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Knee meniscus tear

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https://www.readbyqxmd.com/read/28090444/bone-marrow-edema-like-lesions-bmels-are-associated-with-higher-t1%C3%AF-and-t2-values-of-cartilage-in-anterior-cruciate-ligament-acl-reconstructed-knees-a-longitudinal-study
#1
Jingshan Gong, Valentina Pedoia, Luca Facchetti, Thomas M Link, C Benjamin Ma, Xiaojuan Li
BACKGROUND: To evaluate the longitudinal changes of bone marrow edema-like lesions (BMELs) in patients after anterior cruciate ligament (ACL) reconstruction and to investigate the effect of BMELs on cartilage matrix composition changes measured using MR T1ρ and T2 mapping. METHODS: Patients with acute ACL tear were enrolled in a prospective study. MR imaging was performed at baseline (before surgeries) and at 6-month, 1-year and 2-year after ACL reconstruction...
December 2016: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28089224/loading-of-the-medial-meniscus-in-the-acl-deficient-knee-a-multibody-computational-study
#2
Trent M Guess, Swithin Razu
The menisci of the knee reduce tibiofemoral contact pressures and aid in knee lubrication and nourishment. Meniscal injury occurs in half of knees sustaining anterior cruciate ligament injury and the vast majority of tears in the medial meniscus transpire in the posterior horn region. In this study, computational multibody models of the knee were derived from medical images and passive leg motion for two female subjects. The models were validated against experimental measures available in the literature and then used to evaluate medial meniscus contact force and internal hoop tension...
January 11, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28088070/fatigue-life-of-bovine-meniscus-under-longitudinal-and-transverse-tensile-loading
#3
Jaremy J Creechley, Madison E Krentz, Trevor J Lujan
The knee meniscus is composed of a fibrous extracellular matrix that is subjected to large and repeated loads. Consequently, the meniscus is frequently torn, and a potential mechanism for failure is fatigue. The objective of this study was to measure the fatigue life of bovine meniscus when applying cyclic tensile loads either longitudinal or transverse to the principal fiber direction. Fatigue experiments consisted of cyclic loads to 60%, 70%, 80% or 90% of the predicted ultimate tensile strength until failure occurred or 20,000 cycles was reached...
December 27, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28057326/meniscus-morphology-does-tear-type-matter-a-narrative-review-with-focus-on-relevance-for-osteoarthritis-research
#4
REVIEW
Mohamed Jarraya, Frank W Roemer, Martin Englund, Michel D Crema, Heather I Gale, Daichi Hayashi, Jeffrey N Katz, Ali Guermazi
OBJECTIVE: To give a narrative overview of meniscal tears with a radiologic emphasis on the morphologic type, technical considerations, and on the relevance of the type of meniscal tear in the context of osteoarthritis (OA) research. DESIGN: Total 20 years of the PubMed database were searched for epidemiological, radiological, arthroscopic and biomechanical reports, and review articles focusing on meniscal tears in middle-aged and older individuals, in the setting of OA...
November 24, 2016: Seminars in Arthritis and Rheumatism
https://www.readbyqxmd.com/read/28038475/readability-of-online-sources-regarding-meniscal-tears
#5
Jonathan D Hodax, Grayson L Baird, Trevor McBride, Brett D Owens
Meniscal injuries are extremely common, with an incidence of 8.3 per 1,000 person/years in young, active individuals. Patients often turn to the internet to glean information about their injuries, and even to guide decision making about treatment. Much research has been done demonstrating that a reading level of eighth grade or lower is appropriate for accurately communicating written information to patients, yet medical practitioners often fail to meet this requirement. To better examine the information patients receive about meniscal injuries, we set out to evaluate the reading level and content of three commonly used search terms on the three search engines with the largest market share...
