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ACL reconstruction and biomechanics

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https://www.readbyqxmd.com/read/28224442/report-of-the-primary-outcomes-for-gait-mechanics-in-men-of-the-acl-sports-trial-secondary-prevention-with-and-without-perturbation-training-does-not-restore-gait-symmetry-in-men-1-or-2-years-after-acl-reconstruction
#1
Jacob John Capin, Ryan Zarzycki, Amelia Arundale, Kathleen Cummer, Lynn Snyder-Mackler
BACKGROUND: Movement asymmetries during walking are common after anterior cruciate ligament (ACL) injury and reconstruction and may influence the early development of posttraumatic osteoarthritis. Preoperative neuromuscular training (like perturbation training, which is neuromuscular training requiring selective muscle activation in response to surface perturbations) improves gait asymmetries and functional outcomes among people who are ACL-deficient, but the effect of postoperative perturbation training on gait mechanics after ACL reconstruction is unknown...
February 21, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28224072/concomitant-arthroscopic-meniscal-allograft-transplantation-and-anterior-cruciate-ligament-reconstruction
#2
Bryan M Saltzman, Justin W Griffin, Nathan Wetters, Maximilian A Meyer, Brian J Cole, Adam B Yanke
In recent decades, arthroscopic meniscal allograft transplantation (MAT) has been refined as a robust option for the treatment of evolving unicompartmental tibiofemoral arthrosis in the setting of meniscal deficiency. It is imperative that the MAT be performed in a knee with anatomic stability and alignment to reduce aberrant biomechanical forces experienced by the allograft tissue to maintain its durability. Thus, in an anterior cruciate ligament (ACL)-deficient knee, ACL reconstruction (ACLR) must be performed to restore the stable knee environment for the MAT to succeed...
October 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28220268/anterolateral-ligament-expert-group-consensus-paper-on-the-management-of-internal-rotation-and-instability-of-the-anterior-cruciate-ligament-deficient-knee
#3
REVIEW
Bertrand Sonnery-Cottet, Matthew Daggett, Jean-Marie Fayard, Andrea Ferretti, Camilo Partezani Helito, Martin Lind, Edoardo Monaco, Vitor Barion Castro de Pádua, Mathieu Thaunat, Adrian Wilson, Stefano Zaffagnini, Jacco Zijl, Steven Claes
Purpose of this paper is to provide an overview of the latest research on the anterolateral ligament (ALL) and present the consensus of the ALL Expert Group on the anatomy, radiographic landmarks, biomechanics, clinical and radiographic diagnosis, lesion classification, surgical technique and clinical outcomes. A consensus on controversial subjects surrounding the ALL and anterolateral knee instability has been established based on the opinion of experts, the latest publications on the subject and an exchange of experiences during the ALL Experts Meeting (November 2015, Lyon, France)...
February 20, 2017: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/28219088/single-bundle-versus-double-bundle-anterior-cruciate-ligament-reconstruction-a-prospective-randomized-controlled-trial-with-6-year-follow-up
#4
Paolo Adravanti, Francesco Dini, Laura de Girolamo, Massimo Cattani, Michele Attilio Rosa
Single-bundle (SB) anterior cruciate ligament (ACL) reconstruction is increasingly used in a large number of patients and it allows obtaining very good clinical and subjective results; however, functional tests show a persistent rotational instability. Biomechanical studies seem to indicate that double-bundle (DB) ACL reconstruction allows to obtain increased anterior and rotational stability compared with SB. The aim of this prospective randomized controlled study was to compare the clinical outcome and the possible osteoarthritic evolution of patients treated either with a SB (freehand transtibial femoral tunnel) or with a DB technique (outside-in for posterolateral femoral tunnel/inside-out for anteromedial femoral tunnel) at a final follow-up of 6 years...
February 20, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28214894/mechanical-loading-improves-tendon-bone-healing-in-a-rabbit-anterior-cruciate-ligament-reconstruction-model-by-promoting-proliferation-and-matrix-formation-of-mesenchymal-stem-cells-and-tendon-cells
#5
Fanglong Song, Dawei Jiang, Tianchen Wang, Yi Wang, Fengmei Chen, Guoxing Xu, Yifan Kang, Yinquan Zhang
BACKGROUND/AIMS: This study investigated the effect of mechanical stress on tendon-bone healing in a rabbit anterior cruciate ligament (ACL) reconstruction model as well as cell proliferation and matrix formation in co-culture of bone-marrow mesenchymal stem cells (BMSCs) and tendon cells (TCs). METHODS: The effect of continuous passive motion (CPM) therapy on tendon-bone healing in a rabbit ACL reconstruction model was evaluated by histological analysis, biomechanical testing and gene expressions at the tendon-bone interface...
