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Meniscus repair

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https://www.readbyqxmd.com/read/27919916/posterior-meniscal-root-repairs-outcomes-of-an-anatomic-transtibial-pull-out-technique
#1
Robert F LaPrade, Lauren M Matheny, Samuel G Moulton, Evan W James, Chase S Dean
BACKGROUND: Outcomes after transtibial pull-out repair for posterior meniscal root tears remain underreported, and factors that may affect outcomes are unknown. PURPOSE/HYPOTHESIS: The purpose of this study was to compare patient-centered outcomes after transtibial pull-out repair for posterior root tears in patients <50 and ≥50 years of age. We hypothesized that improvement in function and activity level at minimum 2-year follow-up would be similar among patients <50 years of age compared with patients ≥50 years and among patients undergoing medial versus lateral root repairs...
December 5, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27895039/region-specific-effect-of-the-decellularized-meniscus-extracellular-matrix-on-mesenchymal-stem-cell-based-meniscus-tissue-engineering
#2
Kazunori Shimomura, Benjamin B Rothrauff, Rocky S Tuan
BACKGROUND: The meniscus is the most commonly injured knee structure, and surgical repair is often ineffective. Tissue engineering-based repair or regeneration may provide a needed solution. Decellularized, tissue-derived extracellular matrices (ECMs) have received attention for their potential use as tissue-engineered scaffolds. In considering meniscus-derived ECMs (mECMs) for meniscus tissue engineering, it is noteworthy that the inner and outer regions of the meniscus have different structural and biochemical features, potentially directing the differentiation of cells toward region-specific phenotypes...
November 28, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27894171/diagnosis-and-treatment-of-discoid-meniscus
#3
REVIEW
Jae-Gyoon Kim, Seung-Woo Han, Dae-Hee Lee
There is a greater incidence of discoid meniscus in Asian countries than in Western countries, and bilateral discoid menisci are also common. The discoid meniscus may be a congenital anomaly, and genetics or family history may play a role in the development of discoid menisci. Because the histology of discoid meniscus is different from that of normal meniscus, it is prone to tearing. Individuals with a discoid meniscus can be asymptomatic or symptomatic. Asymptomatic discoid menisci do not require treatment...
December 1, 2016: Knee Surgery & related Research
https://www.readbyqxmd.com/read/27894146/variables-associated-with-chondral-and-meniscal-injuries-in-anterior-cruciate-ligament-surgery
#4
E Lyle Cain, Glenn S Fleisig, Brent A Ponce, Hikel A Boohaker, Martha P George, Gerald McGwin, James R Andrews, Lawrence J Lemak, William G Clancy, Jeffrey R Dugas
This article aims to evaluate factors associated with chondral and meniscal lesions in primary and revision anterior cruciate ligament (ACL) reconstructions. ACL reconstructions from 2001 to 2008 at a single institution were retrospectively analyzed. Logistic regression was used to estimate the association between chondral and meniscal injuries and age, gender, tear chronicity, additional ligamentous injuries, sport type, and participation level. Of the 3,040 ACL reconstructions analyzed, 90.4% were primary reconstructions and 9...
November 28, 2016: Journal of Knee Surgery
https://www.readbyqxmd.com/read/27893158/articular-cartilage-scores-in-cranial-cruciate-ligament-deficient-dogs-with-or-without-bucket-handle-tears-of-the-medial-meniscus
#5
Kathryn Kaufman, Brian S Beale, Howard D Thames, W Brian Saunders
OBJECTIVE: To compare articular cartilage scores in cranial cruciate ligament (CCL)-deficient dogs with or without concurrent bucket handle tears (BHT) of the medial meniscus. STUDY DESIGN: Retrospective case series. ANIMALS: Client-owned dogs treated with arthroscopy and tibial plateau leveling osteotomy or extracapsular repair for complete CCL rupture (290 stifles from 264 dogs). METHODS: Medical records and arthroscopic images were reviewed...
