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https://www.readbyqxmd.com/read/28345610/early-loss-of-subchondral-bone-following-microfracture-is-counteracted-by-bone-marrow-aspirate-in-a-translational-model-of-osteochondral-repair
#1
Liang Gao, Patrick Orth, Kathrin Müller-Brandt, Lars K H Goebel, Magali Cucchiarini, Henning Madry
Microfracture of cartilage defects may induce alterations of the subchondral bone in the mid- and long-term, yet very little is known about their onset. Possibly, these changes may be avoided by an enhanced microfracture technique with additional application of bone marrow aspirate. In this study, full-thickness chondral defects in the knee joints of minipigs were either treated with (1) debridement down to the subchondral bone plate alone, (2) debridement with microfracture, or (3) microfracture with additional application of bone marrow aspirate...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28345597/post-traumatic-osteoarthritis-in-mice-following-mechanical-injury-to-the-synovial-joint
#2
Muhammad Farooq Rai, Xin Duan, James D Quirk, Nilsson Holguin, Eric J Schmidt, Nobuaki Chinzei, Matthew J Silva, Linda J Sandell
We investigated the spectrum of lesions characteristic of post-traumatic osteoarthritis (PTOA) across the knee joint in response to mechanical injury. We hypothesized that alteration in knee joint stability in mice reproduces molecular and structural features of PTOA that would suggest potential therapeutic targets in humans. The right knees of eight-week old male mice from two recombinant inbred lines (LGXSM-6 and LGXSM-33) were subjected to axial tibial compression. Three separate loading magnitudes were applied: 6N, 9N, and 12N...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28345410/transplantation-of-chemically-processed-decellularized-meniscal-allografts
#3
Kolja Gelse, Ludwig Körber, Martin Schöne, Kay Raum, Peter Koch, Milena Pachowsky, Götz Welsch, Roman Breiter
Objective The aim of this study was to evaluate the chondroprotective effect of chemically decellularized meniscal allografts transplanted into the knee joints of adult merino sheep. Methods Lateral sheep meniscal allografts were chemically processed by a multistep method to yield acellular, sterile grafts. The grafts were transplanted into the knee joints of sheep that were treated by lateral meniscectomy. Joints treated by meniscectomy only and untreated joints served as controls. The joints were analyzed morphologically 6 and 26 weeks after surgery by the macroscopical and histological OARSI (Osteoarthritis Research Society International) score...
April 2017: Cartilage
https://www.readbyqxmd.com/read/28345409/osteoarthritis-in-football
#4
Gian M Salzmann, Stefan Preiss, Marcy Zenobi-Wong, Laurent P Harder, Dirk Maier, Jirí Dvorák
Football is currently the most popular sporting activity in the world. Multiple reports have shown that a high incidence of osteoarthritis is found in football players. Evidence clearly shows that traumatic injury significantly predisposes players for such pathophysiology. Injuries are frequent in amateur as well as professional football players, with knee and ankle accounting for the most severe injuries. Many professional athletes lose playing time due to injuries and many are forced into early retirement...
April 2017: Cartilage
https://www.readbyqxmd.com/read/28345407/knee-menisci
#5
James Kevin Bryceland, Andrew John Powell, Thomas Nunn
The menisci of the knees are semicircular fibrocartilaginous structures consisting of a hydrophilic extracellular matrix containing a network of collagen fibers, glycoproteins, and proteoglycans maintained by a cellular component. The menisci are responsible for more than 50% of load transmission across the knee and increase joint congruity thereby also aiding in fluid film lubrication of the joint. In the United Kingdom, meniscal tears are the most common form of intra-articular knee injury and one of the commonest indications for orthopedic intervention...
