Key points in brief
- The alveolar ridge is the part of the jawbone that held your teeth. Planned smoothing of the jawbone before dentures is needed only when sharp or uneven bone gets in the denture's way and changing the shape of the denture does not help.
- The surgeon and the prosthodontist, the dentist who plans your denture, decide on the procedure together. Bone that has been removed does not grow back, so if you are thinking about implants, say so before the procedure.
- It is a short procedure done with a local anaesthetic: the surgeon exposes the bone under the gum, smooths it and stitches the gum. The impression for the new denture is usually taken after a few weeks.
- Before the procedure, tell the surgeon if you take or have taken medicines for osteoporosis, or medicines that protect the bones during cancer treatment.
- If pain or swelling is getting worse a few days after the procedure, call the practice the same day. If bleeding does not stop despite half an hour of pressure with a gauze pad, or you develop a fever, call straight away. If swelling makes it hard to swallow or breathe, call 112, the European emergency number.
Consult your case with an expert and get your treatment plan
When uneven bone under a denture causes problems
Uneven bone under a denture causes problems when the denture presses on the gum in one spot, rocks on bone that sticks out, or cannot be seated properly. A complete denture has no support from teeth, so it passes the pressure of biting through the gum to the bone of the ridge.
A denture rests best on a ridge that is smooth, rounded and as high as possible. A lower denture usually stays in place better the higher the ridge it rests on. The most common problems are:
- a sharp, thin crest of bone that hurts under the pressure of the denture;
- individual bony bumps that stick out;
- undercuts, that is, bulges in the bone that a rigid denture cannot slide over without pressing, especially when they are on both sides;
- the back end of the upper ridge, which dentists call the maxillary tuberosity (an ordinary part of the bone, not a sign of disease), if it is enlarged and takes up the space the denture needs;
- a bony lump, that is, a hard thickening of bone on the palate or under the tongue, if it lies where the denture has to fit closely.
Signs of such spots are pain in the same place after every meal, a sore spot that keeps coming back even after the denture has been adjusted, or a denture that stops against the bone when you put it in. If the denture is new, adjusting the denture itself at that spot is usually enough, during the visits while you are adapting to new dentures. Smoothing the bone is needed only when the uneven area lies exactly where the denture has to fit closely and no change to the denture can avoid it. The same is sometimes true of a bulge of bone that stops the denture from being seated.
Planned smoothing of the ridge is done on bone that has already healed, before a new denture is made. A sharp edge of bone that you feel with your tongue a few weeks after a tooth has been removed is a different matter. It usually stops bothering you as the area heals, just as pain after tooth extraction passes. If such an edge cuts your tongue, the dentist smooths it during a short visit. If your teeth are being removed now and you get a denture straight away, in the first weeks you follow the instructions for immediate dentures.
What to agree with your prosthodontist before you are referred to the surgeon
The prosthodontist designs the new denture and knows what it needs from the bone. So before you are referred to the surgeon, go over a few points with them:
- Can the denture be designed to avoid this spot without the procedure
- Which areas should the surgeon smooth, and why those ones?
- Could I have implants in the future, and will the procedure change anything about that?
- What will I wear between the procedure and collecting the new denture?
- How many visits are ahead of me, and when will the denture be ready?
Bring your current denture to the surgeon's appointment, and an X-ray if you have one. The surgeon can then see where the denture presses.
What treatment looks like from the consultation to the new denture
If smoothing the jawbone before dentures is needed, prosthetic treatment has one extra stage.
| When | What happens | What you do |
|---|---|---|
| at the consultation | the prosthodontist examines the gum with a finger and looks at your current denture and the X-ray | you bring your denture and the questions from the list above |
| before the procedure | the prosthodontist and the surgeon agree which areas to smooth and how much bone to leave | you say whether you are thinking about implants |
| the day of the procedure | local anaesthetic, smoothing of the bone, stitches | you put your current denture back in only when the surgeon allows it |
| the first few days | swelling and pain, usually moderate and worst at the start | you eat soft food and do not touch the wound |
| after about a week | check-up, removal of the stitches if they are not dissolvable | you mention anything that has worried you since the procedure |
| at around 2 weeks | in healthy non-smokers, the wound in the gum usually closes | you clean around the wound as the dentist has advised |
| after a few weeks | impression or scan for the new denture | you come at the time set at the check-up |
| the following weeks | try-ins, collecting the denture and adjustments to it | you show where the denture presses |
The gum heals faster than the bone underneath it. The bone under the denture keeps slowly changing shape for a long time, so after a while the new denture may need relining, which means adding new material to its underside.
