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https://www.readbyqxmd.com/read/28933489/drop-friction-on-liquid-infused-materials
#1
Armelle Keiser, Ludovic Keiser, Christophe Clanet, David Quéré
We discuss in this paper the nature of the friction generated as a drop glides on a textured material infused by another liquid. Different regimes are found, depending on the viscosities of both liquids. While a viscous drop simply obeys a Stokes-type friction, the force opposing a drop moving on a viscous substrate becomes non-linear in velocity. A liquid on an infused material is surrounded by a meniscus, and this specific feature is proposed to be responsible for the special frictions observed on both adhesive and non-adhesive substrates...
September 21, 2017: Soft Matter
https://www.readbyqxmd.com/read/28933331/-comparison-of-the-arthroscopic-finding-in-the-knee-joint-and-the-mri-retrospective-study
#2
K Šimeček, P Látal, J Duda, M Šimeček
PURPOSE OF THE STUDY Our retrospective study presents the comparison of the preoperative magnetic resonance imaging of the knee joint - MRI - and the arthroscopic finding - ASC. Its aim is to find out how a positive or a negative finding of MRI corresponds with the operative finding and how much the experience of radiologist contributes to the conformity. MATERIAL AND METHODS The MRI findings of knee joints treated surgically at two departments in 2013 and 2014 were assessed. The MRI was performed in a total of 470 patients who subsequently underwent an arthroscopic surgery...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28930832/early-central-and-peripheral-corneal-microstructural-changes-in-type-2-diabetes-mellitus-patients-identified-using-in-vivo-confocal-microscopy-a-case-control-study
#3
Jing-Hao Qu, Lei Tian, Xiao-Yu Zhang, Xu-Guang Sun
The aim of this study was to find early central and peripheral corneal microstructural changes in healthy subjects and type 2 diabetes mellitus (T2DM) patients with/without cornea fluorescein dot staining.This is a prospective case-control study of T2DM patients with/without cornea fluorescein dot staining. Age, sex, duration of diabetes, and serum glycosylated hemoglobin A1c (HbA1c) levels were recorded. Keratograph 5 M (K5 M) and in vivo confocal microscopy were performed on all subjects. The cornea was divided into 5 zones: central, superior, temporal, nasal, and inferior...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28928664/yougui-pills-attenuate-cartilage-degeneration-via-activation-of-tgf-%C3%AE-smad-signaling-in-chondrocyte-of-osteoarthritic-mouse-model
#4
Lei Zhang, Ping-Er Wang, Jun Ying, Xing Jin, Cheng Luo, Taotao Xu, Shibing Xu, Rui Dong, Luwei Xiao, Peijian Tong, Hongting Jin
Yougui pills (YGPs) have been used for centuries in the treatment of Chinese patients with Kidney-Yang Deficiency Syndrome. Despite the fact that the efficiency of YGPs on treating osteoarthritis has been verified in clinic, the underlying mechanisms are not totally understood. The present study observes the therapeutic role of YGPs and mechanisms underlying its chondroprotective action in osteoarthritic cartilage. To evaluate the chondroprotective effects of YGPs, we examined the impact of orally administered YGPs in a model of destabilization of the medial meniscus (DMM)...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28925568/the-fibular-meniscus-of-the-kangaroo-as-an-adaptation-against-external-tibial-rotation-during-saltatorial-locomotion
#5
Adrian C Miller, Martin A Cake, Natalie M Warburton
The kangaroo knee is, as in other species, a complex diarthrodial joint dependent on interacting osseous, cartilaginous and ligamentous components for its stability. While principal load bearing occurs through the femorotibial articulation, additional lateral articulations involving the fibula and lateral fabella also contribute to the functional arrangement. Several fibrocartilage and ligamentous structures in this joint remain unexplained or have been misunderstood in previous studies. In this study, we review the existing literature on the structure of the kangaroo 'knee' before providing a new description of the gross anatomical and histological structures...
September 19, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28920170/meniscal-extrusion-seen-on-ultrasonography-affects-the-development-of-radiographic-knee-osteoarthritis-a-3-year-prospective-cohort-study
#6
Daisuke Chiba, Shugo Maeda, Eiji Sasaki, Seiya Ota, Shigeyuki Nakaji, Eiichi Tsuda, Yasuyuki Ishibashi
The objective of this study is to determine whether meniscal extrusion (ME) of the medial meniscus on ultrasonography affects knee osteoarthritis (KOA) progression during 3-year follow-up. Two hundred seventy volunteers (70 men, 200 women; mean age 60.5 years) participated. Weight-bearing radiographs were evaluated. All subjects had medial radiographic KOA (Kellgren-Lawrence grade [KLG], ≥ 2) in at least one knee at baseline (BL). KLG 2 was defined as moderate KOA (MKOA); KLG 3 and 4 were defined as severe KOA (SKOA)...
