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https://www.readbyqxmd.com/read/28264339/two-new-species-of-i-melanorivulus-i-cyprinodontiformes-cynolebiidae-from-rio-verde-drainage-upper-rio-paran%C3%A3-basin-brazil
#1
Matheus Vieira Volcan, Bruno Klotzel, Luis Esteban Krause Lanés
Two new species of the genus Melanorivulus are herein described from the middle Rio Verde drainage, upper Rio Paraná basin, Mato Grosso do Sul, Brazil. Both new species are members of the Melanorivulus pictus clade, diagnosed by having ventral process of angulo-articular vestigial and flanks intense greenish blue or greenish golden to purplish blue above anal fin base in males. Melanorivulus nigropunctatus, new species, from wetlands of a small drainage tributary of right side of the Rio Verde, differs from all other congeners by possessing black dots over the head and body in both sexes and pectoral fin orange with a dark grey margin in males...
February 21, 2017: Zootaxa
https://www.readbyqxmd.com/read/28258948/distal-oblique-metatarsal-osteotomy-for-hallux-valgus-deformity-a-clinical-analysis
#2
Olcay Guler, Barıs Yilmaz, Serhat Mutlu, Mehmet Halis Cerci, Nurettin Heybeli
We compared the outcomes of the distal oblique metatarsal (DOM) osteotomy, which is parallel to the articulation surface of the proximal phalanx, with those of the Chevron osteotomy and evaluated whether displacement and shortening of the first metatarsal have any effect on the incidence of metatarsalgia and patient satisfaction. Patients treated with the DOM osteotomy (n = 30) or distal Chevron osteotomy (n = 31) were evaluated retrospectively. The Chevron and DOM osteotomies both provided significant improvement in the first intermetatarsal angle (p < ...
February 28, 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28237566/preliminary-results-and-learning-curve-of-the-minimally-invasive-chevron-akin-operation-for-hallux-valgus
#3
Charlie R J Jowett, Harvinder S Bedi
Minimally invasive surgery is increasing in popularity. It is relevant in hallux valgus surgery owing to the potential for reduced disruption of the soft tissues and improved wound healing. We present our results and assess the learning curve of the minimally invasive Chevron Akin operation for hallux valgus. A total of 120 consecutive feet underwent minimally invasive Chevron Akin for symptomatic hallux valgus, of which 14 were excluded. They were followed up for a mean of 25 (range 18 to 38) months. The patients were clinically assessed using the American Orthopaedic Foot and Ankle Society score...
February 22, 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28159041/suture-fixation-of-an-akin-osteotomy-a-cost-effective-and-clinically-reliable-technique
#4
T Sinnett, Y Fang, E Nattfogel, A O'Gorman, C Charalambides
BACKGROUND: The Akin osteotomy is commonly performed as an adjunct to osteotomies of the first metatarsal for the correction of hallux valgus such as the scarf or chevron osteotomies. The Akin osteotomy is indicated for the correction of a hallux valgus interphalangeus and can be used supplementary in any first metatarsal osteotomy for a hallux valgus. Various techniques have been described for fixation of the osteotomy. Most commonly the osteotomy is held and fixed with metalwork consisting of either a staple [2,3], a screw [4,5] or wiring [6,7]...
March 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28103730/surgical-treatment-of-moderate-hallux-valgus
#5
Maki Grle, Goran Vrgoc, Ivan Bohacek, Vladimir Hohnjec, Marko Martinac, Iva Brkic, Lovro Stefan, Zdravko Jotanovic
PURPOSE: The purpose of the study was to determine whether lateral soft-tissue release (LSTR) has a beneficial or detrimental effect on the outcome of distal Chevron first metatarsal osteotomy (DCMO) in the treatment of moderate hallux valgus (HV). METHODS: We compared the effect of different surgical treatments in 2 groups of patients: group I (23 patients, 25 feet, average age of 55 [from 43 to 77] years) was subjected to DCMO only, whereas group II (18 patients, 23 feet, average age of 59 [from 52 to 70] years]) was subjected to DCMO with LSTR...