April 2017: Cartilage
https://www.readbyqxmd.com/read/28345356/dysregulation-of-tissue-factor-thrombin-activatable-fibrinolysis-inhibitor-and-fibrinogen-in-patients-undergoing-total-joint-arthroplasty
#6
Christopher Wanderling, Jeffrey Liles, Elissa Finkler, Peter Carlsgaard, William Hopkinson, Nil Guler, Debra Hoppensteadt, Jawed Fareed
Total joint arthroplasty (TJA) of the hip or knee (THA, TKA) has become an increasingly common procedure. While TJA is a successful treatment for individuals experiencing degenerative joint diseases, it is well known that one of the most common perioperative complications of TJA is deep venous thrombosis (DVT). To profile tissue factor (TF), microparticle-tissue factor (MP-TF), thrombin-activatable fibrinolysis inhibitor (TAFI), and fibrinogen levels in patients undergoing TJA to determine potential preexisting Hemostatic dysregulation...
January 1, 2017: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/28344905/evolution-of-the-patellar-sesamoid-bone-in-mammals
#7
Mark E Samuels, Sophie Regnault, John R Hutchinson
The patella is a sesamoid bone located in the major extensor tendon of the knee joint, in the hindlimb of many tetrapods. Although numerous aspects of knee morphology are ancient and conserved among most tetrapods, the evolutionary occurrence of an ossified patella is highly variable. Among extant (crown clade) groups it is found in most birds, most lizards, the monotreme mammals and almost all placental mammals, but it is absent in most marsupial mammals as well as many reptiles. Here, we integrate data from the literature and first-hand studies of fossil and recent skeletal remains to reconstruct the evolution of the mammalian patella...
2017: PeerJ
https://www.readbyqxmd.com/read/28344755/effect-of-topical-application-of-nigella-sativa-oil-and-oral-acetaminophen-on-pain-in-elderly-with-knee-osteoarthritis-a-crossover-clinical-trial
#8
Akram Kooshki, Reza Forouzan, Mohammad Hassan Rakhshani, Maryam Mohammadi
BACKGROUND: Limited evidence supports Nigella sativa's role as an effective complementary and alternative medicine and the anti-inflammatory effects of Nigella sativa on patients with allergic rhinitis. OBJECTIVE: The aim of this study was to investigate the effect of topical application of Nigella sativa oil and oral acetaminophen on pain in the elderly with knee osteoarthritis residing in a parents' home in Sabzevar. METHODS: This study is done as a crossover clinical trial...
November 2016: Electronic Physician
https://www.readbyqxmd.com/read/28344594/articular-inflammation-induced-by-an-enzymatically-inactive-lys49-phospholipase-a2-activation-of-endogenous-phospholipases-contributes-to-the-pronociceptive-effect
#9
Renata Gonçalves Dias, Sandra Coccuzzo Sampaio, Morena Brazil Sant'Anna, Fernando Queiroz Cunha, José María Gutiérrez, Bruno Lomonte, Yara Cury, Gisele Picolo
BACKGROUND: Arthritis is a set of inflammatory conditions that induce aching, stiffness, swelling, pain and may cause functional disability with severe consequences to the patient's lives. These are multi-mediated pathologies that cannot be effectively protected and/or treated. Therefore, the aim of this study was to establish a new model of acute arthritis, using a Lys49-PLA2 (Bothrops asper myotoxin II; MT-II) to induce articular inflammation. METHODS: The articular inflammation was induced by MT-II (10 μg/joint) injection into the left tibio-tarsal or femoral-tibial-patellar joints...
2017: Journal of Venomous Animals and Toxins Including Tropical Diseases
https://www.readbyqxmd.com/read/28343870/cd15-focus-score-infection-diagnosis-and-stratification-into-low-virulence-and-high-virulence-microbial-pathogens-in-periprosthetic-joint-infection
#10
V T Krenn, M Liebisch, B Kölbel, N Renz, T Gehrke, M Huber, M G Krukemeyer, A Trampuz, H Resch, V Krenn
INTRODUCTION: The aim of the work was to validate the CD15 focus score for the infection pathology of periprosthetic joint infection in a large group and to clarify whether a stratification into low-virulence and high-virulence microbial pathogens is possible by means of the CD15 focus score (quantification of CD15 positive granulocytes). METHODS: The histopathology of 275 synovial tissue samples taken intraoperatively during revision operations (n=127 hip, n=141 knee, n=2 shoulder, n=5 ankle) was evaluated according to the SLIM consensus classification (SLIM=synovial-like interface membrane)...
