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effect of medial patellofemoral

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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
#1
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/28036322/effects-of-femoral-rotational-taping-on-dynamic-postural-stability-in-female-patients-with-patellofemoral-pain
#2
Chen-Yi Song, Jiu-Jenq Lin, Alison H Chang
OBJECTIVE: To investigate the effects of femoral rotational taping on task performance, dynamic postural control, and pain during the Star Excursion Balance Test (SEBT) in patients with patellofemoral pain (PFP) compared to healthy controls. DESIGN: Case-control study, pretest-posttest. SETTING: Laboratory. PARTICIPANTS: Twenty-four female participants (16 with PFP, 8 controls). INTERVENTIONS: Participants in both the PFP and control groups performed SEBT with no taping, sham taping, and femoral rotational taping...
October 10, 2016: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28028569/functional-testing-and-return-to-sport-following-stabilization-surgery-for-recurrent-lateral-patellar-instability-in-competitive-athletes
#3
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/27988165/increased-femoral-anteversion-influence-over-surgically-treated-recurrent-patellar-instability-patients
#4
Carlos Eduardo Franciozi, Luiz Felipe Ambra, Leonardo José Bernardes Albertoni, Pedro Debieux, Fernando Cury Rezende, Mauricio Ayres de Oliveira, Marcio de Castro Ferreira, Marcus Vinícius Malheiros Luzo
PURPOSE: To verify the influence that increased femoral anteversion (FA) has on patients with recurrent patellar instability (RPI) treated by anteromedialization tibial tubercle osteotomy (TTO) combined with medial patellofemoral ligament reconstruction (MPFLR) and to present the midterm outcomes of these patients. METHODS: From January 2008 to August 2013, skeletally mature patients with RPI and tibial tubercle (TT)-trochlear groove (TG) ≥ 17 mm who underwent anteromedialization TTO combined with MPFLR were evaluated for J sign, patellar glide, apprehension test, increased FA, Caton index, trochlea dysplasia, TT-TG, Kujala, International Knee Documentation Committee subjective knee evaluation form, and Tegner...
December 14, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27916580/annual-revision-rates-of-partial-versus-total-knee-arthroplasty-a-comparative-meta-analysis
#5
REVIEW
Harshvardhan Chawla, Jelle P van der List, Alexander B Christ, Maximiliano R Sobrero, Hendrik A Zuiderbaan, Andrew D Pearle
BACKGROUND: Utilization of unicompartmental knee arthroplasty (UKA) and patellofemoral arthroplasty (PFA) as alternatives to total knee arthroplasty (TKA) for unicompartmental knee osteoarthritis (OA) has increased. However, no single resource consolidates survivorship data between TKA and partial resurfacing options for each variant of unicompartmental OA. This meta-analysis compared survivorship between TKA and medial UKA (MUKA), lateral UKA (LUKA) and PFA using annual revision rate as a standardized metric...
December 1, 2016: Knee
https://www.readbyqxmd.com/read/27916578/patellar-component-design-influences-size-selection-and-coverage
#6
Charlie C Yang, Douglas A Dennis, Patrick G Davenport, Raymond H Kim, Todd M Miner, Derek R Johnson, Peter J Laz
BACKGROUND: Patellofemoral (PF) complications following total knee arthroplasty continue to occur. Outcomes are influenced by implant design, size and alignment in addition to patient factors. The objective of this study was to assess the effect of implant design, specifically round versus oval dome patellar components, on size selected and bony coverage in a population of 100 patients. METHODS: Intraoperative assessments of patella component size were performed using surgical guides for round and oval designs...
December 1, 2016: Knee
https://www.readbyqxmd.com/read/27904790/current-concepts-in-the-treatment-of-gross-patellofemoral-instability
#7
Grant Buchanan, LeeAnne Torres, Brian Czarkowski, Charles E Giangarra
: Patellofemoral instability is a painful and commonly recurring condition, which often must be managed surgically. Diagnosis can be aided by the use of a variety of physical exam signs, such as the Q angle, Beighton hypermobility score, glide test, J sign, patellar tilt test, and apprehension test. Imaging modalities including x-ray, CT, and MRI guide both diagnosis and management by revealing trochlear dysplasia, bony malalignment, and ligamentous injury that contribute to instability...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27796419/results-of-medial-patellofemoral-ligament-reconstruction-compared-with-trochleoplasty-plus-individual-extensor-apparatus-balancing-in-patellar-instability-caused-by-severe-trochlear-dysplasia-a-systematic-review-and-meta-analysis
#8
REVIEW
Peter Balcarek, Stephan Rehn, Nick R Howells, Jonathan D Eldridge, Keisuke Kita, David Dejour, Manfred Nelitz, Ingo J Banke, Delphine Lambrecht, Markus Harden, Tim Friede
PURPOSE: Many studies have reported satisfactory clinical outcomes and low redislocation rates after reconstruction of the medial patellofemoral ligament (MPFL) for the treatment of lateral patellar instability. Despite uncorrected severe trochlear dysplasia (Dejour type B to D) being acknowledged as a major reason for less favourable clinical outcomes and a higher incidence of patellar redislocations after an isolated MPFL reconstruction, the evidence for a deepening trochleoplasty procedure remains scarce in the current literature...