January 1, 2017: Foot & Ankle Specialist
https://www.readbyqxmd.com/read/28039639/a-novel-procedure-for-introducing-large-sheet-type-surgical-material-with-a-self-expanding-origami-structure-using-a-slim-trocar-chevron-pleats-procedure
#6
Yuen Nakase, Kei Nakamura, Akira Sougawa, Tomoyuki Nagata, Satoshi Mochizuki, Shouzo Kitai, Seishirou Inaba
BACKGROUND: Large sheet-type surgical materials (e.g., absorbable hemostat, adhesion barrier membranes, and flat surgical mesh) are difficult to introduce into a corporeal cavity using a 5-mm trocar; however, laparoscopic surgeries that use mainly 5-mm trocars are increasing. Furthermore, it is necessary not only to introduce but also to secure the applied surgical material and expand it from the original surgical site. To address these challenges, we developed a novel procedure for introducing such surgical materials into a corporeal cavity using a 5-mm trocar and a self-expanding origami structure, called the "chevron pleats procedure (CPP)"...
December 30, 2016: Surgical Endoscopy
https://www.readbyqxmd.com/read/28005292/early-results-using-a-biodegradable-magnesium-screw-for-modified-chevron-osteotomies
#7
Christian Plaass, Sarah Ettinger, Lena Sonnow, Soeren Koenneker, Yvonne Noll, Andreas Weizbauer, Janin Reifenrath, Leif Claassen, Kiriakos Daniilidis, Christina Stukenborg-Colsman, Henning Windhagen
This is the first larger study analyzing the use of magnesium-based screws for fixation of modified Chevron osteotomies in hallux valgus surgery. Forty-four patients (45 feet) were included in this prospective study. A modified Chevron osteotomy was performed on every patient and a magnesium screw used for fixation. The mean clinical follow up was 21.4 weeks. The mean age of the patients was 45.5 years. Forty patients could be provided with the implant, in four patients the surgeon decided to change to a standard metallic implant...
December 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/27936761/solution-synthesized-chevron-graphene-nanoribbons-exfoliated-onto-h-si-100
#8
Adrian Radocea, Tao Sun, Timothy H Vo, Alexander Sinitskii, Narayana R Aluru, Joseph W Lyding
There has been tremendous progress in designing and synthesizing graphene nanoribbons (GNRs). The ability to control the width, edge structure, and dopant level with atomic precision has created a large class of accessible electronic landscapes for use in logic applications. One of the major limitations preventing the realization of GNR devices is the difficulty of transferring GNRs onto nonmetallic substrates. In this work, we developed a new approach for clean deposition of solution-synthesized atomically precise chevron GNRs onto H:Si(100) under ultrahigh vacuum...
December 12, 2016: Nano Letters
https://www.readbyqxmd.com/read/27933763/interfacial-self-assembly-of-atomically-precise-graphene-nanoribbons-into-uniform-thin-films-for-electronics-applications
#9
Mikhail Shekhirev, Timothy H Vo, Mohammad Mehdi Pour, Alexey Lipatov, Siddhanth Munukutla, Joseph W Lyding, Alexander Sinitskii
Because of their intriguing electronic and optical properties, atomically precise graphene nanoribbons (GNRs) are considered to be promising materials for electronics and photovoltaics. However, significant aggregation and low solubility of GNRs in conventional solvents result in their poor processability for materials characterization and device studies. In this paper, we demonstrate a new fabrication approach for large-scale uniform thin films of nonfunctionalized atomically precise chevron-type GNRs. The method is based on (1) the exceptional solubility of graphitic materials in chlorosulfonic acid and (2) the original interfacial self-assembly approach by which uniform films that are single-GNR (∼2 nm) thick can be routinely prepared...
December 23, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27888787/outcomes-in-chevron-osteotomy-for-hallux-valgus-in-a-large-cohort
#10
Bart van Groningen, M C Marieke van der Steen, Max Reijman, Janneke Bos, Johannes G E Hendriks
Clinical and radiological related outcomes have been reported for Chevron osteotomy as correction for mild to moderate hallux valgus, but only for relatively small patient series. Moreover, evaluation of the patient's point of view has mostly been conducted by means of more physician-based outcome measures. The goal of this study was to evaluate the effect of the Chevron osteotomy for hallux valgus on patients' daily lives using the Foot and Ankle Outcome Score (FAOS) as a validated and a hallux valgus specific patient reported outcome measure (PROM)...