January 12, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28343831/stepping-toward-objective-outcomes-a-prospective-analysis-of-step-count-after-total-joint-arthroplasty
#11
Meredith P Crizer, Gregory S Kazarian, Andrew N Fleischman, Jess H Lonner, Mitchell G Maltenfort, Antonia F Chen
BACKGROUND: Functional recovery monitoring after total hip arthroplasty (THA) and total knee arthroplasty (TKA) is often limited to surgeon-based assessment and patient self-reporting rather than objective measures. However, traditional outcomes may not reliably gauge return of function. The goal of this study was to evaluate and compare an objective measure of postoperative recovery, daily step-count, with patient self-reported outcomes. METHODS: Prospectively, 589 patients used a mobile step-tracking application to record daily steps...
March 1, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28343830/fall-risk-score-at-the-time-of-discharge-predicts-readmission-following-total-joint-arthroplasty
#12
Bheeshma Ravi, Zhang Nan, Adam J Schwartz, Henry D Clarke
BACKGROUND: Readmission among Medicare recipients is a leading driver of healthcare expenditure. To date, most predictive tools are too coarse for direct clinical application. Our objective in this study is to determine if a pre-existing tool to identify patients at increased risk for inpatient falls, the Hendrich Fall Risk Score, could be used to accurately identify Medicare patients at increased risk for readmission following arthroplasty, regardless of whether the readmission was due to a fall...
February 24, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28343827/diabetes-mellitus-and-hyperglycemia-and-the-risk-of-aseptic-loosening-in-total-joint-arthroplasty
#13
Hilal Maradit Kremers, Cathy D Schleck, Eric A Lewallen, Dirk R Larson, Andre J Van Wijnen, David G Lewallen
BACKGROUND: It is unknown to what extent diabetes mellitus modifies the long-term risk of aseptic loosening in total hip arthroplasty (THA) and total knee arthroplasty (TKA). We examined the association between diabetes mellitus, perioperative hyperglycemia, and the likelihood of revisions for aseptic loosening. METHODS: We studied 16,085 primary THA and TKA procedures performed at a large tertiary care hospital between 2002 and 2009. All blood glucose values around the time of surgery (within 1 week) were retrieved...
March 2, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28343826/diagnosis-of-periprosthetic-joint-infection-an-algorithm-based-approach
#14
Nicholas T Ting, Craig J Della Valle
BACKGROUND: Periprosthetic joint infection (PJI) remains one of the most challenging and devastating modes of failure after total hip and knee arthroplasties. Despite the profound urgency and impact of PJI on an individual and societal basis, historically, there have not been standardized definitions of and diagnostic algorithms for infection after total joint arthroplasty. METHODS: In a recent symposium, the American Academy of Hip and Knee Surgeons put forth a standardized approach to the prevention, diagnosis, and management of the patient with a suspected PJI...
March 2, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28343648/women-s-experiences-of-undergoing-total-knee-joint-replacement-surgery
#15
Åsa Engström, Jonas Boström, Ann-Christin Karlsson
PURPOSE: The purpose of the study was to describe women's experiences of undergoing total knee joint replacement surgery. DESIGN: A qualitative approach was used. METHOD: A content analysis of the text from interviews with five women was conducted. FINDINGS: The time before surgery was marked by the experience of constant pain, which affected the women negatively in their everyday lives. During surgery, the information provided by the staff gave each woman a sense of security; the women handed over responsibility to the staff and experienced a sensation of relief...