February 16, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214835/up-regulation-of-tgf-%C3%AE-promotes-tendon-to-bone-healing-after-anterior-cruciate-ligament-reconstruction-using-bone-marrow-derived-mesenchymal-stem-cells-through-the-tgf-%C3%AE-mapk-signaling-pathway-in-a-new-zealand-white-rabbit-model
#6
Rui Wang, Bin Xu, Hong-Gang Xu
BACKGROUND/AIMS: This study aimed to explore the role of TGF-β in tendon-to-bone healing after anterior cruciate ligament (ACL) reconstruction using bone marrow-derived mesenchymal stem cells (BMSCs) through the TGF-β/MAPK signaling pathway in a New Zealand white rabbit model. METHODS: A total of 72 healthy male New Zealand white rabbits were selected for these experiments. Flow cytometry and immunofluorescence were used to detect the expression of BMSC surface markers, and qRT-PCR was performed to detect TGF-β mRNA expression...
January 20, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28211291/a-biomechanical-analysis-of-tibial-acl-reconstruction-with-graft-length-mismatch
#7
Evan B Gaines, Diana Lau, Qais Naziri, Westley Hayes, Julio J Jauregui, Bhaveen H Kapadia, William P Urban, Bashir A Zikria
INTRODUCTION: The incidence of graft length mismatch (GLM) during anterior cruciate ligament (ACL) reconstruction is reported to be up to 13%, with a rate of 20% when using bone-patellar tendon-bone (BPTB) allografts. Multiple techniques have been described to accommodate for the longer BPTB graft. As no study has compared the biomechanical properties of these methods (with cyclic loading), we evaluated the strength of four different surgical techniques used to accommodate for GLM during ACL reconstruction...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28195986/functional-bracing-after-anterior-cruciate-ligament-reconstruction-a-systematic-review
#8
Walter R Lowe, Ryan J Warth, Elizabeth P Davis, Lane Bailey
INTRODUCTION: The purpose of this study was to evaluate the current literature on the use of functional knee braces after anterior cruciate ligament (ACL) reconstruction with respect to clinical and in vivo biomechanical data. METHODS: A systematic search of both the PubMed and Embase databases was performed to identify all studies that reported clinical and/or in vivo biomechanical results of functional bracing versus nonbracing after ACL reconstruction. Extracted data included study design, surgical reconstruction techniques, postoperative rehabilitation protocols, objective outcomes, and subjective outcomes scores...
March 2017: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/28195744/-proprietary-processed-allografts
#9
Troy A Roberson, Jeffrey T Abildgaard, Douglas J Wyland, Paul C Siffri, Stephen P Geary, Richard J Hawkins, John M Tokish
BACKGROUND: The processing of allograft tissues in anterior cruciate ligament (ACL) reconstruction continues to be controversial. While high-dose irradiation of grafts has received scrutiny for high failure rates, lower dose irradiation and "proprietary-based" nonirradiated sterilization techniques have become increasingly popular, with little in the literature to evaluate their outcomes. Recent studies have suggested that the specifics of allograft processing techniques may be a risk factor for higher failure rates...
February 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28173988/gender-differences-in-the-restoration-of-knee-joint-biomechanics-during-gait-after-anterior-cruciate-ligament-reconstruction
#10
Makoto Asaeda, Masataka Deie, Naoto Fujita, Yoshifumi Kono, Chiaki Terai, Wataru Kuwahara, Hodaka Watanabe, Hiroaki Kimura, Nobuo Adachi, Toru Sunagawa, Mitsuo Ochi
BACKGROUND: The aim of our study was to evaluate the effects of gender on recovery of knee joint biomechanics over the stance phase of gait after reconstruction of the anterior cruciate ligament (ACL). METHODS: Gait parameters and knee joint kinematics and kinetics were compared in 32 patients (16 male and 16 female) who underwent ACL reconstruction for a unilateral ACL deficiency, with comparison to an age-, height-, and weight-matched Control group. Knee flexion, adduction and tibial rotation angles were measured and knee extension and abduction moment was calculated by inverse dynamics methods...
