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(Anterior cruciate ligament) AND (rate of force development)

Robert Csapo, Ramona Folie, Simona Hosp, Michael Hasler, Werner Nachbauer
OBJECTIVES: This study aimed to investigate temperature-related changes in different neuro-muscular parameters, to elucidate the reasons for the increased likeliness of injuries of the anterior cruciate ligament under cold environmental conditions. DESIGN: Repeated measures study design. METHODS: To induce peripheral cooling of the knee joint and thigh muscles, ten healthy, female subjects underwent 30 min of exposure to a cold environment...
January 2017: Physical Therapy in Sport
Brittney A Luc-Harkey, Matthew S Harkey, Laura E Stanley, J Troy Blackburn, Darin A Padua, Brian Pietrosimone
BACKGROUND: Alterations in mechanical loading following anterior cruciate ligament reconstruction may lead to the development of knee osteoarthritis. Feedback that cues a change in knee kinematics during walking gait may influence mechanical loading, yet it remains unknown if knee kinematics predict kinetics during walking gait. Our aim was to determine if sagittal plane knee kinematics predict kinetics during walking gait in anterior cruciate ligament reconstructed individuals. METHODS: Forty-one individuals with a history of primary, unilateral anterior cruciate ligament reconstruction completed a motion capture walking gait analysis...
November 2016: Clinical Biomechanics
J Troy Blackburn, Brian Pietrosimone, Matt S Harkey, Brittney A Luc, Derek N Pamukoff
Anterior cruciate ligament injury and reconstruction (ACLR) dramatically increase the risk of knee osteoarthritis, but the contributing factors, and therefore the targets for intervention, are poorly understood. Differences in loading characteristics between the ACLR and contralateral limbs during routine activities such as walking may elucidate the mechanical pathogenesis of post-traumatic knee osteoarthritis. Twenty-nine females with ACLR (age=21.7±3.1 years; time since ACL injury=48±41 months) performed walking gait at a self-selected speed from which the overall peak vertical ground reaction force (vGRF) in the first 50% of the stance phase and its linear (slope of the vGRF-time curve) and instantaneous (first time-derivative) loading rates were calculated...
September 6, 2016: Journal of Biomechanics
Brooke A Sanford, John L Williams, Audrey Zucker-Levin, William M Mihalko
BACKGROUND: This bilateral squat study tests whether people with anterior cruciate ligament (ACL) reconstruction have symmetric three-dimensional ground reaction forces (GRFs) and symmetric anterior-posterior (AP) translation rates of the femur with respect to the tibia when compared with healthy control subjects. We hypothesized that there would be no long-term asymmetry in knee kinematics and kinetics in ACL reconstructed subjects following surgery and rehabilitation. METHODS: Position and GRF data were collected on eight ACL reconstructed and eight control subjects during bilateral squat...
October 2016: Knee
J Troy Blackburn, Brian Pietrosimone, Matt S Harkey, Brittney A Luc, Derek N Pamukoff
PURPOSE: Chronic quadriceps dysfunction has been implicated as a contributor to knee osteoarthritis (OA) development after anterior cruciate ligament reconstruction (ACLR). This dysfunction potentially leads to impulsive/high-rate loading during gait, thus accelerating cartilage degradation. The purpose of this study was to examine relationships between several indices of quadriceps function and gait biomechanics linked to knee OA development in individuals with ACLR. METHODS: Gait biomechanics and quadriceps function were assessed in 39 individuals with ACLR...
September 2016: Medicine and Science in Sports and Exercise
Dragan M Mirkov, Olivera M Knezevic, Nicola A Maffiuletti, Marko Kadija, Aleksandar Nedeljkovic, Slobodan Jaric
The aim of this study was to assess the effect of a unilateral anterior cruciate ligament reconstruction (ACLR) on maximum voluntary contraction (MVC) and explosive strength of both the involved limb and the uninvolved limb. Nineteen male athletes completed a standard isometric testing protocol 4 months post-ACLR, while 16 healthy participants served as a control group (CG). The explosive strength of the knee extensors and flexors was assessed as RFD obtained from the slope of the force-time curves over various time intervals...
