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Russell Chapin
In the postmeniscectomy or meniscal repair setting, there is overlap between expected postoperative change and findings of a re-torn meniscus, particularly increased T1-weighted or proton density signal contacting the articular surface. Protocol selection and accurate diagnosis requires knowledge of meniscal tear treatment, the expected postoperative appearance, and criteria for re-tear. Criteria for meniscal re-tear on MR imaging are high T2-weighted signal reaching the articular surface, abnormal meniscal morphology not explained by the surgery, or a displaced fragment...
November 2018: Radiologic Clinics of North America
Andrew N Pike, Jeanne C Patzkowski, Craig R Bottoni
Anterior cruciate ligament (ACL) ruptures are commonly associated with meniscal and articular cartilage injuries, and the presence of these defects influences both short- and long-term outcomes. Multiple variables are predictive of this pathology including time from injury, age, and sex. Revision ACL reconstructions demonstrate higher rates of chondral injury than primary reconstructions. Menisci are important secondary stabilizers of the knee in the setting of ACL deficiency, and specific tear types are more consistently associated with ACL injury...
October 12, 2018: Journal of the American Academy of Orthopaedic Surgeons
Prabath C A M Lodewijks, Diyar Delawi, Thomas L Bollen, Gawein R Dijkhuis, Nienke Wolterbeek, Jacco A C Zijl
PURPOSE: To describe the validity and inter- and intra-observer reliability of the lateral femoral notch sign (LFNS) as measured on conventional radiographs for diagnosing acute anterior cruciate ligament (ACL) injury. METHODS: Patients (≤ 45 years) with a traumatic knee injury who underwent knee arthroscopy and had preoperative radiographs were retrospectively screened for this case-control study. Included patients were assigned to the ACL injury group (n = 65) or the control group (n = 53) based on the arthroscopic findings...
October 13, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Yoshinori Ishii, Hideo Noguchi, Junko Sato, Hana Ishii, Nobukazu Ezawa, Shin-Ichi Toyabe
PURPOSE: It has not been established whether changes in the length of the patellar tendon (LPT) after total knee arthroplasty (TKA) affect clinical outcomes. Therefore, this prospective cohort study aimed to evaluate changes in the LPT over time postoperatively and clarify their impact on clinical outcomes after bilateral TKA, performed with differently designed mobile-bearing (meniscal-bearing and rotating-platform) implants on contralateral knees. METHODS: 51 patients who required staged bilateral mobile-bearing TKA were recruited...
October 13, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Nam-Ki Kim, Seong-Il Bin, Jong-Min Kim, Bum-Sik Lee, Chang-Rack Lee
PURPOSE: The purpose was to analyse the correlation between meniscal extrusion and position changes of the anterior horn and posterior horn after medial meniscal allograft transplantation. METHODS: Patients (n = 68) who underwent medial MAT were included. Anatomical positions of the anterior horn and posterior horn were measured, before and after surgery, using magnetic resonance images in the coronal and sagittal planes. The absolute and relative delta values of the anatomical positions were obtained, and the absolute and relative meniscal extrusion measurements were taken...
October 13, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
William E Ridley, Hao Xiang, Jason Han, Lloyd J Ridley
No abstract text is available yet for this article.
October 2018: Journal of Medical Imaging and Radiation Oncology
Omar M Albtoush, Marius Horger, Fabian Springer, Jan Fritz
The Segond fracture is a tibial avulsion injury of the insertion of the middle third of the lateral capsular ligament that is typically associated with anterior cruciate ligament and meniscal tears. The classically assigned mechanism of injury is a combination of internal rotation and varus stress. We report two cases of Segond fractures that presented with a variant pattern including osseous avulsion injuries of the medial collateral ligament at the femoral origin, anterior cruciate ligament tear, and pivot shift-type osseous contusion pattern, suggesting an alternative mechanism of injury that includes dominant valgus stress and external rotation components...