December 30, 2016: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28018086/leukocyte-poor-platelet-rich-plasma-to-treat-degenerative-meniscal-tear-a-case-report
#6
J P Betancourt, W D Murrell
A traumatic and/or degenerative meniscus lesion is thought to be a clinical manifestation of early-onset osteoarthritis (OA), which is a chronic progressive condition that can cause substantial pain and disability. Platelet-rich plasma (PRP) is an emerging treatment option that has been reported to improve healing. Here, we present a case of a 29-year-old woman, with left anterior and medial knee pain, without history of trauma or injury. The patient was managed with leukocyte-poor PRP injections derived from her peripheral blood with high concentrations of platelets, platelet-derived growth factors, and bioactive proteins, with a total follow-up of 30 months...
October 2016: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/28012003/effect-of-radial-meniscal-tear-on-in-situ-forces-of-meniscus-and-tibiofemoral-relationship
#7
Yuta Tachibana, Tatsuo Mae, Hiromichi Fujie, Konsei Shino, Tomoki Ohori, Hideki Yoshikawa, Ken Nakata
PURPOSE: To clarify the effect of the radial tear of the lateral meniscus on the in situ meniscus force and the tibiofemoral relationship under axial loads and valgus torques. METHODS: Ten intact porcine knees were settled to a 6-degree of freedom robotic system, while the force and 3-dimensional path of the knees were recorded via Universal Force Sensor (UFS) during 3 cycles of 250-N axial load and 5-Nm valgus torque at 15°, 30°, 45°, and 60° of knee flexion...
December 23, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28003668/concurrent-lateral-meniscal-repair-with-anterior-cruciate-ligament-reconstruction-induces-the-extrusion-of-the-lateral-meniscus-assessments-of-magnetic-resonance-images
#8
Naoko Kashihara, Takayuki Furumatsu, Yuya Kodama, Takaaki Tanaka, Toshifumi Ozaki
Concurrent meniscal repair with anterior cruciate ligament (ACL) reconstruction has shown good clinical outcomes, but it has a considerable risk of progressing to post-traumatic osteoarthritis of the knee. Here we investigated postoperative changes in the position of the lateral meniscus (LM) and assessed the short-term clinical results after concurrent LM repair with ACL reconstruction. Twentyseven patients underwent LM repair of a peripheral longitudinal tear concomitant with ACL reconstruction. We evaluated the preoperative and postoperative values of the Lysholm score and anteroposterior instability...
December 2016: Acta Medica Okayama
https://www.readbyqxmd.com/read/28002906/tears-of-popliteomeniscal-fascicles-diagnostic-and-clinical-implications-a-review-of-the-evidence
#9
R Papalia, R Simonetta, G Di Vico, G Torre, L Saccone, J Espregueira-Mendes, V Denaro
Postero-lateral corner of the knee is composed of several structures including the popliteo-meniscal fascicles (PMFs). These fibrous structures form a stable ligamentous complex around the popliteus tendon, which stabilize the lateral meniscus, increasing the strength of postero-lateral corner. Studies were retrieved through an electronic search of CINAHL, EMBASE, and Pub-Med, until May 2016. Studies in English, Italian, French, and Spanish were considered for inclusion. Randomized controlled trials, prospective and retrospective comparative studies, case series, and case reports were included...
October 2016: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28002905/arthroscopic-all-inside-treatment-of-popliteomeniscal-fascicles-tears-surgical-technique-and-results-from-the-first-6-consecutive-patients
#10
R Simonetta, G Di Vico, R Papalia, S Vasta, V Denaro
Athletes whose knees are subjected to sudden changes of direction and high jumps such as martial arts athletes, dancers, wrestlers and football players are at higher risk of injuring popliteomeniscal fascicles. Painful squatting and mechanical symptoms such as locking sensation are common. Current available treatments includes open or arthroscopic in repair. Arthroscopic repair with all-inside device can relieve symptoms and restore knee function. Six patients from two surgical centers with isolated popliteomeniscal fascicles tears were treated with arthroscopic all-inside repair...
