Read by QxMD icon Read

ACL reconstruction and biomechanics

Jeong-Ku Ha, Dhong-Won Lee, Jin-Goo Kim
BACKGROUND: Numerous studies have elucidated the functional anatomy and biomechanics of the anterior cruciate ligament (ACL), as a result, double-bundle (DB) ACL reconstruction has received much attention and has become a popular choice because it gives better rotational stability. Many other studies, however, found no differences with respect to stability, and/or other clinical outcomes between the DB and single-bundle (SB) techniques. There is still not enough evidence as to whether the anatomical DB anterior cruciate ligament reconstruction (ACLR) is superior to anatomical SB reconstruction...
September 2016: Indian Journal of Orthopaedics
Lei Zhang, Kan Jiang, Hao Chai, Mei Zhou, Jingping Bai
BACKGROUND The aim of this study was to determine if anterior cruciate ligament (ACL) reconstruction by remnant preservation promotes cell proliferation, vascularization, proprioception recovery, and improved biomechanical properties of the tendon grafts. MATERIAL AND METHODS 75 New Zealand rabbits were randomly assigned into the control group (group A), conventional ACL reconstruction group (group B), ACL reconstruction using remnant preservation and graft through remnant sleeve technique group (group C), and ACL reconstruction using remnant preservation and remnant tensioning technique group (group D)...
September 26, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
A Ebert, K-H Frosch
Background: Anatomical reconstruction of the anterior cruciate ligament (ACL) using the double-bundle (DB) technique is becoming increasingly popular. Despite its proved biomechanical and anatomical superiority, clinical studies have found little advantage for the DB technique. The aim of this study was therefore to evaluate whether an experienced surgeon is able to obtain his usual good results with ACL reconstruction with the single-bundle (SB) technique directly after changing to the DB technique. Patients/Material and Methods: In a prospective, non-randomised and controlled interventional study, we compared the first 19 patients in our clinic who had an anterior cruciate ligament reconstruction using the DB technique with 31 patients who underwent a SB ACL reconstruction performed by the same surgeon during the same period of investigation...
October 2016: Zeitschrift Für Orthopädie und Unfallchirurgie
Mark D Porter, Bruce Shadbolt
BACKGROUND: Recommendations for bone tunnel placement during anterior cruciate ligament (ACL) reconstruction have become more precise. However, these recommendations differ neither with the choice of graft nor with the method of fixation used. The influence of the method of femoral fixation used on the biomechanical function of a soft tissue ACL graft remains unknown. HYPOTHESIS: Our null hypothesis was that adding femoral aperture fixation to femoral cortical fixation, using the same bone tunnels, will not alter the control of anterior translation (AT) and internal rotation (IR) during ACL reconstruction using a hamstring graft...
September 2016: Orthopaedic Journal of Sports Medicine
Breck R Lord, Hadi El-Daou, Bhushan M Sabnis, Chinmay M Gupte, Adrian M Wilson, Andrew A Amis
PURPOSE: Double-bundle (DB) anterior cruciate ligament (ACL) reconstruction may offer kinematic restoration superior to anatomic single bundle (SB), but it remains technically challenging. The femoral attachment site has the most effect on ACL graft isometry, so a simplified three-socket (3S) construct which still uses two sockets to cover the femoral ACL attachment is attractive. It was hypothesised that ACL reconstruction using three- and four-socket techniques would more closely restore native knee kinematics compared to anatomic two-socket (SB) surgery...
September 16, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
W Charles Lockwood, Daniel Cole Marchetti, Kimi D Dahl, Jacob D Mikula, Brady T Williams, Matthew M Kheir, Travis Lee Turnbull, Robert F LaPrade
PURPOSE: In order to minimize viscoelastic elongation of ACL reconstruction grafts, preconditioning protocols have been employed in clinical practice prior to final graft fixation. The purpose of this study was to evaluate two separate high-load static preconditioning protocols of double-looped semitendinosus-gracilis grafts and compare these results to both a current clinical protocol and a control group with no preconditioning protocol applied. It was hypothesized that a high-load, static preconditioning protocol would minimize graft elongation during a simulated progressive early rehabilitation compared to both the "89 N" clinical protocol and control groups...
September 13, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Jan-Hendrik Naendrup, Jason P Zlotnicki, Tom Chao, Kanto Nagai, Volker Musahl
Anterior cruciate ligament (ACL) reconstruction aims to restore the translational and rotational motion to the knee joint that is lost after injury. However, despite technical advancements, clinical outcomes are less than ideal, particularly in return to previous activity level. A major issue is the inability to standardize treatment protocols due to variations in materials and approaches used to accomplish ACL reconstruction. These include surgical techniques such as the transtibial and anteromedial portal methods that are currently under use and the wide availability of graft types that will be used to reconstruct the ACL...
