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Anatomy of the TemporoMandibular Joint (TMJ) Quiz

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Anatomy of the TemporoMandibular Joint (TMJ) Quiz

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Questions and Answers

What type of joint is the TemporoMandibular Joint (TMJ)?

Fibrous and non-synovial joint

Pivot and hinge joint

Cartilaginous and non-diarthrodial joint

Diarthrodial and synovial joint (correct)

What does the synovial fluid in the TMJ act as?

Mechanical reinforcement for the mandible

Joint lubricant and supplier of metabolic needs (correct)

Nourishment for the articular facets

Structural support and cushioning

How many articulating surfaces compose the TMJ?

Three

Five

Four (correct)

Two

What is the TMJ disc composed of?

Dense fibrous connective tissue Signup and view all the answers

How many general regions can the TMJ disc be divided into as viewed from the lateral perspective?

Three Signup and view all the answers

What are the osseous elements that form the TemporoMandibular Joint?

The squamous portion of the temporal bone and the condyle of the mandible. Signup and view all the answers

How is the joint cavity of the TMJ divided?

The joint cavity is divided into an upper and a lower compartment. Signup and view all the answers

What lines the inner side of the articular capsule and disc in the TMJ?

A synovial membrane. Signup and view all the answers

What fills the joint compartments of the TMJ?

Synovial fluid produced by the lining membrane. Signup and view all the answers

What is the function of the synovial fluid in the TMJ?

Synovial fluid lubricates the joint and nourishes the articular cartilage. Signup and view all the answers

Study Notes

TemporoMandibular Joint (TMJ)

The TemporoMandibular Joint (TMJ) is a synovial hinge-type joint.

Composition of the TMJ

The TMJ has two articulating surfaces.
The TMJ disc is composed of fibrocartilage.
The TMJ disc can be divided into three general regions when viewed from the lateral perspective: anterior, intermediate, and posterior.

Formation of the TMJ

The osseous elements that form the TemporoMandibular Joint are the mandibular fossa of the temporal bone and the condyle of the mandible.

Joint Cavity of the TMJ

The joint cavity of the TMJ is divided into upper and lower compartments.

Inner Lining of the TMJ

The inner side of the articular capsule and disc in the TMJ is lined with synovial membrane.

Joint Compartments of the TMJ

The joint compartments of the TMJ are filled with synovial fluid.

Function of the Synovial Fluid

The synovial fluid in the TMJ acts as a lubricant and shock absorber.
The function of the synovial fluid in the TMJ is to reduce friction and absorb shock between the articulating bones.

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Description

Test your knowledge of the anatomy of the TemporoMandibular Joint (TMJ) with this quiz. Explore the structure and function of the TMJ, including the temporal bone, mandible, disc/meniscus, ligaments, and synovial membrane.