October 27, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27709116/dynamic-simulation-of-the-effects-of-graft-fixation-errors-during-medial-patellofemoral-ligament-reconstruction
#9
John J Elias, Michael J Kelly, Kathryn E Smith, Kenneth A Gall, Jack Farr
BACKGROUND: Medial patellofemoral ligament (MPFL) reconstruction is performed to prevent recurrent instability, but errors in femoral fixation can elevate graft tension. HYPOTHESIS: Errors related to femoral fixation will overconstrain the patella and increase medial patellofemoral pressures. STUDY DESIGN: Controlled laboratory study. METHODS: Five knees with patellar instability were represented with computational models...
September 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/27699726/modified-elmslie-trillat-procedure-for-recurrent-dislocation-of-the-patella
#10
Genya Mitani, Takashi Maeda, Tomonori Takagaki, Kosuke Hamahashi, Kenji Serigano, Yutaka Nakamura, Masato Sato, Joji Mochida
Many groups have reported good to excellent clinical outcomes of the Elmslie-Trillat (ET) procedure for recurrent dislocation of the patella. However, the mean follow-up period of these studies was no more than 5 years. We hypothesized that the long-term postoperative outcomes of the modified ET procedure for recurrent dislocation of the patella would be acceptable compared with those of other procedures. The long-term postoperative outcomes of patients treated with the modified ET procedure were examined. A total of 31 knees in 27 patients with recurrent dislocation of the patella who underwent a modified ET procedure (without medial capsular plication) were evaluated...
October 3, 2016: Journal of Knee Surgery
https://www.readbyqxmd.com/read/27693442/hip-abductor-strength-and-lower-extremity-running-related-injury-in-distance-runners-a-systematic-review
#11
REVIEW
Matthew D Mucha, Wade Caldwell, Emily L Schlueter, Carly Walters, Amy Hassen
OBJECTIVES: Determine the association between hip abduction strength and lower extremity running related injury in distance runners. DESIGN: Systematic review. METHODS: Prospective longitudinal and cross sectional studies that quantified hip abduction strength and provided diagnosis of running related injury in distance runners were included and assessed for quality. Effect size was calculated for between group differences in hip abduction strength...
September 20, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27574606/lateral-patellofemoral-ligament-reconstruction-to-restore-functional-capacity-in-patients-previously-undergoing-lateral-retinacular-release
#12
Mitch Beckert, Dylan Crebs, Michael Nieto, Yubo Gao, John Albright
AIM: To study patient outcomes after surgical correction for iatrogenic patellar instability. METHODS: This retrospective study looked at 17 patients (19 knees) suffering from disabling medial patellar instability following lateral release surgery. All patients underwent lateral patellofemoral ligament (LPFL) reconstruction by a single surgeon. Assessments in all 19 cases included functional outcome scores, range of motion, and assessment for the presence of apprehension sign of the patella to determine if LPFL reconstruction surgery was successful at restoring patellofemoral stability...
August 16, 2016: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/27565481/an-evaluation-of-the-effectiveness-of-medial-patellofemoral-ligament-reconstruction-using-an-anatomical-tunnel-site
#13
Kars P Valkering, Aysha Rajeev, Nick Caplan, Wim E Tuinebreijer, Deiary F Kader
PURPOSE: Medial patellofemoral ligament (MPFL) reconstruction for recurrent patellar instability has gained popularity, and anatomical and biomechanical studies have recently altered our operative techniques. The aim of this study was to report the clinical outcome of this new anatomical MPFL reconstructive technique and investigate whether correlating factors could be identified. METHODS: Between 2009 and 2012, a total of 31 consecutive patients underwent MPFL reconstruction using an autologous gracilis graft and anatomical tunnel placement...
August 26, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27544273/patellar-tracking-after-isolated-medial-patellofemoral-ligament-reconstruction-dynamic-evaluation-using-computed-tomography
#14
Riccardo G Gobbi, Marco K Demange, Luiz Francisco Rodrigues de Ávila, José de Arimatéia Batista Araújo Filho, Ramon Alfredo Moreno, Marco Antônio Gutierrez, Marina de Sá Rebelo, Luis Eduardo Passarelli Tírico, José Ricardo Pécora, Gilberto Luis Camanho
PURPOSE: Medial patellofemoral ligament (MPFL) reconstruction offers good clinical results with a very low rate of instability recurrence. However, its in vivo effect on patellar tracking is not clearly known. The aim of this study is to investigate the effects of MPFL reconstruction on patellar tracking using dynamic 320-detector-row CT. METHODS: Ten patients with patellofemoral instability referred to isolated MPFL reconstruction surgery were selected and subjected to dynamic CT before and ≥6 months after surgery...
