TMJ Overview/Joint Bones
The joint on each side of the head that allows for movement of the mandible for mastication, speech, andrespiration.
What is the temporomandibular joint (TMJ)
The articulation of the temporal bone and the mandible on each side of the head, the bones of which give the joint its name
What is the TMJ
The fibrous joint that completely encloses the TMJ
What is a joint capsule
A band of fibrous tissue that connects bones.
What is a ligament
The TMJ allows for the movement of the mandible during BLANK and BLANK by way of eachmuscleattached to the cranium and mandible.
What is speech and mastication
The site of junction or union between two or more bones
What is a joint
The cranial bone that articulates with the facial bone of the mandible at the TMJ by way of the joint disc
What is the temporal bone
Located between the temporal bone and mandibular condyle on each side, allowing articulation between the two bones.
What is the fibrous joint disc or meniscusis
Three paired ligaments are associated with the TMJ: temporomandibular, stylomandibular, and sphenomandibular ligaments
What are the temporomandibular, stylomandibular, and sphenomandibular ligaments
There are two basic types of movement performed by the joint and its associated muscles:
What is gliding (or sliding) and rotational (or hinge) movements.
The auriculotemporal and masseteric branches of the mandibular nerve (or third division) of the fifth cranial or trigeminal nerve; motor function is by the muscles of mastication
What is TMJ sensory innervation
The location of the articulating area on the temporal bone of the joint
What is the bone inferior aspect involving its squamous part.
The disc completely divides the TMJ into two compartments or synovial cavities: the upper and lower synovial cavities.
What is the upper and lower synovial cavities.
Located on the lateral side of each joint forming a reinforcement of the lateral part of the joint capsule of the TMJ.
what is the temporomandibular ligament
The gliding movement of the TMJ occurs mainly between the BLANK in the upper synovial cavity, with the disc plus the condyle moving forward or backward, and down and up the articular eminence.
What is the disc and the articular eminence of the temporal bone
The supply to the joint is from branches of the external carotid artery, predominantly the superficial temporal branch. The venous return is by the superficial temporal, maxillary, and pterygoid plexus of veins. The lymph from the TMJ is drained deeply into the superior deep cervical nodes.
What is the blood supply
This articulating area includes the temporal bone’s articular eminence and articular fossa
What is the articular fossa
The membranes lining the inside of the BLANK secrete synovial fluid that helps lubricate the joint and fills the synovial cavities.
What is the Joint Capsule
The TMJ ligament prevents the excessive retraction or moving backward of the BLANK, a situation that might lead to difficulties with the movement of the TMJ.
What is the mandible
Bringing the lower jaw forward involves BLANK of the mandible.
BLANK involves the bilateral contraction of both of the lateral pterygoid muscles
What is protrusion
The facial bone that articulates with the temporal bone of the cranium. This articulation is accomplished by way of the joint disc working with the knuckle-shaped posterosuperiorprocess of of the mandibular ramus.
What is the mandible
The articular eminence consists of a rounded protuberance on the inferior aspect of
What is the zygomatic process
The stylomandibular ligament is a variable ligament formed from thickened cervical fascia in the area.
It also becomes taut when the mandible is protruded
What is the stylomandibular ligament
The rotational movement of the TMJ occurs mainly between the disc and the mandibular condyle in the lower synovial cavity.
The axis of rotation of the disc plus the condyle is approximately transverse, and the movements accomplished are
What is depression or elevation of the mandible