Medical University-Level MCQs on the Temporomandibular Joint (TMJ) PDF

### Medical University-Level MCQs on the Temporomandibular Joint (TMJ) #### **Basic Anatomy and Articulation** 1. **Which bones form the temporomandibular joint (TMJ)?** - A. Mandible and maxilla - B. Mandible and zygomatic bone - C. Mandible and temporal bone - D. Mandib...

### Medical University-Level MCQs on the Temporomandibular Joint (TMJ) #### **Basic Anatomy and Articulation** 1. **Which bones form the temporomandibular joint (TMJ)?** - A. Mandible and maxilla - B. Mandible and zygomatic bone - C. Mandible and temporal bone - D. Mandible and sphenoid bone **Answer:** C. Mandible and temporal bone 2. **The articular disc of the TMJ is primarily composed of:** - A. Hyaline cartilage - B. Elastic cartilage - C. Fibrocartilage - D. Dense regular connective tissue **Answer:** C. Fibrocartilage 3. **Which part of the TMJ allows for gliding movements?** - A. Lower compartment - B. Upper compartment - C. Joint capsule - D. Articular disc **Answer:** B. Upper compartment 4. **The type of joint represented by the TMJ is:** - A. Ball-and-socket joint - B. Hinge joint - C. Saddle joint - D. Synovial joint **Answer:** D. Synovial joint --- #### **Muscles of Mastication** 5. **Which muscle is primarily responsible for elevation of the mandible?** - A. Lateral pterygoid - B. Medial pterygoid - C. Digastric - D. Mylohyoid **Answer:** B. Medial pterygoid 6. **Which muscle protrudes the mandible?** - A. Temporalis - B. Masseter - C. Lateral pterygoid - D. Sternohyoid **Answer:** C. Lateral pterygoid 7. **The posterior fibers of the temporalis muscle are responsible for which movement?** - A. Depression of the mandible - B. Protrusion of the mandible - C. Retraction of the mandible - D. Lateral deviation of the mandible **Answer:** C. Retraction of the mandible 8. **Which muscle contributes to the opening of the mouth?** - A. Masseter - B. Temporalis - C. Lateral pterygoid - D. Medial pterygoid **Answer:** C. Lateral pterygoid --- #### **Neurovascular Supply** 9. **The primary nerve supply to the TMJ is provided by:** - A. Maxillary nerve - B. Auriculotemporal nerve - C. Inferior alveolar nerve - D. Buccal nerve **Answer:** B. Auriculotemporal nerve 10. **The blood supply to the TMJ is primarily derived from which artery?** - A. Internal carotid artery - B. External carotid artery - C. Maxillary artery - D. Ascending pharyngeal artery **Answer:** B. External carotid artery 11. **Which vein primarily drains the TMJ?** - A. Facial vein - B. Retromandibular vein - C. External jugular vein - D. Pterygoid venous plexus **Answer:** B. Retromandibular vein --- #### **Ligaments** 12. **The lateral ligament of the TMJ serves to:** - A. Prevent posterior dislocation of the mandible - B. Restrict lateral movements of the mandible - C. Stabilize the mandible during depression - D. Limit excessive retraction of the mandible **Answer:** A. Prevent posterior dislocation of the mandible 13. **Which ligament extends from the sphenoid bone to the mandibular foramen?** - A. Lateral ligament - B. Stylomandibular ligament - C. Sphenomandibular ligament - D. Medial ligament **Answer:** C. Sphenomandibular ligament --- #### **Clinical Correlations** 14. **Which of the following is the most common cause of temporomandibular joint disorder (TMD)?** - A. Mandibular fracture - B. Arthritis - C. Bruxism (teeth grinding) - D. Infections **Answer:** C. Bruxism (teeth grinding) 15. **Dislocation of the TMJ usually occurs in which direction?** - A. Anterior - B. Posterior - C. Superior - D. Inferior **Answer:** A. Anterior 16. **In osteoarthritis of the TMJ, which structure is primarily affected?** - A. Ligaments - B. Articular disc - C. Synovial membrane - D. Mandibular condyle **Answer:** B. Articular disc 17. **Which nerve is most likely compressed in TMJ disorders causing referred pain to the ear?** - A. Facial nerve - B. Auriculotemporal nerve - C. Inferior alveolar nerve - D. Greater auricular nerve **Answer:** B. Auriculotemporal nerve --- These questions are crafted to cover the anatomy, function, and clinical aspects of the TMJ, suitable for university-level exams. Let me know if you'd like more or a focus on specific areas!