Tooth Extractions and Nerve Damage: Risk Guide

Can a Tooth Extraction Cause Nerve Damage?

Yes, but it is uncommon. The nerves that supply feeling to the lip, chin, and tongue run close to the roots of the lower back teeth, especially the wisdom teeth, and in rare cases an extraction can bruise, stretch, or, very rarely, sever one of these nerves. Studies on lower wisdom teeth removal put the risk of temporary altered sensation at roughly 1 to 5 percent of cases, with permanent nerve injury occurring in well under 1 percent when the procedure is performed by an experienced oral surgeon.

In nearly every case, the benefit of removing a decayed, impacted, or otherwise problematic tooth far outweighs this small risk, and modern imaging lets your surgeon see exactly where the nerve runs before ever making an incision. This page explains which nerves are involved, what increases the risk, and what recovery looks like if a nerve is affected.

Which Nerves Are at Risk During an Extraction

Two nerves are most commonly discussed in relation to tooth extraction:

The inferior alveolar nerve runs through a canal inside the lower jawbone, directly beneath the roots of the lower molars, and supplies feeling to the lower lip and chin.
The lingual nerve runs along the inner surface of the lower jaw, close to the gum tissue on the tongue side, and supplies feeling and taste to the front two-thirds of the tongue.

Because lower wisdom teeth sit closest to both nerves, they account for the large majority of extraction-related nerve concerns compared to extractions elsewhere in the mouth.

What Increases the Risk of Nerve Injury

Certain factors raise the likelihood that a nerve will be close enough to an extraction site to be affected:

Age at extraction. Wisdom tooth roots continue lengthening and curving as a patient ages, which is why many surgeons recommend removal before age 25, when roots are shorter and less likely to be intertwined with the nerve canal.
Deep impaction. Teeth trapped fully beneath bone are more likely to sit directly against or wrap around the nerve.
Root shape and proximity on imaging. A pre-operative scan showing the roots crossing directly over the nerve canal signals a higher, though still manageable, risk.
Surgeon experience and technique. Careful surgical planning and technique meaningfully reduce risk even in higher-risk anatomy.

Symptoms of Nerve Involvement

If a nerve is bruised or stretched during an extraction, patients typically notice:

Numbness or a tingling, "pins and needles" sensation in the lip, chin, or tongue
A feeling of fullness or heaviness in the affected area
Altered taste sensation, if the lingual nerve is involved
Little to no pain in the numb area itself, since the nerve that transmits pain is the same one that is affected

This condition is called paresthesia. Most cases involve a bruised or stretched nerve, which behaves much like a bruise anywhere else in the body and heals with time.

Recovery Timeline for Nerve-Related Numbness

Recovery depends on the type of nerve injury:

Mild bruising: Sensation often returns within days to a few weeks
Moderate stretching: Improvement is usually seen over 1 to 3 months as the nerve sheath heals
Beyond 3 to 6 months: If numbness persists this long without improvement, the nerve fibers were likely damaged more significantly, and a specialist evaluation may be recommended
True nerve transection (cutting): This is rare and, unlike bruising, does not heal on its own without surgical nerve repair

As a general rule, if numbness continues unchanged for a full month after extraction, it is reasonable to schedule a follow-up so your surgeon can assess whether the change is likely to be permanent.

How Dr. Haigney Minimizes This Risk

Before any extraction where the nerve is a consideration, particularly with impacted wisdom teeth, Dr. Haigney reviews 3D imaging to map the exact position of the nerve relative to the tooth roots. In select higher-risk cases, a modified technique such as coronectomy, removing the crown of the tooth while leaving a small root fragment away from the nerve, may be recommended instead of full extraction to avoid disturbing the nerve at all.

Related Conditions and Why Early Extraction Matters

Because nerve proximity worsens as wisdom teeth roots mature, timing matters. Impacted teeth left in place also carry ongoing risk of decay, infection, and crowding, since their position at the back of the mouth makes them difficult to clean. For most patients, extracting wisdom teeth in the late teens or early twenties, before roots fully form, offers the best combination of an easier procedure and the lowest nerve-related risk. Broader questions about extraction safety are covered on our oral surgery services page.

Schedule a Consultation

If you are weighing wisdom tooth or other extractions and want a clear picture of your personal nerve-injury risk based on your own anatomy, Dr. Raymond J. Haigney II, FACS can review your imaging and walk you through your options. Call Lake Norman Oral & Facial Surgery in Huntersville at (704) 987-3132 or request an appointment online.

Related Article: Extraction of Infected Teeth

TOOTH EXTRACTIONS AND NERVE DAMAGE