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Ligament cruciate anterior

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https://www.readbyqxmd.com/read/29668032/presence-of-meniscus-tear-alters-gene-expression-profile-of-anterior-cruciate-ligament-tears
#1
Robert H Brophy, Marcus A Rothermich, Eric D Tycksen, Lei Cai, Muhammad Farooq Rai
Anterior cruciate ligament (ACL) tears occur in isolation or in tandem with other intra-articular injuries such as meniscus tears. The impact of injury pattern on the molecular biology of the injured ACL is unknown. Here, we tested the hypothesis that the biological response of the ACL to injury varies based on the presence or absence of concomitant meniscus tear. We performed RNA-seq on 28 ACL tears remnants (12 isolated, 16 combined). In total, 16,654 transcripts were differentially-expressed between isolated and combined injury groups at false-discovery-rate of 0...
April 18, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
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
#2
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/29667429/quadriceps-function-knee-pain-and-self-reported-outcomes-in-patients-with-anterior-cruciate-ligament-reconstruction
#3
Adam S Lepley, Brian Pietrosimone, Marc L Cormier
CONTEXT:   Interactions among muscle strength, pain, and self-reported outcomes in patients with anterior cruciate ligament reconstruction (ACLR) are not well understood. Clarifying these interactions is of clinical importance because improving physical and psychological function is thought to optimize outcomes after ACLR. OBJECTIVE:   To examine the relationships among neuromuscular quadriceps function, pain, self-reported knee function, readiness to return to activity, and emotional response to injury both before and after ACLR...
April 18, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29666029/modern-day-bicruciate-retaining-total-knee-arthroplasty-a-short-term-review-of-146-knees
#4
Omar K Alnachoukati, Roger H Emerson, Elizabeth Diaz, Emily Ruchaud, Kwame A Ennin
BACKGROUND: Bicruciate retaining (BCR) implants were first proposed in the 1960s with the polycentric knee. Given the technical difficulty of implanting these devices, and the mixed results at the time, the BCR concept had stalled, until recently. This study seeks to provide a short-term review of the BCR implant design, describe patient-reported outcomes, and discuss key aspects to ensure successful implantation of the modern-day BCR implant design. METHODS: Between October 2014 and December 2016, the senior author performed 146 primary total knee arthroplasties using BCR implants...
March 17, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29665801/an-extended-opensim-knee-model-for-analysis-of-strains-of-connective-tissues
#5
M Marieswaran, Arnab Sikidar, Anu Goel, Deepak Joshi, Dinesh Kalyanasundaram
BACKGROUND: OpenSim musculoskeletal models provide an accurate simulation environment that eases limitations of in vivo and in vitro studies. In this work, a biomechanical knee model was formulated with femoral articular cartilages and menisci along with 25 connective tissue bundles representing ligaments and capsules. The strain patterns of the connective tissues in the presence of femoral articular cartilage and menisci in the OpenSim knee model was probed in a first of its kind study...
April 17, 2018: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29665604/-foreign-material-free-anterior-cruciate-ligament-repair-with-hamstring-graft-felmet-technique
#6
Marc Chmielnicki, Wolfram Siebert, Axel Prokop
Rupture of the anterior cruciate ligament (ACL) is a common sports injury. Shear forces can damage the articular cartilage and lead to early osteoarthritis. Ligamentary stabilisation of the knee is necessary. Today, arthroscopic ACL repair is a standard knee procedure. Transplant fixation is often performed using implants, e.g. interference screws. The foreign material-free procedure using the Felmet technique enables biological, mechanically stable fixation of the hamstring tendon graft. We demonstrate the surgical technique, including meniscus suture and a video case study...
April 2018: Zeitschrift Für Orthopädie und Unfallchirurgie
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
#7
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/29662914/ligament-strain-response-between-lower-extremity-contralateral-pairs-during-in-vitro-landing-simulation
#8
April L McPherson, Nathanial A Bates, Nathan D Schilaty, Christopher V Nagelli, Aaron J Krych, Timothy E Hewett
Background: Limb asymmetries, as determined through in vivo biomechanical measures, are known risk factors for anterior cruciate ligament (ACL) injury. Previous cadaveric studies have shown a lack of significant differences in ligament strain between contralateral lower extremities when identical kinematics were simulated on specimens. Recent methodological developments have applied in vivo knee kinetics to exert landing forces on cadaveric lower extremities to mimic ACL injury events, but it is unknown whether contralateral limbs fail in a consistent manner during impact simulator testing...
April 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29662913/high-rate-of-missed-lateral-meniscus-posterior-root-tears-on-preoperative-magnetic-resonance-imaging
#9
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/29662910/outcomes-and-return-to-sport-after-revision-anterior-cruciate-ligament-reconstruction-in-adolescent-athletes
#10
Michael Saper, Stephanie Pearce, Joseph Shung, Robert Zondervan, Roger Ostrander, James R Andrews
Background: The number of adolescent anterior cruciate ligament (ACL) injuries is rising with increased participation in higher level athletics at earlier ages. With an increasing number of primary ACL reconstructions (ACLRs) comes a rise in the incidence of revision ACLRs. Purpose: To evaluate the clinical results of revision ACLR across a group of high-level adolescent athletes with at least 2-year follow-up. Study Design: Case series; Level of evidence, 4...
April 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29662909/development-and-validation-of-a-short-version-of-the-anterior-cruciate-ligament-return-to-sport-after-injury-acl-rsi-scale
#11
Kate E Webster, Julian A Feller
Background: The Anterior Cruciate Ligament Return to Sport After Injury (ACL-RSI) scale was developed to measure an athlete's psychological readiness to return to sport after anterior cruciate ligament (ACL) injury and reconstruction surgery. The scale is being used with increasing frequency in both research and clinical settings. Purpose: To generate and validate a short version of the ACL-RSI scale. Study Design: Cohort study (diagnosis); Level of evidence, 2...