September 17, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28919183/impact-of-oral-vitamin-d-supplementation-on-the-ocular-surface-in-people-with-dry-eye-and-or-low-serum-vitamin-d
#7
Chih-Huang Yang, Julie Albietz, Damien G Harkin, Michael G Kimlin, Katrina L Schmid
PURPOSE: To determine the possible association between serum vitamin D levels and dry eye symptoms, and the impact of an oral vitamin D supplement. METHODS: Three linked studies were performed. (i) 29 older adult participants, (ii) 29 dry eyed participants, and (iii) 2-month vitamin D supplementation for 32 dry eyed/low serum vitamin D levelled participants. All participants were assessed by the Ocular Surface Diseases Index (OSDI) to determine dry eye symptoms, and the phenol red thread test (PRT) and/or Schirmer's tear test, tear meniscus height, non-invasive tear break up time, grading ocular surface redness and fluorescein staining of the cornea to detect the tear quality and ocular surface conditions...
September 11, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28917521/midterm-results-of-combined-intra-and-extra-articular-acl-reconstruction-compared-to-historical-acl-reconstruction-data-multicenter-study-of-the-francophone-society-of-arthroscopy
#8
P Imbert, S Lustig, C Steltzlen, C Batailler, P Colombet, F Dalmay, S Bertiaux, P D'ingrado, F P Ehkirch, M L Louis, R Pailhé, J C Panisset, B Schlaterrer, B Sonnery-Cottet, L Sigwalt, D Saragaglia, C Lutz
INTRODUCTION: During anterior cruciate ligament (ACL) reconstruction procedures, anterolateral reconstruction (ALR) can also be performed to improve the knee's rotational stability. However, the effectiveness of this supplemental technique and its impact on the risk of retears and on the onset of secondary degenerative changesare controversial. HYPOTHESIS: ALR improves control over the pivot shift, reduces the retear risk and delays the appearance of secondary degenerative lesions...
September 13, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28915439/alpha-mangostin-suppresses-interleukin-1%C3%AE-induced-apoptosis-in-rat-chondrocytes-by-inhibiting-the-nf-%C3%AE%C2%BAb-signaling-pathway-and-delays-the-progression-of-osteoarthritis-in-a-rat-model
#9
Tianlong Pan, Rong Chen, Dengying Wu, Ningyu Cai, Xuchao Shi, Bin Li, Jun Pan
Osteoarthritis (OA) is a chronic degenerative joint disease that is characterized by progressive joint dysfunction and pain. Apoptosis and catabolism in chondrocytes play critical roles in the development of OA. Alpha-Mangostin (α-MG), one of the main components of the mangosteen, has been reported to have anti-apoptotic, anti-inflammatory and antioxidant effects. We investigated the therapeutic effects of α-MG on OA through experiments on rat chondrocytes in vitro and in a rat model of OA induced by destabilization of the medial meniscus (DMM)...
September 12, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28913685/-ramp-lesions-tips-and-tricks-in-diagnostics-and-therapy
#10
REVIEW
R Seil, A Hoffmann, S Scheffler, D Theisen, C Mouton, D Pape
There is an increasing biomechanical and anatomical understanding of the different types of meniscal lesions. Lesions of the posterior part of the medial meniscus in the meniscosynovial area have recently received increased attention. They generally occur in association with anterior cruciate ligament (ACL) injuries. They are often missed ("hidden lesions") due to the fact that they cannot be seen by routine anterior arthroscopic inspection. Furthermore, meniscosynovial lesions play a role in anteroposterior knee laxity and, as such, they may be a cause of failure of ACL reconstruction or of postoperative persistent laxity...