February 4, 2017: Knee
https://www.readbyqxmd.com/read/28165760/comparison-of-acl-strain-in-the-mcl-deficient-and-mcl-reconstructed-knee-during-simulated-landing-in-a-cadaveric-model
#11
Eric J Mancini, Robert Kohen, Amanda O Esquivel, Allison M Cracchiolo, Stephen Edward Lemos
BACKGROUND: Noncontact anterior cruciate ligament (ACL) injury after valgus landing has been reported and studied biomechanically. However, the role of the medial collateral ligament (MCL) in dissipating these forces has not been fully elucidated. Purpose/Hypothesis: The purpose of this study was to investigate the role that the MCL plays in ACL strain during simulated landing. The hypothesis was that ACL strain would increase significantly in MCL-incompetent knees compared with the native knee and that reconstructing the MCL would return the values to those of the intact knee...
February 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28154888/permanent-knee-sensorimotor-system-changes-following-acl-injury-and-surgery
#12
John Nyland, Collin Gamble, Tiffany Franklin, David N M Caborn
The cruciate ligaments are components of the knee capsuloligamentous system providing vital neurosensory and biomechanical function. Since most historical primary ACL repair attempts were unsuccessful, reconstruction has become the preferred surgery. However, an increased understanding of the efficacy of lesion-site scaffolding, innovative suturing methods and materials, and evolving use of biological healing mediators such as platelet-rich plasma and stem cells has prompted reconsideration of what was once believed to be impossible...
February 2, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28150869/biochemical-markers-of-cartilage-metabolism-are-associated-with-walking-biomechanics-six-months-following-anterior-cruciate-ligament-reconstruction
#13
Brian Pietrosimone, Richard F Loeser, J Troy Blackburn, Darin A Padua, Matthew S Harkey, Laura E Stanley, Brittney A Luc-Harkey, Veronica Ulici, Stephen W Marshall, Joanne M Jordan, Jeffery T Spang
The purpose of our study was to determine the association between biomechanical outcomes of walking gait (peak vertical ground reaction force [vGRF], vGRF loading rate [vGRF-LR] and knee adduction moment [KAM]) six months following anterior cruciate ligament reconstruction (ACLR) and biochemical markers of serum type-II collagen turnover (collagen type-II cleavage product to collagen type-II C-propeptide [C2C:CPII]), plasma degenerative enzymes (matrix metalloproteinase-3 [MMP-3]), and a pro-inflammatory cytokine (interleukin-6 [IL-6])...
February 2, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28149722/combined-anterior-cruciate-ligament-and-anterolateral-ligament-reconstruction
#14
Bertrand Sonnery-Cottet, Matt Daggett, Camilo Partezani Helito, Jean-Marie Fayard, Mathieu Thaunat
Despite technologic advances in the surgical technique for anterior cruciate ligament (ACL) reconstruction, some patients continue to have rotational instability postoperatively. Recently, authors have reported the anatomic and functional characteristics of the anterolateral ligament (ALL), a structure that originates near the lateral epicondyle on the femur and inserts on the tibia between the Gerdy tubercle and the fibular head. Recent biomechanical studies have shown the ALL is an important stabilizer against anterolateral tibial rotation, and its reconstruction has shown excellent initial clinical results...
December 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28128475/cyclops-lesions-are-associated-with-altered-gait-patterns-and-medial-knee-joint-cartilage-degeneration-at-one-year-after-acl-reconstruction
#15
Michael A Samaan, Luca Facchetti, Valentina Pedoia, Matthew S Tanaka, Thomas M Link, Richard B Souza, C Benjamin Ma, Xiaojuan Li
In this exploratory study, gait analysis and quantitative MRI (QMRI) were used to assess biomechanical differences in patients that present with cyclops lesions at 12 months after ACL-reconstruction (ACLR). Thirty ACLR patients without and 10 ACLR patients with cyclops lesions underwent 3T MR T1ρ mapping of the reconstructed knee joint prior to ACLR and at 12 months after ACLR, as well as a gait assessment during a fixed walking speed at 12 months after ACLR. Both external sagittal and frontal plane knee joint moments and joint moment impulses were calculated and assessed throughout the stance phase of gait...
