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(Anterior cruciate ligament) AND imaging

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https://www.readbyqxmd.com/read/27928547/relationship-of-acl-injury-and-posterior-tibial-slope-with-patient-age-sex-and-race
#1
Alana Waiwaiole, Ajay Gurbani, Kambiz Motamedi, Leanne Seeger, Myung Shin Sim, Patricia Nwajuaku, Sharon L Hame
BACKGROUND: Posterior tibial slope (PTS) has been proposed as a potential risk factor for anterior cruciate ligament (ACL) injury; however, studies that have examined this relationship have provided inconclusive and sometimes contradictory results. Further characterization of this relationship may enable the medical community to identify individuals at greater risk for ACL injury and possibly characterize an anatomic target during surgical reconstruction. PURPOSE: The primary goal was to investigate the relationship between PTS and ACL injury...
November 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/27923624/a-novel-3d-approach-for-determination-of-frontal-and-coronal-plane-tibial-slopes-from-mr-imaging
#2
Amirhesam Amerinatanzi, Rodney Summers, Kaveh Ahmadi, Vijay K Goel, Timothy E Hewett, Edward Nyman
BACKGROUND: The proximal tibia is geometrically complex, asymmetrical, and variable, is heavily implicated in arthrokinematics of the knee joint, and thus a contributor to knee pathologies such as non-contact anterior cruciate ligament injury. Medial, lateral, and coronal tibial slopes are anatomic parameters that may increase predisposition to knee injuries, but the extent to which each contributes has yet to be fully realized. Previously, two-dimensional methods have quantified tibial slopes, but more reliable 3D methods may prove advantageous...
December 3, 2016: Knee
https://www.readbyqxmd.com/read/27918596/degeneration-in-acl-injured-knees-with-and-without-reconstruction-in-relation-to-muscle-size-and-fat-content-data-from-the-osteoarthritis-initiative
#3
Pia M Jungmann, Thomas Baum, Michael C Nevitt, Lorenzo Nardo, Alexandra S Gersing, Nancy E Lane, Charles E McCulloch, Ernst J Rummeny, Thomas M Link
BACKGROUND: Anterior cruciate ligaments (ACL) injuries represent a major risk factor for early osteoarthritis (OA). PURPOSE: To evaluate the prevalence and 4-year progression of knee OA measured with 3T MR-imaging in individuals with ruptured, reconstructed or normal ACL and to assess the impact of thigh muscle characteristics. METHODS: A total of 54 knees (23/54 male, 31/54 female) were recruited from the Osteoarthritis Initiative (OAI). At baseline, 15/54 subjects had prevalent ACL ruptures and 15/54 subjects had prevalent ACL reconstruction (24/54 normal ACL)...
2016: PloS One
https://www.readbyqxmd.com/read/27904222/functional-and-computed-tomography-correlation-of-femoral-and-tibial-tunnels-in-single-bundle-anterior-cruciate-ligament-reconstruction-use-of-accessory-anteromedial-portal
#4
Naveen Joseph Mathai, Rajkumar S Amaravathi, K V Pavan, Padmanabhan Sekaran, Gaurav Sharma, Belliappa Codanda
BACKGROUND: An accessory anteromedial portal (AAMP) has been shown to be effective in placing an anatomically ideal femoral tunnel. It is well known that this is due to the independent femoral drilling which is possible with the AAMP. However very little is known regarding the significance of this reconstruction technique in influencing the functional outcomes of anatomic anterior cruciate ligament reconstruction (ACLR). This study documents the influence of tibial and femoral tunnel positions on functional outcomes of anatomic ACLR using the AAMP...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27903590/anterior-cruciate-ligament-derived-stem-cells-transduced-with-bmp2-accelerate-graft-bone-integration-after-acl-reconstruction
#5
Yohei Kawakami, Koji Takayama, Tomoyuki Matsumoto, Ying Tang, Bing Wang, Yutaka Mifune, James H Cummins, Ryan J Warth, Ryosuke Kuroda, Masahiro Kurosaka, Freddie H Fu, Johnny Huard
BACKGROUND: Strong graft-bone integration is a prerequisite for successful graft remodeling after reconstruction of the anterior cruciate ligament (ACL) using soft tissue grafts. Novel strategies to accelerate soft tissue graft-bone integration are needed to reduce the need for bone-tendon-bone graft harvest, reduce patient convalescence, facilitate rehabilitation, and reduce total recovery time after ACL reconstruction. HYPOTHESIS: The application of ACL-derived stem cells with enhanced expression of bone morphogenetic protein 2 (BMP2) onto soft tissue grafts in the form of cell sheets will both accelerate and improve the quality of graft-bone integration after ACL reconstruction in a rat model...