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
#12
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/29659299/low-1-year-return-to-sport-rate-after-anterior-cruciate-ligament-reconstruction-regardless-of-patient-and-surgical-factors-a-prospective-cohort-study-of-272-patients
#13
Eric Hamrin Senorski, Eleonor Svantesson, Susanne Beischer, Christoffer Thomeé, Roland Thomeé, Jón Karlsson, Kristian Samuelsson
BACKGROUND: There is insufficient knowledge about the way that concomitant injuries affect the short-term likelihood of a return to a knee-strenuous sport after anterior cruciate ligament (ACL) reconstruction. Hypotheses/Purpose: The purpose was to study whether patient characteristics, concomitant injuries, and graft choice at primary ACL reconstruction can predict return to sport (RTS) 1 year after surgery. The hypotheses were that younger age at the time of ACL reconstruction would positively affect RTS, while the presence of concomitant injuries would negatively affect RTS 1 year after surgery...
April 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29658518/stabilometric-indicators-as-an-element-of-verifying-rehabilitation-of-patients-before-and-after-reconstruction-of-anterior-cruciate-ligament
#14
Katarzyna Ogrodzka-Ciechanowicz, Dorota Czechowska, Wiesław Chwała, Jakub Ślusarski, Artur Gądek
PURPOSE: The aim of the study was to evaluate effectiveness of rehabilitation in patients before and after rACL, based on stabilographic indicators. METHODS: The research group was comprised of 31 men aged 20-57 with anterior cruciate ligament injury, qualified for reconstruction surgery. A measurement of static stabilometric indicators and muscle strength was taken twice for each patient - before surgery and after 6 months. To assess stabilographic indicators the stabilographic platform was used and to asses muscle strength a dynamometer was used...
2018: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/29657850/hamstring-autograft-size-importance-in-anterior-cruciate-ligament-repair-surgery
#15
Francisco Figueroa, David Figueroa, João Espregueira-Mendes
Graft size in hamstring autograft anterior cruciate ligament (ACL) surgery is an important factor directly related to failure. Most of the evidence in the field suggests that the size of the graft in hamstring autograft ACL reconstruction matters when the surgeon is trying to avoid failures.The exact graft diameter needed to avoid failures is not absolutely clear and could depend on other factors, but newer studies suggest than even increases of 0.5 mm up to a graft size of 10 mm are beneficial for the patient...
March 2018: EFORT Open Reviews
https://www.readbyqxmd.com/read/29657483/imaging-the-anterior-cruciate-ligament-points-to-ponder
#16
EDITORIAL
P Gopinathan
No abstract text is available yet for this article.
March 2018: Journal of Orthopaedics
https://www.readbyqxmd.com/read/29656302/anterior-laxity-of-the-knee-assessed-with-gravity-stress-radiograph
#17
Tatsuo Mae, Konsei Shino, Kunihiko Hiramatsu, Yuta Tachibana, Shigeto Nakagawa, Hideki Yoshikawa
OBJECTIVE: To clarify the advantage of prone position over supine position in radiographically-demonstrating anterior knee laxity measurement for anterior cruciate ligament (ACL) injury, and to optimize the radiographic technique for the ACL-deficient knees in a clinical setting. MATERIALS AND METHODS: Thirty-nine patients with unilateral ACL injury had consented to participate in this study. They were divided into two groups and subjected to the different radiographic evaluations: study 1 (20 patients); supine versus prone position with knee full-extended, and study 2 (19 patients); comparison of (1) prone position with knee full-extended (FPV), (2) prone position with knee flexed at 15° (AGV), and (3) supine position with calf put on a board at 15° of knee flexion (SGV)...
April 14, 2018: Skeletal Radiology
https://www.readbyqxmd.com/read/29656239/mechanical-alterations-of-the-bone-cartilage-unit-in-a-rabbit-model-of-early-osteoarthrosis
#18
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/29655901/in-vivo-heterotopic-culturing-of-prefabricated-tendon-grafts-with-mechanical-stimulation-in-a-sheep-model
#19
M Petri, P Lu, M Omar, M Ettinger, C Krettek, C Neunaber, M Jagodzinski
BACKGROUND: The goal of this study is to investigate the biomechanical and histological properties of in vivo heterotopically prefabricated cruciate ligament replacement grafts with and without mechanical stimulation. The clinical goal is to heterotopically prefabricate a bone-tendon-bone graft for anterior cruciate ligament reconstruction, which allows rapid ingrowth and early full weight bearing. METHODS: In a sheep model, eight quadriceps tendon grafts were harvested and introduced into culture chambers at their proximal and distal ends...
April 11, 2018: Knee
https://www.readbyqxmd.com/read/29655591/open-reduction-and-internal-fixation-in-a-one-stage-anterior-cruciate-ligament-reconstruction-surgery-for-the-treatment-of-tibial-plateau-fractures-a-case-report-and-literature-review
#20
Yiqun Wang, Lianyou Wang, Tongtong Zhu, Zhongguo Liu, Guangyao Liu
Treatment of tibial plateau fractures associated with anterior cruciate ligament (ACL) injuries can be challenging. Maintaining the joint surface and axis are two main principles for the management of patients with tibial plateau fractures. Herein, we describe a patient with tibial plateau fracture of Schatzker type VI associated with complete ACL rupture. Although in a two-stage reconstruction surgery for treatment of its rupture seem to be accepted by most orthopaedic surgeons in cases of ACL injuries, we treated our patient with ORIF in a one-stage ACL reconstruction surgery...
March 15, 2018: Injury
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