What is the articular eminence?
The articular eminence is a part of the temporal bone on which the condylar process slides during mandibular movements. The inclination of articular eminence varies among people and it dictates the path of condylar movement as well as the degree of rotation of the disc over the condyle. 1,2.
What is TMJ in radiology?
The temporomandibular joint (TMJ) is an atypical synovial joint located between the condylar process of the mandible and the mandibular fossa and articular eminence of the temporal bone. It is divided into a superior discotemporal space and inferior discomandibular space by the TMJ disc (or meniscus).
What movements occur at the temporomandibular joint?
A variety of movements occur at the TMJ. These movements are mandibular depression, elevation, lateral deviation (which occurs to both the right and left sides), retrusion and protrusion.
What type of synovial joint is the temporomandibular?
The temporomandibular joint (TMJ), also known as the mandibular joint, is an ellipsoid variety of the right and left synovial joints forming a bicondylar articulation.
What is articular space?
The articular disk (or disc) is a thin, oval plate of fibrocartilage present in several joints which separates synovial cavities. This separation of the cavity space allows for separate movements to occur in each space. Articular disk.
Is articular eminence and tubercle same?
The articular eminence is that part of the temporal fossa over which the condyle-disk complex slides during the various mandibular movements. It is often confused with the articular tubercle, which is an entirely different structure.
Can TMJ be detected by xray?
Conventional radiographs have a limited role in evaluation of the TMJ. They can be used to evaluate only the bony elements of the TMJ. They do not give useful information when it comes to the non-bony elements such as cartilage or adjacent soft tissues.
Can a CT scan detect TMJ?
Computed tomography (CT) First used for TMJ evaluation in 1980 [24], CT is considered to be the best method for assessing osseous pathologic conditions of TMJ. It allows a multi planar reconstruction (sagittal, axial, coronal) of TMJ structures, obtaining 3D images in closed and opened-mouth positions.
What is mandibular movement?
Mandibular movement refers to the muscle- and ligament-activated border and/or intraborder movements of the lower jaw. There are five types of mandibular movements including rotational, horizontal axis, frontal axis, sagittal axis, and translational.
What is the gliding movement?
Gliding is a body movement term in anatomy. What is gliding? Gliding occurs when the surfaces of bones slide past one another in a linear direction, but without significant rotary or angular movement. If you wave your hand from side to side, gliding will occur as the carpal bones of the wrist slide over one another.
Is TMJ a bone or muscle?
Temporomandibular joint A soft cartilage disk acts as a cushion between the bones of the joint, so the joint can move smoothly. The temporomandibular (tem-puh-roe-man-DIB-u-lur) joint (TMJ) acts like a sliding hinge, connecting your jawbone to your skull.
What is the function of TMJ?
The temporomandibular joint commonly referred to as the TMJ is located below your ears on either side of the head. This complex joint enables a range of motion; helping you speak, chew, swallow, yawn, and move your jaw.