March 2017: Journal of Sports Sciences
Brian Pietrosimone, J Troy Blackburn, Matthew S Harkey, Brittney A Luc, Anthony C Hackney, Darin A Padua, Jeffrey B Driban, Jeffrey T Spang, Joanne M Jordan
BACKGROUND: Individuals who have sustained an anterior cruciate ligament (ACL) injury and undergo ACL reconstruction (ACLR) are at higher risk of developing knee osteoarthritis. It is hypothesized that altered knee loading may influence the underlying joint metabolism and hasten development of posttraumatic knee osteoarthritis. PURPOSE: To explore the associations between serum biomarkers of cartilage metabolism and peak vertical ground-reaction force (vGRF) and vGRF loading rate in the injured and uninjured limbs of individuals with ACLR...
February 2016: American Journal of Sports Medicine
Jesper Bie Larsen, Jean Farup, Martin Lind, Ulrik Dalgas
PURPOSE: To examine potential deficits in muscle strength or functional capacity when comparing (1) an ACL reconstructed group to matched healthy controls, (2) the ACL reconstructed leg to the non-injured leg and (3) the non-injured leg to matched healthy controls, at the time-point of recommended sport return 9-12months post-surgery. METHODS: Sixteen patients (male-female ratio: 9:7) 9-12months post ACL reconstruction and sixteen age and sex matched healthy controls were included...
February 2015: Human Movement Science
Luca Laudani, Arrigo Giombini, Pier Paolo Mariani, Fabio Pigozzi, Andrea Macaluso
OBJECTIVE: The aims of this study were to identify and quantify functional deficits between the involved and the uninvolved limb as early as 1 mo after ACL reconstruction by means of a sit-to-stand movement on two force platforms. DESIGN: Ground reaction forces were measured in 73 patients who underwent ACL reconstruction, 47 with patellar tendon autograft and 26 with hamstring tendon autograft (ACL-H), and in 22 controls, who stood up from a seat as fast as possible...
March 2014: American Journal of Physical Medicine & Rehabilitation
Jiajia Luo, Tovia M Smith, James A Ashton-Miller, John O L DeLancey
The uterine suspensory tissue (UST), which includes the cardinal (CL) and uterosacral ligaments (USL), plays an important role in resisting pelvic organ prolapse (POP). We describe a technique for quantifying the in vivo time-dependent force-displacement behavior of the UST, demonstrate its feasibility, compare data from POP patients to normal subjects previously reported, and use the results to identify the properties of the CL and USL via biomechanical modeling. Fourteen women with prolapse, without prior surgeries, who were scheduled for surgery, were selected from an ongoing study on POP...
February 2014: Journal of Biomechanical Engineering
V Franklin Sechriest, Joseph R Carney, Michael A Kuskowski, James L Haffner, Mollie J Mullen, Dana C Covey
BACKGROUND: After experiencing an unusually high incidence of knee sepsis after anterior cruciate ligament (ACL) reconstruction, we sought to (1) describe how we resolved this problem through temporary discontinuation of the procedure, formation of a multidisciplinary ACL Task Force, systematic investigation of clinical data and institutional care practices, and development and implementation of an evidence-based ACL Clinical Pathway (the Pathway); and (2) report our findings and results...
May 1, 2013: Journal of Bone and Joint Surgery. American Volume
M Kozák, J Gallo, K Langová, M Holinka
PURPOSE OF THE STUDY: Injury to the anterior cruciate ligament (ACL) frequently results in the development of knee instability. This is managed by ACL reconstruction using autogenous or allogeneic grafts. This study presents a comprehensive evaluation of the patients with ACL reconstruction using a tendon allograft harvested from the anterior tibial muscle (ATM). MATERIAL AND METHODS: The group under study comprised 53 patients, 33 men and 20 women, with unilateral ACL reconstruction while the other knee was intact...
2013: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
Nicholas Ali, Michael Skipper Andersen, John Rasmussen, D Gordon E Robertson, Gholamreza Rouhi
The central tenet of this study was to develop, validate and apply various individualised 3D musculoskeletal models of the human body for application to single-leg landings over increasing vertical heights and horizontal distances. While contributing to an understanding of whether gender differences explain the higher rate of non-contact anterior cruciate ligament (ACL) injuries among females, this study also correlated various musculoskeletal variables significantly impacted by gender, height and/or distance and their interactions with two ACL injury-risk predictor variables; peak vertical ground reaction force (VGRF) and peak proximal tibia anterior shear force (PTASF)...
