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https://www.readbyqxmd.com/read/25814179/predicted-loading-on-the-menisci-during-gait-the-effect-of-horn-laxity
#1
Trent M Guess, Swithin Razu, Hamidreza Jahandar, Antonis Stylianou
Radiographic measurements have established a link between meniscus extrusion and meniscus degeneration as well as with knee osteoarthritis. The presented work combines medical imaging with motion capture data from two healthy female subjects to create subject specific knee models that predict tibio-menisco-femoral contact forces and ligament forces during muscle driven simulations of barefoot gait. The developed computational models were used to explore the relationship between the extent of meniscal extrusion and biomechanical function by altering the laxity of the meniscal horn attachments during gait...
June 1, 2015: Journal of Biomechanics
https://www.readbyqxmd.com/read/25603971/acute-and-chronic-menisco-capsular-separation-in-the-young-athlete-diagnosis-treatment-and-results-in-thirty-seven-consecutive-patients
#2
Lena Hirtler, Julia Unger, Patrick Weninger
PURPOSE: Menisco-capsular separation (MCS) is an avulsion type of injury of the medial and/or lateral meniscus and is defined as detachment of the meniscus from its capsular attachment. The aims of this study were to show the results of arthroscopic all-inside menisco-capsular repair in a large number of consecutive patients with acute or chronic MCS, emphasise the advantages of this safe treatment option and stress the superiority of the treatment on the basis of thorough physical examination of the knee joint over magnetic resonance imaging (MRI) diagnosis in MCS...
May 2015: International Orthopaedics
https://www.readbyqxmd.com/read/25213032/arthroscopy-of-the-normal-cadaveric-ovine-femorotibial-joint-a-systematic-approach-to-the-cranial-and-caudal-compartments
#3
R B Modesto, K A Mansmann, T P Schaer
OBJECTIVES: Preclinical studies using large animal models play an intergral part in translational research. For this study, our objectives were: to develop and validate arthroscopic approaches to four compartments of the stifle joint as determined via the gross and arthroscopic anatomy of the cranial and caudal aspects of the joint. METHODS: Cadaveric hindlimbs (n = 39) were harvested from mature ewes. The anatomy was examined by tissue dissection (n = 6), transverse sections (n = 4), and computed tomography (n = 4)...
2014: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/24638128/establishment-of-a-surgically-induced-model-in-mice-to-investigate-the-protective-role-of-progranulin-in-osteoarthritis
#4
Yunpeng Zhao, Ben Liu, Chuan-ju Liu
Destabilization of medial meniscus (DMM) model is an important tool for studying the pathophysiological roles of numerous arthritis associated molecules in the pathogenesis of osteoarthritis (OA) in vivo. However, the detailed, especially the visualized protocol for establishing this complicated model in mice, is not available. Herein we took advantage of wildtype and progranulin (PGRN)-/- mice as examples to introduce a protocol for inducing DMM model in mice, and compared the onset of OA following establishment of this surgically induced model...
2014: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/24327229/-early-surgery-for-menisco-ligamental-injuries-in-elite-athletes
#5
REVIEW
J Schneider
For elite athletes with anterior cruciate ligament (ACL) rupture, surgical management in the acute phase has become widespread practice. After performing a selective review of the literature using PubMed, these results were compared with our own experience. Surgery including concomitant injuries should be performed within the first 48 h. The principal advantage for athletes is the possibility of an earlier return to training and competition. The acute treatment of concomitant injuries may also improve outcome...
January 2014: Der Unfallchirurg
https://www.readbyqxmd.com/read/22470411/simulation-of-anterior-cruciate-ligament-deficiency-in-a-musculoskeletal-model-with-anatomical-knees
#6
Trent M Guess, Antonis Stylianou
Abnormal knee kinematics and meniscus injury resulting from anterior cruciate ligament (ACL) deficiency are often implicated in joint degeneration even though changes in tibio-femoral contact location after injury are small, typically only a few millimeters. Ligament reconstruction surgery does not significantly reduce the incidence of early onset osteoarthritis. Increased knowledge of knee contact mechanics would increase our understanding of the effects of ACL injury and help guide ACL reconstruction methods...
2012: Open Biomedical Engineering Journal
https://www.readbyqxmd.com/read/22167203/congenital-absence-of-the-cruciate-ligaments
#7
Massimo Berruto, Luca Gala, Eva Usellini, Dario Duci, Bruno Marelli
Congenital absence of the cruciate ligaments is a rare condition with a prevalence of 0.017 per 1,000 live births. The most important finding of this study was the presence of a posterior menisco-femoral ligament of Wrisberg with cruciate ligaments agenesia and the hypothesis advanced about the development of the ligamentous structures of the knee. Reviewing the literature, we assume that the congenital anomaly that causes the anatomical defect expresses itself around the 7th to 8th post-ovulatory week. Literature teaches us that the need for a knee replacement seems to be inevitable before or after and during the life of a patient without cruciate ligaments...
