An exostosis is a benign bony growth that develops on the outer surface of the jawbone. In the mouth, buccal exostoses appear as hard, immovable bumps along the outside of the upper or lower jaw, most commonly in the premolar and molar areas. They are composed of normal, dense bone and are not tumors, infections, or anything malignant. They are a natural anatomical variation that becomes clinically significant only when they interfere with function or prosthetics.

The term “exostosis” refers to bony growths on the buccal (cheek-side) surfaces of the jaws. “Torus palatinus” refers specifically to a bony growth on the midline of the hard palate, and “torus mandibularis” refers to bony growths on the lingual (tongue-side) surface of the mandible. All are the same type of tissue — benign bony overgrowth — but they are named by their location. The surgical approach differs based on location due to varying anatomy and tissue characteristics.

The exact cause is not fully understood, but the most accepted explanation involves a combination of genetic predisposition and functional stress on the jawbone. People who grind or clench their teeth (bruxism) are more likely to develop tori and exostoses because the repeated mechanical forces stimulate the periosteum to deposit additional bone. There is also a strong hereditary component, with these growths running in families and varying in prevalence across different ethnic populations.

Removal is recommended when the bony growth interferes with the fabrication or fit of a denture or partial denture, causes recurrent ulceration or sore spots on the thin overlying mucosa, makes oral hygiene difficult, interferes with speech, or causes significant anxiety or discomfort for the patient. If the exostosis or torus is asymptomatic and does not interfere with any dental treatment, it can be safely left alone and simply monitored.

The procedure is performed under local anesthesia so you feel no pain during surgery. Post-operative discomfort varies by location: buccal exostosis removal tends to produce moderate swelling and mild discomfort, while palatal torus removal can cause more significant swelling of the palate that makes eating uncomfortable for several days. Prescribed anti-inflammatory medication and a soft diet manage post-operative discomfort effectively. IV sedation is available for patients who prefer it.

Regrowth is uncommon but possible, especially if the underlying cause (bruxism or clenching) continues. If the bone was completely reduced to the level of the surrounding ridge, any regrowth is typically slow and minor. Wearing a nightguard after surgery can help reduce the functional forces that contributed to the original growth and minimize the chance of recurrence.

The length of the procedure depends on the number, size, and location of the bony growths being removed. A single buccal exostosis may take 20 to 30 minutes. A large palatal torus can take 30 to 45 minutes. If multiple exostoses and tori are being removed in the same session under sedation, the total surgical time may be 45 to 90 minutes. We provide a time estimate during your consultation.

No. A palatal torus is a completely benign growth of normal bone. It is not a tumor, not pre-cancerous, and carries no health risk. Many people have a palatal torus and never need treatment for it. The only reasons to remove it are functional: it interferes with a denture, causes frequent ulceration from food trauma, affects speech, or makes the patient uncomfortable.

We typically wait four to six weeks after torus or exostosis removal before taking final denture impressions. This allows the soft tissue to fully heal, the swelling to completely resolve, and the tissue contour to stabilize. Taking impressions too early may result in a denture that does not fit properly once the final healing is complete. If you already have a denture, it may need to be relined or adjusted during the healing period.

Some general dentists perform minor exostosis removal, but many refer to an oral surgeon, particularly for palatal torus removal (due to proximity to the greater palatine artery) and larger mandibular tori (due to lingual nerve proximity). A specialist has the surgical training, instrumentation, and experience to manage these anatomical considerations safely and to offer IV sedation when multiple sites need treatment in one visit.

After surgery, the area feels flat and smooth where the bony prominence once was. During the first few weeks, the tissue may feel slightly swollen or uneven as healing progresses. Once fully healed, the area feels like normal palate, gum, or cheek tissue. Patients who had their torus removed for denture preparation are often pleased by how much more comfortable the denture seats once the bony obstruction is gone.

Many dental insurance plans cover exostosis and torus removal when it is performed for a documented clinical indication, such as denture preparation or chronic tissue trauma. Medical insurance may also provide coverage in certain situations. We verify your benefits before the procedure, submit appropriate clinical documentation, and provide you with a clear estimate of any out-of-pocket costs.

Yes. In fact, when multiple bony growths need removal — which is common in patients preparing for full dentures — we often remove all of them in a single session under IV sedation. This is more efficient for the patient and allows the entire ridge to heal simultaneously before denture fabrication begins. We discuss the pros and cons of single-session versus staged treatment during your consultation.

Bruxism (teeth grinding) and clenching generate significant forces that are transferred through the teeth into the surrounding bone. The periosteum — the membrane covering the bone — responds to this chronic mechanical stress by depositing additional bone at high-stress points, which is how exostoses and tori form and enlarge over time. Managing bruxism with a nightguard after exostosis removal can help reduce the risk of regrowth.

Hard, immovable bumps that feel like they are part of the bone itself are most likely exostoses or tori, which are completely benign. They are among the most common bony variations in the oral cavity. However, any new growth in the mouth should be evaluated by a qualified provider to confirm the diagnosis. A clinical examination and, if needed, imaging can quickly distinguish benign bony overgrowth from other conditions. Call us at (503) 822-0096 if you would like an evaluation.