January 27, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28089795/comparison-of-postoperative-biomechanical-function-between-anatomic-double-bundle-and-single-bundle-acl-reconstructions-using-calcium-phosphate-hybridized-tendon-grafts-in-goats
#16
Hirotaka Mutsuzaki, Hiromichi Fujie, Hiromi Nakajima, Makoto Fukagawa, Shunsuke Nomura, Masataka Sakane
BACKGROUND: Calcium phosphate (CaP)-hybridized tendon grafts improved biomechanical function compared with untreated grafts after single-bundle (SB) anterior cruciate ligament (ACL) reconstruction.The purpose of this study was to compare the biomechanical functionbetweenanatomic double-bundle (DB)and single-bundle (SB)ACL reconstructions using CaP-hybridized tendon grafts at 6 months postoperativelyin goats. HYPOTHESIS: We hypothesized that the postoperativebiomechanicalfunctioninthe DBgroupwill bebetterthan that inthe SB group...
January 9, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28078610/optimization-of-the-return-to-sport-paradigm-after-anterior-cruciate-ligament-reconstruction-a-critical-step-back-to-move-forward
#17
REVIEW
Bart Dingenen, Alli Gokeler
Athletes who have sustained an anterior cruciate ligament (ACL) injury often opt for an ACL reconstruction (ACLR) with the goal and expectation to resume sports. Unfortunately, the proportion of athletes successfully returning to sport is relatively low, while the rate of second ACL injury has been reported to exceed 20% after clearance to return to sport, especially within younger athletic populations. Despite the development of return-to-sport guidelines over recent years, there are still more questions than answers on the most optimal return-to-sport criteria after ACLR...
January 11, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28027653/biomechanical-comparison-of-anterolateral-procedures-combined-with-anterior-cruciate-ligament-reconstruction
#18
Eivind Inderhaug, Joanna M Stephen, Andy Williams, Andrew A Amis
BACKGROUND: Anterolateral soft tissue structures of the knee have a role in controlling anterolateral rotational laxity, and they may be damaged at the time of anterior cruciate ligament (ACL) ruptures. PURPOSE: To compare the kinematic effects of anterolateral operative procedures in combination with intra-articular ACL reconstruction for combined ACL plus anterolateral-injured knees. STUDY DESIGN: Controlled laboratory study. METHODS: Twelve cadaveric knees were tested in a 6 degrees of freedom rig using an optical tracking system to record the kinematics through 0° to 90° of knee flexion with no load, anterior drawer, internal rotation, and combined loading...
February 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28024306/a-canine-arthroscopic-anterior-cruciate-ligament-reconstruction-model-for-study-of-synthetic-augmentation-of-tendon-allografts
#19
James L Cook, Pat Smith, James P Stannard, Ferris Pfeiffer, Keiichi Kuroki, Chantelle C Bozynski, Cristi Cook
Novel graft types, fixation methods, and means for augmenting anterior cruciate ligament (ACL) reconstructions require preclinical validation prior to safe and effective clinical application. The objective of this study was to describe and validate a translational canine model for all-inside arthroscopic complete ACL reconstruction using a quadriceps tendon allograft with internal brace (QTIB). With institutional approval, adult research hounds underwent complete transection of the native ACL followed by all-inside ACL reconstruction using the novel QTIB construct with suspensory fixation (n = 10)...
December 26, 2016: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28005093/ultrasound-guided-percutaneous-reconstruction-of-the-anterolateral-ligament-surgical-technique-and-case-report
#20
Alan M Hirahara, Wyatt J Andersen
The first noted description of the anterolateral ligament (ALL) is often attributed to Dr. Paul Segond (1879). Segond described a "fibrous, pearly band showing extreme amounts of tension during forced internal rotation" that was responsible for an avulsion at the lateral aspect of the proximal tibia. In 2013, Dr. Steven Claes confirmed the presence of the ALL as the band of tissue detailed by Segond. Recent biomechanical studies have shown that the ALL is a vital stabilizer during internal rotation of the knee...
November 2016: American Journal of Orthopedics
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