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Knee meniscus

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https://www.readbyqxmd.com/read/28102713/factors-associated-with-the-status-of-meniscal-tears-following-meniscal-repair-concomitant-with-anterior-cruciate-ligament-reconstruction
#1
Takehiko Matsushita, Kanto Nagai, Daisuke Araki, Toshikazu Tanaka, Tomoyuki Matsumoto, Kotaro Nishida, Masahiro Kurosaka, Ryosuke Kuroda
Purpose Anterior cruciate ligament (ACL) injuries are often accompanied by meniscal tears. Meniscal repair is typically performed during ACL reconstruction. However, retear of the meniscus after repair is frequent. The purpose of this study was to analyze the factors associated with meniscal healing after meniscal repair concomitant with ACL reconstruction. Materials and Methods Eighty-seven meniscal repairs in 87 patients who received meniscal repair combined with ACL reconstruction and received second-look arthroscopy at a mean of postoperatively 15...
January 19, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/28097689/investigating-magnetic-susceptibility-of-human-knee-joint-at-7-tesla
#2
Hongjiang Wei, Russell Dibb, Kyle Decker, Nian Wang, Yuyao Zhang, Xiaopeng Zong, Weili Lin, Daniel B Nissman, Chunlei Liu
PURPOSE: To evaluate the magnetic susceptibility properties of different anatomical structures within the knee joint using quantitative susceptibility mapping (QSM). METHODS: A collagen tissue model was simulated and ex vivo animal cartilage experiments were conducted at 9.4 Tesla (T) to evaluate the B0 orientation-dependent magnetic susceptibility contrast observed in cartilage. Furthermore, nine volunteers (six healthy subjects without knee pain history and three patients with known knee injury, between 29 and 58 years old) were scanned using gradient-echo acquisitions on a high-field 7T MR scanner...
January 17, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28093371/sonographically-guided-knee-meniscus-injections-feasibility-techniques-and-validation
#3
Michael R Baria, Jacob L Sellon, Dan Lueders, Jay Smith
BACKGROUND: There is a growing interest in the use of biologic agents such as platelet-rich plasma and mesenchymal stem/stromal cells to treat musculoskeletal injuries, including meniscal tears. Although prior research has documented the role of diagnostic ultrasound to evaluate meniscal tears, sonographically guided (SG) techniques to specifically deliver therapeutic agents into the meniscus have not been described. OBJECTIVE: To describe and validate SG injection techniques for the body and posterior horn of the medial and lateral meniscus...
January 13, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
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
#4
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
#5
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
#6
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/28070864/factors-that-affect-the-content-of-cadmium-nickel-copper-and-zinc-in-tissues-of-the-knee-joint
#7
Wojciech Roczniak, Barbara Brodziak-Dopierała, Elżbieta Cipora, Agata Jakóbik-Kolon, Joanna Kluczka, Magdalena Babuśka-Roczniak
Osteoarthritis causes the degradation of the articular cartilage and periarticular bones. Trace elements influence the growth, development and condition of the bone tissue. Changes to the mineral composition of the bone tissue can cause degenerative changes and fractures. The aim of the research was to determine the content of cadmium (Cd), nickel (Ni), copper (Cu) and zinc (Zn) in the tibia, the femur and the meniscus in men and women who underwent a knee replacement surgery. Samples were collected from 50 patients, including 36 women and 14 men...
January 9, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28065381/the-contribution-of-3d-quantitative-meniscal-and-cartilage-measures-to-variation-in-normal-radiographic-joint-space-width-data-from-the-osteoarthritis-initiative-healthy-reference-cohort
#8
Melanie Roth, Wolfgang Wirth, Katja Emmanuel, Adam G Culvenor, Felix Eckstein
OBJECTIVE: To explore to what extent three-dimensional measures of the meniscus and femorotibial cartilage explain the variation in medial and lateral femorotibial radiographic joint space width (JSW), in healthy men and women. METHODS: The right knees of 87 Osteoarthritis Initiative healthy reference participants (no symptoms, radiographic signs or risk factors of osteoarthritis; 37 men, 50 women; age 55.0±7.6; BMI 24.4±3.1) were assessed. Quantitative measures of subregional femorotibial cartilage thickness and meniscal position and morphology were computed from segmented magnetic resonance images...
