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ACL reconstruction and biomechanics

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https://www.readbyqxmd.com/read/28530131/a-novel-combination-of-a-polycaprolactone-fumarate-pclf-scaffold-with-polyethylene-terephthalate-pet-sutures-for-intra-articular-ligament-regeneration
#1
Joshua Parry, Eric R Wagner, Peter Kok, Mahrokh Dadsetan, Michael J Yaszemski, Andre J van Wijnen, Sanjeev Kakar
Intra-articular ligamentous injuries are typically unrepairable and have limited outcomes after graft reconstruction. A combination of porous polycaprolactone fumarate (PCLF) scaffolds with polyethylene terephthalate (PET) sutures was developed with the goal of regenerating intra-articular ligaments. Scaffolds were fabricated by injecting PCLF over 3D-printed molds containing two strands of PET suture down its central pore followed by crosslinking. Scaffolds were seeded with human mesenchymal stem cells (MSCs) from adipose tissue...
May 20, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28522238/biomechanical-comparison-of-four-coupled-fixation-systems-for-acl-reconstruction-with-bone-socket-or-full-tunnel-on-the-tibial-side
#2
Edoardo Monaco, Mattia Fabbri, Riccardo Maria Lanzetti, Andrea Del Duca, Luca Labianca, Andrea Ferretti
BACKGROUND: To compare in an animal model the biomechanical properties of four coupled fixation devices currently used in ACL reconstruction. Three out of four devices used a full tibial tunnel with an interference screw, while the other one system used a tibial socket and an adjustable loop suspension device. The null hypothesis is that there are no biomechanical differences between all the techniques tested. METHODS: Thirty two femur-graft-tibia complexes were mounted on a tensile machine using bovine digital extensor tendons, porcine knees and four different fixation device combinations: After a preconditioning with a tensile load of 90N for five minutes, 1000cycles between 0 and 150N were applied to the complex before the final pulled to failure...
May 15, 2017: Knee
https://www.readbyqxmd.com/read/28502387/anterolateral-ligament-reconstruction-techniques-biomechanics-and-clinical-outcomes-a-systematic-review
#3
REVIEW
Nicholas N DePhillipo, Mark E Cinque, Jorge Chahla, Andrew G Geeslin, Robert F LaPrade
PURPOSE: To perform a systematic review of the described anterolateral ligament (ALL) reconstruction techniques, biomechanical performance, and clinical outcomes of ALL reconstruction in the setting of concurrent anterior cruciate ligament (ACL) reconstruction. METHODS: A systematic review was performed according to PRISMA guidelines using the Cochrane Database of Systematic Reviews, the Cochrane Central Register of Controlled Trials, PubMed, MEDLINE, and Embase, from 1980 to present...
May 11, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28461919/anterior-cruciate-ligament-reconstruction-principles-of-treatment
#4
REVIEW
Nikolaos K Paschos, Stephen M Howell
Anterior cruciate ligament (ACL) reconstruction is one of the most common procedures in sports medicine. Several areas of controversy exist in ACL tear management which have engaged surgeons and researchers in debates towards identifying an ideal approach for these patients.This instructional review discusses the principles of ACL reconstruction in an attempt to provide guidelines and initiate a critical thinking approach on the most common areas of controversy regarding ACL reconstruction.Using high-level evidence from the literature, as presented in randomised controlled trials, systematic reviews, and meta-analyses, operative versus conservative treatment, timing of surgery, and rehabilitation are discussed...
November 2016: EFORT Open Rev
https://www.readbyqxmd.com/read/28451617/return-to-sport-for-skeletally-immature-athletes-after-acl-reconstruction-preventing-a-second-injury-using-a-quality-of-movement-assessment-and-quantitative-measures-to-address-modifiable-risk-factors
#5
Jessica Graziano, Theresa Chiaia, Polly de Mille, Danyal H Nawabi, Daniel W Green, Frank A Cordasco
BACKGROUND: Reinjury rates after anterior cruciate ligament reconstruction (ACLR) are highest among young athletes, who consequently suffer from low rates of return to play. Historically, quantitative measures have been used to determine readiness to return to sport; however, they do not assess modifiable risk factors related to the quality of movement. PURPOSE: To determine the effectiveness of a criteria-based rehabilitation progression and return-to-sport criteria on efficient return to activity and prevention of second injury in young athletes post-ACLR...
