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Meniscus repair

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https://www.readbyqxmd.com/read/29024126/highly-crystalline-c8-btbt-thin-film-transistors-by-lateral-homo-epitaxial-growth-on-printed-templates
#1
Robby Janneck, Nicolas Pilet, Satya Prakash Bommanaboyena, Benjamin Watts, Paul Heremans, Jan Genoe, Cedric Rolin
Highly crystalline thin films of organic semiconductors offer great potential for fundamental material studies as well as for realizing high-performance, low-cost flexible electronics. The fabrication of these films directly on inert substrates is typically done by meniscus-guided coating techniques. The resulting layers show morphological defects that hinder charge transport and induce large device-to-device variability. Here, a double-step method for organic semiconductor layers combining a solution-processed templating layer and a lateral homo-epitaxial growth by a thermal evaporation step is reported...
October 10, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29017608/autologous-mesenchymal-stem-cells-or-meniscal-cells-what-is-the-best-cell-source-for-regenerative-meniscus-treatment-in-an-early-osteoarthritis-situation
#2
Johannes Zellner, Girish Pattappa, Matthias Koch, Siegmund Lang, Johannes Weber, Christian G Pfeifer, Michael B Mueller, Richard Kujat, Michael Nerlich, Peter Angele
BACKGROUND: Treatment of meniscus tears within the avascular region represents a significant challenge, particularly in a situation of early osteoarthritis. Cell-based tissue engineering approaches have shown promising results. However, studies have not found a consensus on the appropriate autologous cell source in a clinical situation, specifically in a challenging degenerative environment. The present study sought to evaluate the appropriate cell source for autologous meniscal repair in a demanding setting of early osteoarthritis...
October 10, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28987527/risk-factors-for-radiographic-progression-of-osteoarthritis-after-partial-meniscectomy-of-discoid-lateral-meniscus-tear
#3
J H Ahn, D M Kang, K J Choi
INTRODUCTION: Partial meniscectomy has been preferred in the treatment of discoid lateral meniscus (DLM) with tear, rather than total or subtotal meniscectomy, which could lead to late radiographic degenerative changes. HYPOTHESIS: One or more risk factors contribute to radiographic progression of osteoarthritis after partial meniscectomy of DLM tear. MATERIAL AND METHODS: Inclusion criteria were consecutive patients who underwent arthroscopic surgeries for DLM tear from January 2005 to December 2010 by one surgeon...
October 5, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28969820/editorial-commentary-feeling-the-pressure-a-biomechanical-analysis-of-all-inside-and-inside-out-knee-meniscus-repair
#4
EDITORIAL
F Alan Barber
A biomechanical, time-zero comparison found that both No. 2-0 UltraBraid inside-out sutures and FasT-Fix 360 all-inside devices used to repair a displaced bucket handle knee meniscus tear increased the contact area in deeper flexion angles (at 45°-60°) and reduced the peak contact pressure (at 45°-90°). No significance difference was observed between the inside-out and all-inside repair techniques.
October 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28966381/meniscal-preservation-is-important-for-the-knee-joint
#5
Shantanu Sudhakar Patil, Anshu Shekhar, Sachin Ramchandra Tapasvi
Native joint preservation has gained importance in recent years. This is mostly to find solutions for limitations of arthroplasty. In the knee joint, the menisci perform critical functions, adding stability during range of motion and efficiently transferring load across the tibiofemoral articulation while protecting the cartilage. The menisci are the most common injury seen by orthopedicians, especially in the younger active patients. Advances in technology and our knowledge on functioning of the knee joint have made meniscus repair an important mode of treatment...
September 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28939961/acl-suturing-using-dynamic-intraligamentary-stabilisation-showing-good-clinical-outcome-but-a-high-reoperation-rate-a-retrospective-independent-study
#6
Martin Meister, Jonathan Koch, Felix Amsler, Markus P Arnold, Michael T Hirschmann
PURPOSE: Most of the clinical outcome studies dealing with ACL repair are from the developer's perspective. It is a fact that these developer-initiated studies tend to interpret the results rather in favour than against their developed technique or product. Hence, it was the purpose of the present independent investigator-initiated study to investigate the clinical and radiological outcomes as well as failure rate of patients who underwent an ACL suture using dynamic intraligamentary stabilisation device in a specialised independent knee clinic...
