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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
#1
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/28754245/iatrogenic-trochlear-chondral-defects-after-anterolateral-placement-of-retrograde-femoral-nails
#2
Nicholas N DePhillipo, George F Lebus, Mark E Cinque, Nicholas I Kennedy, Jorge Chahla, Robert F LaPrade
Femoral shaft fractures are common injuries with an incidence of 37.1 per 100,000 person-years in the United States. Retrograde femoral nailing is an increasingly used treatment strategy to manage these injuries, particularly in fractures below stemmed hip prostheses, in supracondylar or distal femur fractures, in fractures in pregnant or obese patients, and when concomitant ipsilateral acetabular/pelvic ring fractures are present. Retrograde fixation has been shown to be a viable option with union rates comparable to antegrade intramedullary nailing...
July 25, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28748195/functional-brace-in-acl-surgery-force-quantification-in-an-in-vivo-study
#3
Robert F LaPrade, Melanie B Venderley, Kimi D Dahl, Grant J Dornan, Travis Lee Turnbull
BACKGROUND: A need exists for a functional anterior cruciate ligament (ACL) brace that dynamically supports the knee joint to match the angle-dependent forces of a native ACL, especially in the early postoperative period. PURPOSE/HYPOTHESIS: The purpose of this study was to quantify the posteriorly directed external forces applied to the anterior proximal tibia by both a static and a dynamic force ACL brace. The proximal strap forces applied by the static force brace were hypothesized to remain relatively constant regardless of knee flexion angle compared with those of the dynamic force brace...
July 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28719562/meniscal-repair-reconsidering-indications-techniques-and-biologic-augmentation
#4
Jarret M Woodmass, Robert F LaPrade, Nicholas A Sgaglione, Norimasa Nakamura, Aaron J Krych
No abstract text is available yet for this article.
July 19, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28706829/platelet-rich-plasma-augmentation-for-hip-arthroscopy
#5
Sandeep Mannava, Jorge Chahla, Andrew G Geeslin, Mark E Cinque, Kaitlyn E Whitney, Thos A Evans, Salvatore J Frangiamore, George LeBus, Jonathan Godin, Robert F LaPrade, Marc J Philippon
Biological augmentation and therapeutics are being increasingly used in musculoskeletal and orthopaedic care. Platelet-rich plasma (PRP) is produced from centrifugation of peripheral blood, a process that concentrates platelets within autologous plasma. The process of PRP preparation is fundamental in controlling the contents, and it influences its therapeutic potential. Platelets contain alpha granules that store and release a variety of growth factors and other proteins that may augment the healing environment; PRP also has the added benefit of promoting postsurgical hemostasis...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28706814/tibial-allograft-transfer-for-medial-tibial-plateau-resurfacing
#6
Jonathan A Godin, Salvatore Frangiamore, Jorge Chahla, Mark E Cinque, Nicholas N DePhillipo, Robert F LaPrade
A large cartilage lesion of the tibial plateau with a deficient meniscus in a young patient is a challenging pathology for the orthopaedic surgeon due to the limited options available. While hemiarthroplasty procedures can be an option, the risk of revision in a young patient is high, and therefore a reconstructive procedure is advocated. The purpose of this Technical Note is to describe our technique for tibial plateau resurfacing, including the preparation and implantation of a medial tibial plateau and medial meniscal allograft, in a patient with a post-traumatic KD-4 knee dislocation with a medial tibial plateau rim fracture, medial meniscus deficiency, and medial tibiofemoral joint subluxation...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28706794/notchplasty-for-the-arthroscopic-treatment-of-limited-knee-extension
#7
Marcio B Ferrari, Sandeep Mannava, Nicholas DePhillipo, George Sanchez, Robert F LaPrade
