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https://www.readbyqxmd.com/read/29054726/a-comparison-of-walking-gait-following-mechanical-and-kinematic-alignment-in-total-knee-joint-replacement
#1
Peter J McNair, Mark G Boocock, Nicholas D Dominick, Richard J Kelly, Bill J Farrington, Simon W Young
BACKGROUND: Although previous studies have compared radiological, pain, and function scores in kinematically aligned (KA) and mechanically aligned (MA) total knee arthroplasty (TKA), no previous studies have undertaken a three-dimensional (3D) gait analysis in these groups. This study compared kinematic and kinetic variables recorded during level walking in patients at least 2 years post-surgery who underwent an MA or KA procedure. METHODS: Utilizing a 9-camera motion analysis system, gait analysis was undertaken on 29 patients (MA = 15, KA = 14)...
September 21, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29051868/minimally-invasive-joint-replacement-surgery-where-are-we-now
#2
EDITORIAL
Cheung Man Hong
No abstract text is available yet for this article.
May 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/29040144/surgical-treatment-of-dentofacial-deformities-caused-by-juvenile-idiopathic-arthritis
#3
Patricia Stoor, Zlatan Hodzic, Sirpa Arte
The purpose of our retrospective study was to evaluate the results of orthognathic treatment, distraction osteogenesis, and/or prosthetic reconstruction of the temporomandibular joints in patients with juvenile idiopathic arthritis (JIA).Twelve patients with severely affected temporomandibular joints (TMJs) and reduced ramus height were treated with mandibular advancement with orthognathic surgery (11) and additional bilateral or unilateral mandibular ramus distraction (3) or additional bilateral or unilateral prosthetic reconstruction of the TMJ (3)...
October 16, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29040128/single-dose-preoperative-vitamin-d-supplementation-decreases-infection-in-a-mouse-model-of-periprosthetic-joint-infection
#4
Vishal Hegde, Erik M Dworsky, Alexandra I Stavrakis, Amanda H Loftin, Stephen D Zoller, Howard Y Park, Sherif Richman, Daniel Johansen, Yan Hu, Julie A Taylor, Christopher D Hamad, Rene F Chun, Weixian Xi, John S Adams, Nicholas M Bernthal
BACKGROUND: Despite recent advances, infection remains the most common etiology of arthroplasty failure. Recent work suggests that 25-hydroxyvitamin D (25D) deficiency correlates with the frequency of periprosthetic joint infection (PJI). We endeavored to examine whether 25D3 deficiency leads to increased bacterial burden in vivo in an established mouse model of PJI and, if so, whether this effect can be reversed by preoperative 25D3 supplementation. METHODS: Mice (lys-EGFP) possessing fluorescent neutrophils were fed a vitamin D3-sufficient (n = 20) or deficient (n = 40) diet for 6 weeks...
October 18, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29032353/rates-of-joint-replacement-surgery-in-new-zealand-1999-2015-a-comparison-of-rheumatoid-arthritis-and-osteoarthritis
#5
Lisa K Stamp, Janine Haslett, Peter Chapman, John O'Donnell, Rafi Raja, Alastair Rothwell, Christopher Frampton, Gary Hooper
OBJECTIVE: To determine rates of joint replacement for people with rheumatoid arthritis (RA) and osteoarthritis (OA) and to examine the characteristics of those receiving elbow replacements. METHODS: Data were extracted from the New Zealand Joint Registry from 1999 to 2015 and annual rates calculated. RESULTS: Rates of joint replacement increased over time for OA but not RA. Elbow replacement was the only procedure performed more commonly in RA...
October 15, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/29029935/review-the-relationship-of-hemoglobin-a1c-to-postoperative-surgical-risk-with-an-emphasis-on-joint-replacement-surgery
#6
REVIEW
Lizette F Lopez, Peter D Reaven, Sherman M Harman
Patients with diabetes mellitus are known to have a high risk of postoperative complications, including infections, impaired wound healing, cardiovascular events, venous thromboembolism, and mortality. Because hyperglycemia has been thought to mediate this risk, there is a clinical propensity for improving glycemic control, as assessed by hemoglobin A1c (HbA1c) level, prior to proceeding with elective surgery, particularly joint replacement surgery. However, it is not established whether chronic poor glycemic control, indicated by elevated HbA1c levels, predicts increased risk of postoperative complications...
September 7, 2017: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/29025397/a-qualitative-study-of-patient-education-needs-for-hip-and-knee-replacement
#7
Deborah Kennedy, Amy Wainwright, Lucy Pereira, Susan Robarts, Patricia Dickson, Jennifer Christian, Fiona Webster
BACKGROUND: Quality health information is key to patient engagement, self-management and an enhanced healthcare experience. There is strong evidence to support involving patients and their families in the development and evaluation of health-related educational material. These factors were the impetus for our high volume joint replacement centre to undertake a qualitative study to elicit patient experiences to inform the development of effective strategies and education along the care continuum for hip and knee replacement...
