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https://www.readbyqxmd.com/read/28454998/finite-element-analysis-of-the-biomechanical-effects-of-3-posterolateral-corner-reconstruction-techniques-for-the-knee-joint
#1
Kyoung-Tak Kang, Yong-Gon Koh, Juhyun Son, Sung-Jae Kim, Sungryul Choi, Moonki Jung, Sung-Hwan Kim
PURPOSE: To compare the forces exerted on the cruciate ligaments and the contact stresses on the tibiofemoral (TF) and patellofemoral (PF) joints with respect to 3 different tibial- and fibular-based posterolateral corner (PLC) reconstructions under dynamic loading conditions. METHODS: A subject-specific finite element knee model was developed by using 3-dimensional anatomic data from motion captures in gait and squat activities, including in vivo knee joint kinematics and muscle forces for the single subject...
April 25, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28451605/the-impact-of-osseous-malalignment-and-realignment-procedures-in-knee-ligament-surgery-a-systematic-review-of-the-clinical-evidence
#2
REVIEW
Thomas Tischer, Jochen Paul, Dietrich Pape, Michael T Hirschmann, Andreas B Imhoff, Stefan Hinterwimmer, Matthias J Feucht
BACKGROUND: Failure rates of knee ligament surgery may be high, and the impact of osseous alignment on surgical outcome remains controversial. Basic science studies have demonstrated that osseous malalignment can negatively affect ligament strain and that realignment procedures may improve knee joint stability. HYPOTHESIS/PURPOSE: The purpose of this review was to summarize the clinical evidence concerning the impact of osseous malalignment and realignment procedures in knee ligament surgery...
March 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28447141/the-iliotibial-band-and-anterolateral-capsule-have-a-combined-attachment-to-the-segond-fracture
#3
Marcio Albers, Humza Shaikh, Elmar Herbst, Kentaro Onishi, Kanto Nagai, Volker Musahl, Freddie H Fu
The purpose of this report was to describe the injury mechanism, surgical findings, and outcomes in a 21-year-old professional female football player who presented with a complete anterior cruciate ligament (ACL) rupture and Segond fracture. Interview and video analysis were performed to elicit the injury mechanism. Clinical examination and imaging revealed a complete ACL tear, Segond fracture, lateral meniscus tear, MCL sprain, and posterolateral corner sprain. Examination under anaesthesia revealed Grade 2 pivot shift and varus/valgus instability...
April 26, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28424850/incidence-and-mri-characterization-of-the-spectrum-of-posterolateral-corner-injuries-occurring-in-association-with-acl-rupture
#4
Eduardo Frois Temponi, Lúcio Honório de Carvalho Júnior, Adnan Saithna, Mathieu Thaunat, Bertrand Sonnery-Cottet
OBJECTIVE: To determine the incidence and MRI characteristics of the spectrum of posterolateral corner (PLC) injuries occurring in association with anterior cruciate ligament (ACL) rupture. MATERIALS AND METHODS: We carried out a level IV, retrospective case series study. All patients clinically diagnosed with an ACL rupture between July 2015 and June 2016 who underwent MRI of the knee were included in the study. In addition to standard MRI knee reporting, emphasis was placed on identifying injury to the PLC and a description of involvement of these structures by two musculoskeletal radiologists...
April 20, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28409145/extra-articular-and-transcutaneous-migration-of-the-poly-l-d-lactide-interference-screw-after-popliteal-tendon-reconstruction
#5
Camilo Partezani Helito, Noel O Foni, Marcelo Batista Bonadio, José Ricardo Pécora, Marco Kawamura Demange, Fabio Janson Angelini
Knee ligament reconstructions are commonly performed orthopedic procedures. Graft fixation is generally performed with metallic or absorbable interference screws. In a recent study, only ten reports of screw migration were retrieved; of these, only one was not related to the anterior cruciate ligament, and the majority was related to the use of poly-l-lactic acid (PLLA) screws. Only one case retrieved in the literature reported screw migration in reconstructions of the posterolateral corner, and that was to the intra-articular region...
March 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28361277/the-effect-of-a-dynamic-pcl-brace-on-patellofemoral-compartment-pressures-in-pcl-and-pcl-plc-deficient-knees
#6
Tyler Welch, Thomas Keller, Ruben Maldonado, Melodie Metzger, Karen Mohr, Ronald Kvitne
BACKGROUND: The natural history of posterior cruciate ligament (PCL) deficiency includes the development of arthrosis in the patellofemoral joint (PFJ). The purpose of this biomechanical study was to evaluate the hypothesis that dynamic bracing reduces PFJ pressures in PCL- and combined PCL/posterolateral corner (PLC)-deficient knees. STUDY DESIGN: Controlled Laboratory Study. METHODS: Eight fresh frozen cadaveric knees with intact cruciate and collateral ligaments were included...
December 2017: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/28355671/multiligamentous-injury-of-the-knee-mri-diagnosis-and-injury-patterns
#7
Barry Glenn Hansford, Corrie M Yablon
Anterior cruciate and posterior cruciate injuries rarely occur in isolation and are often associated with injuries to the secondary or supporting structures that provide stability against rotational forces. These structures include the posterolateral and posteromedial corner ligaments and tendons, as well as the anterolateral ligament. If injuries to these secondary structures are not appreciated at the time of cruciate ligament reconstruction, an isolated cruciate ligament reconstruction may be predisposed to early failure...