September 11, 2018: Clinical Imaging
Bertrand Sonnery-Cottet, Cesar Praz, Nikolaus Rosenstiel, William G Blakeney, Herve Ouanezar, Vikram Kandhari, Thais Dutra Vieira, Adnan Saithna
BACKGROUND: Ramp lesions are characterized by disruption of the peripheral meniscocapsular attachments of the posterior horn of the medial meniscus. Ramp repair performed at the time of anterior cruciate ligament reconstruction (ACLR) has been shown to improve knee biomechanics. PURPOSE: The primary objectives of this study were to evaluate the incidence of and risk factors for ramp lesions among a large series of patients undergoing ACLR. Secondary objectives were to determine the reoperation rate for failure of ramp repair, defined by subsequent reoperations for partial medial meniscectomy...
October 11, 2018: American Journal of Sports Medicine
Valentina Pedoia, Berk Norman, Sarah N Mehany, Matthew D Bucknor, Thomas M Link, Sharmila Majumdar
BACKGROUND: Semiquantitative assessment of MRI plays a central role in musculoskeletal research; however, in the clinical setting MRI reports often tend to be subjective and qualitative. Grading schemes utilized in research are not used because they are extraordinarily time-consuming and unfeasible in clinical practice. PURPOSE: To evaluate the ability of deep-learning models to detect and stage severity of meniscus and patellofemoral cartilage lesions in osteoarthritis and anterior cruciate ligament (ACL) subjects...
October 10, 2018: Journal of Magnetic Resonance Imaging: JMRI
Eric Hamrin Senorski, David Sundemo, Eleonor Svantesson, Ninni Sernert, Jüri-Toomas Kartus, Jón Karlsson, Kristian Samuelsson
PURPOSE: To determine preoperative predictors of long-term acceptable knee function and the development of osteoarthritis (OA) in long-term follow-up after anterior cruciate ligament (ACL) reconstruction. METHODS: This study is a long-term follow-up of 2 previous randomized controlled trials that included 193 patients who underwent unilateral ACL reconstruction with ipsilateral hamstring tendon or patellar tendon autografts. Patients who suffered multiligament injuries, major meniscal injuries, chondral lesions requiring surgical treatment, or had a previous ACL reconstruction were excluded...
October 6, 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
Adijat Omowumi Inyang, Tamer Abdalrahman, Deon Bezuidenhout, James Bowen, Chistopher Leonard Vaughan
The meniscus is a complex and frequently damaged tissue which requires a substitute capable of reproducing similar biomechanical functions. This study aims to develop a synthetic meniscal substitute that can mimic the function of the native meniscus. Medical grade silicones reinforced with nylon were fabricated using compression moulding and evaluated for mechanical and tribological properties. The optimal properties were obtained with tensile modulus increased considerably from 10.7 ± 2.9 MPa to 114...
September 18, 2018: Journal of the Mechanical Behavior of Biomedical Materials
Matthew E Gitelis, Rachel M Frank, Maximillian A Meyer, Gregory Cvetanovich, Brian J Cole
Meniscus allograft transplantation (MAT) has yielded excellent long-term functional outcomes when performed in properly indicated patients. When evaluating a patient for potential MAT, it is imperative to evaluate past medical history and past surgical procedures. The ideal MAT candidate is a chronologically and physiologically young patient (<50 years) with symptomatic meniscal deficiency. Existing pathology in the knee needs to be carefully considered and issues such as malalignment, cartilage defects, and/or ligamentous instability may require a staged or concomitant procedure...
September 2018: American Journal of Orthopedics
Bum-Sik Lee, Seong-Il Bin, Jong-Min Kim, Chang-Rack Lee, Young Hyun Choi, Young-Hee Kwon
PURPOSE: To evaluate whether fresh-frozen meniscal allograft shrinkage occurs only during the first year of the early remodeling period or progresses over the delayed period of midterm years and to determine whether these changes were associated with certain clinical and radiologic outcomes. METHODS: We retrospectively reviewed meniscal allograft transplantations (MATs) performed by 1 senior surgeon (S-I.B.) using fresh-frozen allograft from 2008 to 2013. The inclusion criteria were the patients who had midterm follow-up magnetic resonance imaging (MRI) scans between 3 and 6 years after isolated lateral MATs...
