scholarly journals Popliteofibular ligament

2020 ◽  
Author(s):  
Joachim Feger
Keyword(s):  
Popliteofibular Ligament

The Magnetic Resonance Imaging Appearance of Individual Structures of the Posterolateral Knee

2000 ◽  
Vol 28 (2) ◽  
pp. 191-199 ◽  
Author(s):  
Robert F. LaPrade ◽  
Thomas J. Gilbert ◽  
Timothy S. Bollom ◽  
Fred Wentorf ◽  
Gregory Chaljub
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Biceps Femoris ◽  
Surgical Reconstruction ◽  
Iliotibial Band ◽  
Resonance Imaging ◽  
Popliteofibular Ligament ◽  
Imaging Appearance ◽  
Magnetic Resonance Imaging Appearance ◽  
Lateral Capsular Ligament

The purpose of this study was to contrast the magnetic resonance imaging appearance of uninjured components of the posterolateral knee with that of injured structures, and to assess the accuracy of magnetic resonance imaging in identifying posterolateral knee complex injuries. Thin-slice coronal oblique T1-weighted images through the entire fibular head were used to identify the posterolateral structures in seven uninjured knees. The appearance of corresponding grade III injuries to these structures was identified prospectively in 20 patients and verified at the time of surgical reconstruction. The sensitivity, specificity, and accuracy of imaging for the most frequently injured posterolateral knee structures in this series were as follows: iliotibial band-deep layer (91.7%, 100%, and 95%), short head of the biceps femoris-direct arm (81.3%, 100%, and 85%), short head of the biceps femoris-anterior arm (92.9%, 100%, and 95%), midthird lateral capsular ligament-meniscotibial (93.8%, 100%, and 95%), fibular collateral ligament (94.4%, 100%, and 95%), popliteus origin on femur (93.3%, 80%, and 90%), popliteofibular ligament (68.8%, 66.7%, and 68%), and the fabellofibular ligament (85.7%, 85.7%, and 85.7%). Magnetic resonance imaging of the knee was accurate in the identification of these injuries.

scholarly journals Internal and External Rotation Stabilizers of the Knee with Intact Cruciate and Collateral Ligaments

2017 ◽  
Vol 5 (3_suppl3) ◽  
pp. 2325967117S0012
Author(s):  
Alexander R. Vap ◽  
Jason M. Schon ◽  
Gilbert Moatshe ◽  
Raphael Cruz ◽  
Alex Brady ◽  
...  
Keyword(s):  
Internal Rotation ◽  
Knee Flexion ◽  
External Rotation ◽  
Iliotibial Band ◽  
Popliteus Tendon ◽  
Primary Role ◽  
Collateral Ligaments ◽  
Popliteofibular Ligament ◽  
Full Extension ◽  
Text Figure