Knee osteoarthritis may lead to narrowing of the intercondylar notch due to osteophyte formation, thereby causing changes in native knee biomechanics. The normal close contact between the condyles and the anterior cruciate ligament (ACL) during knee extension may be compromised due to narrowing of the notch and result in ACL damage, progression of knee osteoarthritis, and loss of knee extension. Outcomes after a notchplasty procedure are well reported for ACL reconstruction in young patients. However, there remains a lack of studies evaluating this procedure in the setting of knee osteoarthritis in patients with a symptomatic loss of knee extension...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28679050/evidence-for-the-trophic-transfer-of-perfluoroalkylated-substances-in-a-temperate-macrotidal-estuary
#8
Gabriel Munoz, Hélène Budzinski, Marc Babut, Hilaire Drouineau, Mathilde Lauzent, Karyn Le Menach, Jérémy Lobry, Jonathan Selleslagh, Caroline Simonnet-Laprade, Pierre Labadie
The present survey examines the trophodynamics of a suite of 19 perfluoroalkyl substances (PFASs) in a temperate macrotidal estuary (Gironde, SW France). Across the 147 biota samples (18 taxa) collected, perfluorooctane sulfonate (PFOS), perfluorooctane sulfonamide (FOSA), and C8-C14 perfluoroalkyl carboxylates (PFCAs) were the most-recurrent analytes. ΣPFASs ranged between 0.66-45 ng per g of wet weight of the whole body. Benthic organisms had relatively high ΣPFASs compared to demersal organisms and displayed specific composition profiles with higher relative abundances of C8 and C9 PFCAs...
July 18, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28678124/an-in-vivo-simulation-of-isometry-of-the-anterolateral-aspect-of-the-healthy-knee
#9
Willem A Kernkamp, Samuel K Van de Velde, Tsung-Yuan Tsai, Ewoud R A van Arkel, Peter D Asnis, Rob G H H Nelissen, Robert F LaPrade, Bertram Zarins, Guoan Li
BACKGROUND: To assess the isometry of theoretical lateral extra-articular reconstruction (LER), we evaluated theoretical grafts attached to various points on the lateral femoral condylar area and to either Gerdy's tubercle or the anatomic attachment site of the anterolateral ligament to the tibia. METHODS: In 18 subjects, healthy knees with no history of either injury or surgery involving the lower extremity were studied. The subjects performed a sit-to-stand motion (from approximately 90° of flexion to full extension), and each knee was studied using magnetic resonance and dual fluoroscopic imaging techniques...
July 5, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28666036/arthroscopic-excision-of-bipartite-patella-with-preservation-of-lateral-retinaculum-in-an-adolescent-ice-hockey-player
#10
Evan W James, Christopher M LaPrade, Jorge Chahla, Mark E Cinque, Nicholas I Kennedy, Robert F LaPrade
Bipartite patella usually is an asymptomatic anatomical variant. However, in some adolescent athletes, it causes anterior knee pain, resulting in decreased participation and performance. We report the case of a high-level adolescent ice hockey player who underwent successful arthroscopic excision with preservation of the lateral retinaculum of a symptomatic bipartite patella after failed nonoperative treatment. The patient returned to play by 6 weeks, and 31-month subjective follow-up scores showed high satisfaction and good clinical outcomes...
May 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28660229/lateral-meniscus-posterior-root-and-meniscofemoral-ligaments-as-stabilizing-structures-in-the-acl-deficient-knee-a-biomechanical-study
#11
Jonathan M Frank, Gilbert Moatshe, Alex W Brady, Grant J Dornan, Ashley Coggins, Kyle J Muckenhirn, Erik L Slette, Jacob D Mikula, Robert F LaPrade
BACKGROUND: The biomechanical effects of lateral meniscal posterior root tears with and without meniscofemoral ligament (MFL) tears in anterior cruciate ligament (ACL)-deficient knees have not been studied in detail. PURPOSE: To determine the biomechanical effects of the lateral meniscus (LM) posterior root tear in ACL-intact and ACL-deficient knees. In addition, the biomechanical effects of disrupting the MFLs in ACL-deficient knees with meniscal root tears were evaluated...