December 2016: Foot
https://www.readbyqxmd.com/read/27830290/a-new-armored-archosauriform-diapsida-archosauromorpha-from-the-marine-middle-triassic-of-china-with-implications-for-the-diverse-life-styles-of-archosauriforms-prior-to-the-diversification-of-archosauria
#11
Chun Li, Xiao-Chun Wu, Li-Jun Zhao, Sterling J Nesbitt, Michelle R Stocker, Li-Ting Wang
Reptiles have a long history of transitioning from terrestrial to semi-aquatic or aquatic environments that stretches back at least 250 million years. Within Archosauria, both living crocodylians and birds have semi-aquatic members. Closer to the root of Archosauria and within the closest relatives of the clade, there is a growing body of evidence that early members of those clades had a semi-aquatic lifestyle. However, the morphological adaptations to a semi-aquatic environment remain equivocal in most cases...
December 2016: Die Naturwissenschaften
https://www.readbyqxmd.com/read/27811391/random-access-actuation-of-nanowire-grid-metamaterial
#12
Pablo Cencillo-Abad, Jun-Yu Ou, Eric Plum, João Valente, Nikolay I Zheludev
While metamaterials offer engineered static optical properties, future artificial media with dynamic random-access control over shape and position of meta-molecules will provide arbitrary control of light propagation. The simplest example of such a reconfigurable metamaterial is a nanowire grid metasurface with subwavelength wire spacing. Recently we demonstrated computationally that such a metadevice with individually controlled wire positions could be used as dynamic diffraction grating, beam steering module and tunable focusing element...
December 2, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27810025/cost-effectiveness-of-different-techniques-in-hallux-valgus-surgery
#13
Emilio Wagner, Cristian Ortiz, Karen Torres, Ivan Contesse, Omar Vela, Diego Zanolli
BACKGROUND: Different surgical techniques are available to correct each type of Hallux Valgus (HV) deformity, and all present similar good results. No information is available relative to the cost of each technique compared to their individual success. OBJECTIVE: To determine the cost-effectiveness-ratio (CER) of five different techniques for HV. METHODS: We included 245HV surgeries performed in 179 patients. The severity was defined according to radiological parameters...
December 2016: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/27771139/correlative-analysis-of-cement-dentin-interfaces-using-an-interfacial-fracture-toughness-and-micro-tensile-bond-strength-approach
#14
Evelise M Souza, Jan De Munck, Pong Pongprueksa, Annelies Van Ende, Bart Van Meerbeek
OBJECTIVES: To determine the interfacial fracture toughness (iFT) and micro-tensile strength (μTBS) of composite cements bonded to dentin. METHODS: Fifty feldspar ceramic blocks (Vita Mark II, Vita Zahnfabrik) were luted onto dentin using two self-adhesive (G-CEM LinkAce, GC; SpeedCEM, Ivoclar Vivadent), two self-etch (Multilink Primer & Multilink Automix, Ivoclar Vivadent; Scotchbond Universal & RelyX Ultimate, 3 M ESPE), and one etch-and-rinse (Excite F DSC & Variolink II, Ivoclar Vivadent) composite cement (n=10)...
December 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27694269/distal-metatarsal-osteotomy-for-moderate-to-severe-hallux-valgus
#15
Spenser J Cassinelli, Renee Herman, Thomas G Harris
Hallux valgus is the most common disorder of the hallux and often results in pain, functional disability, and impaired gait patterns. The goals of surgical management are to correct the deformity while improving patients' pain and function. Traditional treatment of moderate to severe hallux valgus deformities consist of proximal osteotomy and/or arthrodesis given their powerful corrective ability. Despite their corrective power, proximal osteotomies are more technically demanding, have a higher rate of complications, and require a more restricted post-operative recovery...