September 13, 2016: Current Reviews in Musculoskeletal Medicine
Marcio de Castro Ferreira, Flavio Ferreira Zidan, Francini Belluci Miduati, Caio Cesar Fortuna, Bruno Moreira Mizutani, Rene Jorge Abdalla
Recent anatomical and biomechanical studies on the anterolateral ligament (ALL) of the knee have shown that this structure has an important function in relation to joint stability, especially when associated with anterior cruciate ligament (ACL) injury. However, the criteria for its reconstruction have not yet been fully established and the surgical techniques that have been described present variations regarding anatomical points and fixation materials. This study presents a reproducible technique for ALL and ACL reconstruction using hamstring tendons, in which three interference screws are used for fixation...
July 2016: Revista Brasileira de Ortopedia
Takanori Kokubun, Naohiko Kanemura, Kenji Murata, Hideki Moriyama, Sadao Morita, Tetsuya Jinno, Hidetoshi Ihara, Kiyomi Takayanagi
BACKGROUND: The poor healing capacity of a completely ruptured anterior cruciate ligament (ACL) has been attributed to an insufficient vascular supply, cellular metabolism, and deficient premature scaffold formation because of the unique intra-articular environment. However, previous studies have focused on intra-articular factors without considering extra-articular factors, including the biomechanical aspects of ACL-deficient knees. HYPOTHESIS: Changing the joint kinematics of an ACL-ruptured knee will improve cellular biological responses and lead to spontaneous healing through the mechanotransduction mechanism...
August 9, 2016: American Journal of Sports Medicine
Jorge Chahla, Chase S Dean, Gilbert Moatshe, Justin J Mitchell, Tyler R Cram, Carlos Yacuzzi, Robert F LaPrade
Meniscal ramp lesions are more frequently associated with anterior cruciate ligament (ACL) injuries than previously recognized. Some authors suggest that this entity results from disruption of the meniscotibial ligaments of the posterior horn of the medial meniscus, whereas others support the idea that it is created by a tear of the peripheral attachment of the posterior horn of the medial meniscus. Magnetic resonance imaging (MRI) scans have been reported to have a low sensitivity, and consequently, ramp lesions often go undiagnosed...
July 2016: Orthopaedic Journal of Sports Medicine
Daniel K Schneider, Alli Gokeler, Bert Otten, Kevin R Ford, Timothy E Hewett, Jon Divine, Angelo J Colosimo, Robert S Heidt, Gregory D Myer
A mass-spring-damper model may serve as an extension of biomechanical data from three-dimensional motion analysis and epidemiological data which help to delineate populations at-risk for anterior cruciate ligament (ACL) injuries. The purpose of this study was to evaluate such a model.\Thirty-six ACL reconstruction (ACLR) group subjects and 67 controls (CTRL) completed single-leg drop landing and single-leg broad jump tasks. Landing ground reaction force data were collected and analyzed with a mass-spring damper model...
July 19, 2016: Journal of Strength and Conditioning Research
T Schmidt, D Grabau, J H Grotewohl, U Gohs, A Pruß, M Smith, S Scheffler, A Hoburg
PURPOSE: Allografts are frequently used for anterior cruciate ligament (ACL) reconstruction. However, due to the inherent risk of infection, a method that achieves complete sterilization of grafts is warranted without impairing their biomechanical properties. Fractionation of electron beam (FEbeam) irradiation has been shown to maintain similar biomechanical properties compared to fresh-frozen allografts (FFA) in vitro. Therefore, aim of this study was to evaluate the biomechanical properties and early remodelling of grafts that were sterilized with fractionated high-dose electron beam irradiation in an in vivo sheep model...
July 20, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Jason M Schon, Gilbert Moatshe, Alex W Brady, Raphael Serra Cruz, Jorge Chahla, Grant J Dornan, Travis Lee Turnbull, Lars Engebretsen, Robert F LaPrade
BACKGROUND: Anterior cruciate ligament (ACL) tears are one of the most common injuries among athletes. However, the ability to fully restore rotational stability with ACL reconstruction (ACLR) remains a challenge, as evidenced by the persistence of rotational instability in up to 25% of patients after surgery. Advocacy for reconstruction of the anterolateral ligament (ALL) is rapidly increasing because some biomechanical studies have reported that the ALL is a significant contributor to internal rotational stability of the knee...
July 12, 2016: American Journal of Sports Medicine
Philipp Forkel, Peter Foehr, Johannes C Meyer, Elmar Herbst, Wolf Petersen, Peter U Brucker, Rainer Burgkart, Andreas B Imhoff
PURPOSE: The purpose of the present study was to biomechanically compare three different posterior meniscal root repair techniques. Transtibial fixation of a posterior meniscus root tear (PMRT) combined with an anterior cruciate ligament (ACL) reconstruction via one tunnel only shows similar properties in terms of cyclic loading and load to failure compared with direct anchor fixation. METHODS: Twenty-eight porcine knees were randomly assigned to 4 groups (n = 7 each): (1) native posterior meniscal root, (2) suture anchor repair, (3) refixation via a tibial ACL tunnel in combination with an interference screw fixation of the ACL graft, and (4) refixation via a tibial ACL tunnel in combination with an interference screw fixation of the ACL graft with an additional extracortical button fixation...
