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Medial patellofemoral ligament

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https://www.readbyqxmd.com/read/28801826/brain-activity-changes-in-somatosensory-and-emotion-related-areas-with-medial-patellofemoral-ligament-deficiency
#1
Masaru Kadowaki, Taku Tadenuma, Nobuyuki Kumahashi, Yuji Uchio
BACKGROUND: Patellar instability with medial patellofemoral ligament (MPFL) deficiency is a common sports injury among young people. Although nonoperative and surgical treatment can provide stability of the patella, patients often have anxiety related to the knee. We speculate that neural dysfunction may be related to anxiety in these patients; however, the mechanism in the brain that generates this anxiety remains unknown. QUESTIONS/PURPOSES: (1) How does brain activity in patients with MPFL deficiency change in the areas related to somatic sensation against lateral shift of the patella? (2) How does patella instability, which can lead to continuous fear or apprehension for dislocation, influence brain activity in the areas related to emotion? METHODS: Nineteen patients with MPFL deficiency underwent surgical reconstruction in our hospital from April 2012 to March 2014...
August 11, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28768432/effects-of-surgical-factors-on-cartilage-can-be-detected-using-quantitative-magnetic-resonance-imaging-after-anterior-cruciate-ligament-reconstruction
#2
Keiko Amano, Alan K Li, Valentina Pedoia, Matthew F Koff, Aaron J Krych, Thomas M Link, Hollis Potter, Scott Rodeo, Xiaojuan Li, C Benjamin Ma, Sharmila Majumdar
BACKGROUND: Quantitative magnetic resonance (qMR) can be used to measure macromolecules in tissues and is a potential method of observing early cartilage changes in the development of posttraumatic osteoarthritis. Hypothesis/Purpose: We hypothesized that specific patient and surgical factors affecting cartilage matrix composition after anterior cruciate ligament (ACL) reconstruction (ACLR) can be detected using T1ρ and T2 relaxation times. Our purpose was to demonstrate this ability in a multicenter feasibility study...
April 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28741155/length-change-patterns-and-shape-of-a-grafted-tendon-after-anatomical-medial-patellofemoral-ligament-reconstruction-differs-from-that-in-a-healthy-knee
#3
Shuji Nakagawa, Yuji Arai, Hiroaki Inoue, Manabu Hino, Yuta Fujii, Shintaro Komaki, Kazuya Ikoma, Keiichiro Ueshima, Hiroyoshi Fujiwara, Toshikazu Kubo
PURPOSE: Recurrent patellar dislocation is currently treated with anatomical reconstruction of the medial patellofemoral ligament (MPFL), and favourable postoperative outcomes have been reported. However, it is uncertain if healthy MPFL function is restored by anatomical reconstruction. The hypothesis in this study was that stabilization of the patella following MPFL reconstruction would be improved compared with that before surgery, but that function of the grafted tendon would differ from that of a healthy MPFL...
July 24, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28730295/incarceration-of-the-medial-collateral-ligament-in-the-intercondylar-notch-following-proximal-avulsion
#4
Edward Walton, Martin Williams, James R Robinson
Intra-articular entrapment of the medial collateral ligament (MCL) is a rare but recognised complication of traumatic injury to the posteromedial corner (PMC) of the knee. Considering the MCL is the most commonly injured ligament of the knee this complication is extremely rare with only a handful of cases describing MCL entrapment following distal avulsion of the MCL. We present the first known case of MCL entrapment following proximal avulsion of the MCL and posterior oblique ligament (POL) with the mid-substance of the MCL becoming entrapped in the joint, lying on the superior surface of the medial meniscus and extending up into the intercondylar notch...
July 20, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28719945/management-of-injuries-to-the-medial-patellofemoral-ligament-a-review
#5
Jaydev B Mistry, Kevin F Bonner, Chukwuweike U Gwam, Melbin Thomas, Jennifer I Etcheson, Ronald E Delanois
No abstract text is available yet for this article.
July 18, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28706804/tibial-tuberosity-transfer-in-combination-with-medial-patellofemoral-ligament-reconstruction-surgical-technique
#6
Damian Clark, Katie Walmsley, Peter Schranz, Vipul Mandalia
The stability of the patellofemoral joint relies on the tenuous interplay of soft tissue and bony factors. Anatomic risk factors for instability include a shallow trochlea, an abnormally lateral tibial tubercle position, patella alta, hypermobility, or a secondary injury to the medial patellofemoral ligament (MPFL). There is an increasing interest in restoring normal anatomy to achieve stability, and at times more than 1 abnormality exists. This article describes the technique for combining a tibial tuberosity transfer and an MPFL reconstruction...
June 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/28702749/evaluation-of-different-surgical-methods-in-treating-recurrent-patella-dislocation-after-three-dimensional-reconstruction
#7
Hao Du, Xiao-Xiao Tian, Fa-Qi Guo, Xiang-Ming Li, Tao-Tao Ji, Bin Li, Tong-Sen Li
PURPOSE: Recurrent patella dislocation (RPD) is the most common complication of patellar instability. The effects of different surgical techniques on the outcome of RPD treatments remain unclear. This study was conducted to compare the effects of three surgical techniques in treating RPD by three-dimensional (3D) reconstruction from computed tomography (CT) scans. METHODS: Sixty-eight patients with RPD and no previous surgical treatments who attended our hospital between October 2010 and 2013 were enrolled and randomly assigned into three groups: (1) medial patellofemoral ligament (MPFL) reconstruction and medial patellar retinaculum (MPR) plication group; (2) lateral patellar retinaculum (LPR) release and MPR plication group; and (3) MPFL reconstruction and LPR release group...