November 30, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27900338/the-bridge-enhanced-anterior-cruciate-ligament-repair-bear-procedure-an-early-feasibility-cohort-study
#6
Martha M Murray, Brett M Flutie, Leslie A Kalish, Kirsten Ecklund, Braden C Fleming, Benedikt L Proffen, Lyle J Micheli
BACKGROUND: This study assessed the safety of the newly developed bridge-enhanced anterior cruciate ligament (ACL) repair (BEAR), which involves suture repair of the ligament combined with a bioactive scaffold to bridge the gap between the torn ligament ends. As the intra-articular environment is complex in its response to implanted materials, this study was designed to determine whether there would be a significant rate of adverse reaction to the implanted scaffold. HYPOTHESIS: The primary hypothesis was that the implanted scaffold would not result in a deep joint infection (arthrocentesis with positive culture) or significant inflammation (clinical symptoms justifying arthrocentesis but negative culture)...
November 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/27900295/diagnostic-performance-of-volume-and-limited-oblique-mri-of-the-anterior-cruciate-ligament-compared-to-knee-arthroscopy
#7
Paula J Richards, Iain McCall, Alexandra Kraus, Mary Jones, Gayle Maffulli, Stephen Bridgman, Nicola Maffulli
BACKGROUND: Many strategies have been used to improve the visualisation of the ACL including sagittal, coronal oblique sequences, and 3D volume imaging. Nevertheless, the ACL may not always be visualised. METHODS: Two hundred and thirty-one consecutive patients (77 females; 154 males; average age 43.5, range 18 to 82 years; 205 with chronic, 20 acute, and 6 acute on chronic symptoms) underwent knee arthroscopy for mechanical symptoms within a week of MRI. After routine orthogonal sequences, if general MRI radiographers, with over four years experience, were not able to identify the presence of the ACL, then two 3D volume sequences and 2D limited sagittal oblique T1 sequences were performed...
April 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/27900192/vertical-stiffness-is-not-related-to-anterior-cruciate-ligament-elongation-in-professional-rugby-union-players
#8
Benjamin G Serpell, Jennie M Scarvell, Mark R Pickering, Nick B Ball, Diana Perriman, John Warmenhoven, Paul N Smith
BACKGROUND: Novel research surrounding anterior cruciate ligament (ACL) injury is necessary because ACL injury rates have remained unchanged for several decades. An area of ACL risk mitigation which has not been well researched relates to vertical stiffness. The relationship between increased vertical stiffness and increased ground reaction force suggests that vertical stiffness may be related to ACL injury risk. However, given that increased dynamic knee joint stability has been shown to be associated with vertical stiffness, it is possible that modification of vertical stiffness could help to protect against injury...
2016: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/27899355/the-anatomic-centers-of-the-femoral-and-tibial-insertions-of-the-anterior-cruciate-ligament-a-systematic-review-of-imaging-and-cadaveric-studies-reporting-normal-center-locations
#9
Anagha P Parkar, Miraude E A P M Adriaensen, Søren Vindfeld, Eirik Solheim
BACKGROUND: The anterior cruciate ligament (ACL) is regularly reconstructed if knee joint function is impaired. Anatomic graft tunnel placement, often assessed with varying measurement methods, in the femur and tibia is considered important for an optimal clinical outcome. A consensus on the exact location of the femoral and tibial footprint centers is lacking. PURPOSE: To systematically review the literature regarding anatomic centers of the femoral and tibial ACL footprints and assess the mean, median, and percentiles of normal centers...
November 29, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27894180/causes-of-failure-of-anterior-cruciate-ligament-reconstruction-and-revision-surgical-strategies
#10
Paolo Di Benedetto, Enrico Di Benedetto, Andrea Fiocchi, Alessandro Beltrame, Araldo Causero
Purpose: Long-term outcomes of anterior cruciate ligament (ACL) reconstruction are good or excellent; however, 0.7%-20% of patients suffer from recurrent instability due to graft failure. The purpose of this paper was to analyse failure aetiology and the possibilities of revision surgical strategies, with a description of our experience. We obtained optimal and good results in most of our patients. Materials and Methods: We retrospectively reviewed 42 patients who underwent revision surgery (43 revisions) due to relapsing instability after ACL reconstruction between 2006 and 2015...
