Coronectomy (Partial Wisdom Tooth Removal)
 A coronectomy removes the crown of a lower wisdom tooth while intentionally leaving the roots in place, and our oral surgeons perform it in Pullman, WA and Lewiston, ID when the roots sit dangerously close to a major nerve.
At Oral & Facial Surgery, our board-certified oral and maxillofacial surgeons use this approach to lower the risk of nerve injury for the patients who need it.
It is not the usual way wisdom teeth come out. Most are removed completely, and you can read more about that approach under wisdom teeth removal. A coronectomy is a deliberate alternative for a specific situation, when taking the whole tooth out would put the nerve in your lower jaw at real risk.
Choosing between the two comes down to imaging and judgment, both of which our surgeons bring to every case.
On This Page
What Is a Coronectomy?
 A coronectomy, sometimes called partial wisdom tooth removal, takes off the visible crown of an impacted lower wisdom tooth and leaves the roots undisturbed in the jaw. Your surgeon then closes the gum over the site, and the roots stay safely below the surface.
The reason is the inferior alveolar nerve, which runs through the lower jaw and supplies feeling to the lip and chin. When a wisdom tooth’s roots wrap around or press directly against that nerve, pulling the entire tooth out can stretch or damage it. Removing only the crown avoids disturbing the roots that sit against the nerve.
This is not a first-choice procedure. Most wisdom teeth are removed completely without any concern for the nerve, and full removal remains the standard. A coronectomy is reserved for the smaller group of cases where imaging shows the roots and the nerve are too close for comfort.
Why Leave the Roots?
Leaving the roots is the entire point, not a shortcut. The roots are what sit against the nerve, so removing them is exactly what creates the risk of numbness in the lip and chin. By taking the crown and leaving the roots, your surgeon resolves the problems the tooth was causing while sidestepping the part of the procedure most likely to harm the nerve. Your surgeon trims the roots below the bone, and healthy bone usually grows over them.
Is a Coronectomy Right for You?
A coronectomy is considered only in specific circumstances. It tends to be appropriate when:
- The tooth is a lower wisdom tooth – the nerve in question runs through the lower jaw, so this does not apply to upper teeth.
- Imaging shows the roots against the nerve – a cone beam CT scan reveals the roots wrapping around or touching the nerve canal.
- The tooth needs to be addressed – it is causing pain, infection, or other trouble that makes leaving it whole a poor option.
- The roots are healthy and stable – active infection in the roots or loose roots usually means full removal is the better path.
If imaging shows the nerve is a safe distance away, complete wisdom teeth removal is the simpler and more predictable choice.
Your Oral Surgeons
A coronectomy calls for precise imaging and steady judgment, because the decision and the surgery both hinge on millimeters near the nerve. Both of our doctors are board-certified oral and maxillofacial surgeons who plan these cases with three-dimensional imaging before touching the tooth.
Dr. Stephen W. Holm is a Diplomate of the American Board of Oral and Maxillofacial Surgery and served as chief resident during his residency at Carle Foundation Hospital, with more on Dr. Holm’s bio. Dr. Sherdon W. Cordova completed his oral and maxillofacial surgery residency at the same hospital and served as an oral and maxillofacial surgeon in the United States Air Force, with more on Dr. Cordova’s bio.
Using a cone beam CT scan, your surgeon maps exactly how the roots relate to the nerve canal, which is what makes the call between a coronectomy and full removal a measured decision rather than a guess.
The Coronectomy Process
A coronectomy follows a careful sequence built around protecting the nerve.
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3D nerve assessment – your surgeon studies a cone beam CT scan to confirm how close the roots sit to the nerve and whether a coronectomy is the safer choice.
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Numbing and sedation – we fully numb the area, and IV sedation is available if you would rather be relaxed for the surgery.
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Removing the crown – your surgeon separates and removes the crown of the tooth while leaving the roots in place.
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Trimming the roots – your surgeon reduces the roots to a few millimeters below the bone so the gum and bone can heal over them.
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Closing the site – we close the gum over the area, and it heals much like a standard tooth extraction site.
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Healing and follow-up – you heal over the next couple of weeks, and we check the site to confirm everything is settling as expected. |
Recovery is usually comparable to a routine extraction, and we send you home with specific aftercare instructions.