April 2017: Journal of Perianesthesia Nursing: Official Journal of the American Society of PeriAnesthesia Nurses
https://www.readbyqxmd.com/read/28343621/fixed-flexion-knee-radiography-using-a-new-positioning-device-produced-highly-repeatable-measurements-of-joint-space-width-elsa-brasil-musculoskeletal-study-elsa-brasil-msk
#16
Rosa Weiss Telles, Luciana Costa-Silva, Luciana A C Machado, Rodrigo Citton Padilha Dos Reis, Sandhi Maria Barreto
OBJECTIVE: To describe the performance of a non-fluoroscopic fixed-flexion PA radiographic protocol with a new positioning device, developed for the assessment of knee osteoarthritis (OA) in Brazilian Longitudinal Study of Adult Health Musculoskeletal Study (ELSA-Brasil MSK). MATERIAL AND METHODS: A test-retest design including 19 adults (38 knee images) was conducted. Feasibility of the radiographic protocol was assessed by image quality parameters and presence of radioanatomic alignment according to intermargin distance (IMD) values...
March 2017: Revista Brasileira de Reumatologia
https://www.readbyqxmd.com/read/28343615/intra-articular-injection-with-triamcinolone-hexacetonide-in-patients-with-rheumatoid-arthritis-prospective-assessment-of-goniometry-and-joint-inflammation-parameters
#17
Rita Nely Vilar Furtado, Flávia Soares Machado, Karine Rodrigues da Luz, Marla Francisca Dos Santos, Monique Sayuri Konai, Roberta Vilela Lopes, Jamil Natour
OBJECTIVES: To evaluate local joint variables after intra-articular injection with triamcinolone hexacetonide in rheumatoid arthritis patients. METHODS: We blindly and prospectively (baseline, 1, 4, 12 and 24 weeks) evaluated metacarpophalangeal, wrist, elbow, shoulder, knee and ankle joints after triamcinolone hexacetonide intra-articular injection by the following outcome measures: visual analogue scale 0-10cm (VAS) for rest pain (VASR); VAS for movement pain (VASM); VAS for joint swelling (VASSw); flexion (FlexG) and extension (ExtG)...
March 2017: Revista Brasileira de Reumatologia
https://www.readbyqxmd.com/read/28342974/after-total-knee-replacement-younger-patients-demonstrate-superior-balance-control-compared-to-older-patients-when-recovering-from-a-forward-fall
#18
Brian D Street, William Gage
BACKGROUND: National joint replacement registries have reported a substantial growth in younger knee osteoarthritic patients (<55years old) undergoing total knee replacement, however this younger population is generally understudied. Importantly, studies examining experimentally controlled perturbation have shown age-related differences between younger and older healthy adults, whether similar age-related differences exist among total knee replacement patients is unknown. METHODS: A total of 59 participants, including 29 unilateral total knee replacement patients (six-months post-surgery) made up the four experimental groups: 1) younger patient (54...
March 16, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28342819/ankylosis-of-the-knee-after-septic-arthritis-following-anterior-cruciate-ligament-reconstruction-in-a-13-year-old-male
#19
Bastian Mester, Falk Ullerich, Tobias Ohmann, Martin Glombitza, Christian Schoepp
We present the case of an adolescent male developing anankylosis of the knee after septic arthritis following anterior cruciate ligamentreconstruction (ACLR).The patientwas shifted to our institutionwithpostoperative septic arthritis associated with a systemic septic condition. Before, repeated arthroscopic surgery had beenconductedwithoutany improvement. MRI showed a concomitant osteomyelitis. The infection (Gächter IV, S. aureus) was controlled by an open surgical approach and graft removal.An increasing joint stiffness wasdocumented...
March 22, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28342722/the-effects-of-graft-size-and-insertion-site-location-during-anterior-cruciate-ligament-reconstruction-on-intercondylar-notch-impingement
#20
Alexander D Orsi, Paul K Canavan, Askhan Vaziri, Ruben Goebel, Onaly A Kapasi, Hamid Nayeb-Hashemi
BACKGROUND: Intercondylar notch impingement is detrimental to the anterior cruciate ligament (ACL). Notchplasty is a preventative remodeling procedure performed on the intercondylar notch during ACL reconstruction (ACLR). This study investigates how ACL graft geometry and both tibial and femoral insertion site location may affect ACL-intercondylar notch interactions post ACLR. A range of ACL graft sizes are reported during ACLR, from six millimeters to 11mm in diameter. Variability of three millimeters in ACL insertion site location is reported during ACLR...
March 22, 2017: Knee
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