Can Wearing an Old, Flat Denture Cause Your Chin to Look Closer to Your Nose Over Time?

Many denture wearers notice gradual changes in how their face looks over the years — and understandably, this can be a source of concern. You may have looked in the mirror and noticed that your chin appears to sit higher, or that the lower half of your face seems to have shortened. This is a question dentists in London hear with increasing regularity, and it is one that deserves a clear, honest answer.

When a denture becomes worn, flat, or ill-fitting, it can reduce what dentists refer to as the vertical dimension of occlusion — in simple terms, the natural height that your teeth provide when your mouth is at rest or gently closed. This reduced facial height can cause the chin to appear closer to the nose, creating a more "collapsed" facial profile over time.

This article explains the dental science behind this change, what signs to look out for, and when speaking with a dental professional may be beneficial. If you have been wearing the same denture for several years, this information may be particularly relevant to you.

What Is Vertical Dimension, and Why Does It Matter?

To understand why an old denture may affect your facial appearance, it helps to understand the concept of vertical dimension. In dentistry, vertical dimension of occlusion (VDO) refers to the measured height of the face when the upper and lower teeth — or in this case, denture teeth — are brought into contact.

Natural teeth, even as they wear slightly over decades, generally maintain adequate facial height through a combination of tooth structure and the jaw's adaptive positioning. When you wear a complete denture, however, the artificial teeth carry the full responsibility for maintaining this height.

Over time — typically five to ten years, sometimes sooner — the acrylic teeth on a denture flatten through everyday use. Chewing, grinding, and general wear gradually reduce the height of those teeth. As this happens, the space between the upper and lower jaws when the mouth is closed decreases. The jaw effectively over-closes, and this reduction in facial height is often visible externally, with the chin appearing to move closer to the nose.

This is not merely a cosmetic issue. Reduced vertical dimension can also contribute to jaw discomfort, difficulty chewing efficiently, and changes in how the denture fits and functions.

Featured Snippet Answer

Can wearing an old, flat denture cause your chin to look closer to your nose?

Yes. As denture teeth wear flat over time, they lose height, reducing the vertical dimension of occlusion — the natural space your teeth create between your upper and lower jaws. This can cause the chin to appear closer to the nose, resulting in a visibly shortened lower face. Replacing an old denture may help restore this facial proportion.

How Bone Loss Beneath a Denture Contributes to Facial Changes

Beyond tooth wear on the denture itself, there is another significant factor at play: bone resorption. When natural teeth are lost, the jawbone that once supported those roots gradually begins to resorb — meaning it reduces in volume over time. This is a natural biological process that continues throughout life for denture wearers.

As the underlying bone changes shape and reduces in height, a denture that once fitted well becomes progressively looser. The denture may begin to sit lower or higher than intended, altering the jaw's resting position and further reducing the vertical dimension of the face.

This combination of worn denture teeth and bone resorption underneath is a key reason why denture wearers may notice their chin appearing to sit closer to their nose, sometimes becoming more pronounced as years pass. The face may also appear to develop deeper lines around the corners of the mouth, sometimes referred to as angular cheilitis, as a result of the over-closed jaw position.

Understanding that bone resorption is a gradual, ongoing process helps explain why regular dental reviews remain important for denture wearers — even if the denture seems to be functioning well on a day-to-day basis.

Signs That Your Denture May No Longer Be Providing Adequate Support

It is not always easy to recognise changes in your own facial appearance, particularly when they develop gradually. There are, however, several signs that may suggest your denture is no longer maintaining adequate vertical dimension:

• Your chin appears noticeably closer to your nose when your mouth is relaxed or closed
• Deeper lines or folds have developed around the corners of your mouth
• Your denture feels loose or unstable, particularly when speaking or chewing
• Jaw discomfort or facial muscle fatigue when wearing your denture for extended periods
• Difficulty chewing certain foods that you could manage previously
• Your denture seems to "clap" or move when you eat or speak
• You notice your lower face looks shorter in photographs compared to earlier years

These signs do not necessarily mean something is wrong, but they may indicate that a clinical dental review would be worthwhile. A dental professional can assess the fit and condition of your denture and advise on whether it remains clinically suitable.

You can learn more about denture assessment and replacement options at MD Dental if you are considering a review.

