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This is the normal left knee muscle model of a 56 year old male with right anterior thigh pleomorphic leiomyosarcoma. This is an STL file created from DICOM images of his CT scan which may be used for 3D printing.


The knee is composed of 3 separate joints: two hinge joints (medial and lateral femorotibial joints), and one sellar, or gliding, joint (the patellofemoral joint). These also compose the three compartments of the knee: medial, lateral, and patellofemoral. Although the knee is thought of as a hinge joint, it actually has 6 degrees of motion: extension/flexion, internal/external rotation, varus/valgus, anterior/posterior translation, medial/lateral translation, and compression/distraction. In order to provide stability to this inherently unstable knee, static and dynamic stabilizers surround the knee, including muscles and ligaments.


On the medial aspect of the knee, the static stabilizers consist of the superficial and deep medial collateral ligaments (MCL) and the posterior oblique ligament (POL). The dynamic stabilizers are the semimembranosus, vastus medialis, medial gastrocnemius, and pes tendons (semitendinosus, gracilis, and sartorius). The lateral stabilizers are best known as the posterolateral corner, and consist of the static stabilizers (lateral collateral ligament (LCL), iliotibial band (ITB), arcuate ligament), and dynamic stabilizers (popliteus, biceps femoris, lateral gastrocnemius). Inside the joint, the anterior cruciate ligament provides resistance to anterior tibial translation varus, and internal rotation, whereas the posterior cruciate ligament provides resistance to posterior tibial translation, varus, valgus, and external rotation.


This model was created from the file STS_014.

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Edited in Meshmixer

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