October 2016: Foot & Ankle International
https://www.readbyqxmd.com/read/27667958/how-reliably-can-northeast-atlantic-sand-lances-of-the-genera-ammodytes-and-hyperoplus-be-distinguished-a-comparative-application-of-morphological-and-molecular-methods
#16
Ralf Thiel, Thomas Knebelsberger
Accurate stock assessments for each of the dominant species of sand lances in the northeast Atlantic Ocean and adjacent areas are not available due to the lack of a reliable identification procedure; therefore, appropriate measures of fisheries management or conservation of sand lances cannot be implemented. In this study, detailed morphological and molecular features are assessed to discriminate between four species of sand lances belonging to the genera Ammodytes and Hyperoplus. Morphological characters described by earlier authors as useful for identification of the genera are confirmed, and two additional distinguishing characters are added...
2016: ZooKeys
https://www.readbyqxmd.com/read/27660292/comparison-of-postoperative-height-changes-of-the-second-metatarsal-among-3-osteotomy-methods-for-hallux-valgus-deformity-correction
#17
Jun Young Choi, Yu Min Suh, Ji Woong Yeom, Jin Soo Suh
BACKGROUND: We aimed to compare the postoperative height of the second metatarsal head relative to the first metatarsal head using axial radiographs among 3 different commonly used osteotomy techniques: proximal chevron metatarsal osteotomy (PCMO), scarf osteotomy, and distal chevron metatarsal osteotomy (DCMO). METHODS: We retrospectively reviewed the radiographs and clinical findings of the patients with painful callosities under the second metatarsal head, complicated by hallux valgus, who underwent isolated PCMO, scarf osteotomy, or DCMO from February 2005 to January 2015...
January 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/27598613/-comparison-of-90%C3%A2-and-180%C3%A2-plate-constructions-for-comminuted-distal-humerus-fractures-in-adults-and-effects-on-clinical-results
#18
Volkan Eryuva, Taşkın Altay, Cemil Kayalı, Zafer Kement, Caner Çıtak
BACKGROUND: The present objective was to compare 90° and 180° double-plate constructions for complex distal humerus fractures, as well as to evaluate superiority of construction type. METHODS: Retrospectively evaluated were 17 patients treated for type C distal humerus fracture according to AO/ASIF classification between January 2009 and January 2013. All attended minimum 6-month follow-up. Elbow function was assessed with anteroposterior and lateral x-ray, and Mayo elbow performance score evaluation at outpatient clinics...
July 2016: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/27597427/treatment-of-crowe-type-iv-hip-dysplasia-using-cementless-total-hip-arthroplasty-and-double-chevron-subtrochanteric-shortening-osteotomy-a-5-to-10-year-follow-up-study
#19
Xigong Li, Yang Lu, Junying Sun, Xiangjin Lin, Tiansi Tang
BACKGROUND: The purpose of this study was to evaluate the functional and radiographic results of patients with Crowe type-IV hip dysplasia treated by cementless total hip arthroplasty and double chevron subtrochanteric osteotomy. METHODS: From January 2000 to February 2006, cementless total hip arthroplasty with a double chevron subtrochanteric shortening osteotomy was performed on 18 patients (22 hips) with Crowe type-IV dysplasia. The acetabular cup was placed in the position of the anatomic hip center, and subtrochanteric femoral shortening osteotomy was performed with the use of a double chevron design...
August 10, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27587521/correction-of-moderate-to-severe-hallux-valgus-with-combined-proximal-opening-wedge-and-distal-chevron-osteotomies-a-reliable-technique
#20
L Jeyaseelan, S Chandrashekar, A Mulligan, H A Bosman, A J S Watson
AIMS: The mainstay of surgical correction of hallux valgus is first metatarsal osteotomy, either proximally or distally. We present a technique of combining a distal chevron osteotomy with a proximal opening wedge osteotomy, for the correction of moderate to severe hallux valgus. PATIENTS AND METHODS: We reviewed 45 patients (49 feet) who had undergone double osteotomy. Outcome was assessed using the American Orthopaedic Foot and Ankle Society (AOFAS) and the Short Form (SF) -36 Health Survey scores...
September 2016: Bone & Joint Journal
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