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https://www.readbyqxmd.com/read/28528349/high-wear-resistance-of-femoral-components-coated-with-titanium-nitride-a-retrieval-analysis
#1
Christian Fabry, Carmen Zietz, Axel Baumann, Reinhard Ehall, Rainer Bader
PURPOSE: The objective of this study was to evaluate the in vivo wear resistance of cobalt-chromium femoral components coated with titanium nitride (TiN). Our null hypothesis was that the surface damage and the thickness of the TiN coating do not correlate with the time in vivo. METHODS: Twenty-five TiN-coated bicondylar femoral retrievals with a mean implantation period of 30.7 ± 11.7 months were subjected to an objective surface damage analysis with a semi-quantitative assessment method...
May 20, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28528258/epidemiology-and-management-of-chronic-thromboembolic-pulmonary-hypertension-experience-from-two-expert-centers
#2
Maria Anna Bazmpani, Alexandra Arvanitaki, Maria Toumpourleka, Georgia Pitsiou, Evaggelia Panagiotidou, Sophia Anastasia Mouratoglou, Georgios Sianos, Stavros Hadjimiltiades, Antonios Pitsis, Eckhard Mayer, Ioannis Stanopoulos, Haralambos Karvounis, George Giannakoulas
BACKGROUND: Chronic thromboembolic pulmonary hypertension (CTEPH) is a rare, distinct pulmonary vascular disease, and, therefore, there is lack of data regarding its clinical presentation, diagnosis and management at a national basis. Our objective was to describe the demographics and management of CTEPH patients in Northern Greece. METHODS: We conducted a retrospective, observational study with a joint collaboration from two pulmonary hypertension expert centers in Greece and included patients diagnosed with CTEPH...
May 17, 2017: Hellenic Journal of Cardiology: HJC, Hellēnikē Kardiologikē Epitheōrēsē
https://www.readbyqxmd.com/read/28528195/repulsive-surfaces-and-lamellar-lubrication-of-synovial-joints
#3
Zenon Pawlak, Kehinde Q Yusuf, Raghuvir Pai, Wieslaw Urbaniak
Surface-active phospholipid (SAPL) secreted in the synovial joint plays an important role in cartilage integrity. In healthy joints, phospholipid multibilayers coat the cartilage surface, providing boundary lamellar-repulsive hydration lubrication. Current mechanism for lubrication of synovial joints, as well as the physical and chemical nature of the cartilage surface is discussed. Friction between phospholipid (PL) bilayers attached to cartilage surfaces is considered including a discussion on the recent observation of an extreme friction reduction as a consequence of a less charged hydrophilic cartilage surface...
May 17, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28528004/potential-contributions-of-skeletal-muscle-contractile-dysfunction-to-altered-biomechanics-in-obesity
#4
REVIEW
Lance M Bollinger
Obesity alters whole body kinematics and joint kinetics during activities of daily living which are thought to contribute to increased risk of musculoskeletal injury, development of lower extremity joint osteoarthritis (OA), and physical disability. To date, it has widely been accepted that excess adipose tissue mass is the major driver of biomechanical alterations in obesity. However, it is well established that obesity is a systemic disease affecting numerous, if not all, organ systems of the body. Indeed, obesity elicits numerous adaptations within skeletal muscle, including alterations in muscle structure (ex...
May 13, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28527884/adjuvant-medications-that-improve-survival-after-locoregional-therapy
#5
F Edward Boas, Etay Ziv, Hooman Yarmohammadi, Karen T Brown, Joseph P Erinjeri, Constantinos T Sofocleous, James J Harding, Stephen B Solomon
PURPOSE: To determine if outpatient medications taken at the time of liver tumor embolization or ablation affect survival. MATERIALS AND METHODS: A retrospective review was done of 2,032 liver tumor embolization, radioembolization, and ablation procedures performed in 1,092 patients from June 2009 to April 2016. Pathology, hepatocellular carcinoma (HCC) stage (American Joint Committee on Cancer), neuroendocrine tumor (NET) grade, initial locoregional therapy, overall survival after initial locoregional therapy, Child-Pugh score, Eastern Cooperative Oncology Group performance status, Charlson Comorbidity Index, and outpatient medications taken at the time of locoregional therapy were analyzed for each patient...