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28654807/per-and-poly-fluoroalkyl-compounds-in-freshwater-fish-from-the-rh%C3%A3-ne-river-influence-of-fish-size-diet-prey-contamination-and-biotransformation
#12
Marc Babut, Pierre Labadie, Caroline Simonnet-Laprade, Gabriel Munoz, Marie-Claude Roger, Benoit J D Ferrari, Hélène Budzinski, Eve Sivade
Pools of aquatic plants and benthic invertebrates were collected along with 47 individuals from three cyprinid fish species (Barbus barbus, Gobio gobio, Rutilus rutilus) at a site in the Rhône River (France). Carbon and nitrogen isotopic ratios (δ(13)C and δ(15)N) and a wide range of per- and poly-fluorinated chemicals (PFASs) were analysed in all samples. The sum of PFAS concentrations (ΣPFAS) increased from aquatic plants to fish dorsal muscles; molecular profiles were dominated by C9-C13 perfluorocarboxylic acids (PFCAs), while perfluorooctane sulfonate (PFOS) and perfluorooctane sulfonamide (FOSA) were detected in all samples at lower concentrations...
June 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28637749/cell-cycle-dependent-spatial-segregation-of-telomerase-from-sites-of-dna-damage
#13
Faissal Ouenzar, Maxime Lalonde, Hadrien Laprade, Geneviève Morin, Franck Gallardo, Samuel Tremblay-Belzile, Pascal Chartrand
Telomerase can generate a novel telomere at DNA double-strand breaks (DSBs), an event called de novo telomere addition. How this activity is suppressed remains unclear. Combining single-molecule imaging and deep sequencing, we show that the budding yeast telomerase RNA (TLC1 RNA) is spatially segregated to the nucleolus and excluded from sites of DNA repair in a cell cycle-dependent manner. Although TLC1 RNA accumulates in the nucleoplasm in G1/S, Pif1 activity promotes TLC1 RNA localization in the nucleolus in G2/M...
August 7, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28609131/a-comprehensive-reanalysis-of-the-distal-iliotibial-band-quantitative-anatomy-radiographic-markers-and-biomechanical-properties
#14
Jonathan A Godin, Jorge Chahla, Gilbert Moatshe, Bradley M Kruckeberg, Kyle J Muckenhirn, Alexander R Vap, Andrew G Geeslin, Robert F LaPrade
BACKGROUND: The qualitative anatomy of the distal iliotibial band (ITB) has previously been described. However, a comprehensive characterization of the quantitative anatomic, radiographic, and biomechanical properties of the Kaplan fibers of the deep distal ITB has not yet been established. It is paramount to delineate these characteristics to fully understand the distal ITB's contribution to rotational knee stability. Purpose/Hypothesis: There were 2 distinct purposes for this study: (1) to perform a quantitative anatomic and radiographic evaluation of the distal ITB's attachment sites and their relationships to pertinent osseous and soft tissue landmarks, and (2) to quantify the biomechanical properties of the deep (Kaplan) fibers of the distal ITB...
June 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28607939/the-role-of-the-peripheral-passive-rotation-stabilizers-of-the-knee-with-intact-collateral-and-cruciate-ligaments-a-biomechanical-study
#15
Alexander R Vap, Jason M Schon, Gilbert Moatshe, Raphael S Cruz, Alex W Brady, Grant J Dornan, Travis Lee Turnbull, Robert F LaPrade
BACKGROUND: A subset of patients have clinical internal and/or external knee rotational instability despite no apparent injury to the cruciate or collateral ligaments. PURPOSE/HYPOTHESIS: The purpose of this study was to assess the effect of sequentially cutting the posterolateral, anterolateral, posteromedial, and anteromedial structures of the knee on rotational stability in the setting of intact cruciate and collateral ligaments. It was hypothesized that cutting of the iliotibial band (ITB), anterolateral ligament and lateral capsule (ALL/LC), posterior oblique ligament (POL), and posteromedial capsule (PMC) would significantly increase internal rotation, while sectioning of the anteromedial capsule (AMC) and the popliteus tendon and popliteofibular ligament (PLT/PFL) would lead to a significant increase in external knee rotation...
