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Medial patellofemoral ligament

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https://www.readbyqxmd.com/read/28642979/-medial-opening-wedge-high-tibial-osteotomy
#1
REVIEW
P Niemeyer, A Stöhr, M Köhne, A Hochrein
OBJECTIVE: Reduction of the load to the medial compartment in patients with medial knee osteoarthritis and varus malalignment. Unloading of the posterolateral complex in varus deformity with complex ligamentous laxity. INDICATIONS: Medial knee osteoarthritis and varus malalignment with largely intact lateral and patellofemoral joint aspect. Complex ligament insufficiency combined with varus deformity. CONTRAINDICATIONS: Substantially impaired range of motion...
June 22, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28628800/increased-internal-femoral-torsion-can-be-regarded-as-a-risk-factor-for-patellar-instability-a-biomechanical-study
#2
Peter Kaiser, Werner Schmoelz, Philip Schoettle, Marit Zwierzina, Christian Heinrichs, Rene Attal
BACKGROUND: Increased internal femoral torsion is regarded as a risk factor for patellar instability. Biomechanical investigations confirming this hypothesis are missing. METHODS: Eight fresh-frozen cadaver knees were tested on a specially designed simulator. Patellar motion and patellofemoral pressure were evaluated for 0°, 10°, and 20° of increased internal and external femoral torsion with native and with transected medial patellofemoral ligaments used to simulate patellar instability...
June 10, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28601942/anatomic-reconstruction-of-the-medial-patellofemoral-ligament-in-children-and-adolescents-using-a-pedicled-quadriceps-tendon-graft-shows-favourable-results-at-a-minimum-of-2-year-follow-up
#3
Manfred Nelitz, Jens Dreyhaupt, Sean Robert March Williams
PURPOSE: In adults, reconstruction of the medial patellofemoral ligament (MPFL) has shown good results. Treatment for recurrent patellar instability in children and adolescents with open growth plates, however, requires alternative MPFL reconstruction techniques. This study presents the outcomes of a minimally invasive technique for anatomic reconstruction of the MPFL in children using a pedicled superficial quadriceps tendon graft, hardware-free patellar graft attachment, and anatomic femoral fixation that spares the distal femoral physis...
June 10, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28594498/bicompartmental-knee-arthroplasty
#4
Nirav H Amin, Travis Scudday, Fred D Cushner
Knee arthritis is one of the leading causes of disability and functional limitations in the United States and worldwide. Total knee arthroplasty results in good functional outcomes and high survival rates in patients who have tricompartmental arthritis. Bicompartmental knee arthroplasty is being used more often in patients who have arthritis that is isolated to two compartments: the patellofemoral compartment and either the medial or the lateral compartment. Bicompartmental knee arthroplasty preserves the kinematics, ligaments, and bone stock of the knee and is a good option for younger, active, high-demand patients who wish to return to their previous level of activity...
February 15, 2017: Instructional Course Lectures
https://www.readbyqxmd.com/read/28593102/rehabilitation-following-medial-patellofemoral-ligament-reconstruction-for-patellar-instability
#5
Robert C Manske, Daniel Prohaska
Patellar instability is a common problem seen by physical therapists, athletic trainers and orthopedic surgeons. Although following an acute dislocation, conservative rehabilitation is usually the first line of defense; refractory cases exist that may require surgical intervention. Substantial progress has been made in the understanding of the medial patellofemoral ligament (MPFL) and its role as the primary stabilizer to lateral patellar displacement. Medial patellofemoral ligament disruption is now considered to be the essential lesion following acute patellar dislocation due to significantly high numbers of ruptures following this injury...
June 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28508959/surgical-treatment-of-patellar-instability-clinical-and-radiological-outcome-after-medial-patellofemoral-ligament-reconstruction-and-tibial-tuberosity-medialisation
#6
Stefan Lobner, Christine Krauss, Frank Reichwein, Thilo Patzer, Wolfgang Nebelung, Arne J Venjakob
INTRODUCTION: The aim of this retrospective study was to analyse clinical and radiological outcome after medial patellofemoral ligament reconstruction (MPFLR) and tibial tuberosity medialisation (TTM) in patients with recurrent patellar instability. MATERIALS AND METHODS: Thirty-five patients were included between 2008 and 2012. According to defined criteria such as tibial tuberosity-trochlear groove (TTTG) distance, hyperpression on the lateral patella facet and lateral retropatellar cartilage damage either MPFLR (group A) or TTM (group B) was performed: 18 patients underwent TTM, the other 17 patients underwent MPFLR...
