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Christoph Hadler, Kirsten Wissel, Gudrun Brandes, Wibke Dempwolf, Günter Reuter, Thomas Lenarz, Henning Menzel
The polyimide Kapton® was coated photochemically with hydrophilic polymers to prevent undesirable cell growth on the polyimide surface. The polymer coatings were generated using photochemically reactive polymers synthesized by a simple and modular strategy. Suitable polymers or previously synthesized copolymer precursors were functionalized with photoactive arylazide groups by a polymer analogous amide coupling reaction with 4-azidobenzoic acid. A photoactive chitosan derivative (chitosan-Az) and photochemically reactive copolymers containing DMAA, DEAA or MTA as primary monomers were synthesized using this method...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
C Stukenborg-Colsman, L Claaßen, S Ettinger, D Yao, M Lerch, C Plaaß
Distal osteotomies, like the Chevron osteotomy, is indicated for mild to moderate hallux valgus deformities. Splayfoot, painful pseudoexostosis, and transfer metatasalgia are observed in the clinical examination. Radiographic examination should be done with weight bearing in two planes. Preoperatively the intermetatarsal (IM), hallux valgus, and distal metatarsal articular (DMAA) angles should be measured. The operative technique is based on soft tissue and bony correction. Modifications of the osteotomy allow a shortening, lengthening, or neutral correction of the first metatarsal...
April 12, 2017: Der Orthopäde
Young Hwan Park, Chan Dong Jeong, Gi Won Choi, Hak Jun Kim
BACKGROUND: Bipartite hallucal sesamoids are often found in patients with hallux valgus. However, it is unknown whether bipartite hallucal sesamoids affect the results of hallux valgus surgery or not. The purpose of the present study was to evaluate the outcomes of chevron osteotomy for hallux valgus with and without bipartite hallucal sesamoid. METHODS: A total of 152 patients (168 feet) treated with distal or proximal chevron osteotomy for hallux valgus constituted the study cohort...
April 1, 2017: Foot & Ankle International
Eduardo Pedrini Cruz, Felipe Victora Wagner, Carlo Henning, José Antônio Veiga Sanhudo, Fernando Pagnussato, Carlos Roberto Galia
The hallux valgus is a pathologic condition in the forefoot that often causes pain and functional limitations. Assessing all deformity components, such as the distal metatarsal articular angle (DMAA) is essential to hallux valgus treatment. Nevertheless, interobserver agreement of DMAA is poor on plain radiographs. The present study compared computed tomographic (CT) 3-dimensional (3D) reconstruction with plain radiographic measurements for measuring the DMAA. We included 43 consecutive patients (77 feet), diagnosed with hallux valgus at the orthopedic outpatient clinic at Hospital de Clínicas de Porto Alegre (Porto Alegre, Brazil) from April 2014 to June 2015 in our prospective study...
March 7, 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
Megan Maddocks, Shahed Nalla, Bernhard Zipfel
BACKGROUND: As hallux valgus (HV) progresses, the first metatarsal drifts medially and the subsequent lateral drift of the sesamoids results in intersesamoidal crista erosion. This study aimed to provide a novel method of assessing crista erosion and determine if there is a relationship between that erosion and an increase in the distal metatarsal articular angle (DMAA). METHODS: The DMAA and size of the intersesamoidal crista was measured on the first metatarsals of 120 adult modern human individuals...
January 17, 2017: Foot
Andrew Strydom, Nikiforos Pandelis Saragas, Paulo Norberto Faria Ferrao
BACKGROUND: The hallux valgus interphalangeus (HVI) deformity is described as rare, but improved outcomes in hallux valgus (HV) surgery is associated with its surgical correction via an Akin osteotomy. The hypothesis of this study is that HVI is common and makes a significant contribution to the total valgus deformity of the hallux (TVDH). METHODS: 285 pre-operative foot radiographs (193 with HV, 92 non-HV), utilising standardised radiographic and measurement techniques, were analysed retrospectively...
March 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
Antoine Lewin, Tye E Arbuckle, Mandy Fisher, Chun Lei Liang, Leonora Marro, Karelyn Davis, Nadia Abdelouahab, William D Fraser
BACKGROUND: The developing fetus and pregnant woman can be exposed to a variety of environmental chemicals that may adversely affect their health. Moreover, environmental exposure and risk disparities are associated with different social determinants, including socioeconomic status (SES) and demographic indicators. Our aim was to investigate whether and how maternal concentrations of a large panel of persistent and non-persistent environmental chemicals vary according to sociodemographic and lifestyle characteristics in a large pregnancy and birth cohort...