April 2017: Seminars in Musculoskeletal Radiology
https://www.readbyqxmd.com/read/28343807/dial-test-unrecognized-predictor-of-anterior-cruciate-ligament-deficiency
#8
Brian Forsythe, Bryan M Saltzman, Gregory L Cvetanovich, Michael J Collins, Thomas A Arns, Nikhil N Verma, Brian J Cole, Bernard R Bach
PURPOSE: To evaluate the effect of isolated anterior cruciate ligament (ACL) injury on tibial external rotation as measured by the dial test. METHODS: Twenty-seven consecutive patients scheduled to undergo a primary ACL reconstruction were prospectively evaluated. Physical examination and magnetic resonance imaging findings were analyzed to exclude multiligamentous injury. The dial test was performed with the patient under anesthesia with a goniometer on both the affected and unaffected knees at 30° and 90°...
March 23, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28268001/return-to-duty-following-combat-related-multi-ligamentous-knee-injury
#9
Aaron E Barrow, Andrew J Sheean, Travis C Burns
INTRODUCTION: This retrospective cohort study characterized injury patterns, treatment practices, and identified the return to duty (RTD) rate following combat-related multi-ligament knee injuries (MLKI). PATIENTS AND METHODS: We evaluated injury characteristics and treatment methods of 46 military service members who had sustained a MLKI during combat activity. The primary clinical outcome measure was ability to return to active military duty. Secondary outcomes included subjective pain score, knee motion, knee instability, and use of ambulatory assistive device...
February 22, 2017: Injury
https://www.readbyqxmd.com/read/28160014/the-incidence-and-clinical-outcomes-of-peroneal-nerve-injuries-associated-with-posterolateral-corner-injuries-of-the-knee
#10
T J Ridley, Mark A McCarthy, Matthew J Bollier, Brian R Wolf, Annunziato Amendola
PURPOSE: The purpose of the study was to investigate the incidence of complete and partial peroneal nerve injuries in patients with posterolateral corner (PLC) knee injuries; additionally, to compare patient-reported outcomes among patients with and without peroneal nerve injury and to examine the factors that predict the recovery of nerve function. METHODS: A retrospective chart review was performed to identify patients who underwent PLC reconstruction or repair from 2000 to 2012 with a minimum 6-month clinical follow-up...
February 3, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28077395/the-effects-of-posterior-cruciate-ligament-deficiency-on-posterolateral-corner-structures-under-gait-and-squat-loading-conditions-a-computational-knee-model
#11
K-T Kang, Y-G Koh, M Jung, J-H Nam, J Son, Y H Lee, S-J Kim, S-H Kim
OBJECTIVES: The aim of the current study was to analyse the effects of posterior cruciate ligament (PCL) deficiency on forces of the posterolateral corner structure and on tibiofemoral (TF) and patellofemoral (PF) contact force under dynamic-loading conditions. METHODS: A subject-specific knee model was validated using a passive flexion experiment, electromyography data, muscle activation, and previous experimental studies. The simulation was performed on the musculoskeletal models with and without PCL deficiency using a novel force-dependent kinematics method under gait- and squat-loading conditions, followed by probabilistic analysis for material uncertain to be considered...
January 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28065990/delayed-diagnosis-of-an-isolated-posterolateral-corner-injury-a-case-report
#12
Patrick Welsh, Christopher DeGraauw, David Whitty
INTRODUCTION: Isolated injuries to the posterolateral corner of the knee are a rare and commonly missed injury associated with athletic trauma, motor vehicle accidents, and falls. Delayed or missed diagnoses can negatively impact patient prognosis, contributing to residual instability, chronic pain, and failure of surgical repair to other ligaments. CASE PRESENTATION: A 44-year-old male CrossFit athlete presented with a history of two non-contact hyperextension injuries to his left knee while walking on ice...
December 2016: Journal of the Canadian Chiropractic Association
https://www.readbyqxmd.com/read/28058447/-posterior-cruciate-ligament-injuries
#13
K F Schüttler, E Ziring, S Ruchholtz, T Efe
Posterior cruciate ligament (PCL) injuries are still often overlooked and treatment of a ruptured PCL is inherently different in comparison to anterior cruciate ligaments (ACL). Conservative treatment is the first-line therapy for acute isolated PCL injuries leading to good clinical and biomechanical results. Injuries to the PCL combined with rupture of other stabilizing ligaments, such as the collateral ligaments or the posterolateral corner of the knee joint are treated surgically. The same is true for high grade chronic PCL insufficiency...
