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https://www.readbyqxmd.com/read/28643709/comparison-of-central-corneal-thickness-with-four-noncontact-devices-an-agreement-analysis-of-swept-source-technology
#1
Erhan Ozyol, Pelin Özyol
PURPOSE: The purpose of this study was to compare the central corneal thickness (CCT) measurements of four noncontact devices in healthy eyes. MATERIALS AND METHODS: In a sample of 45 healthy controls, CCT was measured using an optical biometer (IOLMaster 700) based on swept-source optical coherence tomography (SS-OCT), high-resolution rotating Scheimpflug camera system (Pentacam HR), spectral-domain OCT (SD-OCT) device with an anterior segment module (Spectralis), and noncontact pachymetry (NCP) device (Topcon TRK-2P)...
June 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28622559/controlling-sunbathing-safety-during-the-summer-holidays-the-solar-uv-campaign-at-baltic-sea-coast-in-2015
#2
Jakub Guzikowski, Agnieszka E Czerwińska, Janusz W Krzyścin, Michał A Czerwiński
Information regarding the intensity of surface UV radiation, provided for the public, is frequently given in terms of a daily maximum UV Index (UVI), based on a prognostic model. The quality of the UV forecast depends on the accuracy of column amount of ozone and cloudiness prediction. Daily variability of UVI is needed to determine the risk of the UV overexposure during outdoor activities. Various methods of estimating the temporary UVI and the maximum duration of UV exposures (received a dose equal to minimal erythemal dose - MED), at the site of sunbathing, were compared...
April 8, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28606638/retrospective-cohort-study-on-radial-head-replacements-comparing-results-between-smooth-and-porous-stem-designs
#3
Mélissa Laflamme, Pierre-Philippe Grenier-Gauthier, Alexandre Leclerc, Stéphanie Antoniades, Anne-Marie Bédard
BACKGROUND: When necessary, radial head integrity after a fracture can be re-created by the use of a radial head arthroplasty if the radial head is judged irreparable. The purpose of this study was to compare the clinical and radiographic outcomes of metal modular radial head replacements with a smooth vs. a porous stem. METHODS: A retrospective cohort study of radial head replacements performed in the first 4 weeks after a trauma in an adult patient at our institution between 2000 and 2014 was completed...
June 9, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28593060/fracture-of-the-tibial-baseplate-16-years-after-miller-galante-ii-total-knee-arthroplasty
#4
Kazuaki Mineta, Masahiko Okada, Soshi Matsumoto, Daisuke Hamada, Tomohiro Goto, Koichi Sairyo
We report a rare case of tibial baseplate fracture of Miller-Galante II (MG II) prosthesis. We examine the factors that may cause such late fracture and review the literature on radiographic analysis and retrieval studies. A 76-year-old woman, who had undergone bilateral MG II total knee arthroplasty due to rheumatoid arthritis 16 years earlier, presented to our department with a 3-month history of left knee pain. Plain radiographs revealed severe distortion of the medial tibial component. During revision knee arthroplasty, we observed severe metallosis in the knee joint, polyethylene insert deformation, and posteromedial coronal baseplate fracture...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28578684/metal-on-metal-hip-resurfacing-in-patients-younger-than-50%C3%A2-years-a-retrospective-analysis-1285-cases-12-year-survivorship
#5
Melissa D Gaillard, Thomas P Gross
BACKGROUND: The Nordic registry reports patients under 50 years old with total hip replacements realize only 83% 10-year implant survivorship. These results do not meet the 95% 10-year survivorship guideline posed by the UK's National Institute for Health and Care Excellence (NICE) in 2014. METHODS: The purpose of this study is threefold: First, we evaluate if metal-on-metal hip resurfacing arthroplasty meets these high standards in younger patients. Next, we compare outcomes between age groups to determine if younger patients are at higher risk for revision or complication...
