Ever notice a hard bump on the roof of your mouth or along the inside of your lower jaw?
It may be an oral torus.
Tori are harmless areas of extra bone that develop inside the mouth. They’re usually painless, they aren’t cancerous, and in most cases they don’t require any treatment.
But when dentures are involved, they can sometimes become a problem.
What Are Oral Tori?
A torus is simply an extra growth of normal bone.
There are two common types:
Torus Palatinus
This develops along the middle of the hard palate – the roof of your mouth.
It can range from a small bump to a fairly large area of raised bone.
Mandibular Tori
These develop along the inside of the lower jaw, usually near the premolars and underneath the tongue.
They commonly occur on both sides.
In either case, the bone itself is normal. There’s just more of it than usual.
What Causes Tori?
There isn’t one clear cause.
Tori appear to be influenced by several factors, including:
- Genetics
- Jaw shape and anatomy
- Bite forces
- Clenching or grinding
- How forces are distributed through the teeth and jaws
Some people develop them when they’re younger, while others notice them becoming more prominent later in life.
Are Tori Dangerous?
Usually, no.
Most tori are:
- Benign
- Painless
- Slow growing
- Completely harmless
Many people have them for years without even realizing it.
The bigger issue is their location.
Tori are covered by a relatively thin layer of gum tissue, so there isn’t much cushioning over the bone. If that area is repeatedly rubbed or bumped, it can become sore or ulcerated.
Why Tori Matter With Dentures
This is where they become especially important.
A denture needs to sit comfortably and evenly against the tissues underneath it.
If a large torus sits underneath part of the denture, it can create a hard pressure point.
That can lead to:
- Soreness
- Irritation or ulceration
- Difficulty inserting or removing the denture
- Rocking or movement
- Difficulty getting an accurate fit
- Reduced denture stability
Simply putting more pressure over the area usually makes things worse.
Tori and Upper Dentures
A large torus on the roof of the mouth can interfere with an upper complete denture.
Upper dentures normally use a large portion of the palate for support and suction.
If a prominent torus is present, the denture may need to be relieved around it so excessive pressure isn’t placed directly on the bone.
Very large tori can sometimes make it more difficult to achieve an ideal denture design or seal.
Tori and Lower Dentures
Mandibular tori can be even more challenging.
Lower dentures already have limited space and stability compared with upper dentures.
Large tori can:
- Reduce the space available for the denture
- Interfere with the denture border
- Make insertion and removal difficult
- Create painful pressure areas
- Limit how much of the jaw can be covered for support
The larger and more pronounced the tori are, the more they can affect denture design.
Do Tori Need to Be Removed?
Usually not.
If the tori aren’t causing any problems, the best treatment is often to simply leave them alone.
Removal may be considered when they:
- Prevent a denture from fitting properly
- Repeatedly become sore or ulcerated
- Make wearing a denture uncomfortable
- Interfere with eating, speech, or other oral function
- Make it difficult to design a functional dental appliance
When necessary, tori can be surgically reduced or removed before a new denture is made.
Can Dentures Be Made Around Tori?
Often, yes.
Not every torus needs surgery.
Depending on the size, shape, and location, a denture can sometimes be designed with additional relief around the area.
The important part is recognizing the tori before treatment begins so the denture can be designed appropriately.
Bottom Line
Oral tori are simply extra areas of bone inside the mouth.
For most people, they’re completely harmless and don’t require treatment.
But for denture wearers, their size and location matter.
Large tori can create pressure points, reduce available denture space, affect stability, and make achieving a comfortable fit more difficult.
If you have a hard bump in your mouth or have been told you have tori, it doesn’t automatically mean anything needs to be done. It simply needs to be taken into account when planning your denture.