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https://www.readbyqxmd.com/read/29788776/lenstar%C3%A2-ls-900-vs-pentacam%C3%A2-axl-comparative-study-of-ocular-biometric-measurements-and-intraocular-lens-power-calculation
#1
Joana Maria Mendes Pereira, Arminda Neves, Pedro Alfaiate, Mónica Santos, Henrique Aragão, João C Sousa
PURPOSE: Comparison of biometric measurements and calculation of intraocular lens with a new biometer (Pentacam®-AXL, Oculus, Germany) and a reference biometer (Lenstar LS 900®, Haag-Streit AG, Switzerland), in order to assess the agreement between these two devices. SETTING: Centro Hospitalar de Leiria, Portugal Materials and methods: Prospective, institutional study, in which measurements of axial length, anterior chamber depth from the corneal epithelium and endothelium to the anterior surface of the lens (anterior chamber depth ext and anterior chamber depth int), central corneal thickness and keratometry readings of the flattest and steepest meridians (K1 and K2) were obtained with the two systems...
May 1, 2018: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/29770644/comparative-efficacy-of-the-new-optical-biometer-on-intraocular-lens-power-calculation-al-scan-versus-iolmaster
#2
Ahnul Ha, Won Ryang Wee, Mee Kum Kim
PURPOSE: To evaluate the agreement in axial length (AL), keratometry, and anterior chamber depth measurements between AL-Scan and IOLMaster biometers and to compare the efficacy of the AL-Scan on intraocular lens (IOL) power calculations and refractive outcomes with those obtained by the IOLMaster. METHODS: Medical records of 48 eyes from 48 patients who underwent uneventful phacoemulsification and IOL insertion were retrospectively reviewed. One of the two types of monofocal aspheric IOLs were implanted (Tecnis ZCB00 [Tecnis, n = 34] or CT Asphina 509M [Asphina, n = 14])...
May 15, 2018: Korean Journal of Ophthalmology: KJO
https://www.readbyqxmd.com/read/29767270/no-correlation-between-rotation-of-femoral-components-in-the-transverse-plane-and-clinical-outcome-after-total-knee-arthroplasty
#3
Roland Becker, Katharina Bäker, Hagen Hommel, Manfred Bernard, Sebastian Kopf
PURPOSE: It was hypothesized that malrotation of femoral component in total knee arthroplasty (TKA) will significantly impact clinical outcome. METHODS: Eighty-eight consecutive patients with primary osteoarthritis of the knee were prospectively evaluated. They received a cemented posterior stabilized TKA (NexGen, Zimmer/Biomet® Inc., Warsaw, IN, USA). The femoral component was placed in 3° of external rotation referenced to the posterior condylar line. Postoperatively, a CT scan was performed to evaluate rotation of femoral component in the transverse plane...
May 16, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29761254/catroxmp-ii-a-heme-modulated-fibrinogenolytic-metalloproteinase-isolated-from-crotalus-atrox-venom
#4
Montamas Suntravat, Paul R Langlais, Elda E Sánchez, Vance G Nielsen
It has been recently demonstrated that the hemotoxic venom activity of several species of snakes can be inhibited by carbon monoxide (CO) or a metheme forming agent. These and other data suggest that the biometal, heme, may be attached to venom enzymes and may be modulated by CO. A novel fibrinogenolytic metalloproteinase, named CatroxMP-II, was isolated and purified from the venom of a Crotalus atrox viper, and subjected to proteolysis and mass spectroscopy. An ion similar to the predicted singly charged m/z of heme at 617...
May 14, 2018: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/29729985/novel-8-hydroxyquinoline-derivatives-targeting-%C3%AE-amyloid-aggregation-metal-chelation-and-oxidative-stress-against-alzheimer-s-disease
#5
Xuelian Yang, Pei Cai, Qiaohong Liu, Jiajia Wu, Yong Yin, Xiaobing Wang, Lingyi Kong
A series of multitargeted 8-hydroxyquinoline derivatives were designed and synthesized for the treatment of Alzheimer's disease (AD). In vitro studies indicated that most of the prepared compounds exhibited significant inhibitory effects against self-induced Aβ1-42 aggregation and potential antioxidant properties especially compound 5b (IC50  = 5.64 μM for self-induced Aβ aggregation; the oxygen radical absorbance capacity using fluorescein (ORAC-FL) value is 2.63 Trolox equivalents). Notably, 5b can chelate biometals and inhibit Cu2+ /Zn2+ -induced Aβ1-42 aggregation...