June 2, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28566407/pelvic-reconstruction-following-resection-of-malignant-bone-tumours-using-a-stemmed-acetabular-pedestal-cup
#6
C Hipfl, C Stihsen, S E Puchner, A Kaider, M Dominkus, P T Funovics, R Windhager
AIMS: Pelvic reconstruction after the resection of a tumour around the acetabulum is a challenging procedure due to the complex anatomy and biomechanics. Several pelvic endoprostheses have been introduced, but the rates of complication remain high. Our aim was to review the use of a stemmed acetabular pedestal cup in the management of these patients. PATIENTS AND METHODS: The study involved 48 patients who underwent periacetabular reconstruction using a stemmed pedestal cup (Schoellner cup; Zimmer Biomet Inc...
June 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28559547/comparison-of-ocular-biometric-measurements-between-a-new-swept-source-optical-coherence-tomography-and-a-common-optical-low-coherence-reflectometry
#7
Rongrong Gao, Hao Chen, Giacomo Savini, Yaxin Miao, Xiaorui Wang, Jing Yang, Weiqi Zhao, Qinmei Wang, Jinhai Huang
The purpose of the current study was to compare the measurements between a new optical biometer based on swept-source optical coherence tomography (SS-OCT), the OA-2000 (Tomey, Japan), and an optical biometer based on optical low coherence reflectometry (OLCR), the Lenstar (Haag-Streit, Switzerland). Ninety-nine eyes of 99 healthy subjects were included. The axial length (AL), central corneal thickness (CCT), anterior chamber depth (ACD), aqueous depth (AD), lens thickness (LT), keratometry (K) readings, including flat K (Kf), steep K (Ks), mean K (Km), astigmatism vectors J0, J45 at diameters of 2...
May 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28550975/corneo-scleral-limbal-changes-following-short-term-soft-contact-lens-wear
#8
Alejandra Consejo, Maciej M Bartuzel, D Robert Iskander
PURPOSE: To assess whether short-term soft contact lens wear alters the anterior eye surface. METHODS: Twenty-two neophyte subjects wore soft contact lenses for a period of five hours. Topography based corneo-scleral limbal radius estimates were derived from height measurements acquired with a corneo-scleral profilometer. Additionally, central corneal thickness (CCT), anterior chamber depth (ACD), corneal curvature radius (R) and white-to-white (WTW) diameter were acquired with an OCT-assisted biometer...
May 24, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28549891/synthesis-and-pharmacological-evaluation-of-novel-chromone-derivatives-as-balanced-multifunctional-agents-against-alzheimer-s-disease
#9
Fan Li, Jia-Jia Wu, Jin Wang, Xue-Lian Yang, Pei Cai, Qiao-Hong Liu, Ling-Yi Kong, Xiao-Bing Wang
In a continuing effort to develop multitargeted compounds as potential treatment agents against Alzheimer's disease (AD), a series of chromone derivatives were designed, synthesized and evaluated. In vitro assay indicated that most of the target compounds have both MAOs inhibition activities, antioxidant activity and biometal chelating ability. Especially, compound s19 exhibits good inhibitory potency for inhibition of MAOs (IC50 value of 5.12μM for hMAO-A and 0.816μM for hMAO-B), moderate inhibition of Aβ aggregation (75...
May 17, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28546470/ocular-changes-over-60-minutes-in-supine-and-prone-postures
#10
Allison P Anderson, Gautam Babu, Jacob G Swan, Scott D Phillips, Darin A Knaus, Christine M Toutain-Kidd, Michael E Zegans, Abigail M Fellows, Jiang Gui, Jay C Buckey
Some astronauts are returning from long duration spaceflight with structural ocular and visual changes. We investigated both the transient and sustained effects of changes in the direction of the gravity vector acting on the eye using changes in body posture. Intraocular pressure (IOP-Perkins tonometer), ocular geometry (axial length, corneal thickness, and aqueous depth-noncontact biometer), and the choroidal (volume and subfoveal thickness optical coherence tomography) was measured in 10 subjects (5M, 5F)...