November 28, 2016: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/27892399/a-suture-technique-for-easier-reduction-and-repair-of-bucket-handle-meniscal-tears-while-using-the-all-inside-devices
#6
Engin Çetinkaya, Ersin Kuyucu, Murat Gül, Osman Lapçin, Kutalmış Albayrak, Sarper Gürsu
Arthroscopic repair of bucket-handle meniscal tears is difficult due to their complex pathology. Many meniscal repair techniques such as all-inside, inside-out, and outside-in have been described for the treatment of these tears. Loss of reduction is a likely complication with the use of new-generation, all-inside suture instruments, as the tip of the needle is extracted following advancement of the first implant behind the capsule. The complication may be encountered quite often and renders the use of the meniscus repair instrument unusable and causes an irreparable iatrogenic injury in the meniscus...
2016: SICOT-J
https://www.readbyqxmd.com/read/27876676/anatomical-region-dependent-enhancement-of-3-dimensional-chondrogenic-differentiation-of-human-mesenchymal-stem-cells-by-soluble-meniscus-extracellular-matrix
#7
Benjamin B Rothrauff, Kazunori Shimomura, Riccardo Gottardi, Peter G Alexander, Rocky S Tuan
: Extracellular matrix (ECM) derived from decellularized tissues has been found to promote tissue neogenesis, most likely mediated by specific biochemical and physical signaling motifs that promote tissue-specific differentiation of progenitor cells. Decellularized ECM has been suggested to be efficacious for the repair of tissue injuries. However, decellularized meniscus contains a dense collagenous structure, which impedes cell seeding and infiltration and is not readily applicable for meniscus repair...
November 19, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27866344/development-of-a-fast-curing-tissue-adhesive-for-meniscus-tear-repair
#8
Agnieszka Izabela Bochyńska, Gerjon Hannink, Dennis Janssen, Pieter Buma, Dirk W Grijpma
Isocyanate-terminated adhesive amphiphilic block copolymers are attractive materials to treat meniscus tears due to their tuneable mechanical properties and good adhesive characteristics. However, a drawback of this class of materials is their relatively long curing time. In this study, we evaluate the use of an amine cross-linker and addition of catalysts as two strategies to accelerate the curing rates of a recently developed biodegradable reactive isocyanate-terminated hyper-branched adhesive block copolymer prepared from polyethylene glycol (PEG), trimethylene carbonate, citric acid and hexamethylene diisocyanate...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/27851984/intra-articular-therapy-with-recombinant-human-gdf5-arrests-disease-progression-and-stimulates-cartilage-repair-in-the-rat-medial-meniscus-transection-mmt-model-of-osteoarthritis
#9
W R Parrish, B A Byers, D Su, J Geesin, U Herzberg, S Wadsworth, A Bendele, B Story
OBJECTIVE: Investigation of osteoarthritis (OA) risk alleles suggests that reduced levels of growth and differentiation factor-5 (GDF5) may be a precipitating factor in OA. We hypothesized that intra-articular recombinant human GDF5 (rhGDF5) supplementation to the OA joint may alter disease progression. METHODS: A rat medial meniscus transection (MMT) joint instability OA model was used. Animals received either one intra-articular injection, or two or three bi-weekly intra-articular injections of either 30 μg or 100 μg of rhGDF5 beginning on day 21 post surgery after structural pathology had been established...
November 13, 2016: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/27849504/return-to-duty-rates-following-meniscal-repair-surgery-in-an-active-duty-military-population
#10
Joseph W Galvin, Chase A Dukes, Jason A Grassbaugh, Bryant G Marchant, Edward D Arrington
Meniscal injury is a common knee injury in a young athletic population. Maintaining the integrity of the meniscus is critical to reducing contact pressures on the tibiofemoral articulation. The purpose of this study is to analyze the outcomes of meniscal repair in a young military population. We conducted a retrospective review of all meniscal repairs performed on active duty Army personnel at a Military Medical Center from January 2002 to December 2012. One hundred seventy-eight active duty patients, mean age 28 (19-48) years underwent 178 meniscal repairs...
November 2016: Military Medicine
https://www.readbyqxmd.com/read/27826794/the-challenge-in-using-mesenchymal-stromal-cells-for-recellularization-of-decellularized-cartilage
#11
REVIEW
Zhao Huang, Owen Godkin, Gundula Schulze-Tanzil
Some decellularized musculoskeletal extracellular matrices (ECM)s derived from tissues such as bone, tendon and fibrocartilaginous meniscus have already been clinical use for tissue reconstruction. Repair of articular cartilage with its unique zonal ECM architecture and composition is still an unsolved problem, and the question is whether allogenic or xenogeneic decellularized cartilage ECM could serve as a biomimetic scaffold for this purpose.Hence, this survey outlines the present state of preparing decellularized cartilage ECM-derived scaffolds or composites for reconstruction of different cartilage types and of reseeding it particularly with mesenchymal stromal cells (MSCs)...
