Why Does a Denture Become Loose or Move?

Dentures moving inside the mouth over time, shifting while speaking, or feeling as though they may come loose while eating are common problems experienced by denture wearers. A denture that initially fits comfortably and securely may become loose over time. This does not always mean that there is a problem with the denture itself.

Changes in the jaw and oral structures over time, changes in the tissues supporting the denture, wear of the denture’s retentive components, or a gradual loss of fit between the denture and the mouth can all cause a denture to move.

What Are the Most Common Reasons a Denture Moves?

1. Changes in the Jawbone Over Time

After teeth are lost, the jawbone that once supported the teeth can gradually lose volume. This is particularly important with removable dentures, as these changes can affect the fit of a denture over time.

While the denture itself may maintain its original shape, the supporting tissues underneath it can change. This may create a gap between the denture and the underlying tissues. As a result, the denture may start to move while speaking, smiling, or eating.

2. The Denture Gradually Loses Its Fit

Over time, dentures can lose some of their fit with the oral tissues. This is particularly common with dentures that have been used for many years.

Changes in the tissues beneath the denture can reduce its stability and retention. In such cases, the denture may not be broken or damaged, but it may no longer remain as secure as it once did.

3. Loose Clasps on Removable Partial Dentures

In removable partial dentures, clasps are used to obtain support and retention from the natural teeth. Over time, these clasps may become loose or lose some of their effectiveness due to regular use.

When the clasps no longer provide sufficient retention, the stability of the denture may decrease. This can cause the denture to move, particularly while chewing.

4. Problems With the Teeth Supporting the Denture

The health of the natural teeth supporting a removable partial denture is also very important. If these teeth develop problems such as decay, wear, or mobility, the retention and stability of the denture may be affected.

For this reason, regular dental check-ups should evaluate not only the denture itself but also the natural teeth and gums that support it.

5. A Broken or Deformed Denture

Dropping a denture, eating very hard foods, or exposing it to excessive force can cause cracks, fractures, or changes in its shape. Even a small change in the structure of a denture can affect how well it fits in the mouth.

If you notice a crack, fracture, or change in the shape of your denture, you should consult your dentist rather than attempting to repair or adjust it yourself at home.

6. Teeth Grinding and Clenching

Teeth grinding and clenching can place excessive forces on the teeth and jaw. These forces may also negatively affect the stability and durability of a denture.

If symptoms such as morning jaw pain, headaches, or excessive tooth wear accompany your denture problems, it is important to inform your dentist.

Why Can a New Denture Move?

New dentures may also require an adjustment period. This is particularly important after tooth extractions, as the tissues inside the mouth continue to heal and change during the recovery process.

If a denture is made immediately after tooth extraction, its fit may change as the healing process progresses. This can result in looseness or movement.

In such cases, the denture should be reassessed by a dentist. Depending on the situation, relining or other adjustments may be necessary to improve its fit.

What Should You Do If Your Denture Is Moving?

If your denture was previously comfortable and stable but has recently started to move, the first step is to determine the underlying cause.

Your dentist may evaluate:

• The fit of the denture within your mouth
• The condition of the jaw and supporting tissues
• The natural teeth supporting the denture
• The clasps or other retentive components
• Any cracks, fractures, or deformation of the denture
• Your bite and chewing relationship

In some cases, adjusting the fit of the denture may be sufficient. Depending on the cause, however, treatment may involve relining the denture, replacing retentive components, or making a new denture.

Can You Glue a Denture at Home?

Using glue, adhesives, or other materials at home to permanently fix a loose denture is not recommended.

You should also avoid cutting, bending, or modifying the denture yourself, as this may damage its structure and further compromise its fit in the mouth.

Any problems with a denture should be evaluated by a dental professional.

Why Are Regular Denture Check-Ups Important?

A denture is not simply an appliance that is placed in the mouth and used indefinitely. The oral tissues, natural teeth, and dentures can all change over time.

For this reason, regular dental check-ups are important for denture wearers. You should particularly consult your dentist if your denture no longer feels as comfortable as before, moves while eating, affects your speech, or causes sores or irritation in your mouth.

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Remember: A denture that moves is not only a comfort issue. It may also indicate that the fit and condition of the denture need to be reassessed by a dental professional.