May 17, 2017: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28527846/characterization-of-dental-pulp-myofibroblasts-in-rat-molars-after-pulpotomy
#6
Naoki Edanami, Nagako Yoshiba, Naoto Ohkura, Ryosuke Takeuchi, Aiko Tohma, Yuichiro Noiri, Kunihiko Yoshiba
INTRODUCTION: Myofibroblasts express alpha smooth muscle actin (α-SMA) and play a critical role in wound healing. Myofibroblast differentiation is controlled by the joint actions of transforming growth factor beta 1 (TGF-β1) and the extradomain A fibronectin splice variant (EDA-FN). Currently, the contribution of myofibroblasts to dental pulp healing is unknown. Therefore, we analyzed expressional characteristics of α-SMA-positive cells and investigated TGF-β1, EDA-FN, and α-SMA expression levels after pulpotomy to better understand dental pulp healing...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527820/adventitial-cystic-disease-of-radial-artery-apropos-of-a-case-and-review-of-literature
#7
Álvaro Torres-Blanco, Luis Ariel Pepén-Moquete, Vicente Molina-Nácher, Francisco Gómez-Palonés
Adventitial cystic disease is an uncommon condition that is characterized by the collection of mucinous material that accumulates in the adventitial layer of the artery. Predominantly, this entity affects the popliteal artery, whereas it is extremely rare in the radial artery. We report a 72-year-old female patient that underwent surgical treatment of an adventitial cyst of the right radial artery. The involved arterial segment was resected, and reconstruction by means of the interposition of a saphenous vein graft was performed...
May 11, 2017: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/28527700/failure-of-hightibialvarus-osteotomy-for-lateral-tibio-femoral-osteoarthritis-with-10%C3%A2-of-valgus-outcomes-in-19-patients
#8
G Mirouse, A Dubory, F Roubineau, A Poignard, P Hernigou, J Allain, C H Flouzat Lachaniette
BACKGROUND: Osteotomy is a rational approach to slowing knee osteoarthritis progression by modifying loads, thereby avoiding joint replacement in younger individuals. Varus femoral osteotomy is recommended only in patients with more than 10° of valgus. The objective here was to assess outcomes of tibialvarus osteotomy in patients with lateral compartment tibio-femoral osteoarthritis and less than 10° of valgus. MATERIAL AND METHODS: A single-centre retrospective study was conducted in 19 consecutive patients managed by high tibialvarus osteotomy between January 2005 and May 2012...
May 17, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28527684/patient-perceptions-regarding-outpatient-hip-and-knee-arthroplasties
#9
R Michael Meneghini, Mary Ziemba-Davis
BACKGROUND: There has been increasing interest in outpatient total joint arthroplasty (TJA) in the orthopedic community, but how patients feel about outpatient TJA is unknown. The purpose of this study was to understand patient perspectives on hip and knee replacements performed in an outpatient setting. METHODS: We surveyed 110 consecutive patients scheduled for primary TJA in an academic suburban arthroplasty practice regarding their knowledge and perceptions of outpatient TJA...
April 13, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28527584/a-combined-passive-and-active-musculoskeletal-model-study-to-estimate-l4-l5-load-sharing
#10
F Azari, N Arjmand, A Shirazi-Adl, T Rahimi-Moghaddam
A number of geometrically-detailed passive finite element (FE) models of the lumbar spine have been developed and validated under in vitro loading conditions. These models are devoid of muscles and thus cannot be directly used to simulate in vivo loading conditions acting on the lumbar joint structures or spinal implants. Gravity loads and muscle forces estimated by a trunk musculoskeletal (MS) model under twelve static activities were applied to a passive FE model of the L4-L5 segment to estimate load sharing among the joint structures (disc, ligaments, and facets) under simulated in vivo loading conditions...