August 20, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/27523259/the-effect-of-tourniquets-on-patellofemoral-joint-congruity-during-total-knee-arthroplasty
#15
Yoshio Matsui, Kosuke Shintani, Yoshiaki Okajima, Masanori Matsuura, Shigeru Nakagawa
BACKGROUND: Incongruity of the patellofemoral joint after total knee arthroplasty (TKA) causes anterior knee pain. Intraoperative congruity tests are necessary to avoid unnecessary lateral retinacular release, and the usage of tourniquets may influence these results. The purpose of this study was to examine the effect of tourniquets on patellofemoral joint congruity during TKA. MATERIALS AND METHODS: Two hundreds and seventeen knees were examined after TKA. Skyline radiographs at 60° and 90° flexion were taken immediately after wound closure before and after tourniquet deflation to compare changes in patellar tilt angle...
September 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/27496910/comparison-of-lateral-closing-wedge-versus-medial-opening-wedge-high-tibial-osteotomy-on-knee-joint-alignment-and-kinematics-in-the-acl-deficient-knee
#16
Anil S Ranawat, Benedict U Nwachukwu, Andrew D Pearle, Hendrik A Zuiderbaan, Kenneth D Weeks, Saker Khamaisy
BACKGROUND: Lateral closing-wedge (LCW) and medial opening-wedge (MOW) high tibial osteotomies (HTOs) correct varus knee alignment and stabilize the anterior cruciate ligament (ACL)-deficient knee. Tibiofemoral and patellofemoral alignment and kinematics after HTO are not well quantified. PURPOSE: To compare the effect of LCW and MOW HTO on tibiofemoral and patellofemoral alignment in the ACL-deficient knee. STUDY DESIGN: Controlled laboratory study...
December 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27401402/management-of-combined-knee-medial-compartmental-and-patellofemoral-osteoarthritis-with-lateral-closing-wedge-osteotomy-with-anterior-translation-of-the-distal-tibial-fragment-does-the-degree-of-anteriorization-affect-the-functional-outcome-and-posterior-tibial
#17
Ahmed F Sadek, Mohammed K Osman, Mohamed A Laklok
BACKGROUND: The aim of this study was to assess the effect of degree of anterior translation of the distal tibial fragment after lateral closing wedge high tibial osteotomy in patients having combined knee medial compartmental and patellofemoral osteoarthritis. METHODS: A retrospective study was conducted on 64 patients who were operated on for combined knee medial compartmental and patellofemoral osteoarthritis, by lateral closing wedge high tibial osteotomy with anterior translation of the distal tibial fragment...
October 2016: Knee
https://www.readbyqxmd.com/read/27331033/medial-patello-femoral-ligament-mpfl-reconstruction-using-suture-anchors-fixation-preliminary-results
#18
Filippo Calanna, Luca Pulici, Giulia Carimati, Alessandro Quaglia, Piero Volpi
PURPOSE: several surgical techniques have been described for the MPFL reconstruction, using many femoral and patellar fixation techniques and different grafts (autograft, allograft, synthetic). The goal of our study is to evaluate the safety and efficacy of MPFL reconstruction using Juggerknot™ (BIOMET, Warsaw, Indiana) suture anchors fixation with a clinical evaluation pre/post surgery of our patients with objective patellofemoral (PF) instability. METHODS: from January 2013 to March 2015, 19 patients underwent isolated MPFL reconstruction using Juggerknot™ (BIOMET, Warsaw, Indiana) suture anchors fixation...
January 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/27317639/medial-patellofemoral-ligament-reconstruction-for-patellar-instability-following-total-knee-arthroplasty-a-review-of-6-cases
#19
A Lamotte, T Neri, A Kawaye, B Boyer, F Farizon, R Philippot
INTRODUCTION: Patellar instability is a frequent cause of total knee arthroplasty (TKA) failure. In cases of post-arthroplasty patellar instability, the medial structures may be damaged. The objective of this study was to study the effectiveness of medial patellofemoral ligament (MPFL) reconstruction. We hypothesized that MPFL reconstruction will effectively realign the patella, making it a viable treatment option for managing post-arthroplasty patellar instability. MATERIAL AND METHODS: In this retrospective study of six patients treated by four different surgeons, patients were included if they had a recurring or permanent patellar dislocation after undergoing TKA...
September 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27274482/reconstruction-of-the-medial-patellofemoral-ligament-by-means-of-the-anatomical-double-bundle-technique-using-metal-anchors
#20
David Sadigursky, Matheus Simões de Melo Laranjeira, Marzo Nunes, Rogério Jamil Fernandes Caneiro, Paulo Oliveira Colavolpe
OBJECTIVE: To evaluate double-bundle reconstruction of the medial patellofemoral ligament (MPFL) using a graft from the semitendinosus tendon and fixation with metal anchors over the medium term. METHODS: This was a prospective cross-sectional study. After approval from the research ethics committee, 31 patients with patellofemoral instability who underwent MPFL reconstruction by means of the anatomical double-bundle technique, with fixation using metal anchors, were analyzed between May 2010 and January 2015...
May 2016: Revista Brasileira de Ortopedia
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