Advanced Maxilla Quiz

Q1. Why can an orbital floor fracture produce numbness of the upper cheek, lateral nose, upper lip, and related facial regions?

• The facial nerve runs through the infraorbital canal
• The mandibular nerve exits through the infraorbital foramen
• The infraorbital nerve courses within the maxillary orbital floor
• The hypoglossal nerve lies in the orbital floor

Q2. Why can maxillary sinus disease produce pain perceived in the upper teeth?

• The optic nerve supplies the upper teeth
• Dental roots and superior alveolar nerves are closely related to the sinus
• The inferior alveolar nerve crosses the sinus
• The facial nerve enters every maxillary tooth socket

Q3. Why is drainage from the maxillary sinus potentially less efficient when a person is upright?

• The ostium lies below the sinus floor
• The sinus has no opening into the nasal cavity
• The sinus drains through the mandibular canal
• The natural ostium lies relatively high on the medial sinus wall

Q4. Why can fractures of the maxilla disrupt both dental occlusion and midfacial stability?

• The maxilla combines tooth support with major facial buttress functions
• The maxilla has no craniofacial articulations
• The maxilla is freely mobile in the normal adult
• The upper teeth are supported entirely by the palatine bones

Q5. Why is the maxilla involved in several classic Le Fort fracture patterns?

• The maxilla is isolated from the facial skeleton
• The maxilla is a central structural component of the midface
• The maxilla forms the posterior cranial fossa
• The maxilla forms the mandibular condyle

Q6. Why can posterior maxillary dental procedures risk posterior superior alveolar neurovascular structures?

• They run through the optic canal
• These structures enter foramina on the posterior maxilla
• They enter through the mental foramen
• They cross the mandibular notch

Q7. Why is the palatine process of the maxilla important for separation of respiratory and digestive passages?

• It separates the orbit from the cranial cavity
• It forms a bony partition between nasal and oral cavities
• It forms the posterior wall of the pharynx
• It divides the right and left orbits

Q8. Why is the frontal process of the maxilla clinically important in nasolacrimal anatomy?

• It encloses the pituitary gland
• It forms the mandibular canal
• It contributes to the lacrimal sac fossa and drainage pathway
• It contains the internal acoustic meatus

Q9. Why can tooth extraction create an abnormal communication between the oral cavity and maxillary sinus?

• The hard palate normally contains a large permanent opening
• The maxillary sinus lies inside the mandible
• Posterior tooth roots can be separated from the sinus by very thin bone
• The mandibular canal opens into the sinus

Q10. Which statement best integrates the anatomy of the maxilla?

• It forms only the lower jaw and temporomandibular joint
• It contains the inner ear and forms the mastoid process
• It integrates dentition, sinus, orbit, nasal cavity, palate, neurovascular pathways, and facial support
• It is an isolated bone of the cranial vault