May 25, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28521479/association-between-non-melanoma-and-melanoma-skin-cancer-rates-vitamin-d-and-latitude
#11
Miguel Rivas, Elisa Rojas, Gloria M Calaf, Marcela Barberán, Claudio Liberman, Marcelo De Paula Correa
Vitamin D synthesis takes place in the skin due to solar ultraviolet-B (UVB) radiation. Several studies have shown the association between low sun exposure, non-melanoma skin cancer (NMSC) and a lack of vitamin D synthesis. Since such synthesis in the body depends on the exposure of the skin to solar UVB radiation (290-320 nm), experimental measurements of this type of solar radiation are important. Tarapaca University in Arica, Chile, established a solar UV radiation laboratory in 2006 and since then this laboratory has performed systematic experimental solar UVB measurements using a calibrated biometer instrument...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28502536/results-of-a-modular-revision-system-in-total-knee-arthroplasty
#12
David A Crawford, Keith R Berend, Michael J Morris, Joanne B Adams, Adolph V Lombardi
BACKGROUND: Revision total knee arthroplasty (TKA) poses unique challenges compared with primary TKA such as bone loss, deformity, and ligament instability. Modular component options allow flexibility to deal with these complexities. The purpose of this study was to evaluate midterm outcomes for revision TKA using a modular revision knee system with complete interchangeability and multiple options for augmentation, offset, constraint, and stem extensions. METHODS: A query of our practice registry revealed 257 consented patients (274 knees and 278 TKA) with minimum 2-year follow-up who underwent aseptic revision TKA with a modular system (Vanguard Super Stabilized Knee; Zimmer Biomet, Warsaw, IN) between 2005 and 2013...
April 10, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28500578/the-relationship-between-copper-iron-and-selenium-levels-and-alzheimer-disease
#13
Felipe Nathanael Coelho Vaz, Bárbara Luisa Fermino, Maria Vaitsa Loch Haskel, Jéssica Wouk, Guilherme Barroso Langoni de Freitas, Roberta Fabbri, Erik Montagna, João Batista Teixeira Rocha, Juliana Sartori Bonini
This study aimed to evaluate the concentrations of copper, iron, and selenium in elderly people with Alzheimer disease (AD), comparing the same parameters in a paired group of healthy people, in order to verify if the amount of these metals may influence the cognitive impairment progression. Patients' cognitive impairment was evaluated by Clinical Dementia Rating (CDR). The elementary quantification of erythrocytes was performed by inductively coupled plasma mass spectrometry technique. The statistical analyses were carried out by SPSS software 20...
May 13, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28481387/trapeziectomy-with-ligament-reconstruction-and-tendon-interposition-versus-a-trapeziometacarpal-prosthesis-for-the-treatment-of-thumb-basal-joint-osteoarthritis
#14
María José Robles-Molina, Francisco López-Caba, Rafael C Gómez-Sánchez, Encarnación Cárdenas-Grande, Miguel Pajares-López, Pedro Hernández-Cortés
Numerous surgical procedures have been described to treat trapeziometacarpal osteoarthritis, but no approach is currently considered superior. Good long-term outcomes have been reported with multiple procedures. No studies have been published comparing outcomes of the Arpe joint replacement (Biomet, Valence, France) with those of ligament reconstruction and tendon interposition (LRTI) using the Burton-Pellegrini technique. The study objective was to compare clinical outcomes between these techniques. Sixty-five patients with Eaton stage III osteoarthritis of the thumb were included in this retrospective follow-up study...
May 8, 2017: Orthopedics
https://www.readbyqxmd.com/read/28476062/patient-reported-outcomes-following-single-and-multiple-radius-total-knee-replacement-a-randomized-controlled-trial
#15
Nadeem Mushtaq, Alexander D Liddle, David Isaac, Katherine Dillow, Paul Gill
Although single-radius (SR) designs of total knee replacement (TKR) have theoretical benefits, the clinical advantage conferred by such designs is unknown. The aim of this randomized, controlled study was to compare the short-term clinical outcomes of the two design rationales. A total of 105 knees were randomized to receive either a single radius (Scorpio, Stryker; SR Group) or multiple radius (AGC, Zimmer Biomet; MR group) TKR. Patient-reported outcomes (Oxford Knee Score [OKS] and Knee Society Score [KSS]) were collected at 6 weeks, 6 months, and 1 year following surgery...