April 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28426251/current-concepts-of-the-anterolateral-ligament-of-the-knee-anatomy-biomechanics-and-reconstruction
#6
Matthew J Kraeutler, K Linnea Welton, Jorge Chahla, Robert F LaPrade, Eric C McCarty
In 1879, Paul Segond described an avulsion fracture (now known as a Segond fracture) at the anterolateral proximal tibia with the presence of a fibrous band at the location of this fracture. Although references to this ligament were occasionally made in the anatomy literature after Segond's discovery, it was not until 2012 that Vincent et al named this ligament what we know it as today, the anterolateral ligament (ALL) of the knee. The ALL originates near the lateral epicondyle of the distal femur and inserts on the proximal tibia near Gerdy's tubercle...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28393268/the-scientific-rationale-for-lateral-tenodesis-augmentation-of-intra-articular-acl-reconstruction-using-a-modified-lemaire-procedure
#7
Andy Williams, Simon Ball, Jo Stephen, Nathan White, Mary Jones, Andrew Amis
PURPOSE: The purpose of this work was to develop the rationale for adding a lateral extra-articular tenodesis to an ACL reconstruction in a knee with an injury that included both the ACL and anterolateral structures, and to show the early clinical picture. METHODS: The paper includes a review of recent anatomical and biomechanical studies of the anterolateral aspect of the knee. It then provides a detailed description of a modified Lemaire tenodesis technique. A short-term clinical follow-up of a case and control group was performed, with two sequential groups of patients treated by isolated ACL reconstruction, and by combined ACL plus lateral tenodesis...
April 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28373946/anteromedial-portal-anterior-cruciate-ligament-reconstruction-with-tibialis-anterior-allograft
#8
Steven Shamah, Daniel Kaplan, Eric J Strauss, Brian Singh
In an effort to better restore normal joint function and kinematics, recent emphasis has been placed on surgical techniques that provide a more anatomic reconstruction of the anterior cruciate ligament (ACL). With femoral tunnel placement shown to play a vital role in the biomechanics, stability, and clinical outcomes after ACL reconstruction, approaches that better approximate the ACL's native femoral origin have been adopted. The independent anteromedial portal technique is thought to better position the femoral tunnel within the native ACL footprint and leave the graft more posteroinferior on the wall of the lateral femoral condyle than the more traditional transtibial approach...
February 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28373940/tibial-tunnel-positioning-technique-using-bony-anatomical-landmarks-in-anatomical-anterior-cruciate-ligament-reconstruction
#9
Hiroki Shimodaira, Keiji Tensho, Yusuke Akaoka, Seiji Takanashi, Hiroyuki Kato, Naoto Saito
Because various biomechanical studies and clinical results have shown the effectiveness of an anatomical approach for anterior cruciate ligament (ACL) reconstruction, this approach has become gradually commonplace to improve postoperative performance. Standard tunnel positioning methods with accuracy, reproducibility, and adaptability to varied concepts are essential for the success of anatomical ACL reconstruction. However, there were no standard tibial tunnel positioning methods to satisfy these conditions...
February 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28370990/exploring-the-in-vitro-and-in-vivo-compatibility-of-pla-pla-gnp-and-pla-cnt-cooh-biodegradable-nanocomposites-prospects-for-tendon-and-ligament-applications
#10
Viviana Correia Pinto, Raquel Costa-Almeida, Ilda Rodrigues, Luísa Guardão, Raquel Soares, Rui Miranda Guedes
Anterior cruciate ligament (ACL) reconstructive surgeries are the most frequent orthopedic procedures in the knee. Currently, existing strategies fail in completely restoring tissue functionality and have a high failure rate associated, presenting a compelling argument towards the development of novel materials envisioning ACL reinforcement. Tendons and ligaments, in general, have a strong demand in terms of biomechanical features of developed constructs. We have previously developed polylactic acid (PLA)-based biodegradable films reinforced either with graphene nanoplatelets (PLA/GNP) or with carboxyl-functionalized carbon nanotubes (PLA/CNT-COOH)...