Objectives: The purpose of this study was to assess the effect of sequentially cutting the posterolateral, anterolateral, posteromedial and anteromedial structures of the knee on rotational kinematics in the setting of intact cruciate and collateral ligaments. It was hypothesized that cutting of the iliotibial band (ITB), anterolateral ligament and lateral capsule (ALL/LC), the posterior oblique ligament (POL), and the posteromedial capsule (PMC) would significantly increase internal rotation and that the anteromedial capsule (AMC), and the popliteus tendon and popliteofibular ligament (PLT/PFL) when sectioned would lead to a significant increase in external rotation of the knee. Methods: Ten pairs ( n = 20) of cadaveric knees were assigned to two sequential cutting groups (posterolateral-to-posteromedial and posteromedial-to-posterolateral). Specimen were subjected to 5 N-m of internal and external rotation torque at knee flexion angles 0° through 90° in the intact and after each cut state. Rotational changes were measured and compared to the intact and previous states following each cut. Results: Sectioning of the ITB significantly increased internal rotation at 60° and 90° by 5.4° and 6.2[[Unsupported Character - Codename ­]]°, respectively (after ALL/LC cut) and 3.5° and 3.8° (prior to ALL/LC cut) ( Figure 1 ). At 60° and 90°, section of the ALL/LC produced significant increases in internal rotation of 3.1[[Unsupported Character - Codename ­]]° and 3.5°, respectively (after ITB cut) and of 0.5° (prior to ITB cut) ( Figure 1 ). At 0°, section of the POL produced significant increases in internal rotation of 2.0° (ITB intact) and 1.8° (after ITB cut) ( Figure 1 ). Sectioning the PLT/PFL complex significantly increased external rotation at 60° and 90° by 2.7° and 2.9°, respectively (prior to sectioning medial structures) and 2.2° and 2.7[[Unsupported Character - Codename ­]]°, respectively (after sectioning medial structures) ( Figure 2 ). Sectioning the AMC produced significant increases in external rotation at 30°- 90° of flexion, however the magnitude of change was < 1° ( Figure 2 ). [Figure: see text][Figure: see text] Conclusion: Collectively the anterolateral corner structures had a primary role in internal rotational control of the knee from 60° to 90° of knee flexion. The ITB was the most significant primary stabilizer for internal rotation in ACL intact knees. The POL contributed to internal rotational control at full extension, while the PLT/PFL complex controlled external rotation of the knee at higher flexion angles (60° and 90°). Internal rotation control of the knee has been mainly attributed to the cruciate and collateral ligaments. This study delineates the primary and secondary roles of the ITB, the ALL/LC, POL and PLT/PFL to rotatory stability of the knee. As such, it provides new information about the understanding of rotational instabilities of the knee.

scholarly journals A proposal for a new morphological classification of the popliteus muscle tendon with potential clinical and biomechanical significance

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Łukasz Olewnik ◽  
Robert F. LaPrade ◽  
Friedrich Paulsen ◽  
Bartosz Gonera ◽  
Konrad Kurtys ◽  
...  
Keyword(s):  
Morphological Variability ◽  
Lower Limbs ◽  
Popliteus Tendon ◽  
Type I ◽  
Popliteofibular Ligament ◽  
Morphological Variations ◽  
Type Iv ◽  
Orthopedic Surgeons ◽  
Popliteus Muscle

AbstractThe purpose of this study was to characterize the morphological variations in the proximal attachments and create an accurate classification of the PPM for use in planning surgical procedures in this area, for evaluating radiological imaging and rehabilitation. One hundred and thirty-four lower limbs of body donors (52 woman and 82 man) fixed in 10% formalin solution were examined. The popliteus muscle was present in all 134 limbs. Four main types were identified with subtypes. The most common type was Type I (34.3%), characterized by a single tendon in the popliteus sulcus. Type II (30.6%) characterized by a main tendon in the popliteus sulcus and accessory bands. This type was divided into five subtypes (A–E) based on presence of specific accessory bands. Type III (15.3%) was characterized by two tendons in the popliteal sulcus. Type IV (19.4%) was characterized by two tendons in the popliteus sulcus and additional bands. This type was also divided into five subtypes (A–E) based on presence of specific accessory bands. The popliteofibular ligament was present in 90.3% of cases. A new classification based on a proximal attachment is proposed. The popliteus tendon is characterized by a very high morphological variability, which can affect posterolateral knee stability and the natural rotation of the tibia. Such a classification system may be useful for clinicians performing medical procedures within the knee joint, including orthopedic surgeons.

