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https://www.readbyqxmd.com/read/29352626/differences-between-sexes-in-the-standard-and-advanced-dimensioning-of-lateral-meniscal-allografts
#1
Patrycja Mickiewicz, Michał Walczak, Michał Łaszczyca, Damian Kusz, Zygmunt Wróbel
BACKGROUND: There are many different methods of meniscal allograft measurements, which depend on individual tissue bank procedures. Due to the lack of a standardised method of dimensioning, measurement results may vary between individual cases. Consequently, allograft may be mismatched to the patient's knee anatomy. The purpose of this study was to measure four meniscal dimensions - two standard and two specific - and then compare them between sexes. METHODS: Fourteen cadaveric lateral menisci (seven male and seven female) were scanned using a microtomography scanner...
January 15, 2018: Knee
https://www.readbyqxmd.com/read/29350634/mri-of-popliteo-meniscal-fasciculi-of-the-knee-a-pictorial-review
#2
Marcello Zappia, Alfonso Reginelli, Vito Chianca, Michela Carfora, Francesco Di Pietto, Germano Iannella, Pier Paolo Mariani, Mariano Di Salvatore, Silvia Bartollino, Nicola Maggialetti, Salvatore Cappabianca, Luca Brunese
The popliteomeniscal fascicules (PMFs) provide the attachment of the lateral meniscus to the popliteus musculotendinous region, forming the floor and the roof the popliteal hiatus. In the second half of 1900's, some anatomic studies claim the important function of the PMF as stabilizers of the lateral meniscus; these anatomical structures work in conjunction with the popliteus musculotendinous unit to prevent excessive lateral meniscal movement and possible meniscus subluxation. A correct diagnosis of the PMFs pathology is crucial to establish the suitable surgical treatment for each patient...
January 19, 2018: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/29349991/-effects-of-creating-a-tunnel-through-intercondylar-fossa-under-arthroscopy-for-the-treatment-of-complex-tears-at-the-medial-meniscus-posterior-horn
#3
Ling-Dai Dong, Chang-Jian Bing, Jian-Lin Li, Yue Cai
OBJECTIVE: To discuss the advantages of the arthroscopic treatment for complex tears of the medial meniscus posterior horn by creating a tunnel passageway through the intercondylar fossa. METHODS: All 127 patients including 24 males and 103 females with complex tears at the medial meniscus posterior horn were reviewed. The age of all patients ranged from 45 to 78 years old, with an average of 67 years old. All 127 patients were treated with partial meniscectomy, in which 112 patients were treated with partial meniscectomy smoothly with three incisions (anterior medial incision, anterior lateral incision, high anterior lateral incision), and 15 patients were treated with four incisions (anterior medial incision, anterior lateral incision, high anterior lateral incision, posterior medial incision)...
April 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29349986/-observation-of-curative-effects-of-musculoskeletal-ultrasound-guided-needle-knife-on-the-degenerative-meniscus-disease
#4
Zong-Ting Shi, Qing-Fu Wang, Dong Yu, Yi Zhang, Xiao-Xia Yang, Heng-Ping Liu, Qing-Feng Zhang
OBJECTIVE: To observe the curative effect of musculoskeletal ultrasound-guided needle-knife on the degenerative meniscus disease, and to provide a new method in the treatment of degenerative meniscus disease. METHODS: Seventy-seven patients with degenerative meniscus disease treated in the Third Affiliated Hospital of Beijing University of Chinese Medicine from January 2015 to September 2015 were selected, including 30 males and 47 females, aged from 44 to 66 years old, with an average of 57...
April 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29349977/-therapeutic-effects-of-internal-drainage-by-expanding-arthroscopic-gastrocnemius-semimembranosus-bursa-and-cyst-wall-resection-for-the-treatment-of-41-patients-with-popliteal-cysts
#5
Li-Chuang Wu, Hai-Bo Zhou, Chao Zhang, Lei Chen, Cai-Long Liu
OBJECTIVE: To investigate the clinical curative effects of internal drainage by expanding arthroscopic gastrocnemius-semimembranosus bursa(GSB) and cyst wall resection for the treatment of popliteal cysts. METHODS: A retrospective analysis of patients from May 2011 to December 2015. Arthroscopic treatment for 41 patients with popliteal fossa cysts, 18 males and 23 females, aged from 34 to 67 years old, averaged 42.6 years old. All the patients had preoperative magnetic resonance imagings to confirm the diagnosis and identify the valvular opening(Gastrocnemius-Semimembranosus bursa, GSB), as well as the associated intra-articular pathology...
