Assessment of In Vitro Patellar Laxity in the Native Knee

2011 ◽  
Author(s):  
Mark C. Komosa ◽  
Sami S. Shalhoub ◽  
Adam J. Cyr ◽  
Lorin P. Maletsky
Keyword(s):  
Knee Pain ◽  
Anterior Knee Pain ◽  
Patellar Instability ◽  
Distal Femur ◽  
Joint Laxity ◽  
Active Stabilization ◽  
Anterior Knee ◽  
Knee Problem ◽  
Passive Stabilization

Patellar instability is a frequent knee problem and relates to anterior knee pain [1–3]. Patellofemoral (PF) joint laxity is a multifactor problem that depends on the active stabilization from the quadriceps muscles, the passive stabilization from the ligaments and retinacular tissue in the PF joint, and the static stabilization from the articular geometries of the distal femur and patella. The purpose of this study was to use a novel patellar laxity instrument to measure patellar laxity and to assess subject-to-subject variation in patellar laxity.

Evaluation of the Patient with Anterior Knee Pain and Patellar Instability

2011 ◽  
pp. 105-122 ◽  
Author(s):  
Vicente Sanchis-Alfonso ◽  
Erik Montesinos-Berry ◽  
Agustin Serrano ◽  
Vicente Martínez-Sanjuan
Keyword(s):  
Knee Pain ◽  
Anterior Knee Pain ◽  
Patellar Instability ◽  
Anterior Knee

scholarly journals Solitary synovial chondromatosis as a cause of Hoffa’s fat pad impingement

2015 ◽  
Vol 68 (1-2) ◽  
pp. 49-52 ◽  
Author(s):  
Mirsad Maljanovic ◽  
Vladimir Ristic ◽  
Predrag Rasovic ◽  
Radmila Matijevic ◽  
Vukadin Milankov
Keyword(s):  
Knee Pain ◽  
Anterior Knee Pain ◽  
Distal Femur ◽  
Histopathological Examination ◽  
Synovial Chondromatosis ◽  
Fat Pad ◽  
En Bloc ◽  
Superior Part ◽  
Shoulder Joints ◽  
Anterior Knee

Introduction. Synovial chondromatosis is a benign disease of synovial membrane usually affecting knee, elbow and shoulder joints. It rarely appears as a solitary formation and exceptionally within Hoffa?s fat pad. Case Report. We report a case of solitary synovial chondromatosis within Hoffa?s fat pad as a cause of its impingement in a female patient aged 63. At first, the patient had anterior knee pain with limited extension of the knee. Standard radiogram showed only mild patellofemoral osteoarthritic changes. Magnetic resonance of the knee showed ovoid solitary formation within Hoffa?s fat pad repressing its superior part between the kneecap and distal femur. Histopathological examination confirmed a case of extra-articular synovial chondromatosis. The tumorous mass was extracted surgically en bloc. Conclusion. Solitary synovial chondromatosis is an uncommon cause of Hoffa?s fat pad impingement and anterior knee pain in elderly female patients and can easily be misinterpreted as a different diagnosis.

Congenital internal rotation deformity of the distal femur presenting as patellofemoral instability and pain

2019 ◽  
Vol 4 (2) ◽  
pp. 93-97 ◽  
Author(s):  
Xinyuan Zhang ◽  
John Attenello ◽  
Marc R Safran ◽  
David W Lowenberg
Keyword(s):  
Internal Rotation ◽  
Knee Pain ◽  
Anterior Knee Pain ◽  
Distal Femur ◽  
Case Series ◽  
Patellofemoral Instability ◽  
Level Of Evidence ◽  
Femoral Antetorsion ◽  
Derotational Osteotomy ◽  
Anterior Knee

ObjectivesFemoral antetorsion, defined as the angle of rotation of the femoral head and neck axis in relation to the transcondylar axis of the distal femur, is a cause for patellofemoral instability and anterior knee pain. Most clinical reports do not distinguish between antetorsion of the femur distal to the isthmus and anteversion of the proximal femur, which is another cause of femoral internal rotational deformity.MethodsThis retrospective observational case series evaluated four cases in three female patients who underwent evaluation of surgical intervention for chronic anterior knee pain since childhood. Physical examination and radiographic images supported the diagnosis of internal rotation deformity at the distal femora in all four cases. Distal femoral derotational osteotomy of 45°, 60° and 30° were performed, respectively. Kujala scoring system for patellofemoral pathology was used to assess the change in knee symptoms before and after the osteotomies.ResultsThis study demonstrated successful treatment of the resultant knee symptoms from femoral antetorsion with distal femur derotational osteotomy in all three patients.ConclusionsPatellofemoral syndrome is multifactorial, and the true anatomic reason for each patient’s individual pathology must be determined before surgery proceeds.Level of evidenceLevel V.

