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Patellofemoral joint

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https://www.readbyqxmd.com/read/29664877/juvenile-osteochondritis-dissecans-of-the-trochlea-a-cohort-study-of-34-trochlear-lesions-associated-with-sporting-activities-that-load-the-patellofemoral-joint
#1
Meghan J Price, Maria Tuca, Joseph Nguyen, Jason Silberman, Eva Luderowski, Tyler J Uppstrom, Daniel W Green
BACKGROUND: Juvenile osteochondritis dissecans (JOCD) lesions are rarely located in the trochlea and few studies have focused on the causes and outcomes of JOCD lesions in this part of the knee. The purpose of this study is to (1) evaluate the clinical characteristics and outcomes of patients who undergo surgery for JOCD in this unusual location as well as (2) assess the association between trochlear JOCD and participation in sporting activities that load the patellofemoral joint. METHODS: We conducted a retrospective cohort study of 34 trochlear JOCD lesions in 30 patients...
April 16, 2018: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/29662782/quantitative-analysis-of-t2-relaxation-times-of-the-patellofemoral-joint-cartilage-3-years-after-anterior-cruciate-ligament-reconstruction
#2
Chang-Wan Kim, Ali Hosseini, Lin Lin, Yang Wang, Martin Torriani, Thomas Gill, Alan J Grodzinsky, Guoan Li
Objective: To evaluate patient-specific patellofemoral joint (PFJ) cartilage 3 years postoperatively using T2 mapping magnetic resonance imaging and the uninjured contralateral side as control. Hypothesis: The cartilage of the PFJ in the anterior cruciate ligament (ACL) reconstructed knees would show increased T2 values compared to the uninjured contralateral knees at 3-year follow-up, and the femoral (trochlear) cartilage would be more susceptible than the patella in degeneration in ACL-reconstructed knees...
January 2018: Journal of Orthopaedic Translation
https://www.readbyqxmd.com/read/29655902/association-between-increase-in-vertical-ground-reaction-force-loading-rate-and-pain-level-in-women-with-patellofemoral-pain-after-a-patellofemoral-joint-loading-protocol
#3
Ronaldo Valdir Briani, Marcella Ferraz Pazzinatto, Marina Cabral Waiteman, Danilo de Oliveira Silva, Fábio Mícolis de Azevedo
BACKGROUND: The etiology of patellofemoral pain (PFP) is thought to be the result of increased patellofemoral joint (PFJ) load and aberrant lower extremity mechanics, including altered vertical ground reaction forces (VGRF). However, few studies have investigated the association between an increase in pain and VGRF loading rates in the context of PFP. Thus, this study aimed to investigate the immediate effects of PFJ loading on pain and VGRF loading rate, and to see if there is a link between modification of both pain and VGRF loading rate during stair negotiation...
April 11, 2018: Knee
https://www.readbyqxmd.com/read/29651769/superolateral-hoffa-s-fat-pad-shfp-oedema-and-patellar-cartilage-volume-loss-quantitative-analysis-using-longitudinal-data-from-the-foundation-for-the-national-institute-of-health-fnih-osteoarthritis-biomarkers-consortium
#4
Arya Haj-Mirzaian, Ali Guermazi, Nima Hafezi-Nejad, Christopher Sereni, Michael Hakky, David J Hunter, Bashir Zikria, Frank W Roemer, Shadpour Demehri
OBJECTIVES: To determine the association of superolateral Hoffa's fat pad (SHFP) oedema and patellofemoral joint structural damage in participants of Foundation for the National Institute of Health Osteoarthritis Biomarkers Consortium study. METHODS: Baseline and 24-month MRIs of 600 subjects were assessed. The presence of SHFP oedema (using 0-3 grading scale) and patellar morphology metrics were determined using baseline MRI. Quantitative patellar cartilage volume and semi-quantitative MRI osteoarthritis knee score (MOAKS) variables were extracted...
