Anatomy of the Right Temporomandibular Joint (TMJ)
This exhibit depicts the normal anatomy of the temporomandibular joint (TMJ). The TMJ is a synovial joint composed of the mandibular fossa of the squamous temporal bone, condylar process of the mandible, and the fibrocartilaginous articular disc. The articular disc divides the joint space into upper and lower compartments. The lower compartment is responsible for primary rotational movement as the jaw opens and the upper compartment is responsible for secondary translational movement.