August 2012: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/21531413/operative-strategy-in-postero-medial-fracture-dislocation-of-the-proximal-tibia
#8
Primoz Potocnik, Yves P Acklin, Christoph Sommer
OBJECTIVE: In 1981, Moore introduced a new classification for dislocation-type fractures caused by high-energy mechanisms. The most common medial Moore-type fractures are entire condyle fractures with the avulsion of the median eminence (tibial anterior cruciate ligament (ACL) insertion). They are usually associated with a posterolateral depression of the tibial plateau and an injury of the lateral menisco-tibial capsule. This uniform injury of the knee is increasingly observed in the recent years after skiing injuries due to the high-speed carving technique...
October 2011: Injury
https://www.readbyqxmd.com/read/20644938/magnetic-resonance-diagnosis-of-posterior-horn-tears-of-the-lateral-meniscus-using-a-thin-axial-plane-the-zip-sign-a-preliminary-study
#9
P Y Savoye, J N Ravey, C Dubois, L Pittet Barbier, A Courvoisier, D Saragaglia, G Ferretti
OBJECTIVE: The "zip" sign is a newly described form of meniscal tear progressing from the distal insertion of menisco-femoral ligaments (MFLs) through the lateral meniscal wall; the tear occurs during anterior cruciate ligament (ACL) rupture. The purpose of this study was to evaluate the zip sign on knee MRI within the context of ACL injuries. METHODS: From a series of 261 MR examinations for acute knee injury, we selected 97 patients with both MR and arthroscopic data for a retrospective blinded review...
January 2011: European Radiology
https://www.readbyqxmd.com/read/20459494/effect-of-transection-of-the-caudal-menisco-tibial-ligament-on-medial-femorotibial-contact-mechanics
#10
Antonio Pozzi, Stanley E Kim, Daniel D Lewis
OBJECTIVE: To evaluate the effect of transection of the medial caudal menisco-tibial ligament on contact mechanics in a canine cadaveric model of cranial cruciate ligament (CCL) rupture and tibial plateau leveling osteotomy (TPLO). STUDY DESIGN: Ex vivo biomechanical study. SAMPLE POPULATION: Unpaired pelvic limbs (n=8) from 28-35 kg dogs. METHODS: Cadaveric pelvic limbs with CCL-deficient stifles stabilized with TPLO were axially loaded using a material testing machine with 30% body weight and a stifle angle of 135 degrees...
June 2010: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/20359933/a-subject-specific-multibody-model-of-the-knee-with-menisci
#11
Trent M Guess, Ganesh Thiagarajan, Mohammad Kia, Meenakshi Mishra
The menisci of the knee play an important role in joint function and our understanding of knee mechanics and tissue interactions can be enhanced through computational models of the tibio-menisco-femoral structure. Several finite element models of the knee that include meniscus-cartilage contact exist, but these models are typically limited to simplified boundary conditions. Movement simulation and musculoskeletal modeling can predict muscle forces, but are typically performed using the multibody method with simplified representation of joint structures...
June 2010: Medical Engineering & Physics
https://www.readbyqxmd.com/read/19824595/giant-medial-parameniscal-cyst-in-an-osteoarthritic-knee
#12
Edmund H Choi, James Huang, Diana Bryk, Eli Bryk
Medial parameniscal cysts of the knee are typically 0.3 to 9 mm in diameter. Few cases of unusually large medial parameniscal cysts have been reported. We describe the treatment of a patient with osteoarthritis of the knee who presented with an extraordinarily large, ipsilateral, medial parameniscal cyst, 10 cm in diameter. We believe this to be the largest medial parameniscal cyst reported in the English literature. Based on the patient's severe tricompartmental arthritis and associated symptoms, total knee arthroplasty (TKA) was indicated with simultaneous excision of the parameniscal cyst...
October 2009: Orthopedics
https://www.readbyqxmd.com/read/19432369/-oblique-menisco-meniscal-ligament-of-the-knee
#13
Luis Manuel Alanís Blancas, Paola M Zamora Muñoz, Angel Cruz Miranda
INTRODUCTION: The presence of anatomic variants in the knee may confuse the unwary orthopedic surgeon and alter diagnosis and consequently treatment and results in knee arthroscopy. CASE REPORT: We present a 35-years-old male that underwent arthroscopic ACL reconstruction, and an anatomic variable was discovered, previously reported as oblique menisco-meniscal ligament. No procedure was performed to this variant in order to preserve the normal articular biomechanics prior the accident that cause the ACL rupture...
