scholarly journals DTI-based muscle fiber tracking of the quadriceps mechanism in lateral patellar dislocation

2009 ◽  
Vol 29 (3) ◽  
pp. 663-670 ◽  
Author(s):  
J. Herman Kan ◽  
Anneriet M. Heemskerk ◽  
Zhaohua Ding ◽  
Andrew Gregory ◽  
Gregory Mencio ◽  
...  
Keyword(s):  
Muscle Fiber ◽  
Patellar Dislocation ◽  
Fiber Tracking ◽  
Lateral Patellar Dislocation

The management of lateral patellar dislocation: state of the art

2017 ◽  
Vol 2 (4) ◽  
pp. 205-212 ◽  
Author(s):  
Elizabeth A Arendt ◽  
Simon T Donell ◽  
Petri J Sillanpää ◽  
Julian A Feller
Keyword(s):  
Patellar Dislocation ◽  
State Of The Art ◽  
Lateral Patellar Dislocation

scholarly journals Quantitative diffusion tensor MRI-based fiber tracking of human skeletal muscle

2007 ◽  
Vol 103 (2) ◽  
pp. 673-681 ◽  
Author(s):  
Drew A. Lansdown ◽  
Zhaohua Ding ◽  
Megan Wadington ◽  
Jennifer L. Hornberger ◽  
Bruce M. Damon
Keyword(s):  
Muscle Fiber ◽  
Diffusion Tensor ◽  
Fiber Tracking ◽  
Laboratory Frame ◽  
Mean Value ◽  
Pennation Angle ◽  
Frame Of Reference ◽  
Fiber Tracts ◽  
Angle Measurements ◽  
The Mean

Diffusion-tensor magnetic resonance imaging (DT-MRI) offers great potential for understanding structure-function relationships in human skeletal muscles. The purposes of this study were to demonstrate the feasibility of using in vivo human DT-MRI fiber tracking data for making pennation angle measurements and to test the hypothesis that heterogeneity in the orientation of the tibialis anterior (TA) muscle's aponeurosis would lead to heterogeneity in pennation angle. Eight healthy subjects (5 male) were studied. T1-weighted anatomical MRI and DT-MRI data were acquired of the TA muscle. Fibers were tracked from the TA's aponeurosis by following the principal eigenvector. The orientations of the aponeurosis and muscle fiber tracts in the laboratory frame of reference and the orientation of the fiber tracts with respect to the aponeurosis [i.e., the pennation angle (θ)] were determined. The muscle fiber orientations, when expressed relative to the laboratory frame of reference, did not change as functions of superior-to-inferior position. The sagittal and coronal orientations of the aponeurosis did not change in practically significant manners either, but the aponeurosis′ axial orientation changed by ∼40°. As a result, the mean value for θ decreased from 16.3 (SD 6.9) to 11.4° (SD 5.0) along the muscle's superior-to-inferior direction. The mean value of θ was greater in the deep than in the superficial compartment. We conclude that pennation angle measurements of human muscle made using DT-MRI muscle fiber tracking are feasible and reveal that in the foot-head direction, there is heterogeneity in the pennation properties of the human TA muscle.

Patellofemoral Arthritis After Lateral Patellar Dislocation: A Matched Population-Based Analysis

2016 ◽  
Vol 45 (5) ◽  
pp. 1012-1017 ◽  
Author(s):  
Thomas L. Sanders ◽  
Ayoosh Pareek ◽  
Nicholas R. Johnson ◽  
Michael J. Stuart ◽  
Diane L. Dahm ◽  
...  
Keyword(s):  
Knee Arthroplasty ◽  
Cumulative Incidence ◽  
Patellar Dislocation ◽  
Trochlear Dysplasia ◽  
Significant Risk ◽  
Significant Risk Factor ◽  
Patellofemoral Arthritis ◽  
Level Of Evidence ◽  
Lateral Patellar Dislocation ◽  
Osteochondral Injury