October 2016: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/27993462/complex-medial-meniscus-tears-are-associated-with-a-biconcave-medial-tibial-plateau
#11
F Alan Barber, Mark H Getelman, Kathy L Berry
PURPOSE: To determine whether an association exists between a biconcave medial tibial plateau and complex medial meniscus tears. METHODS: A consecutive series of stable knees undergoing arthroscopy were evaluated retrospectively with the use of preoperative magnetic resonance imaging (MRI), radiographs, and arthroscopy documented by intraoperative videos. Investigators independently performed blinded reviews of the MRI or videos. Based on the arthroscopy findings, medial tibial plateaus were classified as either biconcave or not biconcave...
December 16, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27956232/changes-in-contact-area-in-meniscus-horizontal-cleavage-tears-subjected-to-repair-and-resection
#12
Brandon S Beamer, Kempland C Walley, Stephen Okajima, Ohan S Manoukian, Miguel Perez-Viloria, Joseph P DeAngelis, Arun J Ramappa, Ara Nazarian
PURPOSE: To assess the changes in tibiofemoral contact pressure and contact area in human knees with a horizontal cleavage tear before and after treatment. METHODS: Ten human cadaveric knees were tested. Pressure sensors were placed under the medial meniscus and the knees were loaded at twice the body weight for 20 cycles at 0°, 10°, and 20° of flexion. Contact area and pressure were recorded for the intact meniscus, the meniscus with a horizontal cleavage tear, after meniscal repair, after partial meniscectomy (single leaflet), and after subtotal meniscectomy (double leaflet)...
December 9, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27940573/knee-osteoarthritis-is-associated-with-previous-meniscus-and-anterior-cruciate-ligament-surgery-among-elite-college-american-football-athletes
#13
Matthew V Smith, Jeffrey J Nepple, Rick W Wright, Matthew J Matava, Robert H Brophy
BACKGROUND: Football puts athletes at risk for knee injuries such meniscus and anterior cruciate ligament (ACL) tears, which are associated with the development of osteoarthritis (OA). Previous knee surgery, player position, and body mass index (BMI) may be associated with knee OA. HYPOTHESIS: In elite football players undergoing knee magnetic resonance imaging at the National Football League's Invitational Combine, the prevalence of knee OA is associated with previous knee surgery and BMI...
December 9, 2016: Sports Health
https://www.readbyqxmd.com/read/27939623/factors-associated-with-meniscal-body-extrusion-on-knee-mri-in-overweight-and-obese-women
#14
F Zhang, S M Bierma-Zeinstra, E H G Oei, A Turkiewicz, M Englund, J Runhaar
OBJECTIVE: To determine factors associated with higher degree of meniscal body extrusion in overweight and obese women at high risk of knee osteoarthritis (OA). DESIGN: We used baseline data of the PRevention of knee Osteoarthritis in Overweight Females (PROOF) study, Netherlands, comprising overweight or obese women aged 50-60 years, free of clinical knee OA. All subjects completed a questionnaire on knee complaints and physical activity, underwent physical examination, radiography, and 1...
December 7, 2016: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/27919916/posterior-meniscal-root-repairs-outcomes-of-an-anatomic-transtibial-pull-out-technique
#15
Robert F LaPrade, Lauren M Matheny, Samuel G Moulton, Evan W James, Chase S Dean
BACKGROUND: Outcomes after transtibial pull-out repair for posterior meniscal root tears remain underreported, and factors that may affect outcomes are unknown. PURPOSE/HYPOTHESIS: The purpose of this study was to compare patient-centered outcomes after transtibial pull-out repair for posterior root tears in patients <50 and ≥50 years of age. We hypothesized that improvement in function and activity level at minimum 2-year follow-up would be similar among patients <50 years of age compared with patients ≥50 years and among patients undergoing medial versus lateral root repairs...