July 12, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28696495/robotic-arm-assisted-total-knee-arthroplasty-demonstrated-soft-tissue-protection
#8
Anton Khlopas, Morad Chughtai, Emily L Hampp, Laura Y Scholl, Michael Prieto, Ta-Cheng Chang, Abdullah Abbasi, Manoshi Bhowmik-Stoker, Jason Otto, David J Jacofsky, Michael A Mont
INTRODUCTION: While total knee arthroplasty (TKA) procedures have demonstrated clinical success, occasionally intraoperative complications can occur. Collateral or posterior cruciate ligament injury, instability, extensor mechanism disruption, and tibiofemoral or patellofemoral dislocation are among a few of the intraoperatively driven adverse events prevalently ranked by The Knee Society. Robotic-arm assisted TKA (RATKA) provides a surgeon the ability to three-dimensionally plan a TKA and use intraoperative visual, auditory, and tactile feedback to ensure that only the desired bone cuts are made...
July 11, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/28684171/biomechanical-tensile-strength-analysis-for-medial-patellofemoral-ligament-reconstruction
#9
Patrick W Joyner, Jeremy Bruce, Travis S Roth, Frederic Baker Mills, Scott Winnier, Ryan Hess, Luke Wilcox, Aaron Mates, Tim Frerichs, James R Andrews, Charles A Roth
BACKGROUND: Medial patellofemoral ligament (MPFL) reconstruction is a surgery for acute and chronic dislocating patella. Several surgical techniques have been described. No biomechanical study has compared suture anchors, interference screws, and suspensory cortical fixation for MPFL reconstruction using human gracilis allograft. METHODS: Twelve human cadaver knees were used for the analysis of five MPFL reconstruction techniques on the femur (F) and patella (P): suspensory cortical (SC), interference screw (IS) and suture anchor (SA) fixation (SC-F/SC-P, SC-F/IS-P, SC-F/SA-P, IS-F/SC-P, IS-F/IS-P)...
July 3, 2017: Knee
https://www.readbyqxmd.com/read/28680899/cyclic-testing-of-3-medial-patellofemoral-ligament-reconstruction-techniques
#10
Vishal Mehta, Cassie Mandala, Ahmed Akhter
BACKGROUND: Several techniques are available to secure the graft to the patella during medial patellofemoral ligament (MPFL) reconstruction. The biomechanical properties of these techniques remain unknown. PURPOSE: To compare the biomechanical properties of 3 MPFL patellar fixation techniques: bone tunnels (BT), PushLock anchors (PL), and tenodesis screws (TS). STUDY DESIGN: Controlled laboratory study. METHODS: Forty-five MPFL reconstructions were performed using 3 different reconstruction techniques (BT, PL, and TS)...
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28678520/return-to-play-guidelines-after-medial-patellofemoral-ligament-surgery-for-recurrent-patellar-instability-a-systematic-review
#11
Saif Zaman, Alex White, Weilong J Shi, Kevin B Freedman, Christopher C Dodson
BACKGROUND: Medial patellofemoral ligament (MPFL) reconstruction and repair continue to gain acceptance as viable treatment options for recurrent patellar instability in patients who wish to return to sports after surgery. Return-to-play guidelines with objective or subjective criteria for athletes after MPFL surgery, however, have not been uniformly defined. PURPOSE: To determine whether a concise and objective protocol exists that may help athletes return to their sport more safely after MPFL surgery...
June 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28666039/ultrasound-guided-percutaneous-repair-of-medial-patellofemoral-ligament-surgical-technique-and-outcomes
#12
Alan M Hirahara, Wyatt J Andersen
A lateral patellar dislocation causes a medial patellofemoral ligament (MPFL) tear that begins affecting patellar biomechanics. Reconstruction is difficult because of the inability to reliably and accurately determine proper placement of sockets. Studies of MPFL anatomy have found significant variability in attachment site locations, which suggests MPFL procedures cannot be used universally and must be approached differently for each patient. Recurrent dislocations result in patellar and trochlear chondral and bony damage...
May 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28662894/medial-patellofemoral-ligament-medial-patellotibial-ligament-and-medial-patellomeniscal-ligament-anatomic-histologic-radiographic-and-biomechanical-study
#13
Betina B Hinckel, Riccardo G Gobbi, Marco K Demange, Cesar Augusto M Pereira, Jose Ricardo Pécora, Renato Jose M Natalino, Luciana Miyahira, Bruno S Kubota, Gilberto Luis Camanho
PURPOSE: To describe the anatomy (quantitative macroscopic and histologic), radiographic parameters of the insertions, and biomechanical characteristics of the medial ligamentous restrictors of the patella (medial patellofemoral ligament [MPFL], medial patellotibial ligament [MPTL], and medial patellomeniscal ligament [MPML]) in cadaveric knees. Because the MPTL and the MPML are not as well known as the MPFL, they were the focus of this study. METHODS: MPFLs, MPTLs, and MPMLs from 9 knees were dissected...
June 26, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28642979/-medial-opening-wedge-high-tibial-osteotomy
#14
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...
August 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
#15
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...
August 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
#16
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
#17
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
#18
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
#19
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
#20
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
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