April 12, 2018: European Radiology
https://www.readbyqxmd.com/read/29628679/patellofemoral-arthroplasty-current-concepts
#5
REVIEW
Rory Cuthbert, Saket Tibrewal, Sheo B Tibrewal
Isolated patellofemoral arthritis (IPA) is a debilitating condition characterised by a loss of articular cartilage on the patella facets, the trochlear groove or both. By definition, patients with IPA must have normal cartilage in the tibiofemoral compartments of their knee. It is therefore logical to pursue arthroplasty which corrects the abnormality while sparing healthy bone and preserving the knee's native kinematics, which is the premise underpinning patellofemoral arthroplasty (PFA). However, its use remains controversial, with many surgeons still favouring total knee replacement (TKR) in these patients...
January 2018: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/29625412/which-is-the-best-predictor-of-excessive-hip-internal-rotation-in-women-with-patellofemoral-pain-rearfoot-eversion-or-hip-muscle-strength-exploring-subgroups
#6
Amanda Schenatto Ferreira, Danilo de Oliveira Silva, Ronaldo Valdir Briani, Deisi Ferrari, Fernando Amâncio Aragão, Marcella Ferraz Pazzinatto, Fábio Mícolis de Azevedo
BACKGROUND: Patellofemoral pain (PFP) has been linked to increased patellofemoral joint stress as a result of excessive hip internal rotation. Lower hip strength and/or excessive rearfoot eversion have been used to explain such altered movement pattern; however, it is unknown which one is the best predictor of excessive hip internal rotation. RESEARCH QUESTION: To investigate if peak rearfoot eversion and/or peak concentric hip abductor strength can predict peak hip internal rotation during stair ascent in women with PFP...
March 26, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29623377/the-increase-in-posterior-tibial-slope-provides-a-positive-biomechanical-effect-in-posterior-stabilized-total-knee-arthroplasty
#7
Kyoung-Tak Kang, Sae Kwang Kwon, Juhyun Son, Oh-Ryong Kwon, Jun-Sang Lee, Yong-Gon Koh
PURPOSE: This study aims to clarify the influence of the posterior tibial slope (PTS) on knee joint biomechanics after posterior-stabilized (PS) total knee arthroplasty (TKA) using a computer simulation. METHODS: A validated TKA computational model was used to evaluate and quantify the effects of an increased PTS. In order to conduct a squat simulation, models with a - 3° to 15° PTS using increments of 3° were developed. Forces on the quadriceps and collateral ligament, a tibial posterior translation, contact point on a polyethylene (PE) insert, and contact stress on the patellofemoral (PF) joint and post in a PE insert were compared...
April 5, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29622243/editorial-commentary-standing-the-test-of-time-and-sport-fulkerson-tibial-tubercle-osteotomy-of-the-knee
#8
EDITORIAL
Nicola Maffulli
A biplanar osteotomy aiming to anteromedialize the anterior tibial tuberosity to realign the patellofemoral joint described by Prof. Fulkerson is one of the classical operations to address many pathologies of the patellofemoral joint. The procedure is evidence-based and effective for the management of patellofemoral pain and osteoarthritis, confirming that the original ideas and concepts are still valid, and still stand strong. In high-demand patients, the Fulkerson osteotomy offers good opportunities of success in terms of return to sport...
April 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29614710/patient-reported-outcome-measures-proms-in-patients-undergoing-patellofemoral-arthroplasty-and-total-knee-replacement-a-comparative-study
#9
Fabio Luigi Perrone, Steffen Baron, Eduardo M Suero, Christian Lausmann, Daniel Kendoff, Akos Zahar, Thorsten Gehrke, Mustafa Citak
BACKGROUND: Incongruity in the evaluation of outcomes between patients and surgeons has led to an increasing utilization of patient-reported outcome measures (PROMs) as an evaluation method of outcome. OBJECTIVE: The aim of this study was to compare Oxford Knee Score (OKS), KOOS-PS and Kujala Score results in patients who received either PFA or TKA with and without patella resurfacing in the tretament of knee osteoarthritis. METHODS: A total of 50 patients (PFA = 19 patients; TKA with patelloplasty = 15 patients; TKA with patellar resurfacing = 16 patients) undergone surgery between 2011 and 2014 and were included for final analysis...