April 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29349008/meniscal-allograft-transplantation-made-simple-bridge-and-slot-technique
#6
Daniel J Kaplan, Sergio A Glait, William E Ryan, Michael J Alaia, Kirk A Campbell, Eric J Strauss, Laith M Jazrawi
Over recent years, appreciation for the critical role of the meniscus in joint biomechanics has led to an emphasis on meniscal preservation. Meniscal allograft transplant (MAT) is a promising biological solution for the symptomatic young patient with a meniscus-deficient knee that has not developed advanced osteoarthritis. As surgical techniques are refined and outcomes continue to improve, it is vital to consider the utility of such procedures and offer a straightforward approach to MAT. This article and accompanying video provide a step-by-step tutorial on how to perform a MAT using the bridge and slot technique, its key pearls and pitfalls as well as the relevant advantages and disadvantages of MAT...
December 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29348998/meniscal-repair-with-fibrin-clot-augmentation
#7
Jorge Chahla, Nicholas I Kennedy, Andrew G Geeslin, Gilbert Moatshe, Mark E Cinque, Nicholas N DePhillipo, Robert F LaPrade
Meniscal injuries and meniscal loss are associated with changes in knee kinematics and loading, ultimately leading to poor functional outcomes and increased risk of progression to osteoarthritis. Biomechanical studies have shown restored knee function, and clinical studies have reported improved outcomes and decreased risk of osteoarthritis after meniscal repair. This has led orthopaedic surgeons to try and save the meniscus by repair whenever possible, as shown by increasing incidence of meniscal repair surgeries...
December 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29347234/pace-and-patterns-of-magnetic-swimmers-in-a-billiard-pool
#8
Florian J Maier, Markus Sesselmann, Ingo Rehberg, Reinhard Richter
We experimentally investigate magnetic surface swimmers on water. These objects self-assemble from ferromagnetic microparticles and a nonmagnetic disk. They are floating on the liquid surface due to interface tension and move under the influence of a harmonically oscillating homogeneous magnetic field oriented vertically, which is distinguished by its amplitude and frequency. The speed of the surface swimmers strongly depends on these parameters. The functional dependencies between speed and amplitude and between speed and frequency are investigated by independently varying both control parameters...
July 2017: Physical Review. E
https://www.readbyqxmd.com/read/29347224/spreading-law-of-non-newtonian-power-law-liquids-on-a-spherical-substrate-by-an-energy-balance-approach
#9
Masao Iwamatsu
The spreading of a cap-shaped spherical droplet of non-Newtonian power-law liquids, both shear-thickening and shear-thinning liquids, that completely wet a spherical substrate is theoretically investigated in the capillary-controlled spreading regime. The crater-shaped droplet model with the wedge-shaped meniscus near the three-phase contact line is used to calculate the viscous dissipation near the contact line. Then the energy balance approach is adopted to derive the equation that governs the evolution of the contact line...
July 2017: Physical Review. E
https://www.readbyqxmd.com/read/29343245/an-unusual-case-of-symptomatic-deep-vein-thrombosis-and-pulmonary-embolism-after-arthroscopic-meniscus-surgery
#10
Chao-Hua Fang, Hua Liu, Jun-Hui Zhang, Shi-Gui Yan
BACKGROUND: Although thrombosis complication is rare after arthroscopic meniscus surgery, deep vein thrombosis and pulmonary embolism can be fatal. The associated risk factors and whether anticoagulant prevention after arthroscopic knee surgery is necessary have not reach consensus. Here we present a case of deep vein thrombosis and pulmonary embolism after a common arthroscopic meniscectomy. CASE PRESENTATION: The patient had no risk factors except ipsilateral leg varicose veins...