February 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28060534/is-it-necessary-to-repair-stable-ramp-lesions-of-the-medial-meniscus-during-anterior-cruciate-ligament-reconstruction
#9
Xin Liu, Hui Zhang, Hua Feng, Lei Hong, Xue-Song Wang, Guan-Yang Song
BACKGROUND: A special type of meniscal lesion involving the peripheral attachment of the posterior horn of the medial meniscus (PHMM), termed a "ramp lesion," is commonly associated with an anterior cruciate ligament (ACL) injury. However, its treatment is still controversial. Recently, stable ramp lesions treated with abrasion and trephination alone have been shown to have good clinical outcomes after ACL reconstruction. HYPOTHESIS: Stable ramp lesions treated with abrasion and trephination alone during ACL reconstruction will result in similar clinical outcomes compared with those treated with surgical repair...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28057326/meniscus-morphology-does-tear-type-matter-a-narrative-review-with-focus-on-relevance-for-osteoarthritis-research
#10
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/28056527/osteochondral-allograft-transplantation-of-the-knee
#11
Rachel M Frank, Simon Lee, David Levy, Sarah Poland, Maggie Smith, Nina Scalise, Gregory L Cvetanovich, Brian J Cole
BACKGROUND: Osteochondral allograft transplantation (OAT) is being performed with increasing frequency, and the need for reoperations is not uncommon. PURPOSE: To quantify survival for OAT and report findings at reoperations. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: A review of prospectively collected data of 224 consecutive patients who underwent OAT by a single surgeon with a minimum follow-up of 2 years was conducted...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28051883/hydrogels-for-precision-meniscus-tissue-engineering-a-comprehensive-review
#12
Ana Rey-Rico, Magali Cucchiarini, Henning Madry
The meniscus plays a pivotal role to preserve the knee joint homeostasis. Lesions to the meniscus are frequent, have a reduced ability to heal, and may induce tibiofemoral osteoarthritis. Current reconstructive therapeutic options mainly focus on the treatment of lesions in the peripheral vascularized region. In contrast, few approaches are capable of stimulating repair of damaged meniscal tissue in the central, avascular portion. Tissue engineering approaches are of high interest to repair or replace damaged meniscus tissue in this area...
January 4, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/28038475/readability-of-online-sources-regarding-meniscal-tears
#13
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/28034603/useful-ultrasonographic-evaluation-of-the-medial-meniscus-as-a-feature-predicting-the-onset-of-radiographic-knee-osteoarthritis
#14
Taiki Murakami, Makoto Enokida, Kei Kawaguchi, Ryoji Otsuki, Hideki Nagashima
OBJECTIVE: Medial radial displacement (MRD) of the medial meniscus is a feature proving a dysfunction in the medial meniscus in osteoarthritis (OA) of the knee. MRD was measured in radiographic pre-OA knee and early osteoarthritis of the knee (early-OA) longitudinally using ultrasound (US) to investigate the characteristics involved in the onset and progression of OA. METHODS: Fifty-five patients with pain on the medial side of the knee participated in the present study...
December 27, 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28018086/leukocyte-poor-platelet-rich-plasma-to-treat-degenerative-meniscal-tear-a-case-report
#15
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
#16
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/28005443/identification-and-characterization-of-adult-mouse-meniscus-stem-progenitor-cells
#17
Laura W Gamer, Rui Rui Shi, Ashira Gendelman, Dylan Mathewson, Jackson Gamer, Vicki Rosen
Meniscal damage is a common problem that accelerates the onset of knee osteoarthritis. Stem cell based tissue engineering treatment approaches have shown promise in preserving meniscal tissue and restoring meniscal function. The purpose of our study was to identify meniscus-derived stem/progenitor cells (MSPCs) from mouse, a model system that allows for in vivo analysis of the mechanisms underlying meniscal injury and healing. MSPCs were isolated from murine menisci grown in explant culture and characterized for stem cell properties...
December 22, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/28005131/strain-dependent-glucose-partitioning-in-meniscus-fibrocartilage
#18
Kelsey L Kleinhans, Alicia Jackson
A nearly avascular tissue, the knee meniscus relies on diffusive transport for nutritional supply to cells. Nutrient transport depends on solute partitioning in the tissue, which governs the amount of nutrients that can enter a tissue. The purpose of the present study was to investigate the effects of mechanical strain, tissue region, and tissue composition on the partition coefficient of glucose in meniscus fibrocartilage. A simple partitioning experiment was employed to measure glucose partitioning in porcine meniscus tissues from two regions (horn and central), from both meniscal components (medial and lateral), and at three levels of compression (0%, 10%, and 20%)...
December 22, 2016: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28005104/potential-operating-room-fire-hazard-of-bone-cement
#19
Udai S Sibia, Kevin Connors, Sarah Dyckman, Hamid R Zahiri, Ivan George, Adrian E Park, James H MacDonald
Approximately 600 cases of operating room (OR) fires are reported annually. Despite extensive fire safety education and training, complete elimination of OR fires still has not been achieved. Each fire requires an ignition source, a fuel source, and an oxidizer. In this case report, we describe the potential fire hazard of bone cement in the OR. A total knee arthroplasty was performed with a standard medial parapatellar arthrotomy. Tourniquet control was used. After bone cement was applied to the prepared tibial surface, the surgeon used an electrocautery device to resect residual lateral meniscus tissue-and started a fire in the operative field...
November 2016: American Journal of Orthopedics
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
#20
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
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