September 22, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28939894/plasticity-of-human-meniscus-fibrochondrocytes-a-study-on-effects-of-mitotic-divisions-and-oxygen-tension
#7
Yan Liang, Enaam Idrees, Stephen H J Andrews, Kirollos Labib, Alexander Szojka, Melanie Kunze, Andrea D Burbank, Aillette Mulet-Sierra, Nadr M Jomha, Adetola B Adesida
Meniscus fibrochondrocytes (MFCs) may be the optimal cell source to repair non-healing meniscus injuries using tissue engineering strategies. In this study, we investigated the effects of mitotic divisions and oxygen tension on the plasticity of adult human MFCs. Our assessment techniques included gene expression, biochemical, histological, and immunofluorescence assays. MFCs were expanded in monolayer culture with combined growth factors TGFβ1 and FGF-2 (T1F2) under normoxia (21% O2). Trilineage (adipogenesis, chondrogenesis and osteogenesis) differentiation was performed under both normoxic (21% O2) and hypoxic (3% O2) conditions...
September 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28913685/-ramp-lesions-tips-and-tricks-in-diagnostics-and-therapy
#8
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/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
#9
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/28886203/a-novel-method-for-repeatable-failure-testing-of-annulus-fibrosus
#10
Benjamin Werbner, Minhao Zhou, Grace O'Connell
Tears in the annulus fibrosus (AF) of the intervertebral disk can result in disk herniation and progressive degeneration. Understanding AF failure mechanics is important as research moves toward developing biological repair strategies for herniated disks. Unfortunately, failure mechanics of fiber-reinforced tissues, particularly tissues with fibers oriented off-axis from the applied load, is not well understood, partly due to the high variability in reported mechanical properties and a lack of standard techniques ensuring repeatable failure behavior...
November 1, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28873348/management-of-traumatic-meniscal-tear-and-degenerative-meniscal-lesions-save-the-meniscus
#11
REVIEW
P Beaufils, N Pujol
Meniscectomy remains one of the most frequent orthopedic procedures, despite meniscal sparing having been advocated for several decades now. Incidence is excessive in the light of scientifically robust studies demonstrating the interest of meniscal repair or of non-operative treatment for traumatic tear and of non-operative treatment for degenerative meniscal lesions. It is high time that the paradigm shifted, in favor of meniscal preservation. In traumatic tear, and most particularly longitudinal vertical tear in vascularized zones, repair shows a high success rates in terms of recovery time, functional outcome and cartilage protection...
September 2, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28865577/saucerization-versus-complete-resection-of-a-symptomatic-discoid-lateral-meniscus-at-short-and-long-term-follow-up-a-systematic-review
#12
REVIEW
Dallas M Smuin, Richard D Swenson, Aman Dhawan
PURPOSE: To evaluate the surgical outcomes of symptomatic discoid menisci after total meniscectomy, saucerization, and suture repair of tears of a discoid meniscus at short- and long-term follow-up. METHODS: A systematic review was conducted using the Pubmed and ScienceDirect databases in adherence with Preferred Reporting Items of Systematic Reviews and Meta-Analysis guidelines. Short- and long-term follow-up were defined as an average follow-up of <4 years and >4 years, respectively...
September 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28859517/a-novel-approach-for-meniscal-regeneration-using-kartogenin-treated-autologous-tendon-graft
#13
He Huang, Hongyao Xu, Jianning Zhao
BACKGROUND: The meniscus is one of the most commonly injured parts of the body, and meniscal healing is difficult. HYPOTHESIS: Kartogenin (KGN) induces tendon stem cells (TSCs) to differentiate into cartilage cells in vitro and form meniscus-like tissue in vivo. A damaged meniscus can be replaced with a KGN-treated autologous tendon graft. STUDY DESIGN: Controlled laboratory study. METHODS: In the in vitro experiments, TSCs were isolated from rabbit patellar tendons and cultured with various concentrations of KGN, from 0 to 1000 µM...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28852795/-meniscal-lesion-a%C3%A2-pre-osteoarthritic-condition-of-the-knee-joint
#14
REVIEW
L Goebel, J Reinhard, H Madry
BACKGROUND: A close relationship between meniscal damage and articular cartilage exist. Likewise, (partial) meniscectomy may lead to the development of osteoarthritis (OA). OBJECTIVES: With a special emphasis on therapeutic consequences for orthopaedic surgeons, the structural and functional relationship between meniscal tears/extrusion and cartilage loss, and/or the effect of meniscectomy or meniscal repair on the development of OA, are emphasized. MATERIALS AND METHODS: A selective literature review with implementation of own research findings...
August 29, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28852346/medial-meniscus-root-tear-in-the-middle-aged-patient-a-case-based-review
#15
Joseph H Carreau, Sean E Sitton, Matthew Bollier
Biomechanical studies have shown that medial meniscal root tears result in meniscal extrusion and increased tibiofemoral joint contact pressures, which can accelerate the progression of arthritis. Repair is generally recommended for acute injuries in the young, active patient population. The far more common presentation however, is a subacute root tear with medial meniscal extrusion in a middle aged patient. Coexisting arthritis is common in this population and complicates decision making. Treatment should be based on the severity of the underlying arthritis...