March 28, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28366841/digital-image-correlation-aided-mechanical-characterization-of-the-anteromedial-and-posterolateral-bundles-of-the-anterior-cruciate-ligament
#11
Kaitlyn Mallett, Ellen M Arruda
The anterior cruciate ligament (ACL) is one of the most commonly injured soft tissue structures in the articular knee joint, often requiring invasive surgery for patients to restore pre-injury knee kinematics. There is a pressing need to understand the role of the ACL in knee function, in order to select proper replacements. Digital image correlation (DIC), a non-contact full field displacement measurement technique, is an established tool for evaluating non-biological materials. The application of DIC to soft tissues has been in the nascent stages, largely due to patterning challenges of such materials...
March 30, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28360487/all-inside-acl-reconstruction-how-does-it-compare-to-standard-acl-reconstruction-techniques
#12
REVIEW
Alexander J Connaughton, Andrew G Geeslin, Christopher W Uggen
The all-inside ACL reconstruction technique is a relatively new development in ACL surgery. Some features of this technique include closed-socket tunnels, dual suspensory graft fixation, decreased bone removal, and smaller skin incisions. The purpose of this review was to compare the unique features of the all-inside ACL versus standard ACL techniques using biomechanical and clinical studies. The all-inside ACL appears to have similar overall results on subjective and objective outcomes studies compared to standard ACL techniques and may be associated with decreased post-operative pain...
June 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28355681/a-biomechanical-study-of-two-distinct-methods-of-anterior-cruciate-ligament-rupture-and-a-novel-surgical-reconstruction-technique-in-a-small-animal-model-of-posttraumatic-osteoarthritis
#13
Austin J Ramme, Matin S Lendhey, Eric J Strauss, Oran D Kennedy
Small animal models are critical for studies of sports-related knee injury and disease such as posttraumatic osteoarthritis (PTOA) following anterior cruciate ligament (ACL) rupture. In such models, ACL damage can be achieved by surgical transection or, using a more recent innovation, by noninvasive biomechanical means. Whether these approaches differentially alter normal mechanics is unknown. Furthermore, while surgical reconstruction of ruptured ACL can greatly improve joint stability, its effect on PTOA development is also unclear...
March 29, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28353048/what-factors-influence-the-biomechanical-properties-of-allograft-tissue-for-acl-reconstruction-a-systematic-review
#14
Drew A Lansdown, Andrew J Riff, Molly Meadows, Adam B Yanke, Bernard R Bach
BACKGROUND: Allograft tissue is used in 22% to 42% of anterior cruciate ligament (ACL) reconstructions. Clinical outcomes have been inconsistent with allograft tissue, with some series reporting no differences in outcomes and others reporting increased risk of failure. There are numerous variations in processing and preparation that may influence the eventual performance of allograft tissue in ACL reconstruction. We sought to perform a systematic review to summarize the factors that affect the biomechanical properties of allograft tissue for use in ACL reconstruction...
March 28, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28299388/the-combination-of-tibial-anterior-translation-and-axial-rotation-into-a-single-biomechanical-factor-improves-the-prediction-of-patient-satisfaction-over-each-factor-alone-in-patients-with-acl-reconstructed-knees
#15
Thomas P Branch, Shaun K Stinton, William C Hutton, Philippe Neyret
PURPOSE: The purpose of this study was to identify biomechanical factors, in both reconstructed and healthy knees, that correlate with patient satisfaction after ACL reconstruction. METHODS: Seventeen patients who had undergone unilateral ACL reconstruction were reviewed 9 years post-op. Patients completed subjective questionnaires and underwent manual knee laxity testing (Lachman-Trillat, KT-1000, and pivot shift) and automated laxity testing. During automated testing, both legs were rotated into external rotation and then internal rotation until peak rotational torque reached 5...