October 12, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29024597/significant-chondrocyte-viability-is-present-in-acetabular-chondral-flaps-associated-with-femoroacetabular-impingement
#8
Vonda J Wright, Christopher Laurence McCrum, Hongshuai Li, Michael J Tranovich, Johnny Huard
BACKGROUND: Patients presenting with cam deformity of the femoral head and neck sustain repeated trauma to the articular cartilage of the superior acetabulum, with chondral delamination injuries found during hip arthroscopy. Two previous studies reveal conflicting chondrocyte viability data in these traumatic cartilage injuries. The full-thickness nature of flaps may suggest that chondrocytes residing in the cartilage flap matrix in the joint environment would remain viable despite shear trauma...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29016590/endoscopic-endonasal-transsphenoidal-approach-to-pituitary-adenoma-a-multi-disciplinary-approach
#9
Deepak Regmi, Amit Thapa, Bidur Kc, Bikram Shakya
BACKGROUND: The excellent visualization and minimally invasive approach employed in endoscopic endonasal procedures has now revolutionized the pituitary surgery, replacing the transnasal microscopic technique worldwide. However, it involves major shift in hand-eye co-ordination from static 3 dimensional images of microscope to 2 dimensional endoscopic images hence demands training and inter-disciplinary approach. Here we present our experiences in learning and developing a safe endonasal transsphenoidal endoscopic approach to resect pituitary adenomas...
September 8, 2017: Journal of Nepal Health Research Council
https://www.readbyqxmd.com/read/28994021/radial-head-prosthesis-surgical-tips-and-tricks
#10
A Marinelli, E Guerra, A Ritali, M Cavallo, R Rotini
Radial head prostheses (RHP) have been developed to decrease the complications rate following a radial head resection surgery. The aim of the RHP is to replicate the physiological radiocapitellar tracking, reproducing the mechanical function of the native radial head: to stabilize the elbow and to shear the forces passing through the elbow along with the other stabilizers. The currently used RHP models try to achieve this target with three different prosthesis' strategies: (a) loose fit stem, (b) bipolar radial head or (c) anatomical radial head...
October 9, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28983214/factors-associated-with-choice-and-success-of-one-versus-two-stage-revision-arthroplasty-for-infected-hip-and-knee-prostheses
#11
Lucas Castellani, Nick Daneman, Samira Mubareka, Richard Jenkinson
BACKGROUND: Prosthetic joint infections (PJI) of hip and knee arthroplasties are becoming increasingly common with an aging population and an increasing demand for these procedures. Despite attempts at standardization, medical and surgical approaches vary widely among practitioners. QUESTIONS/PURPOSES: We first sought to determine if there were specific factors associated with choice of one- versus two-stage revision. Then we investigated whether the type of revision approach influenced clinical treatment success...
October 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/28974377/persistent-opioid-use-following-total-knee-arthroplasty-a-signal-for-close-surveillance
#12
Robert S Namba, Maria C S Inacio, Nicole L Pratt, Stephen E Graves, Elizabeth E Roughead, Elizabeth W Paxton
BACKGROUND: Prolonged opioid use following total knee arthroplasty (TKA) has not been extensively studied. METHODS: A cohort study of primary TKA for osteoarthritis using an integrated healthcare system and Total Joint Replacement Registry (January 2008-December 2011) was conducted. Opioid use during the first year after TKA was the exposure of interest and cumulative daily oral morphine equivalent (OME) amounts were calculated. Total postsurgical OME per 90-day exposure periods were categorized into quartiles...
September 13, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28971359/baropodometry-on-patients-after-total-knee-arthroplasty
#13
A Notarnicola, G Maccagnano, A Fiore, A Spinarelli, L Montenegro, M Paoloni, F Pastore, S Tafuri, B Moretti
PURPOSE: It is well known that total knee replacement surgery decreases pain and improves function, but the effect on postural assessment needs to be studied better with the use of new technological devices. Total knee arthroplasty (TKA) improves motor coordination and stability of the knee. On the other hand, changing joint functionality can modify the balance. The aim of this trial is to record and analyze the static and dynamic baropodometric data of patients in the first few months following joint replacement...
October 3, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28969761/role-of-nuclear-medicine-for-diagnosing-infection-of-recently-implanted-lower-extremity-arthroplasties
#14
REVIEW
Christopher J Palestro, Charito Love
Infection is an infrequent complication of lower extremity prosthetic joint surgery. Approximately one-third develop within 3 months (early), another third within 1 year (delayed), and the remainder more than 1 year (late) after surgery. Diagnosing prosthetic joint infection, especially in the early postoperative period during the first year, is challenging. Pain is almost always present. The presence of fever is variable, ranging from less than 5% to more than 40% of patients. Leukocytosis is a poor predictor of infection...