The Benefits of a Coronectomy
 The main benefit is a lower risk of nerve injury. Because we map the exact relationship between the roots and the nerve with a cone beam CT scan first, a coronectomy lets your surgeon remove the troublesome crown while leaving the roots against the nerve undisturbed, which is the part of a full extraction most likely to cause lasting numbness.
It still resolves the problem the tooth was causing. The pain, repeated gum infections, and pressure on neighboring teeth come from the crown and its position, which your surgeon confirms on your scan, so removing the crown addresses the symptoms even though the roots stay.
The approach is also conservative with the surrounding bone. Rather than forcing roots out from around the nerve and removing extra bone to do it, a coronectomy preserves more of the jaw structure, which tends to mean a smoother recovery.
Why Choose Our Surgeons for a Coronectomy
The most important part of a coronectomy is knowing when to do one, and that is where a board-certified oral and maxillofacial surgeon reading a cone beam CT scan makes the difference. Our surgeons recommend this approach only when the imaging genuinely supports it, and full removal when it does not.
Experience backs that judgment. With more than fifty thousand wisdom teeth removed and more than forty years of combined experience, our surgeons know what root-to-nerve relationships look like across a wide range of cases, and the same surgeon who plans your procedure performs it.
Coronectomy Cost and Insurance
Cost matters, and we want to be straight with you about it. What you pay for a coronectomy depends on the complexity of the tooth, the imaging involved, and whether you choose sedation, so an in-person evaluation gives the most accurate estimate.
Because a coronectomy is a medically necessary surgical procedure, dental insurance often covers part of it, though every plan differs. You can review the details of your insurance and financing options, and our team will confirm your benefits and explain the payment options available for qualifying patients.
Schedule Your Consultation
Have a wisdom tooth your dentist is concerned about? Call our Lewiston, ID office at 208-743-1640 or our Pullman, WA office at 509-330-5020 to schedule an evaluation. You can also request an appointment online anytime. Our Lewiston office is at 444 Thain Rd, Lewiston, ID 83501. Our Pullman office is at 1256 Bishop Blvd Suite I, Pullman, WA 99163. For questions before you book, our Contact page is the quickest way to reach us.
Frequently Asked Questions
Why would I leave the roots instead of removing the whole tooth?
Because for the small number of teeth where the roots sit against the nerve, pulling those roots is what risks lip and chin numbness. Most wisdom teeth come out whole through complete wisdom teeth removal, so a coronectomy is the exception we choose only when imaging shows that close contact.
Is it safe to leave roots in the jaw?
Yes, when the roots are healthy and an experienced surgeon performs the procedure. Retained roots usually stay stable and symptom-free, and we follow up to confirm the site heals well. The main concern would be a root that is already infected, which is exactly what we rule out before recommending a coronectomy.
Will the leftover roots cause problems later?
Usually not, but it is the main thing we watch for. In a small number of cases the roots slowly migrate upward over time, away from the nerve, and only occasionally does that call for a simple second procedure to remove them, often at much lower risk once they have moved.
How do you decide between a coronectomy and full removal?
The cone beam CT scan is the deciding factor. If it shows the roots wrapped around or touching the nerve canal, a coronectomy lowers the risk. If the nerve sits a safe distance away, full removal is simpler and more predictable, and that is what we recommend.
Does a coronectomy hurt?
No. We fully numb the area first, and IV sedation is available if you would prefer to be more relaxed. Most patients feel only pressure during the procedure, and the soreness afterward is similar to a routine extraction.
Can a coronectomy completely prevent nerve damage?
No procedure can promise that, but a coronectomy meaningfully lowers the risk compared with removing roots that sit against the nerve. That is the whole reason we choose it in these cases, and the cone beam CT planning is what lets us make that judgment accurately.
How long is recovery?
Recovery is comparable to a standard extraction. Most patients are back to normal within a few days to a couple of weeks, with swelling and soreness easing over the first several days. We give you aftercare instructions and check the site as it heals.
Does insurance cover a coronectomy?
Often in part, since it is a medically necessary surgery, though plans differ on how they handle the imaging and sedation. We confirm exactly what yours covers before treatment and can give you an estimate, and our insurance and financing options outline payment plans if you need them. |
