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(Anterior cruciate ligament) AND imaging

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https://www.readbyqxmd.com/read/29679117/the-infrapatellar-fat-pad-is-a-dynamic-and-mobile-structure-which-deforms-during-knee-motion-and-has-proximal-extensions-which-wrap-around-the-patella
#1
Joanna M Stephen, Ran Sopher, Sebastian Tullie, Andrew A Amis, Simon Ball, Andy Williams
PURPOSE: The infrapatellar fat pad (IFP) is a common cause of knee pain and loss of knee flexion and extension. However, its anatomy and behavior are not consistently defined. METHODS: Thirty-six unpaired fresh frozen knees (median age 34 years, range 21-68) were dissected, and IFP attachments and volume measured. The rectus femoris was elevated, suprapatellar pouch opened and videos recorded looking inferiorly along the femoral shaft at the IFP as the knee was flexed...
April 20, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29678623/differences-in-subchondral-bone-plate-and-cartilage-thickness-between-women-with-anterior-cruciate-ligament-reconstructions-and-uninjured-controls
#2
Jennifer L Bhatla, Andres Kroker, Sarah L Manske, Carolyn A Emery, Steven K Boyd
OBJECTIVE: Anterior cruciate ligament (ACL) tears increase early onset osteoarthritis (OA) risk leading to cartilage and bone degradation. While the contribution of bone in OA development is unclear, evidence suggests that bone changes accompany cartilage degradation. This study aims to assess if regions with differences in subchondral bone plate thickness have differences in cartilage thickness when comparing ACL reconstructed (ACLR) knees of women ≥5 years post-injury to contralateral and controls with uninjured knees...
April 17, 2018: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/29667852/determination-of-the-position-of-the-knee-at-the-time-of-an-anterior-cruciate-ligament-rupture-for-male-versus-female-patients-by-an-analysis-of-bone-bruises
#3
Kwadwo A Owusu-Akyaw, Sophia Y Kim, Charles E Spritzer, Amber T Collins, Zoë A Englander, Gangadhar M Utturkar, William E Garrett, Louis E DeFrate
BACKGROUND: The incidence of anterior cruciate ligament (ACL) ruptures is 2 to 4 times higher in female athletes as compared with their male counterparts. As a result, a number of recent studies have addressed the hypothesis that female and male patients sustain ACL injuries via different mechanisms. The efficacy of prevention programs may be improved by a better understanding of whether there are differences in the injury mechanism between sexes. Hypothesis/Purpose: To compare knee positions at the time of a noncontact ACL injury between sexes...
April 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29663013/bone-to-bone-integrations-were-complete-within-5-months-after-anatomical-rectangular-tunnel-anterior-cruciate-ligament-reconstruction-using-a-bone-patellar-tendon-bone-graft
#4
Hironari Masuda, Shuji Taketomi, Hiroshi Inui, Naoya Shimazaki, Nobuhiro Nishihara, Seikai Toyooka, Hirotaka Kawano, Takumi Nakagawa
PURPOSE: Anterior cruciate ligament (ACL) reconstruction using a bone-patellar tendon-bone (BTB) graft is known to provide secure fixation due to the direct bone-to-bone integration of the bone plug and bone tunnel. It is important to know the time required for bone integration when designing the postoperative rehabilitation protocol or deciding when the patient can return to competition-level activity, especially if the patient is an athlete. However, because reports are scarce, the period necessary for bone-to-bone integration after ACL reconstruction using a BTB graft remains unclear...
April 16, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29662913/high-rate-of-missed-lateral-meniscus-posterior-root-tears-on-preoperative-magnetic-resonance-imaging
#5
Aaron J Krych, Isabella T Wu, Vishal S Desai, Naveen S Murthy, Mark S Collins, Daniel B F Saris, Bruce A Levy, Michael J Stuart
Background: Lateral meniscus posterior root tears (LMPRTs), if left untreated, can cause devastating effects to the knee, with rapid articular cartilage degeneration and loss of the meniscus as a secondary stabilizer. Detection and surgical repair of these defects have been linked to favorable outcomes, but preoperative identification of LMPRTs continues to be challenging. Purpose: To determine the rate of LMPRTs diagnosed preoperatively on magnetic resonance imaging (MRI) in a consecutive series of arthroscopically confirmed LMPRTs...