April 22, 2018: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29700651/comparison-of-anterior-segment-parameters-and-axial-length-measurements-performed-on-a-scheimpflug-device-with-biometry-function-and-a-reference-optical-biometer
#6
Maria Muzyka-Woźniak, Adam Oleszko
PURPOSE: To compare measurements of axial length (AL), corneal curvature (K), anterior chamber depth (ACD) and white-to-white (WTW) distance on a new device combining Scheimpflug camera and partial coherence interferometry (Pentacam AXL) with a reference optical biometer (IOL Master 500). To evaluate differences between IOL power calculations based on the two biometers. METHODS: Ninety-seven eyes of 97 consecutive cataract or refractive lens exchange patients were examined preoperatively on IOL Master 500 and Pentacam AXL units...
April 26, 2018: International Ophthalmology
https://www.readbyqxmd.com/read/29689110/comparison-of-a-new-biometer-using-swept-source-optical-coherence-tomography-and-a-conventional-biometer-using-partial-coherence-interferometry
#7
Tomoaki Higashiyama, Hazuki Mori, Fumi Nakajima, Masahito Ohji
The aim of this study was to compare the axial lengths (ALs) using a new biometer with swept-source optical coherence tomography (Argos) versus ALs using a conventional biometer with partial coherence interferometry (IOL Master, version 5). The ALs in 48 eyes of 48 cataract patients were measured with Argos using refractive indexes that correspond to the particular tissue and with IOL Master using a single refractive index. The eyes were divided into three subgroups by AL length: short-AL group (n = 16), <23...
2018: PloS One
https://www.readbyqxmd.com/read/29688240/nanoscale-synchrotron-x-ray-speciation-of-iron-and-calcium-compounds-in-amyloid-plaque-cores-from-alzheimer-s-disease-subjects
#8
James Everett, Joanna F Collingwood, Vindy Tjendana-Tjhin, Jake Brooks, Frederik Lermyte, Germán Plascencia-Villa, Ian Hands-Portman, Jon Dobson, George Perry, Neil D Telling
Altered metabolism of biometals in the brain is a key feature of Alzheimer's disease, and biometal interactions with amyloid-β are linked to amyloid plaque formation. Iron-rich aggregates, including evidence for the mixed-valence iron oxide magnetite, are associated with amyloid plaques. To test the hypothesis that increased chemical reduction of iron, as observed in vitro in the presence of aggregating amyloid-β, may occur at sites of amyloid plaque formation in the human brain, the nanoscale distribution and physicochemical states of biometals, particularly iron, were characterised in isolated amyloid plaque cores from human Alzheimer's disease cases using synchrotron X-ray spectromicroscopy...
April 24, 2018: Nanoscale
https://www.readbyqxmd.com/read/29669067/microvascular-anastomosis-proposition-of-a-learning-curve
#9
Pooneh Mokhtari, Ali Tayebi Meybodi, Arnau Benet, Michael T Lawton
BACKGROUND: Learning to perform a microvascular anastomosis is one of the most difficult tasks in cerebrovascular surgery. Previous studies offer little regarding the optimal protocols to maximize learning efficiency. This failure stems mainly from lack of knowledge about the learning curve of this task. OBJECTIVE: To delineate this learning curve and provide information about its various features including acquisition, improvement, consistency, stability, and recall...
April 14, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29657845/long-term-bone-remodelling-around-legendary-cementless-femoral-stems
#10
Charles Rivière, Guido Grappiolo, Charles A Engh, Jean-Pierre Vidalain, Antonia-F Chen, Nicolas Boehler, Jihad Matta, Pascal-André Vendittoli
Bone remodelling around a stem is an unavoidable long-term physiological process highly related to implant design. For some predisposed patients, it can lead to periprosthetic bone loss secondary to severe stress-shielding, which is thought to be detrimental by contributing to late loosening, late periprosthetic fracture, and thus rendering revision surgery more complicated.However, these concerns remain theoretical, since late loosening has yet to be documented among bone ingrowth cementless stems demonstrating periprosthetic bone loss associated with stress-shielding...