November 8, 2016: Stem Cell Reviews
https://www.readbyqxmd.com/read/27824492/evolution-of-intrameniscal-signal-intensity-alterations-detected-on-mri-over-24-months-in-patients-with-traumatic-anterior-cruciate-ligament-tear
#12
Julio Brandao Guimaraes, Luca Facchetti, Benedikt J Schwaiger, Alexandra S Gersing, Sharmila Majumdar, Benjamin C Ma, Xiaojuan Li, Thomas M Link
OBJECTIVE: The objective of our study was to assess the prevalence and evolution of intrameniscal signal-intensity alteration in subjects with an anterior cruciate ligament (ACL) tear over 24 months and compare clinical outcome and changes of cartilage between subjects with and those without this meniscal abnormality. MATERIALS AND METHODS: Fifty-seven subjects with an ACL tear were screened for intrameniscal signal-intensity alteration. Morphologic and compositional MRI was performed before ACL reconstruction and 12 and 24 months after ACL reconstruction...
November 8, 2016: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/27824291/development-of-a-micronized-meniscus-extracellular-matrix-scaffold-for-potential-augmentation-of-meniscus-repair-and-regeneration
#13
Farrah A Monibi, Chantelle C Bozynski, Keiichi Kuroki, Aaron M Stoker, Ferris Pfeiffer, Seth L Sherman, James Lee Cook
Decellularized scaffolds composed of extracellular matrix (ECM) hold promise for repair and regeneration of the meniscus, given the potential for ECM-based biomaterials to aid in stem cell recruitment, infiltration, and differentiation. The objectives of this study were to decellularize canine menisci in order to fabricate a micronized, ECM-derived scaffold, and to determine the cytocompatibility and repair potential of the scaffold ex vivo. Menisci were decellularized with a combination of physical agitation and chemical treatments...
November 8, 2016: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/27813662/matrix-metalloproteinase-activity-and-prostaglandin-e2-are-elevated-in-the-synovial-fluid-of-meniscus-tear-patients
#14
Betty Liu, Adam P Goode, Teralyn E Carter, Gangadhar M Utturkar, Janet L Huebner, Dean C Taylor, Claude T Moorman Iii, William E Garrett, Virginia B Kraus, Farshid Guilak, Louis E DeFrate, Amy L McNulty
PURPOSE: Meniscus tears are a common knee injury and are associated with the development of post-traumatic osteoarthritis (OA). The purpose of this study was to evaluate potential OA mediators in the synovial fluid and serum of meniscus tear subjects compared to those in the synovial fluid of radiographic non-OA control knees. MATERIALS AND METHODS: Sixteen subjects with an isolated unilateral meniscus injury and six subjects who served as reference controls (knee Kellgren-Lawrence grade 0-1) were recruited...
November 4, 2016: Connective Tissue Research
https://www.readbyqxmd.com/read/27813166/characteristics-of-meniscus-progenitor-cells-migrated-from-injured-meniscus
#15
Dongrim Seol, Cheng Zhou, Marc J Brouillette, Ino Song, Yin Yu, Hyeong Hun Choe, Abigail D Lehman, Kee W Jang, Douglas C Fredericks, Barbara J Laughlin, James A Martin
Serious meniscus injuries seldom heal and increase the risk for knee osteoarthritis; thus, there is a need to develop new reparative therapies. In that regard, stimulating tissue regeneration by autologous stem/progenitor cells has emerged as a promising new strategy. We showed previously that migratory chondrogenic progenitor cells (CPCs) were recruited to injured cartilage, where they showed a capability in situ tissue repair. Here, we tested the hypothesis that the meniscus contains a similar population of regenerative cells...