March 2017: International Journal of Hygiene and Environmental Health
Eusebio Crespo Romero, Alvaro Arcas Ordoño, Raquel Peñuela Candel, Silvia Gómez Gómez, Angel Arias Arias, Jaime Gálvez González, Ricardo Crespo Romero
BACKGROUND: Many factors are considered predictors of recurrence after hallux valgus (HV) surgery, including preoperative distal metatarsal articular angle (DMAA). The restoration of the bone and joint alignment would be more important than realigning the cartilaginous surface of the metatarsal head. Therefore, is DMAA correction essential for a good clinical and radiological results after HV surgery? This study aims to illustrate the results of percutaneous forefoot surgery (PFS) for correction of HV deformity without DMAA correction...
January 1, 2017: Foot & Ankle Specialist
Carlo Biz, Michele Fosser, Miki Dalmau-Pastor, Marco Corradin, Maria Grazia Rodà, Roberto Aldegheri, Pietro Ruggieri
BACKGROUND: Minimally invasive surgery (MIS) represents one of the most innovative surgical treatments of hallux valgus (HV). However, long-term outcomes still remain a matter of discussion within the orthopaedic community. The purpose of this longitudinal prospective study was to evaluate radiographic and functional outcomes in patients with mild-to-severe HV who underwent Reverdin-Isham and Akin percutaneous osteotomy, following exostosectomy and lateral release. METHODS: Eighty patients with mild-to-severe symptomatic HV were treated by MIS...
December 5, 2016: Journal of Orthopaedic Surgery and Research
Matthew Dunn
In June 2012 DMAA (1,3-dimethylamylamine), an ephedrine-like vasoconstricting substance which had been included in many popular sports supplements, became a scheduled substance in Australia, following bans in several other countries. The underlying rationale for this ban was that DMAA use is unsafe. This paper aimed to critically review the available evidence on the acute and/or long-term harms of DMAA. Using five research databases (PubMed, Embase, ProQuest Health and Medical Complete, and Web of Science) and the key terms 'methylhexaneamine', 'DMAA', 'dimethylamylamine', '1,3-dimethylpentylamine' and '2-amino-4-methylhexane', 842 articles were identified once duplicates removed...
February 2017: International Journal on Drug Policy
Paulo Carvalho, G Viana, M Flora, P Emanuel, P Diniz
INTRODUCTION: Currently there is no consensus regarding the use of bilateral simultaneous percutaneous surgery for Hallux valgus treatment. Although the technique described in M. Prado's book, recommends operating only one foot at a time there are no published studies confirming it. The aim of this study was to evaluate whether there is a difference between the results of patients that have been percutaneously operated on one foot and those operated on both feet at the same surgical time for mild to moderate Hallux valgus correction...
December 2016: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
Takahiro Iwai, Koichi Chiba, Tomohiro Narukawa
The concentrations of arsenic (As) and cadmium (Cd) in the tobacco leaves, ash and smoke of 10 kinds of cigarettes collected from different countries worldwide were determined by ICP-MS after microwave-assisted digestion. Total As and Cd concentrations in the tobacco leaves ranged from 0.20 to 0.63 and 1.8 to 9.9 mg kg(-1), respectively. By the speciation analysis of As in tobacco leaves and ash by HPLC-ICP-MS following acid extraction, arsenite [As(III)] and arsenate [As(V)] were determined and trace amounts of monomethylarsonic acid (MMAA), dimethylarsinic acid (DMAA), trimethylarsine oxide (TMAO), tetramethylarsonium (TeMA) and some unidentified As species were also found...
2016: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
Jin Su Kim, Hun Ki Cho, Ki Won Young, Sang Young Lee, Ji Soo Kim, Kyoungtae Lee
BACKGROUND: Scarf osteotomy has been used in hallux valgus surgery due to its large fixation surface for screws and low postoperative complications. However, screws may cause skin irritation from their head, which may require an additional surgical procedure to remove. METHODS: This study included 115 patients (106 females and 9 males, 115 feet) who underwent hallux valgus correction with a scarf osteotomy using bioabsorbable screws between September 2010 and September 2012...
November 2016: Foot & Ankle International
Rodrigo Díaz Fernández
BACKGROUND: Percutaneous surgery to correct deformities of the forefoot presents the advantages of using a minimal incision, which involves less soft tissue damage and less risk of wound complications. For severe deformities, percutaneous techniques have not been proven as effective. We propose a technique for the treatment of severe hallux valgus. METHODS: In a sample of 52 feet operated on 48 patients, we performed a double percutaneous osteotomy (closure proximal osteotomy and a distal Akin) or triple when a Reverdin-Isham osteotomy was added...
