What is the lowest cervical vertebra that can cause tooth pain?

What is the lowest cervical vertebra that can cause tooth pain?

• A. C3
• B. C4
• C. C5
• D. C6

Answer: (C)

Referred dental pain from the neck happens because sensory input from the upper cervical segments can converge with trigeminal (face/teeth) pathways in the brainstem. The brain may interpret that convergence as tooth pain even though the source is cervical in origin. Among the upper cervical levels, the lowest one capable of producing this dental referral is C5. Levels below C5 (like C6 and lower) tend to refer pain to the neck, shoulder, or arm rather than to the teeth. So C5 is the lowest cervical vertebra that can cause tooth pain in this context. If toothache occurs with neck involvement or there’s suspicion of cervical radiculopathy, consider C5 as a potential source.

Referred dental pain from the neck happens because sensory input from the upper cervical segments can converge with trigeminal (face/teeth) pathways in the brainstem. The brain may interpret that convergence as tooth pain even though the source is cervical in origin.

Among the upper cervical levels, the lowest one capable of producing this dental referral is C5. Levels below C5 (like C6 and lower) tend to refer pain to the neck, shoulder, or arm rather than to the teeth. So C5 is the lowest cervical vertebra that can cause tooth pain in this context. If toothache occurs with neck involvement or there’s suspicion of cervical radiculopathy, consider C5 as a potential source.