December 5, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27911285/the-relation-between-chondromalacia-patella-and-meniscal-tear-and-the-sulcus-angle-trochlear-depth-ratio-as-a-powerful-predictor
#16
Hatice Resorlu, Coskun Zateri, Gurdal Nusran, Ferdi Goksel, Nilufer Aylanc
PURPOSE: To investigate the relation between chondromalacia patella and the sulcus angle/trochlear depth ratio as a marker of trochlear morphology. In addition, we also planned to show the relationship between meniscus damage, subcutaneous adipose tissue thickness as a marker of obesity, patellar tilt angle and chondromalacia patella. METHODS: Patients with trauma, rheumatologic disease, a history of knee surgery and patellar variations such as patella alba and patella baja were excluded...
November 25, 2016: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/27887880/anamnestic-prediction-of-bucket-handle-compared-to-other-tear-patterns-of-the-medial-meniscus-in-stable-knees
#17
Barak Haviv, Shlomo Bronak, Yona Kosashvili, Rafael Thein
OBJECTIVE: The aim of this study was to analyze and compare the preoperative anamnestic details between patients with an arthroscopic diagnosis of bucket handle and other tear patterns of the medial meniscus in stable knees. METHODS: A total of 204 patients (mean age 49.3 ± 13 years) were included in the study. The mean age was 49.3 ± 13 years. The study group included 65 patients (63 males, 2 females) with an arthroscopic diagnosis of bucket handle tear and the control group included 139 patients (90 males, 49 females) with non-bucket handle tear patterns...
November 23, 2016: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/27885289/assessment-of-knee-joint-injuries-with-low-field-strength-magnetic-resonance-imaging
#18
O B Panta, N P Neupane, S Songmen, G Gurung
BACKGROUND: Magnetic Resonance Imaging is an appropriate screening tool before therapeutic arthroscopy, making diagnostic arthroscopy unnecessary in most patients. This study aims to evaluate the MRI findings in knee injuries and diagnostic value of low Strength MRI for assessing Meniscal and cruciate ligament tear. METHODS: A cross sectional study was conducted on patients undergoing "Magnetic Resonance Imaging of the Knee" for injuries of the knee and excluded patients undergoing MRI for other causes, poor diagnostic quality MRI and post operative MRI...
May 2016: Journal of Nepal Health Research Council
https://www.readbyqxmd.com/read/27824675/-fat-brook-in-the-popliteal-fossa-cadaveric-and-clinical-investigation-with-magnetic-resonance-imaging
#19
Yoonah Song, Seunghun Lee, Doo-Jin Paik, Jiyoon Bae
OBJECTIVE: This study aimed to describe the "fat brook" (FB) in the popliteal fossa of a cadaver and to evaluate its clinical significance. METHODS: Ten fresh cadaveric knees underwent magnetic resonance imaging and histologic analyses. In addition, magnetic resonance imaging images from 321 patients (108 men, 213 women; mean age, 49.8 years; age range, 5-92 years) were retrospectively reviewed. Two radiologists independently determined the presence/absence of the FB and internal derangement of the knee...
November 7, 2016: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27824492/evolution-of-intrameniscal-signal-intensity-alterations-detected-on-mri-over-24-months-in-patients-with-traumatic-anterior-cruciate-ligament-tear
#20
Julio Brandao Guimaraes, Luca Facchetti, Benedikt J Schwaiger, Alexandra S Gersing, Sharmila Majumdar, Benjamin C Ma, Xiaojuan Li, Thomas M Link
OBJECTIVE: The objective of our study was to assess the prevalence and evolution of intrameniscal signal-intensity alteration in subjects with an anterior cruciate ligament (ACL) tear over 24 months and compare clinical outcome and changes of cartilage between subjects with and those without this meniscal abnormality. MATERIALS AND METHODS: Fifty-seven subjects with an ACL tear were screened for intrameniscal signal-intensity alteration. Morphologic and compositional MRI was performed before ACL reconstruction and 12 and 24 months after ACL reconstruction...
November 8, 2016: AJR. American Journal of Roentgenology
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