How the prosthodontist assesses whether the procedure is needed
Preparing the bone for a denture starts with assessing whether the problem can be solved by the shape of the denture alone. The prosthodontist checks how far the edge of the denture and its base, the part that rests against the gum and the palate, need to extend. With a finger, they check whether the gum over the bone is thin and tender when pressed. On the X-ray, they look at the shape and height of the bone, and also check whether there are root fragments left in the bone, or other problems that need treating before the denture is made.
If you have worn a denture for years, the prosthodontist also checks whether the problem lies in the denture itself. It can be caused, for example, by worn denture teeth or a collapsed bite, a situation in which the jaws close nearer together than they should.
Many uneven areas can be worked around without a procedure. The prosthodontist trims the underside of the denture over bone that sticks out - so that it does not press there - shortens its edge or changes the direction in which it is put in. Not every obstacle under a denture is bone. Soft gum that moves on the crest of the ridge is a different problem, which the dentist assesses and treats separately.
The prosthodontist also asks whether you are considering an implant-supported denture. Implants need bone that is high enough and wide enough, so in that case the extent of the smoothing is planned even more carefully. The dentist may also order cone-beam CT (CBCT), a three-dimensional scan of the bone.
What smoothing the jawbone before dentures involves
Smoothing the jawbone before dentures is a short surgical procedure in which the dentist rounds off sharp areas of bone or reduces excess bone. Dentists call it alveoloplasty, meaning reshaping of the alveolar ridge.
The procedure is done with a local anaesthetic, so during it you usually feel only pressure. The surgeon makes a cut in the gum, lifts it away from the bone, smooths the bone with a small instrument, rinses the wound and stitches the gum. The procedure often covers a section of the ridge the length of several teeth.
A large maxillary tuberosity or bony bumps sticking out of the lower jaw are reduced in the same way. The aim is a smooth foundation on which the denture rests without pressing, with as little bone loss as possible. So a smoothed ridge does not have to be perfectly even.
Before planning the procedure, the surgeon asks about your health conditions and the medicines you take. Smoking and poorly controlled general conditions, such as diabetes, can slow healing, so tell the surgeon about them. Do not stop taking blood-thinning medicines (anticoagulants or antiplatelet medicines, for example aspirin for your heart) on your own - any change is decided by the doctor who prescribed them.
If you take or have taken medicines for osteoporosis, or medicines that protect the bones during cancer treatment, for example bisphosphonates or denosumab, tell the surgeon before the procedure. These medicines increase the risk of osteonecrosis of the jaw, a wound in which exposed bone does not heal for many weeks. The risk is small, but higher with the doses used in cancer treatment. In that case, dentists first check whether the procedure can be avoided, for example by changing the denture, and if it cannot, they plan it together with the doctor who manages that treatment.
After the procedure, pain is usually moderate and worst in the first few days, and swelling may last for a few days. For the first 24 hours, do not rinse your mouth vigorously. Do not smoke for at least 48 hours, and ideally for the whole of the first week. If you still have some of your own teeth, brush them gently, away from the wound. Use mouth rinses as the dentist has advised.
If pain or swelling is getting worse a few days after the procedure, call the practice the same day. If bleeding does not stop despite half an hour of pressure with a gauze pad, or you develop a fever, call straight away. If swelling makes it hard to swallow or breathe, call 112.
How to keep as much bone as possible
During the smoothing itself, the surgeon removes only what gets in the denture's way and prefers to round off a sharp edge rather than lower the whole ridge. A ridge with less height usually gives weaker support to the denture, especially the lower one. It also leaves less bone in reserve for a possible implant. Even after a tooth has simply been removed, the bone often has to be rebuilt before an implant can be placed.
