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effect of medial patellofemoral

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https://www.readbyqxmd.com/read/27904790/current-concepts-in-the-treatment-of-gross-patellofemoral-instability
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
https://www.readbyqxmd.com/read/27217524/effect-of-trochlear-dysplasia-on-outcomes-after-isolated-soft-tissue-stabilization-for-patellar-instability
#15
Laurie A Hiemstra, Sarah Kerslake, Michael Loewen, Mark Lafave
BACKGROUND: Trochlear dysplasia is a well-described risk factor for patellofemoral instability. Despite its clear association with the incidence of patellar instability, it is unclear whether the presence of high-grade trochlear dysplasia influences clinical outcome after patellofemoral stabilization. PURPOSE: To determine whether isolated proximal soft tissue stabilization for patellofemoral instability is as successful in patients with high-grade dysplasia compared with low-grade or no dysplasia, as measured by disease-specific quality-of-life and pain scores...
June 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27149888/a-cadaveric-investigation-into-the-demographic-and-bony-alignment-properties-associated-with-osteoarthritis-of-the-patellofemoral-joint
#16
Douglas S Weinberg, Braden J Tucker, Joseph P Drain, David M Wang, Allison Gilmore, Raymond W Liu
BACKGROUND: Patellofemoral joint osteoarthritis is common, although circumstances dictating its evolution and pathogenesis remain unclear. Advances in surgical technique have improved the ability to modify long-bone alignment in the coronal, sagittal, and axial planes. However, to our knowledge, there is no significant long-term data available in regard to the relationship between anatomic alignment parameters most amenable to surgical modification and patellofemoral joint osteoarthritis...
June 2016: Knee
https://www.readbyqxmd.com/read/27146819/evaluating-the-potential-synergistic-benefit-of-a-realignment-brace-on-patients-receiving-exercise-therapy-for-patellofemoral-pain-syndrome-a-randomized-clinical-trial
#17
Wolf Petersen, Andree Ellermann, Ingo Volker Rembitzki, Sven Scheffler, Mirco Herbort, Gert Peter Brüggemann, Raymond Best, Thore Zantop, Christian Liebau
BACKGROUND: It has been previously shown that exercise programs for patellofemoral pain syndrome (PFPS) can be supported by medially directed taping. Evidence supporting the use of patellar braces is limited because previous studies have been low quality. The aim of this study is to compare the outcomes of patients with PFPS after treatment with a medially directed patellar realignment brace and supervised exercise. METHODS: In a prospective randomized multicenter trial, 156 patients with PFPS were included and randomly assigned to 6 weeks of supervised physiotherapy in combination with the patellar realignment brace, or supervised physiotherapy alone...
July 2016: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/27113220/female-adults-with-patellofemoral-pain-are-characterized-by-widespread-hyperalgesia-which-is-not-affected-immediately-by-patellofemoral-joint-loading
#18
Marcella Ferraz Pazzinatto, Danilo de Oliveira Silva, Christian Barton, Michael Skovdal Rathleff, Ronaldo Valdir Briani, Fábio Mícolis de Azevedo
OBJECTIVE: Compare pressure pain thresholds (PPTs) at the knee and a site remote to the knee in female adults with patellofemoral pain (PFP) to pain-free controls before and after a patellofemoral joint (PFJ) loading protocol designed to aggravate symptoms. DESIGN: Cross-sectional study SETTING: Participants were recruited via advertisements in fitness centers, public places for physical activity and universities. SUBJECTS: Thirty-eight females with patellofemoral pain, and 33 female pain-free controls...
October 2016: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/27062838/-treatment-of-recurrent-patellar-dislocation-associated-with-old-osteochondral-fracture
#19
Zhu Dai, Di You, Ying Liao, Zhiwei Chen, Jiabin Peng
OBJECTIVE: To explore the treatment methed of recurrent patellar dislocation associated with old osteochondral fracture and to evaluate its effectiveness. METHODS: Between August 2010 and August 2014, 12 cases of recurrent patellar dislocation with old osteochondral fracture were treated. There were 4 males and 8 females with an average age of 18.3 years (range, 15-24 years). The left knee was involved in 7 cases and the right knee in 5 cases. All the patients had a history of patellar dislocation, the average interval from injury to first hospitalization was 7...
January 2016: Chinese Journal of Reparative and Reconstructive Surgery
https://www.readbyqxmd.com/read/27052369/patella-tracking-and-patella-contact-pressure-in-modular-patellofemoral-arthroplasty-a-biomechanical-in-vitro-analysis
#20
Tilman Calliess, Max Ettinger, Ssuheib Schado, Christoph Becher, Christof Hurschler, Sven Ostermeier
INTRODUCTION: In the recent years modular partial knee prosthesis with the opportunity to combine unicompartmental tibiofemoral (UKA) and patellofemoral prosthesis (PFJ) were introduced to the clinics. To date, little is known about the biomechanics of these bi-cruciate retaining prosthetic designs. Aim of this study was to evaluate the influence of a PFJ in bicompartmental arthroplasty (UKA + PFJ) on patella tracking and retropatella pressure distribution. METHODS: A dynamic in vitro knee kinemator simulating an isokinetic extension cycle of the knee was used on eight knee specimen...
June 2016: Archives of Orthopaedic and Trauma Surgery
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