April 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28298055/the-effect-of-graft-pretensioning-on-bone-tunnel-diameter-and-bone-formation-after-anterior-cruciate-ligament-reconstruction-in-a-rat-model-evaluation-with-micro-computed-tomography
#16
Jian-Chun Zong, Richard Ma, Hongsheng Wang, Guang-Ting Cong, Amir Lebaschi, Xiang-Hua Deng, Scott A Rodeo
BACKGROUND: Moderate graft pretensioning in anterior cruciate ligament (ACL) reconstruction is paramount to restore knee stability and normalize knee kinematics. However, little is known about the effect of graft pretensioning on graft-to-bone healing after ACL reconstruction. HYPOTHESIS: Moderate graft pretensioning will improve bone formation within the bone tunnel after ACL reconstruction, resulting in superior load to failure. STUDY DESIGN: Controlled laboratory study...
May 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28286916/contributions-of-the-anterolateral-complex-and-the-anterolateral-ligament-to-rotatory-knee-stability-in-the-setting-of-acl-injury-a-roundtable-discussion
#17
REVIEW
Volker Musahl, Alan Getgood, Philippe Neyret, Steven Claes, Jeremy M Burnham, Cecile Batailler, Bertrand Sonnery-Cottet, Andy Williams, Andrew Amis, Stefano Zaffagnini, Jón Karlsson
Persistent rotatory knee laxity is increasingly recognized as a common finding after anterior cruciate ligament (ACL) reconstruction. While the reasons behind rotator knee laxity are multifactorial, the impact of the anterolateral knee structures is significant. As such, substantial focus has been directed toward better understanding these structures, including their anatomy, biomechanics, in vivo function, injury patterns, and the ideal procedures with which to address any rotatory knee laxity that results from damage to these structures...
April 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28282242/influence-of-the-injury-to-surgery-interval-on-the-healing-potential-of-human-anterior-cruciate-ligament-derived-cells
#18
Takao Inokuchi, Tomoyuki Matsumoto, Koji Takayama, Naoki Nakano, Shurong Zhang, Daisuke Araki, Takehiko Matsushita, Ryosuke Kuroda
BACKGROUND: Vascular CD34+ cells in anterior cruciate ligament (ACL) tissue have the potential for high proliferation and multilineage differentiation that can accelerate tendon-bone healing. While patient characteristics, such as age, can affect tendon-bone healing, the influence of elapsed time after injury on the healing process is unclear. HYPOTHESIS: Cells obtained during the early phase after injury will exhibit a greater tendon-bone healing potential compared with chronic phase counterparts when applied to an immunodeficient rat model of ACL reconstruction...
May 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28275205/a-comparative-study-of-effect-of-autograft-compared-with-allograft-anterior-cruciate-ligament-reconstruction-on-expressions-of-loxs-and-mmps
#19
Wei-Ming Wang, Xiao-Jun Ma, Shi-Bo Huang, Liu-Bao Ren, Yu-Peng Liu
The present study aimed to compare the effect of autograft or allograft anterior cruciate ligament (ACL) reconstruction on the expressions of lipoxygenases (LOXs) and matrix metalloproteinases (MMPs) in a New Zealand white rabbit model. New Zealand white rabbits were divided randomly into control, sham, autograft and allograft groups. At the 4th and 8th week after operation, biomechanical testing was performed to measure the primary length, cross-sectional area, maximum tensile load and stiffness of ACL, and HE staining was used to observe cell morphology and fibre alignment of ACL...
April 30, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28258329/function-and-strain-of-the-anterolateral-ligament-part-i-biomechanical-analysis
#20
Björn Holger Drews, Oliver Kessler, Wolfgang Franz, Lutz Dürselen, Maren Freutel
PURPOSE: Because reconstruction of the anterior cruciate ligament (ACL) in a double-bundle technique did not solve the problem of persistent rotatory laxity after surgery, new potential answers to this issue are of great interest. One of these is an extraarticular stabilization based on the rediscovery of the anterolateral ligament (ALL). Knowledge about its biomechanical function and benchmark data for an optimal reconstruction remain lacking. Therefore, the purpose of this study was to assess the function of the ALL under passive motion, anterior tibial translation and tibial rotational moments...
April 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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