February 2018: EFORT Open Reviews
https://www.readbyqxmd.com/read/29652173/a-review-of-commercially-available-point-of-care-devices-to-concentrate-bone-marrow-for-the-treatment-of-osteoarthritis-and-focal-cartilage-lesions
#11
Florian Gaul, William D Bugbee, Heinz R Hoenecke, Darryl D D'Lima
Objective Mesenchymal stem cells (MSCs) are a promising cell-based therapy treatment option for several orthopedic indications. Because culture expansion of MSC is time and cost intensive, a bedside concentration of bone marrow (BM) aspirate is used as an alternative. Many commercial systems are available but the available literature and knowledge regarding these systems is limited. We compared different point-of-care devices that concentrate BM (BMC) by focusing on technical features and quality parameters to help surgeons make informed decisions while selecting the appropriate device...
April 1, 2018: Cartilage
https://www.readbyqxmd.com/read/29629592/revision-of-failed-total-ankle-arthroplasty-to-a-hindfoot-fusion
#12
A A Ali, R A Forrester, P O'Connor, N J Harris
Aims The aim of this study was to present a series of patients with aseptic failure of a total ankle arthroplasty (TAA) who were treated with fusion of the hindfoot using a nail. Patients and Methods A total of 23 TAAs, in 22 patients, were revised for aseptic loosening and balloon osteolysis to a hindfoot fusion by a single surgeon (NH) between January 2012 and August 2014. The procedure was carried out without bone graft using the Phoenix, Biomet Hindfoot Arthrodesis Nail. Preoperative investigations included full blood count, CRP and ESR, and radiological investigations including plain radiographs and CT scans...
April 1, 2018: Bone & Joint Journal
https://www.readbyqxmd.com/read/29616216/microstructure-evolution-in-mg-zn-zr-gd-biodegradable-alloy-the-decisive-bridge-between-extrusion-temperature-and-performance
#13
Huai Yao, Jiu-Ba Wen, Yi Xiong, Yan Lu, Marko Huttula
Being a biocompatible metal with similar mechanical properties as bones, magnesium bears both biodegradability suitable for bone substitution and chemical reactivity detrimental in bio-ambiences. To benefit its biomaterial applications, we developed Mg-2.0Zn-0.5Zr-3.0Gd (wt%) alloy through hot extrusion and tailored its biodegradability by just varying the extrusion temperatures during alloy preparations. The as-cast alloy is composed of the α-Mg matrix, a network of the fish-bone shaped and ellipsoidal (Mg, Zn)3 Gd phase, and a lamellar long period stacking ordered phase...
2018: Frontiers in Chemistry
https://www.readbyqxmd.com/read/29611846/implant-survivorship-and-complication-rates-after-total-knee-arthroplasty-with-a-third-generation-cemented-system-15-year-follow-up
#14
Muthana Sartawi, David Zurakowski, Aaron Rosenberg
This work is a retrospective cohort study evaluating patients who had undergone third-generation cemented total knee arthroplasty (TKA) with prostheses (NexGen, Zimmer Biomet) utilizing posterior-stabilized (PS) and cruciate-retaining (CR) designs at a single center at their 15-year follow-up. The purpose of this study is to determine the functional knee scores, reoperations, and long-term survivorship for patients with the NexGen Zimmer Biomet Knee system at the 15-year follow-up. In total, 99 patients who had undergone primary TKA were followed for 15 years...
March 2018: American Journal of Orthopedics
https://www.readbyqxmd.com/read/29608844/iron-redox-chemistry-promotes-antiparallel-oligomerization-of-%C3%AE-synuclein
#15
Dinendra L Abeyawardhane, Ricardo D Fernández, Cody J Murgas, Denver R Heitger, Ashley K Forney, Madeleine K Crozier, Heather R Lucas
Brain metal dyshomeostasis and altered structural dynamics of the presynaptic protein α-synuclein (αS) are both implicated in the pathology of Parkinson's disease (PD), yet a mechanistic understanding of disease progression in the context of αS structure and metal interactions remains elusive. In this Communication, we detail the influence of iron, a prevalent redox-active brain biometal, on the aggregation propensity and secondary structure of N-terminally acetylated αS (NAc αS), the physiologically relevant form in humans...