February 2017: Foot & Ankle International
Filip Ottosson, Ulrika Ericson, Peter Almgren, Jeanette Nilsson, Martin Magnusson, Céline Fernandez, Olle Melander
High fasting plasma concentrations of isoleucine, phenylalanine, and tyrosine have been associated with increased risk of hyperglycaemia and incidence of type 2 diabetes. Whether these associations are diet or metabolism driven is unknown. We examined how the dietary protein source affects the postprandial circulating profile of these three diabetes associated amino acids (DMAAs) and tested whether the postprandial DMAA profiles are associated with fasting glycaemia. We used a crossover design with twenty-one healthy individuals and four different isocaloric test meals, containing proteins from different dietary sources (dairy, fish, meat, and plants)...
2016: Journal of Amino Acids
A J Metrano, N C Abascal, B Q Mercado, E K Paulson, S J Miller
We describe herein a crystallographic and NMR study of the secondary structural attributes of a β-turn-containing tetra-peptide, Boc-Dmaa-D-Pro-Acpc-Leu-NMe2, which was recently reported as a highly effective catalyst in the atroposelective bromination of 3-arylquinazolin-4(3H)-ones. Inquiries pertaining to the functional consequences of residue substitutions led to the discovery of a more selective catalyst, Boc-Dmaa-D-Pro-Acpc-Leu-OMe, the structure of which was also explored. This new lead catalyst was found to exhibit a type I'β-turn secondary structure both in the solid state and in solution, a structure that was shown to be an accessible conformation of the previously reported catalyst, as well...
April 4, 2016: Chemical Communications: Chem Comm
Satoru Nakagawa, Jun-Ichi Fukushi, Takeshi Nakagawa, Hideki Mizu-Uchi, Yukihide Iwamoto
BACKGROUND: Metatarsalgia is frequently associated with hallux valgus. The aim of this study was to evaluate how the relative length and position of the first metatarsal head influenced metatarsalgia and plantar callosities beneath the lesser metatarsal heads. METHODS: A retrospective analysis of the clinical data and radiographs of 102 cases was performed at a mean follow-up of 16 months after biplane interlocking osteotomies. Clinical evaluation was made using the Japanese Society for Surgery of the Foot (JSSF) hallux scale...
June 2016: Foot & Ankle International
Hideaki Tokuyama, Eri Kitamura, Yoshimi Seida
A polymer-coated quartz crystal microbalance (QCM) sensor has been developed for the detection of Au(III) ions in a HCl aqueous solution. Poly(N,N-dimethylacrylamide) (poly(DMAA)) gel was used as a sensing material. The poly(DMAA) gel adsorbs Au(III) ions in the HCl aqueous solution, whereas it is inactive toward most other metal ions. The equilibrium adsorption of Au(III) ions onto the poly(DMAA) gel can be expressed by the Henry-type isotherm. The oscillation behavior of the poly(DMAA)-coated QCM sensor was investigated, and linear relationships between the resonance frequency shift and the concentration of Au(III) ions were obtained for concentrations of less than 0...
January 1, 2016: Talanta
Cesare Faldini, Matteo Nanni, Francesco Traina, Daniele Fabbri, Raffaele Borghi, Sandro Giannini
PURPOSE: During growth, hallux valgus could present associated with flatfoot. Considering the current disagreement about correction of hallux valgus during growth and the lack of reports about simultaneous correction of hallux valgus associated with flexible flatfoot, we present simultaneous treatment of both deformities during growth combining subtalar arthroeresis and SERI first metatarsal osteotomy, reporting results at an average five-year follow-up. METHODS: Thirty-two children (64 feet, age range 8-12 years) affected by hallux valgus associated with flexible flatfoot underwent surgical treatment combining SERI first metatarsal osteotomy and subtalar arthroereisis with bioabsorbable endorthotic implant...
April 2016: International Orthopaedics
Josselin Gorny, Ludovic Lesven, Gabriel Billon, David Dumoulin, Catherine Noiriel, Caroline Pirovano, Benoît Madé
A new laboratory-made Zn-ferrite (ZnFe2O4) binding gel is fully tested using Diffusive Gradient in Thin films (DGT) probes to measure total As [including inorganic As(III) and As(V), as well as MonoMethyl Arsenic Acid (MMAA(V)) and DiMethyl Arsenic Acid (DMAA(V))] in river waters and sediment pore waters. The synthesis of the binding gel is easy, cheap and its insertion into the acrylamide gel is not problematic. An important series of triplicate tests have been carried out to validate the use of the Zn-ferrite binding gel in routine for several environmental matrixes studies, in order to test: (i) the effect of pH on the accumulation efficiency of inorganic As species; (ii) the reproducibility of the results; (iii) the accumulation efficiency of As species; (iv) the effects of the ionic strength and possible competitive anions; and (v) the uptake and the elution efficiency of As species after accumulation in the binding gel...
November 1, 2015: Talanta
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