October 3, 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
Brittney A Luc-Harkey, Jason R Franz, Anthony C Hackney, J Troy Blackburn, Darin A Padua, Brian Pietrosimone
BACKGROUND: Aberrant mechanical loading during gait is hypothesized to contribute to the development of posttraumatic osteoarthritis following anterior cruciate ligament reconstruction. Our purpose was to determine if peak vertical ground reaction force and instantaneous vertical ground reaction force loading rate associate with the acute change in serum cartilage oligomeric matrix protein following a 20-minute bout of walking. METHODS: We enrolled thirty individuals with a unilateral anterior cruciate ligament reconstruction...
September 27, 2018: Clinical Biomechanics
Andreas M Seitz, Lutz Dürselen
PURPOSE: This systematic review intends to give an overview of the current knowledge on how allografts used for the reconstruction of cruciate ligaments and menisci are integrated and specifically perform regarding their biomechanical function. METHODS: Two reviewers reviewed the PubMed and Central Cochrane library with focus on the biomechanical integration of tendon ligament and meniscus allografts. The literature search was conducted in accordance with the PRISMA statement for reporting systematic reviews and meta-analyses...
October 5, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Kelechi R Okoroha, Ravi B Patel, Omar Kadri, Toufic R Jildeh, Andrew Krause, Caleb Gulledge, Eric C Makhni, Vasilios Moutzouros
PURPOSE: The purpose of this study was to identify if abnormal tibial alignment was a risk factor for lateral meniscus posterior root tears (LMPRT) in patients with acute anterior cruciate ligament (ACL) ruptures. METHODS: The medical charts of 200 patients treated for ACL ruptures between 2013 and 2016 were retrospectively reviewed and evaluated. MRI images and reports were assessed for concurrent meniscal tears. Radiographs were reviewed for tibia vara and tibial slope angles and MRI reports identifying lateral root tears were compared to intraoperative reports to determine accuracy...
October 4, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Giuseppe Milano
The anterior intermeniscal ligament represents the most anterior part of the "meniscal belt" and potentially contributes to shock-absorbing function of the menisci and to the transmission of circumferential hoop stresses in the knee. Sectioning of the anterior intermeniscal ligament produces mechanical changes similar to those observed with meniscal extrusion, with an increase and central shift in tibiofemoral contact force.
October 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
Victor A van de Graaf, Julia C A Noorduyn, Nienke W Willigenburg, Ise K Butter, Arthur de Gast, Ben W Mol, Daniel B F Saris, Jos W R Twisk, Rudolf W Poolman
Importance: Despite recent studies suggesting arthroscopic partial meniscectomy (APM) is not more effective than physical therapy (PT), the procedure is still frequently performed in patients with meniscal tears. Objective: To assess whether PT is noninferior to APM for improving patient-reported knee function in patients with meniscal tears. Design, Setting, and Participants: Noninferiority, multicenter, randomized clinical trial conducted in 9 hospitals in the Netherlands...
October 2, 2018: JAMA: the Journal of the American Medical Association
Laith Jazrawi, Heather T Gold, Joseph D Zuckerman
No abstract text is available yet for this article.
October 2, 2018: JAMA: the Journal of the American Medical Association
Sheng-Hao Wang, Wu-Chien Chien, Chi-Hsiang Chung, Yung-Chih Wang, Leou-Chyr Lin, Ru-Yu Pan
BACKGROUND: There is increasing interest in the long-term outcomes of patients with posterior cruciate ligament (PCL) tears following conservative treatment or reconstruction. However, limited information is available regarding these results because of the relative rarity of cases and lack of long-term follow-up. PURPOSE: The goals of this study are to (1) compare the occurrence of secondary meniscal tears, osteoarthritis (OA) or subsequent total knee replacement (TKR) in patients with or without PCL injury, and (2) evaluate the potential protective effect of PCL reconstruction against long-term sequela in patients with PCL deficiency...
2018: PloS One
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