January 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28002906/tears-of-popliteomeniscal-fascicles-diagnostic-and-clinical-implications-a-review-of-the-evidence
#14
R Papalia, R Simonetta, G Di Vico, G Torre, L Saccone, J Espregueira-Mendes, V Denaro
Postero-lateral corner of the knee is composed of several structures including the popliteo-meniscal fascicles (PMFs). These fibrous structures form a stable ligamentous complex around the popliteus tendon, which stabilize the lateral meniscus, increasing the strength of postero-lateral corner. Studies were retrieved through an electronic search of CINAHL, EMBASE, and Pub-Med, until May 2016. Studies in English, Italian, French, and Spanish were considered for inclusion. Randomized controlled trials, prospective and retrospective comparative studies, case series, and case reports were included...
October 2016: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/27984448/novel-spiked-washer-repair-is-biomechanically-superior-to-suture-and-bone-tunnels-for-arcuate-fracture-repair
#15
Saman Vojdani, Laviel Fernandez, Jian Jiao, Tyler Enders, Steven Ortiz, Liangjun Lin, Yi-Xian Qin, David E Komatsu, James Penna, Charles J Ruotolo
OBJECTIVES: Injuries to the posterolateral corner of the knee can lead to chronic degenerative changes, external rotation instability, and varus instability if not repaired adequately. A proximal fibula avulsion fracture, referred to as an arcuate fracture, has been described in the literature, but a definitive repair technique has yet to be described. The objective of this study was to present a novel arcuate fracture repair technique, using a spiked-washer with an intramedullary screw, and to compare its biomechanical integrity to a previously described suture and bone tunnel method...
March 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/27871653/surgical-management-and-treatment-of-the-anterior-cruciate-ligament-posterolateral-corner-injured-knee
#16
REVIEW
Nicholas I Kennedy, Christopher M LaPrade, Robert F LaPrade
Posterolateral knee injuries occur more commonly than in the past. These injuries most commonly occur concurrent with cruciate ligament tears. The main stabilizers of the posterolateral knee are the fibular collateral ligament, the popliteus tendon, and the popliteofibular ligament. These static stabilizers function to prevent increased varus, external rotation, and coupled posterolateral rotation of the knee. The most important clinical tests to diagnose posterolateral knee injuries are the varus stress test, posterolateral drawer, and dial tests...
January 2017: Clinics in Sports Medicine
https://www.readbyqxmd.com/read/27806878/validation-of-varus-stress-radiographs-for-anterior-cruciate-ligament-and-posterolateral-corner-knee-injuries-a-biomechanical-study
#17
Lucas S McDonald, Robert A Waltz, Joseph R Carney, Christopher B Dewing, Joseph R Lynch, Dean B Asher, Dustin J Schuett, Lance E LeClere
PURPOSE: The purpose of this study was to determine the effect of isolated anterior cruciate ligament (ACL) insufficiency on the radiographic varus stress test, and to provide reference data for the increase in lateral compartment opening under varus stress for a combined ACL and PLC injury. METHODS: Ten cadaveric lower extremities were fixed to a jig in 20° of knee flexion. Twelve Newton-meter (Nm) and clinician-applied varus loads were tested, first with intact knee ligaments, followed by sequential sectioning of the ACL, fibular collateral ligament (FCL), popliteus tendon and the popliteofibular ligament (PFL)...
December 2016: Knee
https://www.readbyqxmd.com/read/27726747/unraveling-the-posterolateral-corner-of-the-knee
#18
Humberto G Rosas
Although rare, posterolateral corner (PLC) injuries can result in sustained instability and failed cruciate ligament reconstruction if they are not diagnosed. The anatomy of the PLC was once thought to be perplexing and esoteric-in part because of the varying nomenclature applied to this region in the literature, which added unnecessary complexity. More recently, three major structures have been described as the primary stabilizers of the PLC on the basis of biomechanical study findings: the lateral collateral ligament, popliteus tendon, and popliteofibular ligament...
October 2016: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/27709059/medial-opening-wedge-proximal-tibial-osteotomy
#19
Jorge Chahla, Chase S Dean, Justin J Mitchell, Gilbert Moatshe, Raphael Serra Cruz, Robert F LaPrade
Genu varus malalignment can lead to medial compartment overload and progression of ipsilateral compartment osteoarthritis. To slow this process, a medial opening wedge proximal tibial osteotomy (PTO) can be performed. This type of PTO is indicated in patients with genu varus malalignment and isolated medial compartment osteoarthritis of the knee, prior to or concurrent with medial compartment cartilage procedures or meniscal transplants, chronic posterolateral corner deficiency, or chronic anterior cruciate ligament deficiency...
August 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/27703824/spontaneous-recurrent-hemarthrosis-of-the-knee-a-report-of-two-cases-with-a-source-of-bleeding-detected-during-arthroscopic-surgery-of-the-knee-joint
#20
Eisuke Nomura, Hisatada Hiraoka, Hiroya Sakai
We report two cases of the spontaneous recurrent hemarthrosis of the knee. In these cases lateral meniscus was severely torn and a small tubular soft tissue with pulsation was identified on the synovium in the posterolateral corner during arthroscopic surgery of the knee joint. Gentle grasping of this tissue by forceps led to pulsating bleeding, which stopped by electrocoagulation. This soft tissue was considered a source of bleeding, since no recurrence of hemarthrosis was observed for more than four years after surgery...
2016: Case Reports in Orthopedics
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