Arthroscopic identification of the popliteofibular ligament

2001 ◽  
Vol 17 (9) ◽  
pp. 932-939 ◽  
Author(s):  
Eric R. Aronowitz ◽  
Richard D. Parker ◽  
Charles J. Gatt
Keyword(s):  
Popliteofibular Ligament

scholarly journals The popliteofibular ligament: a cadaveric ultrasound study

2021 ◽  
Author(s):  
Przemysław A. Pękala ◽  
Ewa Mizia ◽  
Mitchell R. Mann ◽  
Ilona Wagner-Olszewska ◽  
Marcin Mostowy ◽  
...  
Keyword(s):  
Styloid Process ◽  
Viable Alternative ◽  
Slice Thickness ◽  
Morphometric Characteristics ◽  
Popliteofibular Ligament ◽  
Ultrasound Study ◽  
Fresh Frozen ◽  
Magnetic Resonance Imaging Mri ◽  
Us Findings

Abstract Objective The popliteofibular ligament (PFL) is an important stabilizer of the knee found within the posterolateral corner (PLC) of the joint. Injuries to the PLC can cause substantial patient morbidity. Accurate PFL visualization has been historically challenging, impeding injury diagnosis and treatment. The gold standard for in vivo PFL visualization is magnetic resonance imaging (MRI), but this procedure has slice thickness limitations, is costly, and is subject to longer wait times. Ultrasonographic (US) PFL assessment is a potentially viable alternative to MRI. This study aimed to determine the viability of US PFL assessment. Materials and methods Ten fresh-frozen lower limb specimens were evaluated for the presence and morphometric characteristics of the PFL via US using an 18.0-MHz linear transducer. The cadavers were then dissected and reassessed for the presence and morphometric characteristics of the PFLs for comparison with US findings. Moreover, the fracture of the fibular styloid process near the site of the insertion of the PFL (the arcuate sign) was simulated and assessed via US. Results The PFL was visualized and measured in all ten knees via both US and cadaveric assessments. There were no statistically significant differences in PFL morphometric characteristics determined via US examination and dissection. The fibular styloid fracture was easily identified in US examination. Conclusion US imaging is a viable alternative for accurate and effective assessment of the normal PFL. Moreover, the arcuate sign can be evaluated via US.

The Popliteofibular Ligament

1996 ◽  
Vol 24 (3) ◽  
pp. 311-316 ◽  
Author(s):  
Michael J. Maynard ◽  
Xianghua Deng ◽  
Thomas L. Wickiewicz ◽  
Russell F. Warren
Keyword(s):  
Popliteofibular Ligament

scholarly journals Sequential Damage Assessment of the Posterolateral Complex of the Knee Joint: A Finite Element Study

2021 ◽  
Author(s):  
Cong-Cong Wu ◽  
Li-Mei Ye ◽  
Xiao-fei Li ◽  
Lin-Jun Shi
Keyword(s):  
Finite Element ◽  
Knee Joint ◽  
External Rotation ◽  
Lateral Collateral Ligament ◽  
Fe Model ◽  
Popliteus Tendon ◽  
Popliteofibular Ligament ◽  
Instantaneous Axis Of Rotation ◽  
Property Data ◽  
Posterolateral Complex

Abstract Background. The posterolateral complex (PLC), which consists of the popliteus tendon (PT), lateral collateral ligament (LCL), and popliteofibular ligament (PFL), is an indispensable structure of the knee joint. The aim of this study was to explore the functionality of the PLC by determining the specific role of each component in maintaining posterolateral knee stability. Methods. A finite element (FE) model was generated based on previous material property data and magnetic resonance imaging of a volunteer’s knee joint. The injury order of the PLC was set as LCL, PFL, and PT. A 134 N anterior load was applied to the tibia to investigate tibial displacement (TD). Tibial external rotation (TER) and tibial varus angulation (TVA) were measured under bending motions of 5 and 10 Nm. The instantaneous axis of rotation (IAR) of the knee joint under different rotation motions was also recorded. Results. The TD of the intact knee under a 134 N anterior load matched the values determined in previous studies. Our model showed consistent increases in TD, TVA, and TER after sequential damage of the PLC. In addition, sequential disruption caused the IAR to shift superiorly and laterally during varus rotation, and medially and anteriorly during external rotation. In the dynamic damage of the PLC, LCL injury had the largest effect on TD, TVA, TER, and IAR. Conclusions. Sequential injury of the PLC caused considerable loss of stability of the knee joint according to an FE model. The most significant structure of the PLC was the LCL.

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