scholarly journals Physical examination of the patellofemoral joint

2020 ◽  
Vol 68 (1) ◽  
Keyword(s):  
Physical Examination ◽  
Knee Pain ◽  
Anterior Knee Pain ◽  
Patellofemoral Joint ◽  
Patellar Instability ◽  
Adequate Treatment ◽  
Profound Knowledge ◽  
Anterior Knee ◽  
Patellofemoral Dislocation ◽  
Underlying Pathology

Patients with a patellofemoral pain are either in an acute state after a patellofemoral dislocation or are suffering from a chronic anterior knee pain (AKP), whereas AKP might be accompanied by patellar instability without dislocation. Whereas the acute state after a dislocation is mostly clear and its examination limited, the examination of a AKP is much more complex. A profound knowledge of the anatomy, the painful structures and patellofemoral biomechanics is essential in order to find the underlying pathology within the heterogeneous and diverse etiologies. Furthermore, a meticulous and precise examination is key to find the adequate treatment for AKP.

scholarly journals Reliability of clinical methods in evaluating patellofemoral pain syndrome with malalignment

2017 ◽  
Vol 3 (3) ◽  
pp. 334
Author(s):  
Arjun R. H. H. ◽  
Rama Kishan ◽  
Dhillon M. S. ◽  
Devender Chouhan
Keyword(s):  
Knee Pain ◽  
Anterior Knee Pain ◽  
Patellar Instability ◽  
Pain Syndrome ◽  
Patellofemoral Pain Syndrome ◽  
Patellofemoral Pain ◽  
Step Test ◽  
Clinical Test ◽  
Clinical Tests ◽  
Anterior Knee

<p class="abstract"><strong>Background:</strong> Diagnosis of patellofemroal pain syndrome has been challenging due to lack of clinical test with better sensitivity and specificity, axial imaging has been considered as the standard modality for evaluation. Patients with anterior knee pain because of patellofemoral pain syndrome can be sub-grouped as those with or without radiological positive parameter for patellar maltracking.  The aim of the present study was to evaluate reliability of clinical tests in two subgroups of patients presenting with patellofemoral pain syndrome<span lang="EN-IN">.</span></p><p class="abstract"><strong>Methods:</strong> 45 knees with anterior knee pain without any episode of patellar instability were evaluated clinically using four standard tests (patellar apprehension test (PAT), eccentric step test (EST), active instability test (AIT) and Waldron’s test. On the basis of CT scan finding (at least one positive radiological parameter of instability) 28 knees were categorized in Group A (potential patellar instability group) and 17 knees in Group B (PFPS).<strong></strong></p><p class="abstract"><strong>Results:</strong> All patients with 3 or more than three clinical test positive were cases with potential patellofemroal instability except two. Whereas other true patellofemroal pain patients all except 2 were have less than 3 positive clinical tests<span lang="EN-IN">. </span></p><p class="abstract"><strong>Conclusions:</strong> Clinical test have more diagnostic accuracy in evaluating anterior knee pain due to potential patellofemroal instability in comparison to patellofemroal pain without radiological instability<span lang="EN-IN">.</span></p>

Biomechanical Bases for Anterior Knee Pain and Patellar Instability in the Young Patient

2006 ◽  
pp. 55-76 ◽  
Author(s):  
Vicente Sanchis-Alfonso ◽  
Jaime M. Prat-Pastor ◽  
Carlos M. Atienza-Vicente ◽  
Carlos Puig-Abbs ◽  
Mario Comín-Clavijo
Keyword(s):  
Young Patient ◽  
Knee Pain ◽  
Anterior Knee Pain ◽  
Patellar Instability ◽  
Anterior Knee
Sign in / Sign up

Export Citation Format

Share Document