September 14, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28910961/paeonol-alleviates-interleukin-1%C3%AE-induced-inflammatory-responses-in-chondrocytes-during-osteoarthritis
#11
Mingran Liu, Shuqiang Zhong, Ruifeng Kong, Hong Shao, Chunyan Wang, Hongying Piao, Wentao Lv, Xiaojie Chu, Yan Zhao
Interleukin-1β (IL-1β)-induced inflammatory responses in chondrocytes play an important role in the pathogenesis of osteoarthritis (OA). Searching medicines that affect IL-1β-mediated chondrocytes function is critical in developing therapies for OA. Paeonol, as an important component in traditional Chinese medicine, has anti-inflammatory activity and can offer therapy for a multitude of inflammatory-related diseases. The purpose of this study was to investigate whether paeonol could alleviate the progression of OA through inhibition of IL-1β-induced inflammatory responses in chondrocytes...
September 10, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28910571/factors-that-influence-tear-meniscus-area-and-conjunctivochalasis-the-singapore-indian-eye-study
#12
Stanley Poh, Ryan Lee, Jennifer Gao, Carin Tan, Preeti Gupta, Charumathi Sabanayagam, Ching-Yu Cheng, Tien-Yin Wong, Louis Tong
PURPOSE: Assessment of tear film and conjunctiva is critical to define presence and severity of ocular surface disease. We aimed to characterize tear meniscus area (TMA) and conjunctivochalasis by anterior segment optical coherence tomography (ASOCT) in population-based patients and identify potential factors associated with low TMA and severe conjunctivochalasis. METHODS: Study subjects were enrolled from The Singapore Indian Eye Study, a population-based study of Asian Indian in Singapore...
September 14, 2017: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/28910532/roles-of-wettability-and-supercooling-in-cyclopentane-hydrate-spreading-over-a-substrate
#13
Abdelhafid Touil, Daniel Broseta, Nelly Hobeika, Ross Brown
We use transmission optical microscopy to observe cyclopentane hydrate growth in sub-mm, open glass capillaries, mimicking cylindrical pores. The capillary is initially loaded with water and the guest fluid (cyclopentane) and thus possesses three menisci, that between water and cyclopentane (CP) in the middle, and two menisci with the vapors at the ends. At temperatures T below the equilibrium temperature Teq ∼ 7°C, the hydrate nucleates on the water-CP meniscus, rapidly coating it with an immobile, polycrystalline crust...
September 14, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28903016/arthroscopic-meniscectomy-for-degenerative-meniscal-tears-reduces-knee-pain-but-is-not-cost-effective-in-a-routine-health-care-setting-a-multi-center-longitudinal-observational-study-using-data-from-the-osteoarthritis-initiative
#14
Jan J Rongen, Tim M Govers, Pieter Buma, Maroeska M Rovers, Gerjon Hannink
OBJECTIVES: It is disputed whether arthroscopic meniscectomy is an (cost-) effective treatment for degenerative meniscus tears in day-to-day clinical practice. The objective of this study was to assess the cost-effectiveness of arthroscopic meniscectomy in subjects with knee osteoarthritis, in routine clinical practice, while taking into account the increased risk for future knee replacement surgery. We compared cost-effectiveness of arthroscopic meniscectomy compared to no surgery. DESIGN: - We used a state transition (Markov) simulation model to evaluate the cost-effectiveness of arthroscopic meniscectomy compared to no surgery in subjects with knee osteoarthritis (age range 45- 79 years)...
September 10, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28902600/contact-analysis-of-horizontal-cleavage-tear-treatment
#15
Carlos Uquillas, Sally Arno, Austin Ramme, Cheongeun Oh, Peter Walker, Robert Meislin
Horizontal cleavage tears (HCT) commonly occur in the posterior horn of the medial meniscus due to aging and degeneration. The purpose of this study was to investigate the surgical treatment of HCTs and their effect on dynamic tibiofemoral contact mechanics. The tibiofemoral contact mechanics of 10 cadaver knees were investigated using a custom dynamic loading apparatus, pressure sensor, and motion sensing camera. Three loading conditions were analyzed: 500 N compressive load, 500 N compressive load with 100 N posterior shear, and 500 N compressive load with 2...