May 11, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28527534/austerity-and-the-sector-wide-approach-to-health-the-mozambique-experience
#11
James Pfeiffer, Sarah Gimbel, Baltazar Chilundo, Stephen Gloyd, Rachel Chapman, Kenneth Sherr
Fiscal austerity policies imposed by the IMF have reduced investments in social services, leaving post-independence nations like Mozambique struggling to recover from civil war and high disease burden. By 2000, a sector-wide approach (SWAp) was promoted to maximize aid effectiveness. 'Like-minded' bilateral donors, from Europe and Canada, promoted a unified approach to health sector support focusing on joint planning, common basket funding, and streamlined monitoring and evaluation to improve sector coordination, amplify country ownership, and build sustainable health systems...
May 4, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28527428/physicochemical-and-biological-interactions-between-cerium-oxide-nanoparticles-and-a-1-8-naphthalimide-derivative
#12
Gerardo Pulido-Reyes, Esperanza Martín, J L Gu Coronado, Francisco Leganes, Roberto Rosal, Francisca Fernández-Piñas
Cerium (Ce) oxide nanoparticles (CNPs) have attracted attention due to their high bioactivity and unique redox-chemistry. The oxygen vacancies at the surface of the nanoparticle explain the autocatalytic properties of CNPs in which the Ce(3+) atoms occupy the center of the oxygen vacancies surrounded by Ce(4+) atoms. Until now, CNPs have been associated with organic molecules at the synthesis stage to extend their applications or improve their stability. However, there is a lack of information regarding the post-synthesis interaction of CNPs and organic molecules that could enhance or induce new properties...
May 10, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28527422/index-of-difficulty-and-side-of-space-are-accommodated-during-the-selection-and-planning-of-a-joint-action
#13
Matthew Ray, John de Grosbois, Timothy N Welsh
Co-actors can facilitate the achievement of a shared goal by accurately anticipating each other's needs and subsequently planning actions to accommodate those needs. The purpose of the present study was to determine if co-actors plan and execute their movements to accommodate the difficulty of their partners' action. We hypothesized that information derived from shared task representations could influence the simulation of other's actions and that motor experience would enhance the ability of co-actor's to anticipate their co-actor's needs...
May 17, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28527285/-genetic-diversity-of-extraintestinal-escherichia-coli-strains-producers-of-beta-lactamases-tem-shv-and-ctx-m-associated-with-healthcare
#14
Yasmin Varela, Beatriz Millán, María Araque
INTRODUCTION: There are few reports from Venezuela describing the genetic basis that sustains the pathogenic potential and phylogenetics of Escherichia coli extraintestinal strains isolated in health care units. OBJECTIVE: To establish the genetic diversity of extraintestinal E. coli strains producers of betalactamases TEM, SHV and CTX-M associated with healthcare. MATERIALS AND METHODS: We studied a collection of 12 strains of extraintestinal E...
June 1, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/28527160/study-of-bone-mineral-density-bmd-in-patients-with-rheumatoid-arthritis-and-its-co-relation-with-severity-of-the-disease
#15
Liyakat Ali Gauri, Qadir Fatima, Sharanbasu Diggi, Asim Khan, Ambreen Liyakat, B R Ajay
INTRODUCTION: Rheumatoid arthritis (RA) is a chronic inflammatory disease of unknown etiology marked by a symmetric, peripheral polyarthritis.1-3 People with rheumatoid arthritis are at increased risk of osteoporosis. Hence this article intends to highlight the importance of BMD measurement in patients with RA as a tool for assessment of disease activity and severity. OBJECTIVE: To evaluate Bone Mineral Density in patients of Rheumatoid Arthritis and Co-relate it with severity of disease...
