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Medial patellofemoral ligament

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https://www.readbyqxmd.com/read/28224070/combined-particulated-juvenile-cartilage-allograft-transplantation-and-medial-patellofemoral-ligament-reconstruction-for-symptomatic-chondral-defects-in-the-setting-of-recurrent-patellar-instability
#1
Armin Arshi, Dean Wang, Kristofer J Jones
Successful management of patellar osteochondral lesions has proved difficult, with unreliable outcomes reported using traditional cartilage repair and restoration procedures. Unique considerations for this type of defect include the multiplanar contours of the articular surface of the patella, high compressive and shear forces with knee range of motion that may disrupt graft healing, and the potential need for concomitant surgery to address patellar malalignment and instability. We describe our preferred method for treatment of a symptomatic chondral defect in the setting of recurrent patellar instability using particulated juvenile articular cartilage allograft transplantation and medial patellofemoral ligament reconstruction with semitendinosus allograft...
October 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28214426/reduced-step-length-reduces-knee-joint-contact-forces-during-running-following-anterior-cruciate-ligament-reconstruction-but-does-not-alter-inter-limb-asymmetry
#2
Collin D Bowersock, Richard W Willy, Paul DeVita, John D Willson
BACKGROUND: Anterior cruciate ligament reconstruction is associated with early onset knee osteoarthritis. Running is a typical activity following this surgery, but elevated knee joint contact forces are thought to contribute to osteoarthritis degenerative processes. It is therefore clinically relevant to identify interventions to reduce contact forces during running among individuals after anterior cruciate ligament reconstruction. The primary purpose of this study was to evaluate the effect of reducing step length during running on patellofemoral and tibiofemoral joint contact forces among people with a history of anterior cruciate ligament reconstruction...
February 10, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28210789/medial-patellofemoral-ligament-mpfl-reconstruction-in-combination-with-a-modified-grammont-technique-leads-to-favorable-mid-term-results-in-adolescents-with-recurrent-patellofemoral-dislocations
#3
Helmut Wegmann, Christoph Würnschimmel, Tanja Kraus, Georg Singer, Robert Eberl, Holger Till, Matthias Sperl
PURPOSE: The aim of the present study is to present the outcome of a cohort of adolescent patients with trochlear dysplasia and elevated tibial tuberosity trochlear groove (TTTG) distance suffering from recurrent patellar dislocation. Treatment consisted of medial patellofemoral ligament (MPFL) reconstruction and a modified Grammont procedure. METHODS: MRI examinations were obtained pre- and postoperatively. Trochlear dysplasia was classified according to Déjour, and TTTG was measured on MRI...
February 16, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28210659/medial-patellofemoral-ligament-reconstruction-femoral-tunnel-accuracy-relationship-to-disease-specific-quality-of-life
#4
Laurie A Hiemstra, Sarah Kerslake, Mark Lafave
BACKGROUND: Medial patellofemoral ligament (MPFL) reconstruction is a procedure aimed to reestablish the checkrein to lateral patellar translation in patients with symptomatic patellofemoral instability. Correct femoral tunnel position is thought to be crucial to successful MPFL reconstruction, but the accuracy of this statement in terms of patient outcomes has not been tested. PURPOSE: To assess the accuracy of femoral tunnel placement in an MPFL reconstruction cohort and to determine the correlation between tunnel accuracy and a validated disease-specific, patient-reported quality-of-life outcome measure...
February 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28193295/biomechanical-comparison-of-single-and-double-bundle-medial-patellofemoral-ligament-reconstruction
#5
Qing Wang, Wenhan Huang, Daozhang Cai, Huayang Huang
BACKGROUND: Recurrent patellar dislocation is common clinically, primarily in adolescents. However, the biomechanical properties of single- and double-bundle medial patellofemoral ligament (MPFL) reconstruction remain poorly understood. METHODS: Six fresh frozen adult cadaveric knee specimens were obtained for this study. Each specimen was fixed at 0° to test the force needed when the patella was laterally shifted 10 mm at a speed of 0.5 mm/s, and the test was repeated three times...
February 13, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28192824/accuracy-and-learning-curve-of-femoral-tunnel-placement-in-medial-patellofemoral-ligament-reconstruction
#6
Laurie Anne Hiemstra, Sarah Kerslake, Catherine L O'Brien, Mark R Lafave
The purpose of this study was to assess the accuracy of femoral tunnel placement in a medial patellofemoral ligament reconstruction (MPFL-R) cohort. The secondary purpose was to establish the evidence of a learning curve to achieve acceptable femoral tunnel placement during MPFL-R. Two surgeons, using lateral radiographs, assessed 73 subjects post-MPFL-R. Femoral tunnel accuracy and direction of tunnel error were measured in relation to Schöttle's point (A-T distance). Interrater reliability (intraclass correlation coefficient 2,k) of these measures was calculated...