July 11, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Lisa Tibor, Priscilla H Chan, Tadashi T Funahashi, Ronald Wyatt, Gregory B Maletis, Maria C S Inacio
BACKGROUND: The surgical technique for anterior cruciate ligament (ACL) reconstruction has evolved as a result of improved understanding of ligament biomechanics, anatomy, device development, and failed reconstructions. Studies on surgical technique preferences have been limited to surgeon surveys, which are subject to selection and recall bias. The purpose of this study was to evaluate ACL reconstruction surgical technique and yearly revision rate trends in a community-based setting...
July 6, 2016: Journal of Bone and Joint Surgery. American Volume
Christian Lutz, Bertrand Sonnery-Cottet, Pierre Imbert, Nuno Camelo Barbosa, Sanesh Tuteja, Jean-Henri Jaeger
Interest and knowledge on the anatomy, function, and biomechanical properties of the anterolateral ligament has led to the recognition of the importance of this structure in rotational control of the knee. This article describes a technique that allows for a combined anterior cruciate ligament (ACL) and anterolateral reconstruction, using an Iliotibial band (ITB) autograft. The graft is detached from the vastus lateralis from proximal to distal, at the center portion from ITB, preserving its distal insertion on the Gerdy tubercle...
April 2016: Arthroscopy Techniques
Samuel K Van de Velde, William A Kernkamp, Ali Hosseini, Robert F LaPrade, Ewoud R van Arkel, Guoan Li
BACKGROUND: Both anatomic anterolateral ligament (ALL) and nonanatomic anterolateral reconstructions are performed to improve the stability of anterior cruciate ligament (ACL)-deficient patients. However, the in vivo length change patterns and isometry of these anterolateral reconstructions are unknown. PURPOSE: To measure the theoretical length change patterns of the ALL and various anterolateral extra-articular reconstructions in healthy and ACL-deficient knees during in vivo weightbearing flexion...
June 23, 2016: American Journal of Sports Medicine
Erik L Slette, Jacob D Mikula, Jason M Schon, Daniel C Marchetti, Matthew M Kheir, Travis Lee Turnbull, Robert F LaPrade
PURPOSE: To systematically review and compare biomechanical results of lateral extra-articular tenodesis (LET) procedures. METHODS: A systematic review was performed using the PubMed, Medline, Embase, and Cochrane databases. The search terms included the following: extraarticular, anterolateral, iliotibial, tenodesis, plasty, augmentation, procedure, reconstruction, technique, biomechanics, kinematic, robot, cadaver, knee, lateral tenodesis, ACL, Marcacci, Lemaire, Losee, Macintosh, Ellison, Andrews, Hughston, and Muller...
June 18, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
Alex C DiBartola, Joshua S Everhart, Christopher C Kaeding, Robert A Magnussen, David C Flanigan
BACKGROUND: The objective of this study was to systematically evaluate the existing literature to compare the biomechanical effects of low dose and high dose gamma irradiation on commonly used ACL allografts. METHODS: A systematic search was performed in PubMed, Cumulative Index for Nursing and Allied Health Literature (CINAHL), Cochrane Reviews, SCOPUS, and SportDiscus. Nine studies were identified that met the following inclusion criteria: 1) controlled laboratory study, 2) investigation of standard allografts for anterior cruciate ligament reconstruction (ACLR), 3) gamma irradiation (dose reported) and a negative control group, and 4) mechanical loading (results reported)...
October 2016: Knee
Ran Thein, James Boorman-Padgett, Kyle Stone, Thomas L Wickiewicz, Carl W Imhauser, Andrew D Pearle
BACKGROUND: Injury to the lateral capsular tissues of the knee may accompany rupture of the anterior cruciate ligament (ACL). A distinct lateral structure, the anterolateral ligament, has been identified, and reconstruction strategies for this tissue in combination with ACL reconstruction have been proposed. However, the biomechanical function of the anterolateral ligament is not well understood. Thus, this study had two research questions: (1) What is the contribution of the anterolateral ligament to knee stability in the ACL-sectioned knee? (2) Does the anterolateral ligament bear increased load in the absence of the ACL? METHODS: Twelve cadaveric knees from donors who were a mean (and standard deviation) of 43 ± 15 years old at the time of death were loaded using a robotic manipulator to simulate clinical tests of the pivot shift and anterior stability...
June 1, 2016: Journal of Bone and Joint Surgery. American Volume
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"