May 16, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28493040/stability-of-capsule-closure-and-postoperative-anterior-knee-pain-after-medial-parapatellar-approach-in-tka
#7
Armin Keshmiri, Fabian Dotzauer, Clemens Baier, Günther Maderbacher, Joachim Grifka, Ernst Sendtner
PURPOSE: Anterior knee pain after total knee arthroplasty (TKA) remains a widely discussed postoperative complication. In contrast to sports traumatology, the role of the dissected medial patellofemoral ligament (MPFL) using a medial parapatellar approach in TKA has not been discussed so far. In the present study, it was hypothesized that the attempted repair of the MPFL in TKA by simple closure of the joint capsule may not be successful in some cases, causing anterior knee pain. Furthermore, it was hypothesized, that the success of repair might be influenced by femoral component rotation...
May 10, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28459754/rehabilitation-after-medial-patellofemoral-ligament-reconstruction
#8
Terrence G McGee, Andrew J Cosgarea, Kevin McLaughlin, Miho Tanaka, Ken Johnson
Patellar instability resulting from subluxation or dislocation is a painful and commonly recurring condition. Retinacular restraints control patellar tracking, limiting the movement of the patella in the trochlear groove. The medial patellofemoral ligament (MPFL) is considered the main soft tissue stabilizer against lateral displacement. Few studies of patellar instability discuss rehabilitation after MPFL reconstruction. In this review, we discuss the phases of rehabilitation after MPFL reconstruction, typical interventions by rehabilitation specialists, and patient-specific guidelines for return to prior level of function...
June 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/28459753/surgical-options-for-patellar-stabilization-in-the-skeletally-immature-patient
#9
Jack Andrish
The surgical management of children and youth with patellar instability can be a challenging exercise. It is possible to identify the various pathoanatomies that coexist with and predispose to patellar instability and in so doing, it is possible to address some, but not all, of these pathoanatomies as part of the surgical management. Although reconstruction of the medial patellofemoral ligament has become a mainstay of treatment, it is not without potential complications. Understanding the importance of surgical technique as it relates to the unique anatomies involved is crucial...
June 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/28459747/biomechanical-analysis-of-tibial-tuberosity-medialization-and-medial-patellofemoral-ligament-reconstruction
#10
John J Elias, Bradley W Smith, Blake T Daney
Biomechanical studies are commonly performed to evaluate the influence of medial patellofemoral ligament (MPFL) reconstruction and tibial tuberosity medialization on patellar tracking and patellofemoral contact pressures. The most common method is in vitro simulation of knee function, but computational simulation of knee function and computational reconstruction of in vivo motion can also be utilized. The current review of the biomechanical literature indicates that MPFL reconstruction and tibial tuberosity medialization reduce lateral patellar tracking...
June 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/28459746/the-anatomy-of-the-medial-patellofemoral-complex
#11
Miho J Tanaka
The term "medial patellofemoral complex" (MPFC) was proposed to describe the static medial stabilizer of the patella, typically referred to as the medial patellofemoral ligament. In light of our increasing understanding of the attachment of its fibers to the quadriceps tendon in addition to the patella, the term MPFC is used in this article. The purpose of this article is to describe and discuss the anatomy of the MPFC.
June 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/28457794/partial-quadriceps-tendon-transfer-for-revision-medial-patellofemoral-ligament-reconstruction-a-new-surgical-technique
#12
Joan Leal-Blanquet, Eduard Alentorn-Geli, Raúl Torres-Claramunt, Joan Carles Monllau
Medial patellofemoral ligament (MPFL) reconstruction for patellofemoral instability is a common procedure. Although MPFL reconstruction is a successful procedure in terms of return to normal life or sports, revision cases are challenging due to previous holes into the patella or implants placed in the anatomical femoral insertion site. In this technical note, the use of a partial quadriceps tendon transfer to the adductor magnus tendon is presented as a good solution for revision cases to avoid the use of implants, bone drilling, use of allografts, or two-stage surgical procedures...
April 27, 2017: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/28456817/erratum-to-medial-patellofemoral-ligament-mpfl-reconstruction-in-combination-with-a-modified-grammont-technique-leads-to-favorable-mid-term-results-in-adolescents-with-recurrent-patellofemoral-dislocations
#13
Helmut Wegmann, Christoph Würnschimmel, Tanja Kraus, Georg Singer, Robert Eberl, Holger Till, Matthias Sperl
No abstract text is available yet for this article.