December 1, 2016: Knee Surgery & related Research
https://www.readbyqxmd.com/read/27888604/mri-depiction-and-3d-visualization-of-three-anterior-cruciate-ligament-bundles
#11
H Otsubo, Y Akatsuka, H Takashima, T Suzuki, D Suzuki, T Kamiya, Y Ikeda, T Matsumura, T Yamashita, K Shino
The anterior cruciate ligament (ACL) is divided into three fiber bundles (AM-M: anteromedial-medial, AM-L: anteromedial-lateral, PL: posterolateral). We attempted to depict the three bundles of the human ACL on MRI images and to obtain 3-dimensional visualization of them. Twenty-four knees of healthy volunteers (14 males, 10 females) were scanned by 3T-MRI using the fat suppression 3D coherent oscillatory state acquisition for the manipulation of imaging contrast (FS 3D-COSMIC). The scanned images were reconstructed after the isotropic voxel data, which allows the images to be reconstructed in any plane, was acquired...
November 26, 2016: Clinical Anatomy
https://www.readbyqxmd.com/read/27885289/assessment-of-knee-joint-injuries-with-low-field-strength-magnetic-resonance-imaging
#12
O B Panta, N P Neupane, S Songmen, G Gurung
BACKGROUND: Magnetic Resonance Imaging is an appropriate screening tool before therapeutic arthroscopy, making diagnostic arthroscopy unnecessary in most patients. This study aims to evaluate the MRI findings in knee injuries and diagnostic value of low Strength MRI for assessing Meniscal and cruciate ligament tear. METHODS: A cross sectional study was conducted on patients undergoing "Magnetic Resonance Imaging of the Knee" for injuries of the knee and excluded patients undergoing MRI for other causes, poor diagnostic quality MRI and post operative MRI...
May 2016: Journal of Nepal Health Research Council
https://www.readbyqxmd.com/read/27872126/multiple-ligament-reconstruction-femoral-tunnels-intertunnel-relationships-and-guidelines-to-avoid-convergence
#13
Gilbert Moatshe, Alex W Brady, Erik L Slette, Jorge Chahla, Travis Lee Turnbull, Lars Engebretsen, Robert F LaPrade
BACKGROUND: Knee dislocations often require multiple concurrent ligament reconstructions, which involve creating several tunnels in the distal femur. Therefore, the risk of tunnel convergence is increased because of the limited bone volume within the distal aspect of the femur. PURPOSE: To assess the risk of tunnel convergence and determine the optimal reconstruction tunnel orientations for multiple ligament reconstructions in the femur. STUDY DESIGN: Descriptive laboratory study...
November 21, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27871657/surgical-pearls-in-revision-anterior-cruciate-ligament-surgery-when-must-i-stage
#14
REVIEW
Dustin L Richter, Brian C Werner, Mark D Miller
Failed anterior cruciate ligament (ACL) reconstruction is a challenging clinical entity and revision ACL reconstruction is a technically challenging procedure. This article reviews the etiology of ACL failures, the need for appropriate examination and imaging studies, and discusses the technical considerations to allow for a successful revision reconstruction. Furthermore, we elaborate on the decision-making process of when a 2-stage revision is preferred to a single-stage revision.
January 2017: Clinics in Sports Medicine
https://www.readbyqxmd.com/read/27833408/postoperative-evaluation-after-anterior-cruciate-ligament-reconstruction-measurements-and-abnormalities-on-radiographic-and-ct-imaging
#15
Minchul Kim, Yun Sun Choi, Hyoungseop Kim, Nam-Hong Choi
Reconstruction of a ruptured anterior cruciate ligament (ACL) is a well-established procedure for repair of ACL injury. Despite improvement of surgical and rehabilitation techniques over the past decades, up to 25% of patients still fail to regain satisfactory function after an ACL reconstruction. With development of CT imaging techniques for reducing metal artifacts, multi-planar reconstruction, and three-dimensional reconstruction, early post-operative imaging is increasingly being used to provide immediate feedback to surgeons regarding tunnel positioning, fixation, and device placement...