March 23, 2018: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29605862/correction-to-does-increased-femoral-antetorsion-predispose-to-cartilage-lesions-of-the-patellofemoral-joint
#10
Johannes Oppermann, Jan Bredow, Boris Wissussek, Christian Karl Spies, Christoph Kolja Boese, Shi-Min Chang, Peer Eysel, Jens Dargel
Unfortunately, the following reference was not included in the original publication of the article.
March 31, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29604539/corrigendum-to-changes-in-patellofemoral-pain-resulting-from-repetitive-impact-landings-are-associated-with-the-magnitude-and-rate-of-patellofemoral-joint-loading-clin-biomech-53-2018-31-36
#11
Lee T Atkins, C Roger James, Hyung Suk Yang, Phillip S Sizer, Jean-Michel Brismée, Steven F Sawyer, Christopher M Powers
No abstract text is available yet for this article.
March 28, 2018: Clinical Biomechanics
https://www.readbyqxmd.com/read/29601214/a-novel-clinical-test-for-assessing-patellar-cartilage-changes-and-its-correlation-with-magnetic-resonance-imaging-and-arthroscopy
#12
Paul Khoo, Abhijeet Ghoshal, Damien Byrne, Ramesh Subramaniam, Raymond Moran
Controversy still exists regarding the best clinical assessment test for chondromalacia patellae (CMP). Our study aims to evaluate the specificity and sensitivity of a novel clinical test for CMP, the "Patella Slide Test" (PST) against the findings of magnetic resonance imaging (MRI) and arthroscopy. We included 221 consecutive patients planned for elective knee arthroscopic surgery. An MRI scan of the symptomatic knee was performed prior to surgery. On the day of surgery, each patient was examined using the PST followed by a knee arthroscopy to assess the quality of the chondral surfaces of the patellofemoral joint...
March 30, 2018: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/29579721/the-influence-of-isolated-femur-and-tibia-rotations-on-patella-cartilage-stress-a-sensitivity-analysis
#13
Tzu-Chieh Liao, Li Yin, Christopher M Powers
BACKGROUND: To determine the influence of femur and tibia rotations in the transverse and frontal planes on patella cartilage stress. METHODS: Patella cartilage stress profiles of six healthy females were obtained during a squatting task using subject-specific finite element models of the patellofemoral joint (45° of knee flexion). Input parameters for the finite element model included joint geometry, quadriceps muscle forces, and weight-bearing patellofemoral joint kinematics...
March 12, 2018: Clinical Biomechanics
https://www.readbyqxmd.com/read/29576314/position-of-the-quadriceps-actuator-influences-knee-loads-during-simulated-squat-testing
#14
Michael W Hast, Stephen J Piazza
The "Oxford Rig" cadaveric simulator permits researchers and clinicians to study knee mechanics during a simulated squatting motion. The motion of the lower limb in the Oxford Rig is typically controlled by a single actuator that applies tension to the quadriceps tendon. The location of the quadriceps actuator, however, has differed across published descriptions of the Oxford Rig. Actuators have been placed on the femur and pelvis, and on "grounded" locations external to the specimen, but the consequences of this placement for knee kinematics and kinetics are unknown...
March 17, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29564040/noise-around-the-knee
#15
REVIEW
Sang Jun Song, Cheol Hee Park, Hu Liang, Sang Jun Kim
Noise in the knee joint is a common symptom that often leads to outpatient clinic visits. However, there have been no previous review articles regarding noise around the knee despite its high prevalence. We will review the noise characteristics according to sound nature and onset as well as factors for differentiation between physiological and pathological noises. In addition, we will describe causes of the physiological and pathological noises and management of noise in the knee. An appropriate review of the characteristics of noise, its pathophysiology, and factors for differentiation between physiological and pathological noises can facilitate patient guidance...