2017: Iowa Orthopaedic Journal
https://www.readbyqxmd.com/read/28815275/similar-failure-rate-in-immediate-post-operative-weight-bearing-versus-protected-weight-bearing-following-meniscal-repair-on-peripheral-vertical-meniscal-tears
#16
Bryan Perkins, Kyle R Gronbeck, Ruixian Alexander Yue, Marc A Tompkins
PURPOSE AND HYPOTHESIS: Post-operative weight bearing after meniscal repair is a point of debate among physicians. This study sought to evaluate whether patients adhering to an immediate WBAT rehabilitation programme have a higher failure rate compared to those adhering to a more traditional, protected, NWB status following meniscal repair. The null hypothesis was that there would be no difference in failure between the two groups. METHODS: A retrospective review of meniscal repair patients greater than 5 years from surgery was performed for patients receiving meniscal repair treatment...
August 16, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28812034/the-influence-of-medical-insurance-on-patient-access-to-orthopaedic-surgery-sports-medicine-appointments-under-the-affordable-care-act
#17
Daniel H Wiznia, Emmanuel Nwachuku, Alexander Roth, Chang-Yeon Kim, Ameya Save, Nidharshan S Anandasivam, Michael Medvecky, Richard Pelker
BACKGROUND: The goal of the Patient Protection and Affordable Care Act (PPACA) was to expand patient access to health care. Since the rollout of the PPACA, Medicaid patients have demonstrated difficulty obtaining appointments in some specialty care settings. PURPOSE: To assess the effect of insurance type (Medicaid and private) on patient access to orthopaedic surgery sports medicine specialists for a semiurgent evaluation of a likely operative bucket-handle meniscus tear...
July 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28806097/opioid-demand-before-and-after-anterior-cruciate-ligament-reconstruction
#18
Chris A Anthony, Robert W Westermann, Nicholas Bedard, Natalie Glass, Matt Bollier, Carolyn M Hettrich, Brian R Wolf
BACKGROUND: Surgeons and health care systems have received a call to action in an effort to curtail the current opioid epidemic. PURPOSE: To (1) define the natural history of opioid demand after anterior cruciate ligament reconstruction (ACLR), (2) consider how filling preoperative opioid prescriptions affects opioid demand after ACLR, and (3) evaluate the effect of additional procedures during ACLR and patient age on postoperative opioid demand. STUDY DESIGN: Cohort study; Level of evidence, 3...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28806092/comparable-outcomes-after-bucket-handle-meniscal-repair-and-vertical-meniscal-repair-can-be-achieved-at-a-minimum-2-years-follow-up
#19
Gilbert Moatshe, Mark E Cinque, Jonathan A Godin, Alexander R Vap, Jorge Chahla, Robert F LaPrade
BACKGROUND: Meniscal tears can lead to significant pain and disability, necessitating surgical treatment. Nondisplaced vertical tears are usually smaller in size and can be repaired in most cases; however, bucket-handle tears are usually larger and displaced, and the repair of these tears can be challenging. Purpose/Hypothesis: The purpose was to report the outcomes after inside-out vertical mattress suture meniscal repair of bucket-handle tears and to compare these outcomes with those of patients who underwent repair of nondisplaced vertical meniscal tears with a minimum of 2 years' follow-up...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28803035/bone-tunnel-change-develops-within-two-weeks-of-double-bundle-anterior-cruciate-ligament-reconstruction-using-hamstring-autograft-a-comparison-of-different-postoperative-immobilization-periods-using-computed-tomography
#20
Ryo Shimizu, Nobuo Adachi, Minoru Ishifuro, Atsuo Nakamae, Masakazu Ishikawa, Masataka Deie, Mitsuo Ochi
BACKGROUND: The purpose of this study was to evaluate bone tunnel changes following anterior cruciate ligament (ACL) reconstruction during the early postoperative period using computed tomography (CT), and to understand the impact of postoperative immobilization on these changes. METHODS: Twenty patients who underwent double-bundle ACL reconstruction using hamstring tendon autografts were included. We subcategorized patients into two groups: patients who underwent isolated ACL reconstruction and had three days of knee immobilization (Group A, n=10); and patients with concomitant meniscus injuries who underwent ACL reconstruction and meniscus repair simultaneously (Group B, n=10) had their knees immobilized for two weeks after surgery...
August 9, 2017: Knee
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