Gomes
In the present work, it is aimed the development and biological characterization of a poly methyl methacrylate (PMMA)-based minocycline delivery system, to be used as a space maintainer within craniofacial staged regenerative interventions. Developed delivery systems were characterized regarding solid state characteristics and assayed in vitro for anti-bacterial and anti-inflammatory activity, and cytocompatibility with human bone cells. Drug release profile allowed for an initial burst release and a more sustained and controlled release over time, with minimum inhibitory concentrations for the assayed and relevant pathogenic bacteria (i...
March 23, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28332044/no-difference-between-cemented-and-cementless-total-knee-arthroplasty-in-young-patients-a-review-of-the-evidence
#18
REVIEW
Edoardo Franceschetti, Guglielmo Torre, Alessio Palumbo, Rocco Papalia, Jón Karlsson, Olufemi R Ayeni, Kristian Samuelsson, Francesco Franceschi
PURPOSE: The present piece of work provides improved knowledge about the evidence related to TKA in patients 60 years of age or younger, with special focus on fixation methods. Main concern of the review is to analyse the difference of survival rate and complications of cemented and cementless implants. METHODS: An electronic search was carried out between October and December 2015, through CINAHL, PubMed and the Cochrane Central Registry of Controlled Trials web databases...
March 22, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28330800/tourniquet-and-closed-suction-drains-in-total-knee-arthroplasty-no-beneficial-effects-on-bleeding-management-and-knee-function-at-a-higher-cost
#19
David Yin, JoséeDelisle, AndreeaBanica, Andrea Senay, Pierre Ranger, G Yves Laflamme, Jiang Jun, Julio Fernandes
BACKGROUND: Blood loss is a major concern in total knee arthroplasty (TKA) along with postoperative knee function. The present study explores the impact of tourniquet (T) and closed-suction drains (D) on these parameters in TKA. MATERIALS AND METHODS: A prospective study was conducted on 111 patients admitted for TKA. Subjects were divided into three groups: 36 in group T+D+, 42 in T-D+ and 33 in T-D- (where T+: prolonged tourniquet use, T-: cementation-only tourniquet, D+: closed-suction drain use, and D-: no drain)...
March 19, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28328229/characterization-of-the-bonds-developed-between-calcium-silicate-hydrate-and-polycarboxylate-based-superplasticizers-with-silyl-functionalities
#20
Carlos A Orozco, Byong-Wa Zen Chun, Guoqing Geng, Abdul-Hamid Emwas, Paulo J M Monteiro
Major developments in concrete technology have been achieved with the use of polycarboxylate-based superplasticizers (PCEs) to improve the concrete rheology without increasing the mix water content. Currently, it is possible to control the fluidity of the fresh concrete and obtain stronger and more durable structures. Therefore, there is a strong incentive to understand the interactions between PCEs and cement hydrates at the atomic scale to design new customized functional PCEs according to the ever-increasing requirements of the concrete industry...
March 22, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
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