February 13, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28178962/the-outcomes-of-the-modified-fulkerson-osteotomy-procedure-to-treat-habitual-patellar-dislocation-associated-with-high-grade-trochlear-dysplasia
#7
Hong Chen, Daohong Zhao, Jingming Xie, Qihui Duan, Jun Zhang, Zhidan Wu, Jia Jiang
BACKGROUND: Habitual patellar dislocation is not common in clinical practice, but it has a deep impact on the patient's lifestyle and movement. There has been no large case-control study on habitual patellar dislocation, and the management of it is still controversial. The aim of this study was to observe the efficacy of the modified Fulkerson procedure on patients with habitual patellar dislocation with high-grade trochlear dysplasia without trochleoplasty and to evaluate the results of this procedure...
February 8, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28149901/reconstruction-of-the-medial-patellofemoral-ligament-reconstruction-for-patients-with-recurrent-patellar-dislocation-review-of-surgical-techniques-and-tips-to-achieve-successful-reconstruction
#8
COMMENT
Giacomo Placella, Valerio Pace, Paul Foster
No abstract text is available yet for this article.
December 2016: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28148656/adolescent-patellar-instability-current-concepts-review
#9
REVIEW
D Clark, A Metcalfe, C Wogan, V Mandalia, J Eldridge
Patellar instability most frequently presents during adolescence. Congenital and infantile dislocation of the patella is a distinct entity from adolescent instability and measurable abnormalities may be present at birth. In the normal patellofemoral joint an increase in quadriceps angle and patellar height are matched by an increase in trochlear depth as the joint matures. Adolescent instability may herald a lifelong condition leading to chronic disability and arthritis. Restoring normal anatomy by trochleoplasty, tibial tubercle transfer or medial patellofemoral ligament (MPFL) reconstruction in the young adult prevents further instability...
February 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28146393/medial-patellofemoral-ligament-reconstruction-combined-with-distal-realignment-for-recurrent-dislocations-of-the-patella
#10
Iswadi Damasena, Murray Blythe, David Wysocki, David Kelly, Peter Annear
BACKGROUND: Tibial tubercle transfer (TTT) and medial patellofemoral ligament (MPFL) reconstruction have both shown, either in isolation or in combination, to provide improved patellofemoral joint (PFJ) stability. There are few studies that provide evidence that this remains true in the long term. PURPOSE: To compare the long-term results of patellar instability after TTT with and without MPFL reconstruction in 2 randomized groups. STUDY DESIGN: Randomized controlled trial; Level of evidence, 1...
February 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28144716/bicompartmental-individualized-knee-replacement-use-of-patient-specific-implants-and-instruments-iduo%C3%A2
#11
A F Steinert, J Beckmann, B M Holzapfel, M Rudert, J Arnholdt
OBJECTIVE: Bicompartmental knee replacement in patients with combined osteoarthritis (OA) of the medial or lateral and patellofemoral compartment. Patient-specific instruments and implants (ConforMIS iDuo™) with a planning protocol for optimal implant fit. INDICATIONS: Bicompartmental OA of the knee (Kellgren & Lawrence stage IV) affecting both the medial or lateral and patellofemoral compartment after unsuccessful conservative or joint-preserving surgery. CONTRAINDICATIONS: Tricompartmental OA, knee ligament instabilities, knee deformities >15° (varus, valgus, extension deficit)...
February 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28138717/-patellofemoral-arthroplasty
#12
M Cotic, P Forkel, A B Imhoff
OBJECTIVE: Isolated resurfacing of the trochlea using an inlay prosthesis without changing the complex kinematics of the patellofemoral joint. INDICATIONS: Symptomatic, isolated patellofemoral osteoarthritis or isolated osteochondral lesions, failed conservative and cartilage regeneration procedures. No or concurrently corrected ligament instability, tibiofemoral and patellofemoral malalignment. CONTRAINDICATIONS: Symptomatic patellofemoral osteoarthritis, inflammatory joint disease, chondrocalcinosis, chronic pain syndromes, active infections or knee ankylosis...
February 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28127647/-reconstruction-of-the-medial-patellofemoral-ligament-after-lower-leg-amputation
#13
M Schulz, R Schwesig, H Siekmann, E Esmer, L Irlenbusch
The reconstruction of the medial patellofemoral ligament has been an increasingly popular approach for patellar instability over the last ten years. It is a conglomeration of symptoms with varying degree of severity. For pinpointed surgery planning, magnetic resonance imaging is now the obligate diagnosic tool. Therefore, in the preoperative stage, collateral pathology can be observed.
