TMJ Review

What type of cartilage covers the articular surfaces of the TMJ?

• Hyaline Cartilage

• Firbrocartilage

• Elastic Cartilage

The medial and lateral pterygoid muscles originate on what bone in the skull?

• Temporal

• Zygomatic

• Ethmoid

• Sphenoid

Which muscle helps with positioning of the disk in the TMJ?

• Medial Pterygoid, anterior head

• Medial Pterygoid, posterior head

• Lateral Pterygoid, superior head

• Lateral Pterygoid, inferior head

What is the purpose of the retrodiscal laminae in the TMJ?

• To protect the articular surface of the mandibular condyle

• To tether the disk and pull it back into position during closing

• To help move the disk anteriorly during opening

• To limit posterior translation of the disk during closing

Where is the lateral pterygoid plate in relation to the TMJ?

• Anterior

• Posterior

• Lateral