January 17, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29341680/ultimate-stable-underwater-superhydrophobic-state
#11
Yaolei Xiang, Shenglin Huang, Pengyu Lv, Yahui Xue, Qiang Su, Huiling Duan
Underwater metastability hinders the durable application of superhydrophobic surfaces. In this work, through thermodynamic analysis, we theoretically demonstrate the existence of an ultimate stable state on underwater superhydrophobic surfaces. Such a state is achieved by the synergy of mechanical balance and chemical diffusion equilibrium across the entrapped liquid-air interfaces. By using confocal microscopy, we in situ examine the ultimate stable states on structured hydrophobic surfaces patterned with cylindrical micropores in different pressure and flow conditions...
September 29, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29340746/similar-clinical-outcomes-following-collagen-or-polyurethane-meniscal-scaffold-implantation-a-systematic-review
#12
REVIEW
Darby A Houck, Matthew J Kraeutler, John W Belk, Eric C McCarty, Jonathan T Bravman
PURPOSE: The purpose of this systematic review is to evaluate the current literature in an effort to assess specific clinical outcomes following meniscal scaffold implantation using the two available scaffolds: Collagen Meniscal Implant (CMI) and the Actifit polyurethane meniscal scaffold. METHODS: A systematic review was performed by searching PubMed, Embase, and Cochrane Library to find studies evaluating clinical outcomes of patients undergoing meniscal scaffold implantation...
January 16, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29340652/pain-sensitivity-associated-with-the-length-of-the-maximum-interblink-period
#13
Wing Li, Meng C Lin
Purpose: Pain sensitivity has been identified as a factor that affects how individuals answer dry eye questionnaires, but it is unknown how it affects ocular discomfort. This study used the time that individuals could refrain from blinking as an indicator of ocular discomfort and set out to determine whether it was related to pain sensitivity, while adjusting for ocular surface conditions. Methods: Subjects first completed the Pain Sensitivity Questionnaire to quantify pain sensitivity levels...
January 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29334180/nitric-oxide-dependent-degradation-of-polyethylene-glycol-modified-single-walled-carbon-nanotubes-implications-for-intra-articular-delivery
#14
Kunal Bhattacharya, Cristiano Sacchetti, Pedro M Costa, Jens Sommertune, Birgit D Brandner, Andrea Magrini, Nicola Rosato, Nunzio Bottini, Massimo Bottini, Bengt Fadeel
Polyethylene glycol (PEG)-modified carbon nanotubes have been successfully employed for intra-articular delivery in mice without systemic or local toxicity. However, the fate of the delivery system itself remains to be understood. In this study 2 kDa PEG-modified single-walled carbon nanotubes (PNTs) are synthesized, and trafficking and degradation following intra-articular injection into the knee-joint of healthy mice are studied. Using confocal Raman microspectroscopy, PNTs can be imaged in the knee-joint and are found to either egress from the synovial cavity or undergo biodegradation over a period of 3 weeks...
January 15, 2018: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29333332/next-generation-tissue-engineering-of-orthopedic-soft-tissue-to-bone-interfaces
#15
Alexander J Boys, Mary Clare McCorry, Scott Rodeo, Lawrence J Bonassar, Lara A Estroff
Soft tissue-to-bone interfaces are complex structures that consist of gradients of extracellular matrix materials, cell phenotypes, and biochemical signals. These interfaces, called entheses for ligaments, tendons, and the meniscus, are crucial to joint function, transferring mechanical loads and stabilizing orthopedic joints. When injuries occur to connected soft tissue, the enthesis must be re-established to restore function, but due to structural complexity, repair has proven challenging. Tissue engineering offers a promising solution for regenerating these tissues...
September 2017: MRS Communications
https://www.readbyqxmd.com/read/29333118/the-relationship-between-chondromalacia-patella-medial-meniscal-tear-and-medial-periarticular-bursitis-in-patients-with-osteoarthritis
#16
Mustafa Resorlu, Davut Doner, Ozan Karatag, Canan Akgun Toprak
Background: This study investigated the presence of bursitis in the medial compartment of the knee (pes anserine, semimembranosus-tibial collateral ligament, and medial collateral ligament bursa) in osteoarthritis, chondromalacia patella and medial meniscal tears. Patients and methods: Radiological findings of 100 patients undergoing magnetic resonance imaging with a preliminary diagnosis of knee pain were retrospectively evaluated by two radiologists. The first radiologist assessed all patients in terms of osteoarthritis, chondromalacia patella and medial meniscal tear...