April 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/28526923/focal-articular-prosthetic-resurfacing-for-the-treatment-of-full-thickness-articular-cartilage-defects-in-the-knee-12-year-follow-up-of-two-cases-and-review-of-the-literature
#16
C Becher, E B Cantiller
INTRODUCTION: The rationale of focal articular prosthetic resurfacing used as a primary arthroplasty procedure in the treatment of articular cartilage defects is still under debate. Conflicting reports raise concern about high rates of re-operations and continued development of osteoarthritis, while others have reported good outcomes. The goal of this paper is to present the long-term results of two patients with a 12-year follow-up and to report the results of a literature review. MATERIALS AND METHODS: Two patients (male, 70 years; female 63 years) with a follow-up of 12 years were reviewed...
May 19, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28526894/association-of-hla-b27-with-ankylosing-spondylitis-and-clinical-features-of-the-hla-b27-associated-ankylosing-spondylitis-a-meta-analysis
#17
Hai Lin, Yi-Zhen Gong
Many studies have estimated the correlation between HLA-B27 polymorphisms and ankylosing spondylitis (AS). However, the results were controversial. Therefore, we performed this meta-analysis to determine the association of HLA-B*27 polymorphisms with AS and investigate the impacts of HLA-B27 on the clinical symptoms of AS patients. A comprehensive search was performed in PubMed, Web of Science and Embase databases to retrieve the eligible studies, which addressed the association between HLA-B27 polymorphisms and AS susceptibility...
May 19, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28526794/raffinose-induces-biofilm-formation-by-streptococcus-mutans-in-low-concentrations-of-sucrose-by-increasing-production-of-extracellular-dna-and-fructan
#18
Ryo Nagasawa, Tsutomu Sato, Hidenobu Senpuku
Streptococcus mutans is the primary etiological agent of dental caries and causes tooth decay by forming a firmly attached biofilm on tooth surfaces. Biofilm formation is induced by the presence of sucrose, which is a substrate for the synthesis of extracellular polysaccharides, but not in the presence of oligosaccharides. Nonetheless, in this study, we found that raffinose, which is an oligosaccharide with an intestinal regulatory function and antiallergic effect, induced biofilm formation by S. mutans in a mixed culture with sucrose which was at concentrations less than those required to induce biofilm formation directly...
May 19, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28526593/cardiac-tamponade-as-an-initial-presentation-for-systemic-lupus-erythematosus
#19
William Li, Thomas Frohwein, Kenneth Ong
Systemic lupus erythematosus (SLE) is a chronic autoimmune inflammatory disease which follows a relapsing and remitting course that can manifest in any organ system. While classic manifestations consist of arthralgia, myalgia, frank arthritis, a malar rash and renal failure to name a few, cardiac tamponade, however, is a far less common and far more dangerous presentation. We highlight the case of a 61year-old male with complaints of acute onset shortness of breath and generalized body aches associated with a fever and chills in the ER...
April 29, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28526569/total-joint-replacement-for-neglected-posterior-knee-dislocation-following-septic-arthritis-after-arthroscopy
#20
Yusuf Öztürkmen, Yunus Emre Akman, Ethem Ayhan Ünkar, Erhan Şükür
This report presents the first case of a knee dislocation following septic arthritis after arthroscopy. A 65-year-old woman had an arthroscopy with irrigation and debridement (I&D) of the joint and microfracture for the chondral lesions. She had complaints of postarthroscopic infection but non-steroidal anti-inflammatory medication and local ice compression was recommended. She revisited her physician twice and at the last visit she had a large purulent effusion in her knee. The gram stain of the joint fluid aspirate demonstrated gram-positive cocci and the cultures grew methicilline-sensitive Staphylococcus aureus...
May 16, 2017: Acta Orthopaedica et Traumatologica Turcica
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