April 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29662782/quantitative-analysis-of-t2-relaxation-times-of-the-patellofemoral-joint-cartilage-3-years-after-anterior-cruciate-ligament-reconstruction
#6
Chang-Wan Kim, Ali Hosseini, Lin Lin, Yang Wang, Martin Torriani, Thomas Gill, Alan J Grodzinsky, Guoan Li
Objective: To evaluate patient-specific patellofemoral joint (PFJ) cartilage 3 years postoperatively using T2 mapping magnetic resonance imaging and the uninjured contralateral side as control. Hypothesis: The cartilage of the PFJ in the anterior cruciate ligament (ACL) reconstructed knees would show increased T2 values compared to the uninjured contralateral knees at 3-year follow-up, and the femoral (trochlear) cartilage would be more susceptible than the patella in degeneration in ACL-reconstructed knees...
January 2018: Journal of Orthopaedic Translation
https://www.readbyqxmd.com/read/29657483/imaging-the-anterior-cruciate-ligament-points-to-ponder
#7
EDITORIAL
P Gopinathan
No abstract text is available yet for this article.
March 2018: Journal of Orthopaedics
https://www.readbyqxmd.com/read/29656239/mechanical-alterations-of-the-bone-cartilage-unit-in-a-rabbit-model-of-early-osteoarthrosis
#8
Sarah Pragnère, Caroline Boulocher, Ophélie Pollet, Catherine Bosser, Aurélie Levillain, Magali Cruel, Thierry Hoc
OBJECTIVE: The purpose of this study was to assess mechanical properties along with microstructural modifications of the hyaline cartilage (HC), calcified cartilage (CC) and cortical plate (Ct.Pt), in an anterior cruciate ligament transection (ACLT) model. Medial femoral condyles of six healthy rabbits (control group) and of six ACLT rabbits 6 weeks after OA induction were explanted. The zone of interest (ZOI) for all experiments was defined as the weight bearing areas of the samples...
April 3, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29614621/three-dimensional-finite-element-analysis-of-the-influence-of-posterior-tibial-slope-on-the-anterior-cruciate-ligament-and-knee-joint-forward-stability
#9
Yong Qi, Hongtao Sun, Yueguang Fan, Feimeng Li, Yunting Wang, Chana Ge
OBJECTIVE: To explore the biomechanical influence of posterior tibial angle on the anterior cruciate ligament and knee joint forward stability. METHODS: The left knee joint of a healthy volunteer was scanned by CT and MRI. The data were imported into Mimics software to obtain 3D models of bone, cartilage, meniscus and ligament structures, and then Geomagic software was used to modify of the image. The relative displacement between tibia and femur and the stress of ACL were recorded...
March 23, 2018: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/29613816/anterior-cruciate-ligament-reconstruction-affects-tibiofemoral-joint-congruency-during-dynamic-functional-movement
#10
Kanto Nagai, Tom Gale, James J Irrgang, Scott Tashman, Freddie H Fu, William Anderst
BACKGROUND: Anterior cruciate ligament reconstruction (ACLR) has been shown to alter kinematics, which may influence dynamic tibiofemoral joint congruency (a measure of how well the bone surfaces fit together). This may lead to abnormal loading of cartilage and joint degeneration. However, joint congruency after ACLR has never been investigated. HYPOTHESES: The ACLR knee will be more congruent than the contralateral uninjured knee, and dynamic congruency will increase over time after ACLR...