December 2017: Radiology and Oncology
https://www.readbyqxmd.com/read/29330740/3d-reconstruction-of-dynamic-liquid-film-shape-by-optical-grid-deflection-method
#17
L Fourgeaud, E Ercolani, J Duplat, P Gully, V S Nikolayev
In this paper, we describe the optical grid deflection method used to reconstruct the 3D profile of liquid films deposited by a receding liquid meniscus. This technique uses the refractive properties of the film surface and is suitable for liquid thickness from several microns to millimeter. This method works well for strong interface slopes and changing in time film shape; it applies when the substrate and fluid media are transparent. The refraction is assumed to be locally unidirectional. The method is particularly appropriate to follow the evolution of parameters such as dynamic contact angle, triple liquid-gas-solid contact line velocity or dewetting ridge thickness...
January 15, 2018: European Physical Journal. E, Soft Matter
https://www.readbyqxmd.com/read/29329496/positive-feedback-regulation-of-subchondral-h-type-vessel-formation-by-chondrocyte-promotes-osteoarthritis-development-in-mice
#18
Jiansen Lu, Haiyan Zhang, Daozhang Cai, Chun Zeng, Pinglin Lai, Yan Shao, Hang Fang, Delong Li, Jiayao Ouyang, Chang Zhao, Denghui Xie, Bin Huang, Jian Yang, Yu Jiang, Xiaochun Bai
Vascular-invasion-mediated interactions between activated articular chondrocytes and subchondral bone are essential for osteoarthritis (OA) development. Here, we determined the role of nutrient sensing mechanistic target of rapamycin complex 1 (mTORC1) signaling in the crosstalk across the bone cartilage interface and its regulatory mechanisms. Then mice with chondrocyte-specific mTORC1 activation (Tsc1 CKO and Tsc1 CKOER ) or inhibition (Raptor CKOER ) and their littermate controls were subjected to OA induced by destabilization of the medial meniscus (DMM) or not...
January 12, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29329471/diagnosing-meniscal-pathology-and-understanding-how-to-evaluate-a-postoperative-meniscus-based-on-the-operative-procedure
#19
Monica Tafur, Linda Probyn, Jaskarndip Chahal, Lawrence M White
Magnetic resonance imaging (MRI) represents the preferred noninvasive imaging technique to diagnose meniscal pathology in the pre- and postoperative setting. Furthermore, characterization of meniscal tissue MR properties has been possible by the development of advanced MRI techniques. Suspected meniscal tears are a frequent indication for MRI and the International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine (ISAKOS) classification system has been developed to facilitate accurate and uniform reporting of such meniscal tears...
January 12, 2018: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29323710/blocking-pi3k-akt-signaling-inhibits-bone-sclerosis-in-subchondral-bone-and-attenuates-post-traumatic-osteoarthritis
#20
Chuangxin Lin, Yan Shao, Chun Zeng, Chang Zhao, Hang Fang, Liping Wang, Jianying Pan, Liangliang Liu, Weizhong Qi, Xiaofeng Feng, Hong Qiu, Haiyang Zhang, Yuhui Chen, Hong Wang, Daozhang Cai, Cory J Xian
PI3K/AKT signaling is essential in regulating pathophysiology of osteoarthritis (OA). However, its potential modulatory role in early OA progression has not been investigated yet. Here, a mouse destabilization OA model in the tibia was used to investigate roles of PI3K/AKT signaling in the early subchondral bone changes and OA pathological process. We revealed a significant increase in PI3K/AKT signaling activation which was associated with aberrant bone formation in tibial subchondral bone following destabilizing the medial meniscus (DMM), which was effectively prevented by treatment with PI3K/AKT signaling inhibitor LY294002...
January 11, 2018: Journal of Cellular Physiology
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