What is the function of the articular disk?
The cartilaginous articular disc is situated between the condyle and the fossa and acts as a cushion that absorbs stress and allows the condyle to move easily when the mouth opens and closes.
Which of the following are functions of articular cartilage?
Articular cartilage is a thin layer of specialized connective tissue with unique viscoelastic properties. Its principal function is to provide a smooth, lubricated surface for low friction articulation and to facilitate the transmission of loads to the underlying subchondral bone.
What are the functions of articular disc in TMJ?
The articular disc is a fibrous extension of the capsule in between the two bones of the joint. The disc functions as articular surfaces against both the temporal bone and the condyles and divides the joint into two sections, as already described.
What’s an articular disc?
Medical Definition of articular disk : a cartilage (as the meniscus of the temporomandibular joint) interposed between two articular surfaces and partially or completely separating the joint cavity into two compartments.
Which joints have articular disc?
Disks are found in the temporomandibular joint of the lower jaw, the sternoclavicular (breastbone and collarbone) joint, and the ulnocarpal (inner forearm bone and wrist) joint.
Which muscles attaches to the articular disc?
The articular disk is attached superiorly and inferiorly to the capsular ligament, which covers the entire TMJ. Anteriorly, the disk is attached to the superior lateral pterygoid muscle fibers, a part of one of the main masticatory muscles (Figure 3).
What is the function of articular cartilage quizlet?
What is Articular Cartilage? Hyaline cartilage covering bone ends at moveable joints. What is the purpose of the outer layer (fibrous capsule) of the Articular Capsule? It strengthens the joint so that the bones don’t pull apart.
What joints have articular disc?
Do synovial joints have articular cartilage?
Articular Cartilage The articulating surfaces of a synovial joint (i.e. the surfaces that directly contact each other as the bones move) are covered by a thin layer of hyaline cartilage. The articular cartilage has two main roles: (i) minimising friction upon joint movement, and (ii) absorbing shock.
The presence of an articular disk also permits a more even distribution of forces between the articulating surfaces of bones, increases the stability of the joint, and aids in directing the flow of synovial fluid to areas of the articular cartilage that experience the most friction. Click to see full answer.
What is the structure and function of articular cartilage?
Articular Cartilage Function Articular cartilage function is based upon its composition of hyaline cartilage, which is practically frictionless due to the glass-like surface and ability to self-lubricate via lubricating glycoproteins within the extracellular matrix.
What is articular disc displacement without reduction without reduction?
Articular disc displacement without reduction is a progression of articular disc displacement with reduction. When the condition is acute, the opening is limited to less than 25 mm with an end-range deviation toward the affected joint, limited contralateral lateral excursion, and deviation of the mandible toward the affected side with protrusion.
What is the function of the articular disc in TMJ?
The articular disc in the TMJ has an important functional role. It fills the space between the condyle and the temporal bone, and acts as a stress absorber and distributors during the jaw activity.