2014: Computer Methods in Biomechanics and Biomedical Engineering
Massimo Angelozzi, Marco Madama, Cristiana Corsica, Vittorio Calvisi, Gianfranco Properzi, Steven T McCaw, Angelo Cacchio
STUDY DESIGN: Descriptive, prospective, longitudinal single-cohort study. OBJECTIVE: To investigate the rate of force development to 30% (RFD(30)), 50% (RFD(50)), and 90% (RFD(90)) of maximal voluntary isometric contraction (MVIC) as an adjunct outcome measure for determining readiness for return to sport following an anterior cruciate ligament (ACL) reconstruction. BACKGROUND: One criterion of full recovery following an ACL reconstruction is the ability to achieve 85% or 90% of the maximal strength of the contralateral limb...
September 2012: Journal of Orthopaedic and Sports Physical Therapy
G Strutzenberger, M Braig, S Sell, K Boes, H Schwameder
Different designs of functional knee braces for ACL-injury rehabilitation exist. In addition to the mechanical stabilization provided by rigid shell braces, sleeve braces also address proprioceptive mechanisms, but little is known if this leads to benefits for ACL-deficient subjects. Therefore the aim of this study was to investigate the effect of 2 different functional brace designs (shell and sleeve brace) on functional achievements in ACL-deficient patients. 28 subjects with ACL-ruptured knees performed tests for knee joint laxity, joint position sense, static and dynamic balance and isometric and dynamic lower limb extension strength in non-braced, sleeve braced and shell braced condition...
November 2012: International Journal of Sports Medicine
Dirk Kokmeyer, Michael Wahoff, Matt Mymern
Alpine skiing is a high-risk sport for injuries to the anterior cruciate ligament (ACL). While descending a hill, a skier must resist large centrifugal forces at a high velocity, while the knees are positioned in postures that place the ACL at risk of injury. Skiers who undergo ACL reconstructive surgery are prone to a high rate of reinjury to the same knee and even ACL injury in the uninjured knee. A rehabilitation program that integrates the best current evidence of ACL rehabilitation and the science of skiing is essential to a successful return to alpine skiing...
April 2012: Journal of Orthopaedic and Sports Physical Therapy
Barry P Boden, Frances T Sheehan, Joseph S Torg, Timothy E Hewett
Significant advances have recently been made in understanding the mechanisms involved in noncontact anterior cruciate ligament (ACL) injury. Most ACL injuries involve minimal to no contact. Female athletes sustain a two- to eightfold greater rate of injury than do their male counterparts. Recent videotape analyses demonstrate significant differences in average leg and trunk positions during injury compared with control subjects. These findings as well as those of cadaveric and MRI studies indicate that axial compressive forces are a critical component in noncontact ACL injury...
September 2010: Journal of the American Academy of Orthopaedic Surgeons
Thomas P Branch, Hermann O Mayr, Jon E Browne, John C Campbell, Amelie Stoehr, Cale A Jacobs
The clinical examination is a basic language of orthopaedics; it is how orthopaedic surgeons communicate with one another. However, each surgeon speaks a different dialect that has been influenced by where and with whom that surgeon trained, as well as that person's own experiences. Because of the inherent variability in the magnitude, direction, and rate of force application during the clinical examination, manual arthrometers were developed in an attempt to more consistently quantify the clinical examination...
July 2010: Arthroscopy: the Journal of Arthroscopic & related Surgery
Emilija Dubljanin-Raspopović, Marko Bumbasirević, Gordana Devecerski, Dragana Matanović
INTRODUCTION: Limited surgical technology in treating injuries of the anterior cruciate ligament (ACL) in the past led to the development of a huge number of functional braces. Today, with the advance of the surgical techniques and a more aggressive rehabilitation approach in the postoperative course the use of functional braces after the ACL reconstruction is seriously questioned. The aim of this study was to review the basic functions of functional braces. Mechanical, and biomechanical functions of functional braces have been described, the psychological aspect of wearing them, their impact on thigh circumference, functional performance, muscle activity and postural control and propriocepation have also been addressed...
September 2009: Medicinski Pregled
Oscar Martel, Juan F Cárdenes, Gerardo Garcés, José A Carta
Anterior cruciate ligament (ACL) reconstruction is one of the most important aspects of knee surgery. For this purpose, several fixation devices have been developed, although the interference screw is the most frequently used. The most typical biomechanical test of these devices consists of placing them in a testing machine and subjecting them to a pull-out test. However, insufficient attention has been paid to the influence of the displacement test rate on the mechanical properties of the fixation system. The aim of this study is to compare the influence of the crosshead rate in the biomechanical test of two different devices for the fixation of ACL tendon grafts...
November 2009: Journal of Applied Biomechanics
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