April 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29600679/-diagnostic-value-of-mri-for-posterior-root-tear-of-medial-and-lateral-meniscus
#11
Yue-Nan Qian, Fang Liu, Yi-Long Dong, Chun-Yuan Cai
OBJECTIVE: To explore diagnostic value of MRI on posterior root tear of medial and lateral meniscus. METHODS: From January 2012 to January 2016, clinical data of 43 patients with meniscal posterior root tear confirmed by arthroscopy were retrospective analyzed, including 25 males and 18 females, aged from 27 to 69 years old with an average age of(42.5±8.3)years old;27 cases on the right side and 16 cases on the left side. MRI examinations of 43 patients with tear of posterior meniscus root confirmed by knee arthroscopies were retrospectively reviewed...
March 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29589954/validation-of-an-mri-protocol-for-routine-quantitative-assessment-of-tunnel-position-in-anterior-cruciate-ligament-reconstruction
#12
Samuel Grasso, James Linklater, Qing Li, David A Parker
BACKGROUND: No standardized methodology and objective criteria currently exist to accurately and objectively assess tunnel placement and consequent graft orientation in anterior cruciate ligament (ACL) reconstruction (ACLR) through a single imaging modality. Advances in magnetic resonance imaging (MRI) technology have enabled the use of volumetric high spatial and contrast resolution proton density-weighted sequencing, which allows precise delineation of graft orientation, tunnel position, and quantitative assessment of tunnel position relationship to adjacent reproducible anatomic landmarks...
March 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29589162/the-capsular-line-reference-a-new-arthroscopic-reference-for-posterior-anterior-femoral-tunnel-positioning-in-anterior-cruciate-ligament-reconstruction
#13
Philippe Colombet, Alain Silvestre, Nicolas Bouguennec
BACKGROUND: Femoral malposition is the first cause for graft rupture during ACL reconstruction. Arthroscopic landmarks can be difficult to identify. So, landmark has to be found for reliable tunnel placement. A proximal-distal reference was described as "Apex reference" reported by Hart et al. but no posterior/anterior reference exists in the literature. The purpose of this study was to do a 3D CT-scan assessment of the femoral tunnel positioning using the Capsular Line Reference (CLR) as a landmark for posterior/anterior placement in ACL reconstruction...
March 27, 2018: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/29588914/association-of-acl-laxity-tests-with-arthroscopic-findings-in-chronic-acl-and-pcl-deficient-knees
#14
S Sazali, A Rusdi, H T Siti
An anterior cruciate ligament (ACL) injury may be diagnosed by clinical examination and radiological investigation using magnetic resonance imaging or by arthroscopy.1,2 Based on our experience, the ACL tear in concomitant chronic ACL and posterior cruciate ligament (PCL) deficient knees may produce knee laxity, which is more difficult to assess on clinical examination, which in turn may affect the management algorithm of the patient. Our hypothesis is that, in a concomitant chronic ACL and PCL injury, posterior capsular contracture and abnormal reattachment of torn ACL will result in less clinical and subjective laxity, preoperatively...
January 2018: Surgery Journal
https://www.readbyqxmd.com/read/29578774/greater-static-anterior-tibial-subluxation-of-the-lateral-compartment-after-an-acute-anterior-cruciate-ligament-injury-is-associated-with-an-increased-posterior-tibial-slope
#15
Guan-Yang Song, Hui Zhang, Jin Zhang, Xin Liu, Zhe Xue, Yi Qian, Hua Feng
BACKGROUND: Static anterior tibial subluxation of the lateral compartment after an anterior cruciate ligament (ACL) injury highlights an increased anterior position of the tibia relative to the femur. However, the precise cause of this phenomenon is not entirely clear. Recently, an increased posterior tibial slope (PTS) has been identified as an independent risk factor for noncontact ACL injuries. HYPOTHESIS: An increased PTS is associated with an increased anterior position of the lateral compartment of the tibia relative to the femur after acute ACL injuries...