The bone of the ridge shrinks after teeth are removed, fastest in the first few months. This jawbone loss after tooth loss continues under a denture that rests on the gum, although it slows down over time. Under a removable denture on four or more implants, the bone in the back part of the lower jaw may be lost more slowly than under a denture that rests only on the gum. With two implants, this advantage is not certain.
What to do before you agree to the procedure
Before you agree to having the bone smoothed, ask your prosthodontist whether changing the shape of the denture would be enough. If you are thinking about implants, say so before the dentists plan the procedure. Bone removed for the sake of a denture will not be there later for an implant, so the smoothing should cover only the areas that really get in the way.
Frequently asked questions
Can the bone be smoothed while teeth are being removed?
Yes, the surgeon often does minor smoothing of the sharp edges of the sockets, the places where the roots were, straight away when several teeth are removed, especially when a denture is fitted on the same day. Some uneven areas, however, only become visible after healing, and then the smoothing is planned separately. Studies do not show which approach protects the bone better, so the dentist chooses based on what they see in the mouth.
Does a bony lump on the palate have to be removed before a denture?
It does not always have to be removed. A bony lump on the palate or under the tongue, which dentists call a torus, is a harmless thickening of bone that many people have all their lives. It is removed when it lies where the denture has to fit closely or where its edge ends, and the prosthodontist cannot work around it. Sometimes trimming the underside of the denture at that spot is enough.
Can implants still be placed after the ridge has been smoothed?
After the ridge has been smoothed, implants are usually still possible if enough bone is left, but every such procedure reduces the bone reserve. When there is not enough bone, it sometimes has to be rebuilt before an implant, which is why plans for implants are discussed before the smoothing. With some implant-supported dentures, the surgeon deliberately lowers the bone while placing the implants to make room for the denture, and then the two procedures are combined into one.
Can I wear my current denture after the procedure?
Your current denture often has to be adjusted first or relined with a soft material, because it may no longer fit the reshaped bone and could press on the healing wound. The surgeon decides after the procedure whether you can put it in straight away. Do not put it in without their approval, even if it feels comfortable.
When can the impression for the denture be taken after the ridge has been smoothed?
After healed bone has been smoothed, the impression or scan is usually taken after a few weeks, when the gum has healed, is not swollen and does not hurt when pressed. Taken earlier, it would capture the swelling, and a denture made on such a model would soon stop fitting. If the bone was smoothed while teeth were being removed, the wait for the new denture is longer. The dentist sets the date at the check-up, after looking at the gum.
How does the gum heal in the first two weeks after the procedure?
In the first few days the gum is swollen and sore. Eat soft food then, and do not touch the wound with your tongue or finger. The pain usually eases after the first few days. In healthy non-smokers, the wound usually closes after about 2 weeks. If pain or swelling is getting worse after a few days, call the practice the same day. If bleeding does not stop despite half an hour of pressure with a gauze pad, or you develop a fever, call straight away. If swelling makes it hard to swallow or breathe, call 112.
Read more:
- Prosthetics Warsaw
- Complete dentures — why the upper one sometimes holds better than the lower, and what can be done
- New dentures hurt — what's normal in the first few weeks and what isn't
- Jawbone loss after tooth loss — what happens and why time matters
- Implant-supported denture (overdenture) – who is this solution for
Content and liability disclaimer
This article is informational and educational in nature and does not constitute medical advice, a diagnosis or a therapeutic recommendation — it does not replace a consultation with a specialist. If you are experiencing symptoms, have doubts or are facing a decision about treatment, consult a dentist. The methods described and the data cited are general in nature. The results of scientific studies relate to populations, not to an individual patient. The course and outcome of therapy depend on the individual clinical situation and may vary between patients. No information contained in this article constitutes a guarantee of result. The content has been prepared with due care, based on publicly available medical knowledge and the scientific publications indicated in the Sources section. We do not advise taking or refraining from any health-related action solely on the basis of the content of this article, without prior consultation with a doctor.