March 2009: Acta Ortopédica Mexicana
https://www.readbyqxmd.com/read/18418505/a-new-look-at-lubrication-of-the-ocular-surface-fluid-mechanics-behind-the-blinking-eyelids
#14
REVIEW
Ivan Cher
The concept of the dacruon was presented by the author in this journal in July 2007. Dacruon, defined as "the body of unshed fluid, constantly occupying the ocular surface sac [OSS], comprising the mucoaqueous pool [MAP] and its covering lipid sealant," prompts a fresh consideration of OSS lubrication. The author notes scientific agreement that in the preocular, interpalpebral OSS (the menisco-optical domain), the mucous gel of the MAP adheres to subjacent bulbar epithelium. In the retropalpebral recesses (the "lubrication domain"), lid and globe epithelia are juxtaposed...
April 2008: Ocular Surface
https://www.readbyqxmd.com/read/18394074/canine-stifle-positive-contrast-computed-tomography-arthrography-for-assessment-of-caudal-horn-meniscal-injury-a-cadaver-study
#15
Michael S Tivers, Paul Mahoney, Sandra A Corr
OBJECTIVE: To investigate the use of computed tomography (CT) arthrography in cadaveric canine stifles with particular emphasis on the diagnosis of meniscal injury. STUDY DESIGN: Prospective cadaver study. SAMPLE POPULATION: Pelvic limbs from adult Beagles (n=10). METHODS: After survey CT scan of each stifle oriented in the dorsal plane, positive contrast stifle CT arthrogram (CTA) was performed using the same slice orientation...
April 2008: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/18183628/magnetic-resonance-image-analysis-of-meniscal-translation-and-tibio-menisco-femoral-contact-in-deep-knee-flexion
#16
Jiang Yao, Sarah L Lancianese, Kristen R Hovinga, Jordan Lee, Amy L Lerner
The purpose of this study was to clarify meniscal displacement and cartilage-meniscus contact behavior in a full extension position and a deep knee flexion position. We also studied whether the meniscal translation pattern correlated with the tibiofemoral cartilage contact kinematics. Magnetic resonance (MR) images were acquired at both positions for 10 subjects using a conventional MR scanner. Subjects achieved a flexion angle averaging 139 degrees +/- 3 degrees. Both medial and lateral menisci translated posteriorly on the tibial plateau during deep knee flexion...
May 2008: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/17950743/sensitivity-of-tibio-menisco-femoral-joint-contact-behavior-to-variations-in-knee-kinematics
#17
Jiang Yao, Arthur D Salo, Jordan Lee, Amy L Lerner
Use of computational models with kinematic boundary conditions to study the knee joint contact behavior for normal and pathologic knee joints depends on an understanding of the impacts of kinematic uncertainty. We studied the sensitivities of tibio-menisco-femoral joint contact behavior to variations in knee kinematics using a finite element model (FEM) with geometry and kinematic boundary conditions derived from sequences of magnetic resonance (MR) images. The MR images were taken before and after axial compression was applied to the knee joint of a healthy subject...
2008: Journal of Biomechanics
https://www.readbyqxmd.com/read/17207643/osteoarthritis-severity-is-sex-dependent-in-a-surgical-mouse-model
#18
H-L Ma, T J Blanchet, D Peluso, B Hopkins, E A Morris, S S Glasson
OBJECTIVE: To investigate the role of sex hormones in cartilage degradation and progression of osteoarthritis (OA) in a murine model induced by destabilization of the medial meniscus (DMM). DESIGN: Accelerated OA development in mice was induced by transection of the menisco-tibial ligament, which anchors the medial meniscus to the tibial plateau. Intact male and female, and orchiectomized (ORX) male and ovariectomized (OVX) female mouse knee histology were compared for signs of OA following DMM...
June 2007: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/15837397/imaging-evaluation-of-the-postoperative-knee-ligaments
#19
REVIEW
Hakan Ilaslan, Murali Sundaram, Anthony Miniaci
Until the advent of magnetic resonance imaging (MRI), evaluation of ligament reconstruction of the knee was largely based on clinical examination and radiographs. MRI is the modality of choice for noninvasive evaluation of reconstructed ligaments, menisco-capsular structures and soft tissues. This article reviews the surgical techniques, normal and abnormal appearances of the ACL and PCL grafts and common complications following ligament reconstruction.
May 2005: European Journal of Radiology
https://www.readbyqxmd.com/read/15013085/femoro-tibial-and-menisco-tibial-translation-patterns-in-patients-with-unilateral-anterior-cruciate-ligament-deficiency-a-potential-cause-of-secondary-meniscal-tears
#20
R von Eisenhart-Rothe, C Bringmann, M Siebert, M Reiser, K-H Englmeier, F Eckstein, H Graichen
OBJECTIVE: To analyze menisco-tibial and femoro-tibial translation patterns in healthy and ACL-deficient knees in different knee flexion angles under muscle activity. METHODS: The ACL-deficient and contralateral healthy knees of 10 patients were examined with an open MRI system at 30 degrees and 90 degrees of knee flexion, under isometric contraction of the extensors or flexor muscle groups. Translations between the tibia, the femoral condyles and the menisci were analyzed by three-dimensional image postprocessing...
March 2004: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
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