patellar dislocation

patellar dislocation

Orthopedics A subluxation, usually lateral, of the patella, due to a sudden change in direction while running and the knee is under stress; may follow injury, accompanied by pain and inability to walk. See GLC7.
References in periodicals archive ?
During the extensional motion of the knee, VMO is contracted before musculus vastus lateralis which pre-activates the medial force vectors, thus, preventing the lateral patellar dislocation.
This study aimed to use magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI) to evaluate vastus medialis oblique (VMO) fiber bundles in patients with recurrent patellar dislocation to explore the changes in muscle morphology and function.
Beyond 60[degrees], further flexion was possible only with patellar dislocation.
Patellar dislocation is a complete displacement of the patella from the trochlear groove of the femur.
Although sacrifice of the SLGA may occurs during lateral soft tissue release, some have suggested no effect on soft tissue healing, patellar dislocation, radiolucency, loosening, or fracture.
Keywords: Knee, Multiligament injuries, Medial collateral ligament, Medial patellofemoral ligament, Patellar dislocation.
Plain radiographs were obtained in the emergency department confirming the diagnosis of a lateral patellar dislocation with a 9 mm avulsion fracture of anterior medial border of the patella (Figures 1(a) and 1(b)).
Kurimura, "Chondral and osteochondral injuries associated with acute patellar dislocation," Arthroscopy, vol.
10) (With the patient lying with the knee flexed to 20[degrees], place thumbs on the medial patella and push laterally; the patient will straighten leg with pain or "apprehension" prior to patellar dislocation.
Other pathologies to consider in an adolescent with knee pain, tenderness and disability of the knee joint (of the extensor mechanism) include patellar ligament rupture, quadriceps tendinopathy, quadriceps tendon rupture, patellar dislocation, chondromalacia patellae and prepatellar bursitis.
A case of intra-articular synovial lipoma of the knee joint causing patellar dislocation.
Potential subjects were excluded if they were pregnant or a competitive athlete or had a disabling general illness, reported knee ligamentous or meniscal injury, previous knee surgery, a history of patellar dislocation, other knee problems, or physical therapy for PFPS in the previous 4 weeks.