Sources
Source 1
Links https://doi.org/10.1111/jcpe.13390 │ https://pubmed.ncbi.nlm.nih.gov/33067890/
Description Couso-Queiruga E, Stuhr S, Tattan M, Chambrone L, Avila-Ortiz G. „Post-extraction dimensional changes: A systematic review and meta-analysis.” Journal of Clinical Periodontology. 2021;48(1):126-144.
Source 2
Links https://doi.org/10.1111/jcpe.70069 │ https://pubmed.ncbi.nlm.nih.gov/41319178/ │ https://pmc.ncbi.nlm.nih.gov/articles/PMC12890456/
Description Couso-Queiruga E, Padial-Molina M, Galindo-Moreno P, Garaicoa-Pazmino C, Oliveira-Santos N, Troiano G, Chappuis V, Avila-Ortiz G. „Effect of Alveolar Process and Basal Bone Features on Post-Extraction Dimensional Changes.” Journal of Clinical Periodontology. 2026;53(3):384-393.
Source 3
Links https://doi.org/10.1016/j.prosdent.2021.02.013 │ https://pubmed.ncbi.nlm.nih.gov/33840514/
Description Rignon-Bret C, Wulfman C, Valet F, Hadida A, Nguyen TH, Aidan A, Naveau A. „Radiographic evaluation of a bone substitute material in alveolar ridge preservation for maxillary removable immediate dentures: A randomized controlled trial.” The Journal of Prosthetic Dentistry. 2022;128(5):928-935.
Source 4
Links https://doi.org/10.1111/cid.12976 │ https://pubmed.ncbi.nlm.nih.gov/33592676/
Description Xia Y, Ma C, Chen J, Witter DJ, Zhang Q, Creugers NHJ. „Mandibular residual ridge morphology in relation to complete dentures and implant overdentures-Part I: Predictors for perceived conventional denture stability.” Clinical Implant Dentistry and Related Research. 2021;23(1):131-139.
Source 5
Links https://doi.org/10.1590/1678-7757-2020-0092 │ https://pubmed.ncbi.nlm.nih.gov/33111881/ │ https://pmc.ncbi.nlm.nih.gov/articles/PMC9648969/
Description Policastro VB, Cassiano AFB, Silva MDDD, Viotto HEDC, Leite ARP, Marin DOM, Pero AC. „Influence of the height of the mandibular ridge on the masticatory function during the functional adaptation with new complete dentures.” Journal of Applied Oral Science. 2020;28:e20200092.
Source 6
Links https://doi.org/10.1186/s12903-025-05467-8 │ https://pubmed.ncbi.nlm.nih.gov/39828672/ │ https://pmc.ncbi.nlm.nih.gov/articles/PMC11743033/
Description Sokolowski A, Huber S, Arefnia B, Pichler A, Lorenzoni M, Sokolowski A. „The influence of prosthetic treatments and implant-supported prostheses on posterior mandibular ridge atrophy: a retrospective cohort study.” BMC Oral Health. 2025;25(1):100.
Source 7
Links https://doi.org/10.1186/s12903-025-06478-1 │ https://pubmed.ncbi.nlm.nih.gov/40604873/ │ https://pmc.ncbi.nlm.nih.gov/articles/PMC12217797/
Description Çiftçi Şişman A, Beker RC, Kiziltan Eliaçik BB. „Assessment of the relationship between sense of coherence and surgery-related oral wound healing by using a contemporary scale: a prospective cohort study.” BMC Oral Health. 2025;25(1):988.
Source 8
Links https://doi.org/10.1016/j.joms.2025.04.016 │ https://pubmed.ncbi.nlm.nih.gov/40381651/
Description Buschman JA. „Alveoloplasty: A Paradigm Shift to a More Efficient Surgical Technique.” Journal of Oral and Maxillofacial Surgery. 2025;83(8):996-999.
Source 9
Links https://doi.org/10.1016/j.joms.2022.02.008 │ https://pubmed.ncbi.nlm.nih.gov/35300956/
Description Ruggiero SL, Dodson TB, Aghaloo T, Carlson ER, Ward BB, Kademani D. „American Association of Oral and Maxillofacial Surgeons’ Position Paper on Medication-Related Osteonecrosis of the Jaws-2022 Update.” Journal of Oral and Maxillofacial Surgery. 2022;80(5):920-943.