May 2017: Bulletin of the Hospital for Joint Diseases
https://www.readbyqxmd.com/read/28899407/association-of-medial-meniscal-extrusion-with-medial-tibial-osteophyte-distance-detected-by-t2-mapping-mri-in-patients-with-early-stage-knee-osteoarthritis
#16
Shinnosuke Hada, Muneaki Ishijima, Haruka Kaneko, Mayuko Kinoshita, Lizu Liu, Ryo Sadatsuki, Ippei Futami, Anwajan Yusup, Tomohiro Takamura, Hitoshi Arita, Jun Shiozawa, Takako Aoki, Yuji Takazawa, Hiroshi Ikeda, Shigeki Aoki, Hisashi Kurosawa, Yasunori Okada, Kazuo Kaneko
BACKGROUND: Medial meniscal extrusion (MME) is associated with progression of medial knee osteoarthritis (OA), but no or little information is available for relationships between MME and osteophytes, which are found in cartilage and bone parts. Because of the limitation in detectability of the cartilage part of osteophytes by radiography or conventional magnetic resonance imaging (MRI), the rate of development and size of osteophytes appear to have been underestimated. Because T2 mapping MRI may enable us to evaluate the cartilage part of osteophytes, we aimed to examine the association between MME and OA-related changes, including osteophytes, by using conventional and T2 mapping MRI...
September 12, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28895611/velocity-amplification-in-pressure-driven-flows-between-superhydrophobic-gratings-of-small-solid-fraction
#17
Ehud Yariv
With diminishing fraction of their solid portion, compound gas-solid superhydrophobic surfaces exhibit a large amount of slip which allows for appreciable velocity amplification in pressure-driven microchannel flows. We address this small solid-fraction limit in the context of a grating-like configuration, where superhydrophobicity is provided by a periodic array of flat-meniscus bubbles which are trapped in a Cassie state within the grooved channel walls. Asymptotic analysis for both longitudinal and transverse flows reveals a logarithmic scaling of the effective slip length in the solid fraction of the compound boundaries, thus refuting earlier claims of an algebraic singularity...
September 12, 2017: Soft Matter
https://www.readbyqxmd.com/read/28894908/discoid-lateral-meniscus-can-be-overlooked-by-magnetic-resonance-imaging-in-patients-with-meniscal-tears
#18
Dong-Wook Sohn, Seong-Il Bin, Jong-Min Kim, Bum-Sik Lee, Seon-Jeong Kim
PURPOSE: MRI evaluation of torn lateral meniscus was compared with arthroscopy. This study calculates the sensitivity, specificity, and accuracy of MRI in determining the presence or absence of discoid lateral meniscus (DLM) for different tear types. METHODS: MR imaging of 156 knees with arthroscopically confirmed lateral meniscus tears was analysed. There were 78 knees (70 patients) in non-DLM group and 78 knees (74 patients) in DLM group on arthroscopy as the reference standard...
September 11, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28894756/relationships-between-tibiofemoral-contact-forces-and-cartilage-morphology-at-2-to-3-years-after-single-bundle-hamstring-anterior-cruciate-ligament-reconstruction-and-in-healthy-knees
#19
David John Saxby, Adam L Bryant, Xinyang Wang, Luca Modenese, Pauline Gerus, Jason M Konrath, Kim L Bennell, Karine Fortin, Tim Wrigley, Flavia M Cicuttini, Christopher J Vertullo, Julian A Feller, Tim Whitehead, Price Gallie, David G Lloyd
BACKGROUND: Prevention of knee osteoarthritis (OA) following anterior cruciate ligament (ACL) rupture and reconstruction is vital. Risk of postreconstruction knee OA is markedly increased by concurrent meniscal injury. It is unclear whether reconstruction results in normal relationships between tibiofemoral contact forces and cartilage morphology and whether meniscal injury modulates these relationships. HYPOTHESES: Since patients with isolated reconstructions (ie, without meniscal injury) are at lower risk for knee OA, we predicted that relationships between tibiofemoral contact forces and cartilage morphology would be similar to those of normal, healthy knees 2 to 3 years postreconstruction...
August 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28893426/outcomes-after-double-bundle-anterior-cruciate-ligament-reconstruction
#20
Ji Hyun Ahn, Ho Won Kang, Kug Jin Choi
PURPOSE: To identify the risk factors predicting unsatisfactory postoperative clinical outcomes after double-bundle (DB) anterior cruciate ligament (ACL) reconstruction using multivariate logistic regression. METHODS: Inclusion criteria were consecutive DB ACL reconstructions from January 2006 to September 2012 with a minimum 3-year follow-up. Exclusion criteria included (1) a delay to surgery from initial injury of more than 4 years (210 weeks); (2) contralateral knee pathology; (3) the lack of postoperative 3-dimensional computed tomography; (4) single-bundle ACL reconstruction; (5) revision ACL reconstruction; (6) meniscus allograft transplantation after total or subtotal meniscectomy; (7) multiple ligament surgeries...
September 8, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
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