May 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28589159/demographics-and-injuries-associated-with-knee-dislocation-a-prospective-review-of-303-patients
#16
Gilbert Moatshe, Grant J Dornan, Sverre Løken, Tom C Ludvigsen, Robert F LaPrade, Lars Engebretsen
BACKGROUND: Information on the incidence, injury mechanisms, ligament injury patterns, and associated injuries of knee dislocations is lacking in the literature. There is a need to characterize ligament injury patterns and associated injuries in knee dislocations to avoid missing common associated diagnoses and to plan surgical treatment. PURPOSE: To evaluate patient demographics, ligament injury patterns and associated injury patterns, and associated injuries in patients with knee dislocation...
May 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28580266/open-patellar-tendon-tenotomy-debridement-and-repair-technique-augmented-with-platelet-rich-plasma-for-recalcitrant-patellar-tendinopathy
#17
Bradley M Kruckeberg, Jorge Chahla, Marcio B Ferrari, George Sanchez, Gilbert Moatshe, Robert F LaPrade
Patellar tendinopathy is a disabling condition that frequently affects the athletic population, especially athletes undergoing repetitive impact forces as a result of jumping and landing activities. Most cases are initially treated conservatively, but if symptoms persist, surgical treatment is warranted. Options for surgical treatment include both arthroscopic and open techniques. The purpose of this Technical Note is to detail our open patellar tendon tenotomy, debridement, and repair technique augmented with platelet-rich plasma...
April 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28580265/bone-marrow-aspirate-concentrate-harvesting-and-processing-technique
#18
Jorge Chahla, Sandeep Mannava, Mark E Cinque, Andrew G Geeslin, David Codina, Robert F LaPrade
Bone marrow obtained by iliac crest aspiration is a common source for harvesting mesenchymal stem cells, other progenitor cells, and associated cytokine/growth factors. Recent studies have reported good to excellent outcomes with the use of bone marrow aspirate concentrate (BMAC) for pain relief in the treatment of focal chondral lesions and osteoarthritis of the knee. However, the harvesting and processing technique are crucial to achieve satisfactory results. Several studies have examined outcomes after BMAC injection, with encouraging results, but there is a lack of consensus in terms of the frequency of injection, the amount of BMAC that is injected, and the timing of BMAC injections...
April 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28580257/posterior-surgical-approach-to-the-knee
#19
Scott C Faucett, James Gannon, Jorge Chahla, Marcio B Ferrari, Robert F LaPrade
Posterior knee approaches are reliable techniques to address the treatment of various pathologies of the posterior region of the knee, including Baker cyst excision, tibial plateau fracture fixation, posterior cruciate ligament avulsions and inlay reconstructions, femoral condyle cartilage procedures, posterior meniscal repair and loose body removal among others. Surgery in the posterior knee region can be challenging because of the presence of neurovascular structures including the tibial nerve, popliteal artery and vein, and common peroneal nerve; thus, it is less commonly performed...
April 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28580255/arthroscopy-assisted-fabella-excision-surgical%C3%A2-technique
#20
Matthew T Provencher, George Sanchez, Márcio B Ferrari, Gilbert Moatshe, Jorge Chahla, Ramesses Akamefula, Robert F LaPrade
The fabella is an anatomic variant not seen in all individuals and can potentially be a source of chronic knee pain due to chondromalacia, osteoarthritis, fractures, or biomechanical pressure against the lateral femoral condyle. It is situated intra-articular, close to the lateral femoral condyle, the lateral gastrocnemius head tendon, and the fabellofibular ligament. Given its rarity, the diagnosis of a symptomatic fabella is often overlooked when evaluating patients with persistent posterolateral knee pain...
April 2017: Arthroscopy Techniques
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