November 2016: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/27820852/osteoarthritis-in-the-knee-joints-of-g%C3%A3-ttingen-minipigs-after-resection-of-the-anterior-cruciate-ligament-missing-correlation-of-mri-gene-and-protein-expression-with-histological-scoring
#16
Gregor Reisig, Michael Kreinest, Wiltrud Richter, Mechthild Wagner-Ecker, Dietmar Dinter, Ulrike Attenberger, Barbara Schneider-Wald, Stefan Fickert, Markus L Schwarz
INTRODUCTION: The Göttingen Minipig (GM) is used as large animal model in articular cartilage research. The aim of the study was to introduce osteoarthritis (OA) in the GM by resecting the anterior cruciate ligament (ACLR) according to Pond and Nuki, verified by histological and magnetic resonance imaging (MRI) scoring as well as analysis of gene and protein expression. MATERIALS AND METHODS: The eight included skeletally mature female GM were assessed after ACLR in the left and a sham operation in the right knee, which served as control...
2016: PloS One
https://www.readbyqxmd.com/read/27817301/neuroplasticity-associated-with-anterior-cruciate-ligament-reconstruction
#17
Dustin R Grooms, Stephen J Page, Deborah S Nichols-Larsen, Ajit M W Chaudhari, Susan E White, James A Onate
Study Design Controlled laboratory study. Background Anterior cruciate ligament (ACL) injury may result in neuroplastic changes due to lost mechanoreceptors of the ACL and compensations in neuromuscular control. These alterations are not completely understood. Assessing brain function after ACL injury and reconstruction with functional magnetic resonance imaging (fMRI), provides a means to address this gap in knowledge. Objective To investigate brain activation differences during knee flexion/extension in persons who have undergone ACL reconstruction (ACLR) and matched controls...
November 5, 2016: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/27810428/correlation-between-a-2d-simple-image-analysis-method-and-3d-bony-motion-during-the-pivot-shift-test
#18
Fabio V Arilla, Amir Ata Rahnemai-Azar, Carlos Yacuzzi, Daniel Guenther, Benjamin S Engel, Freddie H Fu, Volker Musahl, Richard E Debski
BACKGROUND: The pivot shift test is the most specific clinical test to detect anterior cruciate ligament injury. The purpose of this study was to determine the correlation between the 2D simple image analysis method and the 3D bony motion of the knee during the pivot shift test and assess the intra- and inter-examiner agreements. METHODS: Three orthopedic surgeons performed three trials of the standardized pivot shift test in seven knees. Two devices were used to measure motion of the lateral knee compartment simultaneously: 1) 2D simple image analysis method: translation was determined using a tablet computer with custom motion tracking software that quantified movement of three markers attached to skin over bony landmarks; 2) 3D bony motion: electromagnetic tracking system was used to measure movement of the same bony landmarks...
December 2016: Knee
https://www.readbyqxmd.com/read/27806877/does-the-tibial-remnant-of-the-anterior-cruciate-ligament-promote-ligamentization
#19
Byung Ill Lee, Byoung Min Kim, Duk Hwan Kho, Sai Won Kwon, Hyeung June Kim, Hyun Ryong Hwang
BACKGROUND: The purpose of this study was to clarify the difference in ligamentization between the remnant-preserving (RP) and remnant-sacrificing (RS) techniques in anterior cruciate ligament (ACL) reconstruction using magnetic resonance imaging (MRI). METHODS: A retrospective comparative study was carried out on 98 patients undergoing ACL reconstruction using either an RP (n=56) or RS (n=42) technique. MRI was performed at one of four time points postoperatively, and the signal intensity of the ACL graft was analyzed using the signal to noise quotient (SNQ) ratio and inter-bundle high signal intensity, along with an analysis of the survival rate of remnant tissue...
December 2016: Knee
https://www.readbyqxmd.com/read/27795945/magnetic-resonance-imaging-after-anterior-cruciate-ligament-reconstruction-a-practical-guide
#20
REVIEW
Alberto Grassi, James R Bailey, Cecilia Signorelli, Giuseppe Carbone, Andy Tchonang Wakam, Gian Andrea Lucidi, Stefano Zaffagnini
Anterior cruciate ligament (ACL) reconstruction is one of the most common orthopedic procedures performed worldwide. In this regard, magnetic resonance imaging (MRI) represents a useful pre-operative tool to confirm a disruption of the ACL and to assess for potential associated injuries. However, MRI is also valuable post-operatively, as it is able to identify, in a non-invasive way, a number of aspects and situations that could suggest potential problems to clinicians. Graft signal and integrity, correct tunnel placement, tunnel widening, and problems with fixation devices or the donor site could all compromise the surgical outcomes and potentially predict the failure of the ACL reconstruction...
October 18, 2016: World Journal of Orthopedics
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