articular discs, check these out | Which joints have articular discs?

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.

Which joints have articular discs?

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. A pair of menisci is found in each knee joint, one between each femoral condyle and its female tibial counterpart.

Where is articular disc located?

The articular disk is a thin, oval plate, placed between the condyle of the mandible and the mandibular fossa. Its upper surface is concavo-convex from before backward, to accommodate itself to the form of the mandibular fossa and the articular tubercle.

What is articular cartilage?

The bones that meet at synovial joints are covered with a thin layer of cartilage known as articular cartilage. (Articular simply means “having to do with joints.”) Articular cartilage forms a smooth, durable covering (almost the consistency of linoleum) at the end of each bone in the joint.

Is the meniscus and articular disc?

A meniscus is a crescent-shaped fibrocartilaginous anatomical structure that, in contrast to an articular disc, only partly divides a joint cavity. In humans they are present in the knee, wrist, acromioclavicular, sternoclavicular, and temporomandibular joints; in other animals they may be present in other joints.

What does articular disc mean?

Articular disc – The articular disc is a fibrous extension of the capsule that runs between the two articular surfaces of the temporomandibular joint. The disc articulates with the mandibular fossa of the temporal bone above and the condyle of the mandible below.

What is the purpose of articular disc?

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.

What is the articular disc composed of?

The articular disc of the temporomandibular joint (TMJ) is composed of fibrocartilage, and the extracellular matrix of this disc is composed mainly of collagen, glycosaminoglycan and proteoglycans.

Do all synovial joints have articular discs?

Many, but not all, synovial joints also contain additional structures: Articular discs or menisci – the fibrocartilage pads between opposing surfaces in a joint. Articular fat pads – adipose tissue pads that protect the articular cartilage, as seen in the infrapatellar fat pad in the knee.

What does articular cartilage look like?

Articular cartilage is the smooth, white tissue that covers the ends of bones where they come together to form joints. Healthy cartilage in our joints makes it easier to move. It allows the bones to glide over each other with very little friction.

What is the difference between articular cartilage and meniscus?

Recap. There are two types of cartilage in the knee. The articular cartilage covers the bone ends. The meniscus sits between bone ends to provide a cushion for the joint.

Can disc displacement go away?

The good news is that in most cases — 90% of the time — pain caused by a herniated disc will go away on its own within six months. Initially, your doctor will likely recommend that you take an over-the-counter pain reliever and limit activities that cause pain or discomfort.

What is articular disc in TMJ?

Articular disc – The articular disc is a fibrous extension of the capsule that runs between the two articular surfaces of the temporomandibular joint. The disc articulates with the mandibular fossa of the temporal bone above and the condyle of the mandible below.

How do I know if my TMJ disc is displaced?

Disk displacement with reduction typically manifests with clicking/popping and pain with jaw use (such as chewing). Disk displacement without reduction does not manifest with clicking/popping, but maximum jaw opening is limited to ≤ 30 mm. Surrounding tissues may become painfully inflamed (capsulitis).