April 2, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29607857/analysis-of-corneal-astigmatism-with-nidek-axial-length-scan-in-caucasian-cataract-surgery-candidates
#16
R Duman, R Duman, E Cetinkaya, M C Sabaner, S Inan, M Doğan, I Doğan
Aims and Objectives: The aim of the study was to analyze and quantify the pattern of corneal astigmatism in Caucasian cataract surgery patients using a new optical biometer (axial length [AL] Scan, NIDEK Co., Gamagori, Japan). Patients and Methods: The datasets of cataract surgery patients acquired between March 1, 2014, and April 15, 2016, were collected and analyzed. The corneal power (flat keratometry, steep keratometry, and mean keratometry), negative cylinder power, and axis of astigmatism were recorded...
April 2018: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/29577442/diet-and-risk-of-myopia-in-three-year-old-singapore-children-the-gusto-cohort
#17
Sharon Y-L Chua, Charumathi Sabanayagam, Chuen-Seng Tan, Laurence S Lim, Jia-Ying Toh, Yap-Seng Chong, Peter D Gluckman, Fabian Yap, Ching-Yu Cheng, Cheryl S Ngo, Tien-Yin Wong, Mary F-F Chong, Seang-Mei Saw
BACKGROUND: To investigate the relationship between dietary intakes at six, nine and 12 months and risk of myopia in three-year-old children in a birth cohort. METHODS: Three hundred and seventeen children from the Growing Up in Singapore Towards Healthy Outcomes (GUSTO) study were included. Dietary intake at six, nine and 12 months of age was ascertained using either 24-hour recalls or three-day food diaries completed by parents. Cycloplegia was achieved with three drops of one per cent cycloplentolate instilled at five minute intervals...
March 25, 2018: Clinical & Experimental Optometry: Journal of the Australian Optometrical Association
https://www.readbyqxmd.com/read/29557402/the-role-of-dental-implant-abutment-design-on-the-aesthetic-outcome-preliminary-3-month-post-loading-results-from-a-multicentre-split-mouth-randomised-controlled-trial-comparing-two-different-abutment-designs
#18
Marco Esposito, Daniele Cardaropoli, Luca Gobbato, Fabio Scutellà, Andrea Fabianelli, Saverio Mascellani, Gianluca Delli Ficorelli, Fabio Mazzocco, Luca Sbricoli, Anna Trullenque-Eriksson
PURPOSE: To evaluate whether there are aesthetic and clinical benefits to using a newly designed abutment (Curvomax), over a conventional control abutment (GingiHue). MATERIALS AND METHODS: A total of 49 patients, who required at least two implants, had two sites randomised according to a split-mouth design to receive one abutment of each type at seven different centres. The time of loading (immediate, early or delayed) and of prosthesis (provisional crowns of fixed prosthesis) was decided by the clinicians, but they had to restore both implants in a similar way...
2018: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/29529704/early-experience-with-a-short-tapered-titanium-porous-plasma-sprayed-stem-with-updated-design
#19
Adolph V Lombardi, Antonio G Manocchio, Keith R Berend, Michael J Morris, Joanne B Adams
INTRODUCTION: Short stem femoral components in primary total hip arthroplasty (THA) have increased in popularity since the advent of minimally invasive surgical techniques. The concept of a short stem is particularly compatible with tapered designs where the goal is to offload forces proximally in the femur. The purpose of this retrospective review was to review our early experience with a short, tapered titanium femoral component with updated design features. MATERIALS AND METHODS: Beginning in November 2011 through February 2012, 92 consented patients (93 hips), at a single center, were treated with primary cementless THA using a short stem, tapered femoral component (Taperloc® Complete Microplasty; Zimmer Biomet, Warsaw, Indiana) and were available for review with a minimum two-year follow-up...
March 12, 2018: Surgical Technology International
https://www.readbyqxmd.com/read/29526560/biomechanical-simulation-of-temporomandibular-joint-replacement-tmjr-devices-a-scoping-review-of-the-finite-element-method
#20
REVIEW
Y L Rodrigues, M T Mathew, L G Mercuri, J S P da Silva, B Henriques, J C M Souza
The aim of this study was to perform a literature review on the use of finite element modeling (FEM) for the evaluation of the biomechanical behavior of temporomandibular joint replacement (TMJR) devices. An electronic search of online medical and scientific literature database was conducted using selected search terms. The search identified 307 studies, of which 19 were considered relevant to this study. Of the 19 selected studies, 10 (52.6%) investigated the influence of geometry and fixation methods, while two (10...
March 8, 2018: International Journal of Oral and Maxillofacial Surgery
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