April 29, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28454185/patella-dislocation-in-children-and-adolescents
#14
Sven Höhne, Kristina Gerlach, Lars Irlenbusch, Mathias Schulz, Christian Kunze, Rainer Finke
Introduction Patellar dislocation is one of the commonest knee injuries in adolescents. Although treatment usually leads to good results, the influence of anatomical and functional factors on therapeutic strategy has been underestimated, especially in cases of recurrence. Patients and Methods The course of treatment has been analysed in 88 patients with 136 patellar dislocations. The importance of anatomical conditions was studied using X-ray and MRI findings. The treatment results were critically evaluated in comparison with current recommendations...
April 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28451595/medial-patellofemoral-ligament-repair-versus-reconstruction-for-recurrent-patellar-instability-two-year-results-of-an-algorithm-based-approach
#15
Jason L Dragoo, Michael Nguyen, Corey T Gatewood, Jacob D Taunton, Simon Young
BACKGROUND: Patellar instability remains a challenging problem for both the patient and surgeon. Medial patellofemoral ligament (MPFL) repair has historically had poor results, and due to this, there is currently a trend toward reconstruction. PURPOSE/HYPOTHESIS: This study was undertaken to investigate experience with repair versus reconstruction of the MPFL using a multifactorial treatment algorithm approach. Our hypothesis was that there will be no significant difference in outcome scores between patients in the MPFL repair and reconstruction groups...
March 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28437505/guidelines-for-treatment-of-lateral-patella-dislocations-in-skeletally-mature-patients
#16
Michael C Liebensteiner, Florian Dirisamer, Peter Balcarek, Philip Schoettle
The incidence of lateral patella dislocations is high, particularly in young females. Beside traumatic cases, many patients present with specific anatomical factors that predispose to lateral patella dislocations (torsional abnormalities of the femur or the tibia, trochlea dysplasia, patella alta, etc). It is of utmost importance to correct those pathologic factors during concomitant procedures as isolated reconstructions of the medial patellofemoral ligament would fail in the presence of severe anatomic risk factors...
March 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28437493/the-role-of-medial-patellofemoral-ligament-repair-and-imbrication
#17
Kyle R Duchman, Matthew J Bollier
Repair, reefing, and advancement of the medial patellofemoral ligament (MPFL) and medial retinacular structures can be performed as an isolated procedure or in conjunction with distal realignment procedures for patients with patellar instability. Although various operative techniques have been described, understanding the appropriate clinical indications and MPFL injury patterns ultimately determines the success or failure of the procedure. MPFL repair is best indicated in the acute setting, particularly if there is a patella- or femoral-based avulsion...
March 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28437491/correct-positioning-of-the-medial-patellofemoral-ligament-troubleshooting-in-the-operating-room
#18
M Tyrrell Burrus, Brian C Werner, Jourdan M Cancienne, David R Diduch
Medial patellofemoral ligament (MPFL) reconstruction is often required after failed nonoperative management of lateral patellar instability. It is important to properly re-create the native ligament to avoid altering patellofemoral biomechanics. Such alterations can cause knee stiffness, anterior knee pain, and patellofemoral chondrosis. Incorrect femoral location is the most common mistake that affects MPFL graft biomechanics. Authors have described multiple radiographic and anatomical landmarks that assist in determining the appropriate location, and time should be taken to accurately localize this position...
March 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28437490/the-diagnosis-and-initial-treatment-of-patellofemoral-disorders
#19
Alan C Merchant, John P Fulkerson, Wayne Leadbetter
Our purpose is to provide simple guidelines for the diagnosis and early care of patellofemoral disorders. Any clinician who treats knee problems, including family practitioners, rheumatologists, orthopedic surgeons, or physical therapists, must know how to make the correct diagnosis, or at least a presumptive diagnosis, at the initial visit. This can avoid unneeded and costly tests, ineffective treatment, and even damaging exercises and unnecessary surgery. The diagnosis of patellofemoral disorders is confusing because they can have many causes...
March 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28396049/acquired-femoral-flexion-deformity-due-to-physeal-injury-during-medial-patellofemoral-ligament-reconstruction
#20
Gerd Seitlinger, Philipp Moroder, Christian Fink, Guido Wierer
BACKGROUND: Reconstruction of the medial patellofemoral ligament (MPFL) is the most frequent surgical procedure performed in patients with patellar instability. Recently, concerns regarding physeal injury during femoral tunnel placement for anatomical MPFL reconstruction in children have been discussed. METHODS: This is the first case to report partial posterior physeal growth arrest and subsequent flexion deformity of the distal femur after MPFL reconstruction in a skeletally immature patient...
April 7, 2017: Knee
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