May 5, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28471917/radial-neck-dilatory-remodeling-following-radial-head-arthroplasty-with-an-uncemented-press-fit-fully-chemically-etched-stem-design
#16
Matthew P Sullivan, Reza Firoozabadi, Stephen A Kennedy, Julie Agel, Eric Magnusson, Brett Schiffman, Matthew Folchert, Daphne Beingessner
OBJECTIVES: To compare the radiographic outcomes of two widely used side loading, press fit, radial head arthroplasty implants used to reconstruct complex elbow trauma. DESIGN: Retrospective cohort study SETTING:: Level 1 Academic trauma center PARTICIPANTS:: Patients undergoing radial head arthroplasty INTERVENTION:: Cohort 1 received Synthes Radial Head Prosthesis. Cohort 2 received Biomet ExploR Radial Head Replacement. MAIN OUTCOME MEASUREMENTS: Radial neck dilatory remodeling RESULTS:: 82 subjects were included in final analysis, 63 from the Biomet Cohort and 19 from Synthes cohort...
April 27, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28461737/comparison-of-the-biometric-measurements-calculated-with-zeiss-iol-master-and-wavelight-ob-820
#17
Georgios Labiris, Panagiota Ntonti, Konstantinos Ntitsos, Andreas Katsanos, Haris Sideroudi, Vasilios Kozobolis
BACKGROUND: The primary objective of this study was to investigate the level of agreement between IOL-Master and OB-820 ocular biometers. MATERIALS AND METHODS: In this prospective randomized case series, we measured the anterior chamber depth (ACD), the axial length (AL), the corneal radii (R1, R2), the ratio of mean corneal radius and spherical equivalent and the corneal astigmatism (cylinder [Cyl]) before and after cataract extraction surgery. RESULTS: Significant differences between pre- and postoperative data were observed for ACD for both biometric devices (P<0...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28458136/design-synthesis-and-evaluation-of-scutellarein-o-acetamidoalkylbenzylamines-as-potential-multifunctional-agents-for-the-treatment-of-alzheimer-s-disease
#18
Zhipei Sang, Xiaoming Qiang, Yan Li, Rui Xu, Zhongcheng Cao, Qing Song, Ting Wang, Xiaoyu Zhang, Hongyan Liu, Zhenghuai Tan, Yong Deng
A series of scutellarein-O-acetamidoalkylbenzylamines derivatives were designed based on a multitarget-directed ligands strategy for the treatment of Alzheimer's disease. Among these compounds, compound T-22 demonstrated excellent acetylcholinesterase inhibitory, moderate inhibitory effects on self-induced Aβ1-42 aggregation, Cu(2+)-induced Aβ1-42 aggregation, human AChE-induced Aβ1-40 aggregation and disassembled Cu(2+)-induced aggregation of the well-structured Aβ1-42 fibrils, and also acted as potential antioxidant and biometals chelator...
April 23, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28439701/the-influence-of-different-sets-of-surgical-instrumentation-in-oxford-uka-on-bearing-size-and-component-position
#19
Tilman Walker, Pascal Heinemann, Thomas Bruckner, Marcus R Streit, Stefan Kinkel, Tobias Gotterbarm
INTRODUCTION: The Oxford unicompartmental knee arthroplasty (OUKA) has been proven to be an effective treatment for anteromedial osteoarthritis of the knee joint. New instrumentation has been introduced to improve the reproducibility of implant positioning and to minimize bone loss during tibial resection (Oxford Microplasty; Zimmer Biomet, Warsaw, Indiana, USA). METHODS: To assess the effect of the new instrumentation, we retrospectively evaluated the postoperative radiographs and surgical records of 300 OUKAs in three consecutive cohorts of patients...
April 24, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28437496/novel-solution-for-massive-glenoid-defects-in-shoulder-arthroplasty-a-patient-specific-glenoid-vault-reconstruction-system
#20
David M Dines, Lawrence Gulotta, Edward V Craig, Joshua S Dines
Complex glenoid deformities present the most difficult challenges in shoulder arthroplasty. These deformities may be caused by severe degenerative or congenital deformity, posttraumatic anatomy, tumor, or, in most cases, bone loss after glenoid failure in anatomical total shoulder arthroplasty. Methods of treating severe bone loss have included inlay and onlay bone-graft options with augmented fixation and, in severe cases, salvage hemiarthroplasty with limited goal expectations. Unfortunately, none of these methods has provided consistently satisfactory reproducible results...
March 2017: American Journal of Orthopedics
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