Quiz on Temporomandibular Joint (TMJ)

Which of the following correctly describes the temporomandibular joint (TMJ)?

• It is a unilateral diarthrosis

• It is covered by hyaline cartilage

• It performs both hinge and sliding movements

• It is not influenced by movement of the mandible

The articular surfaces of the TMJ are primarily covered by which type of cartilage?

• Hyaline cartilage

• Elastic cartilage

• Fibrocartilage

• Calcified cartilage

The articular disc of the TMJ is composed of which type of collagen?

• Type 1 collagen

• Type 2 collagen

• Type 3 collagen

• Type 4 collagen

Which region of the articular disc is the thinnest?

• Posterior band

• Anterior band

• Intermediate zone

• Medial border

The articular disc divides the TMJ into which two compartments?

• Upper and lower retrodiscal tissues

• Superior and inferior retrodiscal spaces

• Upper and lower joint spaces

• Anterior and posterior compartments

What is the function of the superior retrodiscal lamina in the TMJ?

• Prevents anterior dislocation of the disc

• Facilitates posterior movement of the mandible

• Limits excessive opening of the mouth

• Prevents excessive rotation of the disc

Which ligament prevents posterior dislocation of the TMJ disc?

• Stylomandibular ligament

• Inferior retrodiscal lamina

• Lateral ligament (inner horizontal portion)

• Capsular ligament

The TMJ is primarily innervated by which nerve?

• Facial nerve

• Auriculotemporal nerve

• Hypoglossal nerve

• Masseteric nerve

What role does the synovial membrane play in the TMJ?

• Divides the joint into two spaces

• Connects the mandible to the temporal bone

• Secretes fluid to reduce friction

• Prevents excessive mouth opening

Which of the following statements about the capsular ligament is true?

• It limits excessive mouth opening

• It retains synovial fluid within the joint

• It prevents anterior dislocation of the disc

• It is not innervated