November 3, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/27807116/tibiofemoral-contact-mechanics-with-horizontal-cleavage-tear-and-resection-of-the-medial-meniscus-in-the-human-knee
#16
Jason L Koh, Seung Jin Yi, Yupeng Ren, Todd A Zimmerman, Li-Qun Zhang
BACKGROUND: The meniscus is known to increase the contact area and decrease contact pressure in the tibiofemoral compartments of the knee. Radial tears of the meniscal root attachment along with partial resections of the torn meniscal tissue decrease the contact area and increase pressure; however, there is a lack of information on the effects of a horizontal cleavage tear (HCT) and partial leaf meniscectomy of such tears on tibiofemoral contact pressure and contact area. METHODS: Twelve fresh-frozen human cadaveric knees were tested under 10 conditions: 5 serial conditions of posterior medial meniscectomy (intact meniscus, HCT, repaired HCT, inferior leaf resection, and resection of both inferior and superior leaves), each at 2 knee flexion angles (0° and 60°) under an 800-N axial load...
November 2, 2016: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/27802925/effects-of-suture-site-or-penetration-depth-on-anchor-location-in-all-inside-meniscal-repair
#17
Ryohei Uchida, Tatsuo Mae, Kunihiko Hiramatsu, Ryo Iuchi, Kazutaka Kinugasa, Konsei Shino, Hideki Yoshikawa, Ken Nakata
BACKGROUND: To evaluate the effects of suture site or penetration depth on anchor location in all-inside meniscal repair. METHODS: Eight fresh-frozen cadaveric knees were evaluated after meniscal repair using eight FasT-Fix360 (FF360) devices (Smith & Nephew Endoscopy, Andover, MA) (16 anchors) for each knee. The penetration depth was 14mm, the distance same from the periphery to insertion point, in four knees (Group A) and that in the remaining four knees (Group B) was 18mm...
December 2016: Knee
https://www.readbyqxmd.com/read/27793159/repair-of-isolated-horizontal-meniscal-tears-with-all-inside-suture-materials-using-the-overlock-method-outcome-study-with-a-minimum-2-year-follow-up
#18
Uğur Tiftikçi, Sancar Serbest
BACKGROUND: This study aimed to consider the use of a meniscal repair in patients in order to close the horizontal cleavage extending up to the avascular zone. The hypothesis was to examine the clinical and arthroscopic outcomes following meniscal repair of degenerative horizontal cleavage tears with new-generation all-inside suture materials using the overlock method. METHODS: We retrospectively reviewed a consecutive series of 55 patients which had a horizontal pattern, and finally, 27 patients with a horizontal tear only which required no additional intra-articular surgical intervention were included in the study...
October 28, 2016: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/27757329/mechanical-stimulation-increases-knee-meniscus-gene-rna-level-expression-in-adipose-derived-stromal-cells
#19
Elizabeth M Meier, Bin Wu, Aamir Siddiqui, Donna G Tepper, Michael T Longaker, Mai T Lam
: Efforts have been made to engineer knee meniscus tissue for injury repair, yet most attempts have been unsuccessful. Creating a cell source that resembles the complex, heterogeneous phenotype of the meniscus cell remains difficult. Stem cell differentiation has been investigated, mainly using bone marrow mesenchymal cells and biochemical means for differentiation, resulting in no solution. Mechanical stimulation has been investigated to an extent with no conclusion. Here, we explore the potential for and effectiveness of mechanical stimulation to induce the meniscal phenotype in adipose-derived stromal cells...
September 2016: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/27726749/posterior-root-meniscal-tears-preoperative-intraoperative-and-postoperative-imaging-for-transtibial-pullout-repair
#20
Andrew R Palisch, Ronald R Winters, Marc H Willis, Collin D Bray, Theodore B Shybut
The menisci play an important biomechanical role in axial load distribution of the knees by means of hoop strength, which is contingent on intact circumferentially oriented collagen fibers and meniscal root attachments. Disruption of the meniscal root attachments leads to altered biomechanics, resulting in progressive cartilage loss, osteoarthritis, and subchondral edema, with the potential for development of a subchondral insufficiency fracture. Identification of meniscal root tears at magnetic resonance (MR) imaging is crucial because new arthroscopic surgical techniques (transtibial pullout repair) have been developed to repair meniscal root tears and preserve the tibiofemoral cartilage of the knee...
October 2016: Radiographics: a Review Publication of the Radiological Society of North America, Inc
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