Background: The rate of patellofemoral arthritis after lateral patellar dislocation is unknown. Purpose/Hypothesis: The purpose of this study was to compare the risk of patellofemoral arthritis and knee arthroplasty between patients who experienced a lateral patellar dislocation and matched individuals without a patellar dislocation. Additionally, factors predictive of arthritis after patellar dislocation were examined. The hypothesis was that the rate of arthritis is likely higher among patients who experience a patellar dislocation compared with those who do not. Study Design: Cohort study; Level of evidence, 3. Methods: In this study, 609 patients who had a first-time lateral patellar dislocation between 1990 and 2010 were compared with an age- and sex-matched cohort of patients who did not have a patellar dislocation. Medical records were reviewed to collect information related to the initial injury, recurrent dislocation, treatment, and progression to clinically significant patellofemoral arthritis (defined as symptoms with degenerative changes on patellar sunrise radiographs). Factors associated with arthritis (age, sex, recurrence, osteochondral injury, trochlear dysplasia) were examined. Results: At a mean follow-up of 12.3 ± 6.5 years from initial dislocation, 58 patients (9.5%) in the dislocation cohort were diagnosed with patellofemoral arthritis, corresponding to a cumulative incidence of arthritis of 1.2% at 5 years, 2.7% at 10 years, 8.1% at 15 years, 14.8% at 20 years, and 48.9% at 25 years. In the control cohort, 8 patients (1.3%) were diagnosed with arthritis, corresponding to a cumulative incidence of arthritis of 0% at 5 years, 0% at 10 years, 1.3% at 15 years, 2.9% at 20 years, and 8.3% at 25 years. Therefore, patients who experienced a lateral patellar dislocation had a significantly higher risk of developing arthritis (hazard ratio [HR], 7.8; 95% CI, 3.9-17.6; P < .001) than individuals without a patellar dislocation. However, the risk of knee arthroplasty was similar between groups (HR, 2.8; 95% CI, 0.6-19.7; P = .2). Recurrent patellar dislocations (HR, 4.5; 95% CI, 1.6-12.6), osteochondral injury (HR, 11.3; 95% CI, 5.0-26.6), and trochlear dysplasia (HR, 3.6; 95% CI, 1.3-10.0) were associated with arthritis after patellar dislocation. Conclusion: Patellar dislocation is a significant risk factor for patellofemoral arthritis, as nearly half of patients have symptoms and radiographic changes consistent with arthritis at 25 years after lateral patellar dislocation. Osteochondral injury, recurrent patellar instability, and trochlear dysplasia are associated with the development of arthritis.

Development of a Multivariable Model Based on Individual Risk Factors for Recurrent Lateral Patellar Dislocation

2021 ◽  
Vol 103 (7) ◽  
pp. 586-592
Author(s):  
Daphne I. Ling ◽  
Jacqueline M. Brady ◽  
Elizabeth Arendt ◽  
Marc Tompkins ◽  
Julie Agel ◽  
...  
Keyword(s):  
Risk Factors ◽  
Patellar Dislocation ◽  
Individual Risk ◽  
Multivariable Model ◽  
Model Based ◽  
Lateral Patellar Dislocation ◽  
Individual Risk Factors

Prior lateral patellar dislocation: MR imaging findings.

Radiology ◽  
1993 ◽  
Vol 189 (3) ◽  
pp. 905-907 ◽  
Author(s):  
E Lance ◽  
A L Deutsch ◽  
J H Mink
Keyword(s):  
Mr Imaging ◽  
Patellar Dislocation ◽  
Imaging Findings ◽  
Lateral Patellar Dislocation

scholarly journals Descending genicular artery injury following transient lateral patellar dislocation

2018 ◽  
Vol 9 ◽  
pp. S39-S43 ◽  
Author(s):  
Andrea Silvestri ◽  
Dario Regis ◽  
Giacomo Trivellin ◽  
Marco Piccoli ◽  
Mauro Spina ◽  
...  
Keyword(s):  
Patellar Dislocation ◽  
Artery Injury ◽  
Lateral Patellar Dislocation ◽  
Genicular Artery

scholarly journals Extensive Lateral Release and Medial Patellofemoral Ligament Reconstruction in 25 Years of Chronic Fixed Lateral Patellar Dislocation: A 5-Year Follow-Up Case Report

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Andri M. T. Lubis ◽  
Petrus Aprianto ◽  
Yudistira P. Siregar
Keyword(s):  
Patellar Dislocation ◽  
Ligament Reconstruction ◽  
Medial Patellofemoral Ligament ◽  
Daily Activities ◽  
Lateral Release ◽  
Medial Patellofemoral Ligament Reconstruction ◽  
Lateral Dislocation ◽  
Lateral Patellar Dislocation ◽  
The Right

Lateral dislocation of the patella is not uncommon and may impede daily activities as this causes compressive dysfunction and instabilities. Most cases of patellar lateral dislocation are due to damage to the medial patellofemoral ligament (MPFL), either rupture of detachment of the patella or femoral attachment. MPFL reconstruction alone was considered adequate for the treatment of this condition. We present a case of a 49-year-old male with chronic posttraumatic lateral patellar dislocation of the right knee of 25 years, which we treated with extensive lateral release and right medial patellofemoral ligament reconstruction with 5-year follow-up data.

scholarly journals Medial patellofemoral ligament anatomy: is it a predisposing factor for lateral patellar dislocation?

2014 ◽  
Vol 38 (8) ◽  
pp. 1633-1639 ◽  
Author(s):  
Victor de Oliveira ◽  
Vanessa de Souza ◽  
Ricardo Cury ◽  
Osmar Pedro Camargo ◽  
Osmar Avanzi ◽  
...  
Keyword(s):  
Patellar Dislocation ◽  
Medial Patellofemoral Ligament ◽  
Predisposing Factor ◽  
Lateral Patellar Dislocation
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