January 26, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28118233/a-novel-functional-correction-method-for-habitual-patellar-dislocation-using-autologous-hamstring-tendon-a-case-report
#14
Yasunari Ikuta, Nobuo Adachi, Masataka Deie, Masakazu Ishikawa, Atsuo Nakamae, Mitsuo Ochi
Habitual patellar dislocation is an uncommon condition. In this case, a patient demonstrated lateral patellar dislocation in the middle or terminal range of flexion. A functional correction of the patella was devised so that the fixation site of the autologous graft on the femur was able to stabilize the patella selectively during the middle or terminal range of flexion. It is not the anatomical medial patellofemoral ligament attachment of the femur that is essential, but that a relevant fixation point on the femur should be sought in each patient to obtain stabilization of the patella to reverse habitual patellar dislocation...
January 21, 2017: Journal of Pediatric Orthopedics. Part B
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
#15
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/28045869/why-do-patellofemoral-stabilization-procedures-fail-keys-to-success
#16
Nick Caplan, Islam Nassar, Bobby Anand, Deiary F Kader
In recent years, surgical interventions for patellofemoral joint instability have gained popularity, possibly revitalized by the recent advances in our understanding of patellofemoral joint instability and the introduction of a number of new surgical procedures. This rise in surgical intervention has brought about various complications. In this review article, we present the complications that are associated with 5 main surgical procedures to stabilize the patella-medial patellofemoral ligament reconstruction, tibial tubercle osteotomy, trochleoplasty, lateral release/lateral retinacular lengthening, and derotation osteotomies...
March 2017: Sports Medicine and Arthroscopy Review
https://www.readbyqxmd.com/read/28028571/correlation-analysis-between-injury-patterns-of-medial-patellofemoral-ligament-and-vastus-medialis-obliquus-after-acute-first-time-lateral-patellar-dislocation
#17
Guang-Ying Zhang, Lei Zheng, Hao Shi, Wei Liu, Li Zhang, Su-Hui Qu, Zheng-Wu Bai, Hong-Yu Ding
PURPOSE: To evaluate the correlation between injury patterns of the medial patellofemoral ligament (MPFL) and vastus medialis obliquus (VMO) after acute first-time lateral patellar dislocation (LPD) in adults. METHODS: Magnetic resonance imaging (MRI) was prospectively performed in 132 consecutive adults with acute first-time LPD. Images were acquired and evaluated using standardized protocols. Injury patterns of MPFL were grouped by location and severity for analysis of the prevalence of VMO injury...
December 27, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28028569/functional-testing-and-return-to-sport-following-stabilization-surgery-for-recurrent-lateral-patellar-instability-in-competitive-athletes
#18
Aaron J Krych, Michael P O'Malley, Nick R Johnson, Rohith Mohan, Timothy E Hewett, Michael J Stuart, Diane L Dahm
PURPOSE: Medial patellofemoral ligament (MPFL) reconstruction and tibial tubercle osteotomy are commonly used to treat recurrent lateral patellar instability, yet there are limited available data on return to sport (RTS) following these procedures. The purpose of this study is to evaluate patient factors associated with excellent functional outcomes, including successful RTS, following surgical stabilization including MPFL reconstruction in competitive athletes with recurrent lateral patellar instability...
December 27, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28005409/safe-drilling-paths-in-the-distal-femoral-epiphysis-for-pediatric-medial-patellofemoral-ligament-reconstruction
#19
Cynthia V Nguyen, Lutul D Farrow, Raymond W Liu, Allison Gilmore
BACKGROUND: Anatomic surgical reconstruction of the medial patellofemoral ligament (MPFL) has been popularized for the treatment of recurrent patellar instability in the skeletally immature population. Previous anatomic studies have found that the femoral attachment point of the MPFL is very close to the distal femoral physis. PURPOSE: To establish the safe angles for drilling the distal femoral epiphysis for MPFL graft placement. STUDY DESIGN: Descriptive laboratory study...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27999505/osteochondral-allograft-transplantation-for-femoral-trochlear-dysplasia
#20
Dharmpal V Vansadia, James R Heltsley, Scott Montgomery, Misty Suri, Deryk G Jones
BACKGROUND: The risk factors for patellofemoral joint instability include laxity of medial patellar restraints, abnormal limb geometry, femoral and tibial malrotation, patella alta, and trochlear dysplasia. Femoral trochlear dysplasia is characterized by a hypoplastic or shallow trochlear groove. CASE REPORT: We report the case of a 31-year-old female with trochlear dysplasia and recurrent patella dislocations, laxity of the medial patellofemoral ligament (MPFL), and high-grade chondromalacia of the trochlea and the patella...
2016: Ochsner Journal
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