March 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29561460/spinal-dysraphism-and-dislocated-hip-beware-of-anomalous-sciatic-nerve-through-ilium-a-case-report
#16
Amanda T Whitaker, James Kasser, Young-Jo Kim
RATIONALE: The sciatic nerve runs a predictable course combining L4-S3 nerve roots through the true pelvis and under the greater sciatic notch. There are reports of bony protuberances from the sacrum and ilium in cases of spinal dysraphism; however advanced imaging, treatment, or outcomes are not described. There are no cases with associated fibular hemimelia in the current literature. PATIENT CONCERNS: This is a 4-year-old girl with tethered cord, acetabular dysplasia with hip subluxation, congenital short femur, anterior cruciate ligament (ACL) deficiency, and fibular hemimelia with her sciatic nerve coursing through the ilium...
March 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29552465/how-to-test-the-anterolateral-ligament-with-ultrasound
#17
Etienne Cavaignac, Gregoire Laumond, Nicolas Reina, Karine Wytrykowski, Jérôme Murgier, Marie Faruch, Philippe Chiron
Ultrasonography (US) is a nonirradiating, low-cost, real-time imaging modality that has very good spatial resolution. US can be used to view the anterolateral ligament (ALL) and injuries to the ALL. Several authors have sought to analyze the anterolateral aspect of the knee using US with varying luck. All of them analyzed the ALL statically only. The goal of this Technical Note is to describe in detail the technique that we use to analyze the anterolateral aspect of the knee in patients with an anterior cruciate ligament tear...
January 2018: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29536687/-analysis-of-the-characteristics-and-clinical-diagnosis-and-treatment-of-avulsion-fracture-of-the-lateral-edge-of-tibial-plateau
#18
Jia-Ping Pan, Xu-Can Wang, Ming-Hong Huang
OBJECTIVE: To investigate the characteristics and clinical treatment of avulsion fracture of the lateral edge of tibial plateau(segond fracture) in knee joint injuries. METHODS: From January 2011 and December 2015, 29 patients with Segond fracture were treated with minimally invasive arthroscopy technology in intra-articular injuries combined with double anchor nail fixation in avulsion fracture of the lateral edge of tibial plateau, including 17 males and 12 females with an average age of 41 years old ranging from 27 to 62 years old...
February 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29534754/early-detection-of-osteoarthritis-in-rabbits-using-mri-with-a-double-contrast-agent
#19
Okihiro Onishi, Kazuya Ikoma, Masamitsu Kido, Yukichi Kabuto, Keiichiro Ueshima, Ken-Ichi Matsuda, Masaki Tanaka, Toshikazu Kubo
BACKGROUND: Articular cartilage degeneration has been evaluated by magnetic resonance imaging (MRI). However, this method has several problems, including its time-consuming nature and the requirement of a high magnetic field or specialized hardware. The purpose of this study was to sequentially assess early degenerative changes in rabbit knee articular cartilage using MRI with a new double-contrast agent. METHODS: We induced osteoarthritis (OA) in the right knee of rabbits by anterior cruciate ligament transection and partial medial meniscectomy...
March 13, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29534084/development-and-characterization-of-various-osteoarthritis-models-for-tissue-engineering
#20
Ji Eun Kim, Da-Hyun Song, Soo Hyun Kim, Youngmee Jung, Sang Jun Kim
Osteoarthritis (OA) is characterized by a progressive loss of articular cartilage, subchondral bone sclerosis and synovial inflammation and is the most common chronic condition worldwide today. However, most treatments have focused on pain relief and OA symptoms. For these reasons, many ongoing studies are currently trying to develop efficient and successful therapies based on its pathology. Animal models that mimic the histopathology and symptoms of OA have a critical role in OA research and make it possible to investigate both secondary osteoarthritic changes due to a precedent event such as traumatic injury and naturally occurring changes for the development of therapeutics which can be tested in preclinical and clinical OA trials...
2018: PloS One
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