- Most bone spurs are a fragment working its way out after an extraction.
- Those usually surface within weeks and come out on their own.
- A hard lump you have always had is a torus, and it is harmless.
- Never pull at a fragment that is still attached.
- Exposed bone that persists past eight weeks needs assessing.
- That matters most if you take bone medication for osteoporosis or cancer.
- A dentist can lift a loose fragment out in minutes.
What a bone spur in the gum is
The clinical name is a sequestrum: a piece of dead bone separating from healthy bone and migrating out through the gum.
After an extraction the socket remodels. Small fragments of the thin bone that held the root can lose their blood supply during that process. Your body treats them as foreign and pushes them out.
That is a normal part of healing rather than a complication. It is your jaw finishing the job.
Three different things with the same nickname
| What you have | How it behaves | What happens next |
|---|---|---|
| A sequestrum after an extraction | Sharp point appears weeks after the tooth came out, sore, sometimes with a small ulcer | Surfaces and comes out, or a dentist lifts it out |
| A torus or exostosis | Smooth hard lump you have had for years, painless, often symmetrical on both sides | Nothing. Harmless bone, only removed if a denture needs the space |
| Exposed bone that will not heal | Bare bone visible for more than eight weeks, usually painful | Needs assessing, particularly with certain medications |
Telling them apart is mostly a question of time. Something that appeared after a recent extraction is the first. Something that has always been there is the second. Bare bone that has been visible for two months is the third.
Dr. Joyce Kahng:
"The question I ask first is how long it has been there. A week after an extraction, that's your body evicting a bone chip and it's fine. Something you can feel with your tongue that you remember from ten years ago is a torus, and I'll leave it alone. Bone showing through for two months is a different conversation."
Bone fragments after an extraction
Most people meet this two to six weeks after a tooth comes out, which is late enough that they assume something has gone wrong.
What it feels like:
- A sharp or gritty point against the tongue or cheek
- Localized soreness that had settled and came back
- A small ulcer where the fragment is pushing through
- Occasionally a piece that works loose and comes out while eating
Wisdom teeth and molars produce them more often, because the bone around those roots is thinner and more of it is disturbed.
It also happens without any extraction at all. A 2020 case series in the British Journal of Oral and Maxillofacial Surgery described spontaneous ulceration with bone sequestration, most often over the mylohyoid ridge on the inside of the lower jaw. Six patients, all men aged 49 to 65, with lesions present for six to twelve weeks. Healing happened in every case, and faster when the loose fragment was removed.
That ridge is thinly covered, so a knock from a crisp or a toothbrush is enough to start it.
What to do about one
Leave it alone if it is still attached. Pulling at a fragment that has not separated tears gum and slows the whole process.
- Rinse with warm salt water a few times a day, particularly after meals. It soothes the tissue and helps keep the area clean, and salt water does not kill the bacteria so it is not doing more than that.
- Cover it with dental wax if it is cutting your tongue.
- Chew on the other side.
- Take ibuprofen or acetaminophen if it is sore, following the label.
- Let a loose piece come out on its own if it is already mobile.
If it is genuinely loose, a dentist can lift it out with tweezers, usually without anaesthetic and in under a minute. That is often the fastest route to comfort.
Dr. Kahng: "People wait months on these because they feel silly calling about a splinter. It takes me longer to write the note than to remove it."
Exposed bone that will not heal
This is the part of the topic that matters, and almost nothing written about bone spurs mentions it.
Bone that stays visible in the mouth for more than eight weeks is not normal healing.
Eight weeks is the diagnostic threshold used for medication-related osteonecrosis of the jaw. The definition requires current or previous treatment with an antiresorptive or antiangiogenic drug. Plus exposed bone that has persisted for longer than eight weeks, with no history of radiation to the jaws.
The medications that carry the risk:
- Bisphosphonates, including alendronate, risedronate and zoledronic acid
- Denosumab
- Antiangiogenic cancer drugs such as bevacizumab, sunitinib and everolimus
The risk levels are very different depending on why you take them. For people on oral bisphosphonates for osteoporosis, the risk after a tooth extraction is around 0.5%. For cancer patients on high-dose intravenous bisphosphonates, reported risk after extraction reaches 14.8%.
Most people reading this page take none of these drugs and have a bone chip that will be gone in a fortnight. If you do take one of them, tell your dentist before any extraction, and get exposed bone looked at rather than waiting it out.
When to call a dentist
Book an appointment if:
- The fragment is loose and you want it out
- It has been more than eight weeks and bone is still visible
- The area is increasingly painful, swollen or producing pus
- You take, or have taken, bone or cancer medication from the list above
- Numbness develops in your lip or chin
- A gum swollen around one tooth appears alongside it
Same-day care for spreading facial swelling, fever, or difficulty swallowing.
Sources
- Lidhar A, Ethunandan A, Ethunandan M. Spontaneous oral ulceration with bone sequestration. British Journal of Oral and Maxillofacial Surgery, 2020: https://pubmed.ncbi.nlm.nih.gov/32651016/
- Thomas T, et al. Medication-related osteonecrosis of the jaw: a narrative review of risk factors, diagnosis, and management. Frontiers of Oral and Maxillofacial Medicine: https://fomm.amegroups.org/article/view/63019/html
- American Dental Association, Osteoporosis Medications and Medication-Related Osteonecrosis of the Jaw: https://www.ada.org/resources/ada-library/oral-health-topics/osteoporosis-medications
FAQ
How long does a bone spur in the gum take to come out?
Usually two to six weeks after an extraction, sometimes longer. A spontaneous one can take six to twelve weeks. Removing a loose fragment speeds healing rather than slowing it.
Should I pull out a bone fragment in my gum?
Not if it is still attached. Pulling tears the gum and delays healing. If it is already loose, a dentist can lift it out in seconds, which is safer and faster.
Is a bone spur in the gum serious?
Rarely. Most are a normal part of healing after an extraction. Exposed bone still visible after eight weeks is the exception and needs assessing, especially in anyone taking bone medication for osteoporosis or cancer.
Why do I have a hard lump in my gum that never changes?
A lump that has been there for years, is smooth, painless and often mirrored on the other side, is usually a torus or exostosis. It is normal bone and it needs no treatment unless a denture has to sit over it.
Can a bone spur happen without an extraction?
Yes. Spontaneous bone sequestration happens most often over the mylohyoid ridge inside the lower jaw, where the bone is thinly covered and easily injured.
Does a bone spur mean the extraction went wrong?
No. Fragments are a common part of socket remodelling, and they are more likely after molars and wisdom teeth because the surrounding bone is thinner.
Bera edits this library at 1flowww: the question each article answers, the sources it cites, and the update history that shows what changed. Every clinical claim is reviewed by Dr. Kahng before it publishes. About the editor
Dr. Joyce Kahng is a cosmetic dentist, veneer expert, and the founder of Orange + Magnolia Dental Studio in Costa Mesa, CA. With 16+ years in practice and a following of 1.5M+ across Instagram, TikTok, and YouTube, she's known for making dentistry actually make sense. She's been featured in Forbes, Vogue, Allure, Glamour and GQ, and is the creator of the VeneerLIFT™.
Our editorial process · written by the editorial team, medically reviewed by a dentist, corrected in the open.
- 15 Nov 2024 Published. Clinical review by Dr. Joyce Kahng, DDS.
Is something here out of date?
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