November 2017: Seminars in Nuclear Medicine
https://www.readbyqxmd.com/read/28965944/predictors-of-outcome-after-primary-total-joint-replacement
#15
Markus Weber, Benjamin Craiovan, Michael L Woerner, Timo Schwarz, Joachim Grifka, Tobias F Renkawitz
BACKGROUND: Total hip and knee replacements are frequently performed curative treatment options in end-stage arthritis. In this study, we analyzed clinical outcome, complications, and predictors of outcome in modern joint replacement. METHODS: In a retrospective analysis of over 2000 primary total hip and knee replacements from our institutional joint registry, responder rates for positive outcome as defined by the OMERACT-OARSI criteria, postoperative complication rates, and patient-reported outcome measures (EQ-5D, WOMAC) within the first year were compared between hip and knee replacements...
September 7, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28965577/effects-of-biological-factors-and-health-condition-on-mercury-and-selenium-concentrations-in-the-cartilage-meniscus-and-anterior-cruciate-ligament
#16
Danuta I Kosik-Bogacka, Natalia Lanocha-Arendarczyk, Karolina Kot, Zaneta Ciosek, Pawel Zietek, Maciej Karaczun, Bogumila Pilarczyk, Agnieszka Tomza-Marciniak, Joanna Podlasinska, Elzbieta Kalisinska, Joanna Pyzia
Due the long-term nature of joint tissue remodeling processes, knee structures including meniscus and anterior cruciate ligament (ACL) can be a model for studying the bioaccumulation of mercury (Hg) and selenium (Se). The accumulation and retention of Hg in human tissues can have a negative effect on the proper functioning of homeostasis-affecting organisms. A factor of chronic poisoning with Hg forms is probably the Se:Hg ratio in tissues. Se:Hg molar ratios below one may increase Hg toxicity potentials, while molar ratios that approach or exceed one effectively may protect against Hg toxicity...
December 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28954037/periprosthetic-humeral-fractures-after-reverse-shoulder-arthroplasty-case-report
#17
Andre Wajnsztejn, Noel Oizerovici Foni, Dan Oizerovici, Robinson Esteves Santos Pires, Benno Ejnisman
Periprosthetic fractures is a severe complication after joint replacement. The rapidly increase of reverse shoulder arthroplasty surgeries, periprosthetic humeral fractures, which are described as rare, may increase in the near future. We report the case of displaced humeral fracture bellow the stem of reverse shoulder prosthesis. The patient was an 85-year-old woman who had a total shoulder replacement 6 years previously. The surgical solution consisted of plate osteossynthesis and cerclage. This report describes an unprecedented case in Brazilian literature; and gives an overview of the existing literature including this injury classification...
September 21, 2017: Einstein
https://www.readbyqxmd.com/read/28951054/recent-trends-in-blood-utilization-after-revision-hip-and-knee-arthroplasty
#18
Robert A Burnett, Nicholas A Bedard, David E DeMik, Yubo Gao, Steve S Liu, John J Callaghan
BACKGROUND: Blood transfusion guidelines in elective surgery have been implemented over the last decade to minimize risk and cost related to transfusion without sacrificing patient outcomes. Blood utilization in primary total hip (THA) and total knee arthroplasty (TKA) has been extensively studied but there is a paucity of studies evaluating utilization in revision THA and TKA. The purpose of this study is to evaluate current trends in transfusion following revision THA and TKA. METHODS: The Humana dataset was reviewed for transfusion trends from 2007 to 2015 for patients undergoing revision THA and TKA...
September 5, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28944833/low-doses-of-co-nanoparticles-induce-death-and-regulate-osteogenic-differentiation-in-mg%C3%A2-63-cells
#19
Qinglin Han, Fan Liu
The aim of the present study was to investigate the effects of cobalt nanoparticles (CoNPs) on the proliferation and differentiation of human osteoblasts in vitro, and to investigate the molecular mechanisms via which CoNPs affect proliferation and differentiation of osteoblasts. The MG‑63 human osteoblast cell line was treated with different concentrations of CoNPs for 12 to 48 h in vitro. At each time point, cell morphology was observed and an MTT assay was performed to assess cell viability. Alkaline phosphatase (ALP), osteocalcin (BGLAP), collagen I (COL I), osteoprotegerin (OPG) and receptor activator of nuclear factor κ‑B ligand mRNA expression levels, and ALP, BGLAP and COL protein expression levels, were assessed by reverse transcription‑quantitative polymerase chain reaction and western blotting, respectively...
November 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28934543/long-term-results-of-intercalary-endoprosthetic-short-segment-fixation-following-extended-diaphysectomy
#20
Nicholas S Tedesco, Alexandra L Van Horn, Robert M Henshaw
Intercalary endoprosthetic reconstruction following diaphyseal resection of osseous tumors offers functional advantages through preservation of native joints adjacent to the resected defect. Use of such implants is restricted by the amount of bone available for stem fixation adjacent to the defect. This study aimed to determine whether short osseous segment fixation with acceptable outcomes and complication rate can be reliably achieved with a customized intercalary endoprosthesis following extended diaphysectomy...
September 21, 2017: Orthopedics
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