The Dental Science Behind Denture Wear and Facial Changes

To appreciate why this process occurs, it is helpful to understand the materials used in most conventional dentures. The teeth on a standard acrylic denture are made from polymethyl methacrylate (PMMA) — a durable plastic that, while functional, is considerably softer than natural tooth enamel or porcelain.

Over years of use, acrylic teeth wear down at a measurably faster rate than natural teeth would. Studies in dental literature have suggested that acrylic denture teeth can lose significant occlusal height within five to eight years of regular use, depending on the individual's chewing forces and habits.

As this height is lost, the lower jaw must travel further upward before the teeth meet. The muscles of mastication — the muscles responsible for jaw movement — adapt to this changed position. Over time, the jaw adopts this over-closed position as its new normal, which is reflected in the external appearance of the lower face.

This process is gradual and often causes little discomfort in many cases, which is precisely why it often goes unnoticed until the changes have become quite pronounced. Regular dental reviews, ideally every one to two years, allow a dental professional to monitor denture condition and facial height before significant changes accumulate.

When a Professional Dental Assessment May Be Appropriate

If you recognise any of the signs described above, or if you have been wearing the same denture for five or more years without a review, it may be a good time to arrange a dental appointment. A qualified dental professional can assess:

• The degree of wear on your existing denture teeth
• Whether your vertical dimension of occlusion has been compromised
• The fit and stability of the denture base against your gum ridge
• The extent of any underlying bone resorption
• Whether your existing denture can be adjusted or relined, or whether a replacement would be more appropriate

It is important to approach this without alarm. Facial changes related to denture wear are very common, and in most cases, they are entirely manageable with appropriate dental care. A thorough clinical examination is the only reliable way to assess your individual situation and explore what options may be suitable for you.

If you are experiencing jaw discomfort, muscle fatigue, or persistent soreness related to your denture, these symptoms similarly warrant a dental review. Dental symptoms and treatment suitability should always be assessed individually during a clinical examination.

Preventing Premature Denture Wear and Maintaining Facial Support

While some degree of denture wear and bone resorption is inevitable, there are steps that may help maintain your denture's condition and reduce the rate of deterioration:

• Attend regular dental reviews — ideally every one to two years — so that wear and fit changes can be identified early
• Avoid very hard or abrasive foods where possible, as these accelerate wear on acrylic denture teeth
• Remove your denture at night and soak it in a suitable denture cleaner to maintain hygiene and allow the underlying tissues to rest
• Handle your denture carefully — acrylic dentures can crack or warp if dropped or improperly stored
• Do not attempt to adjust or repair your denture at home, as this can affect the fit and potentially harm the underlying tissues
• Report changes in fit early, rather than waiting until the denture becomes very loose or uncomfortable

For patients who are concerned about long-term bone preservation, a dental professional may discuss options such as implant-retained dentures, which can help reduce the rate of bone resorption by providing stimulation to the jaw. Dental implant options may be worth exploring with your dentist to understand whether this could be suitable for your individual circumstances.

Key Points to Remember

• An old, flat denture can reduce the vertical dimension of occlusion, causing the chin to appear closer to the nose
• This change is driven by both the wear of acrylic denture teeth over time and ongoing bone resorption beneath the denture
• The process is gradual and often goes unnoticed until facial changes become more pronounced
• Signs such as a looser denture, jaw discomfort, facial muscle fatigue, or visible shortening of the lower face may indicate that a review is needed
• Regular dental reviews — every one to two years — are recommended for all denture wearers
• Treatment suitability, including whether a reline, adjustment, or new denture is appropriate, depends entirely on individual clinical assessment

Frequently Asked Questions

Conclusion

Wearing an old, flat denture can indeed contribute to a gradual change in facial appearance, including the chin appearing closer to the nose. This occurs as the worn teeth on the denture reduce the vertical dimension of occlusion — the natural height your teeth provide between the upper and lower jaws — and as bone resorption beneath the denture alters the shape of the supporting tissues over time.

The reassuring news is that this is a well-understood dental concern, and for many patients, replacing a significantly worn denture with one that restores appropriate facial height can have a meaningful impact on both function and appearance. Early recognition of the signs of wear, combined with regular dental reviews, is the most effective approach to managing this process.

If you have been wearing the same denture for several years and have noticed changes in fit, facial appearance, or jaw comfort, arranging a dental assessment would be a sensible first step. Dental symptoms and treatment options should always be assessed individually during a clinical examination.