March 2018: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/29551276/femoral-component-rotation-in-patellofemoral-joint-replacement
#16
Hans-Peter W van Jonbergen, Robin E Westerbeek
BACKGROUND: Clinical outcomes in patellofemoral joint replacement may be related to femoral component rotation. Assessment of rotational alignment is however difficult as patients with isolated patellofemoral osteoarthritis often have trochlear dysplasia. The use of the medial malleolus as a landmark to guide rotation has been suggested. The purpose of our study was to evaluate this technique with regard to femoral component rotation, and to correlate rotation with clinical outcomes at one-year follow-up...
March 15, 2018: Knee
https://www.readbyqxmd.com/read/29547032/characteristics-of-plantar-pressures-and-related-pain-profiles-in-elite-sprinters-and-recreational-runners
#17
Tong-Hsien Chow, Yih-Shyuan Chen, Jia-Chang Wang
BACKGROUND: Plantar pressure measurement is effective for assessing plantar loading and can be applied to evaluating foot performance. We sought to explore the characteristics of plantar pressures in elite sprinters and recreational runners during static standing and walking. METHODS: Arch index (AI) values, regional plantar pressure distributions (PPDs), and footprint characteristics were examined in 80 elite sprinters and 90 recreational runners using an optical plantar pressure measurement system...
January 2018: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/29540410/clinical-effectiveness-of-patella-mobilisation-therapy-versus-a-waiting-list-control-for-knee-osteoarthritis-a-protocol-for-a-pragmatic-randomised-clinical-trial
#18
Regina Wing Shan Sit, Keith Kwok Wai Chan, Benjamin Hon Kei Yip, Daisy Dexing Zhang, Kenneth Dean Reeves, Ying Ho Chan, Vincent Chi Ho Chung, Samuel Yeung Shan Wong
INTRODUCTION: Knee osteoarthritis (KOA) is a common, disabling and costly medical condition. The patellofemoral joint is a critical source of pain in individuals with KOA, and coexistence of patellofemoral osteoarthritis (PFOA) and tibiofemoral osteoarthritis (TFOA) is sometimes observed. The identification of subgroups with PFOA and customised interventions to correct underlying pathomechanics is beneficial for individuals with KOA. This study aims to evaluate whether a clinic-based patella mobilisation therapy (PMT) leads to significant improvement in pain, physical function and quality of life of individuals with KOA...
March 14, 2018: BMJ Open
https://www.readbyqxmd.com/read/29514364/patellofemoral-imbalance-in-a-balanced-total-knee-arthroplasty-how-does-it-occur
#19
Perry Jaymes Evangelista, Nathan Lenz, Scott Laster, Neil P Sheth, Ran Schwarzkopf
Despite the overall successful outcomes following primary total knee arthroplasty (TKA) and the concept that a well-balanced TKA yields a more successful result, concerns still remain in the reported literature regarding the patellofemoral joint. Diminished outcomes have been associated with poorly balanced or placed patella implants. The effect of different techniques to achieve flexion-extension balance and the use of posterior stabilized (PS) versus cruciate retaining (CR) implant designs on patellofemoral balancing has not been previously studied...
March 7, 2018: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29488245/in-vivo-patellar-tracking-in-individuals-with-patellofemoral-pain-and-healthy-individuals
#20
Fateme Esfandiarpour, Constance M Lebrun, Sukhvinder Dhillon, Pierre Boulanger
Understanding of the exact cause of patellofemoral pain has been limited by methodological challenges to evaluate in-vivo joint motion. This study compared six degree-of-freedom patellar motion during a dynamic lunge task between individuals with patellofemoral pain and healthy individuals. Knee joints of eight females with patellofemoral pain and ten healthy females were imaged using a CT scanner in supine lying position, then by a dual-orthogonal fluoroscope while they performed a lunge. To quantify patellar motion, the three-dimensional models of the knee bones, reconstructed from CT scans, were registered on the fluoroscopy images using the Fluomotion registration software...
February 28, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
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