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Knee Injury - can your kneecap pop out of place⁉️ Patellar (kneecap) dislocations, most commonly in the lateral direction, carry high risk of recurrent ##patellainstability. The medial patellofemoral ligament (MPFL) is one of multiple ligaments found surrounding the patella and is one of the primary stabilizers of the patella. 94–100% of patients suffer from medial patellofemoral ligament rupture after first time patellar dislocation. Due to a six degree valgus angle between the femur (thigh bone) and tibia (shin bone) in the coronal plane along with a similar angle between the trochlear groove and the tibial tubercle, there is a lateral force vector acting on the patella with the contraction of the quadriceps. The primary role of the MPFL is to resist this lateral movement of the ##kneecapand to keep the patella centered within the patellofemoral groove. MPFL is most commonly injured during lateral patellar dislocation which typically occurs when the foot is planted and an internal rotatory force is applied to the flexed knee in valgus. The ##MPFLis the most important structure that is injured in cases of acute dislocation of the patella. MPFL (medial patellofemoral ligament) Anatomy MPFL is located within layer (2) of the (3) soft tissue layers of the medial aspect of the knee. It originates between the medial epicondyle of femur and adductor tubercle, superior to superficial medial collateral ligament origin. The patellar attachment occupies 2/3 of the proximal patellar border in 57% of cases, the proximal half in 41%, the distal end in ~1.5% and extends across the entire patella in ~1.3% of patients. The proximal insertion of the MPFL extends to the quadriceps tendon while distally the ligament passes deep to the distal vastus medialis obliquus that also inserts on the medial border of the patella. The MPFL contacts the aponeurosis of the vastus intermedius creating an anatomical aponeurosis that is important for medial patellofemoral joint stability, as it facilitates a dynamic system that guides and pushes the patella into the trochlear groove during active flexion #r9kneeinjury #kneepain #patella #kneecap #mpfl
Duration: 27 sPosted : Mon, 15 Apr 2024 14:47:57Views
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