Advanced Mandible Quiz

Q1. Why is the mandibular foramen an important landmark for an inferior alveolar nerve block?

• The maxillary nerve exits the skull there
• The lingual nerve travels through the mandibular canal
• The facial nerve enters the mandible there
• The inferior alveolar nerve enters the mandible at this foramen

Q2. Why can a mandibular body fracture cause numbness of the lower lip and chin?

• Injury can affect the inferior alveolar or mental nerve pathway
• The vagus nerve exits through the mental foramen
• The facial nerve runs inside the mandibular canal
• The optic nerve crosses the mandibular body

Q3. Why can fractures of the mandibular condylar process alter occlusion and jaw movement?

• The condyle forms the hard palate
• The condyle anchors the nasal septum
• The condyle contains the maxillary sinus
• The condyle is the mandibular component of the temporomandibular joint

Q4. Why are fractures of the angle of the mandible influenced by muscle attachments?

• Temporalis and diaphragm surround the angle
• Buccinator and orbicularis oculi form the mandibular sling
• Sternocleidomastoid inserts on both sides of the angle
• Masseter and medial pterygoid forces act around the mandibular angle

Q5. Why is the relationship of the mandibular canal to molar roots clinically important?

• The optic nerve lies beneath the molars
• The inferior alveolar neurovascular bundle may lie close to dental roots
• The lingual nerve is enclosed within the canal along its entire course
• The facial artery runs through every tooth root

Q6. Why can the lingual nerve be at risk during procedures around the posterior mandibular molar region even though it does not run in the mandibular canal?

• It passes through the condylar head
• It exits through the mental foramen
• It passes close to the medial posterior mandible near the third molar region
• It lies within the maxillary sinus

Q7. What developmental event normally removes the visible midline separation between the right and left halves of the infant mandible?

• Fusion of the zygomatic arch
• Fusion at the mandibular symphysis
• Ossification of the nasal septum
• Closure of the coronal suture

Q8. Why does loss of mandibular teeth alter the shape of the alveolar part over time?

• The condylar process transforms into alveolar bone
• The mandibular canal disappears immediately
• The tooth-bearing alveolar bone resorbs after loss of teeth
• The ramus separates from the body

Q9. Why is the mandible mechanically suited for mastication?

• It lacks attachment sites for muscles of mastication
• It combines tooth support, muscle attachments, and mobile temporomandibular articulations
• It forms only a passive wall of the nasal cavity
• It is fused immovably to the cranial base

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

• It is a cranial bone containing the pituitary gland
• It forms the upper jaw and encloses the maxillary sinuses
• It is a paired immobile bone forming the orbital roof
• It integrates dentition, mastication, neurovascular passage, muscle attachment, and jaw articulation