Why Dentures Can Make the Face Look Collapsed
Some patients come to our office concerned that their dentures make their face look shorter, sunken, or older than it should. They may notice their lips appear thinner, their chin seems closer to their nose, or their smile no longer shows the teeth the way it used to.
In many cases, this appearance comes down to a single factor: the height of the bite.
What Is a Collapsed Bite?
A collapsed bite occurs when the distance between the upper and lower jaws becomes too small. This can happen for several reasons:
- natural teeth wearing down over time
- teeth being lost
- dentures that have worn down after years of use
- dentures that were originally made with insufficient bite height
When this happens, the lower third of the face loses its natural support. The muscles, lips, and soft tissues no longer have the proper foundation beneath them.
How a Collapsed Bite Changes Facial Appearance
When bite height decreases, visible changes follow. Patients may notice:
- lips that look compressed or thinner
- the corners of the mouth drooping downward
- deeper wrinkles around the mouth and chin
- the chin appearing closer to the nose
- fewer teeth showing when smiling
Many people describe this as their face looking collapsed, aged, or worn. It is one of the most common reasons patients seek new dentures.
Dentures Are More Than Just Teeth
Dentures do not simply replace missing teeth. They also provide structural support for the lips, cheeks, and lower face.
When dentures are properly designed, they help restore:
- the natural height of the lower face
- lip fullness and support
- natural tooth display when smiling
- comfortable jaw position during chewing and speaking
The goal is not only to create teeth that fit — it is to restore a natural and comfortable facial appearance.
Research on Bite Height and the Smile
In my research on how bite height affects smiling, we studied how changes in jaw height influence the way lips and teeth appear during a smile. The results showed that increasing vertical dimension increases the amount of tooth visible during a smile and changes the vertical proportions of the smile — while the width of the smile stays largely the same.
This confirms that the height of the bite plays a significant role in how a smile — and a face — appears, even though it is not something most patients think about directly. You can read more in: How Bite Height Affects Your Smile.
Why Older Dentures Often Cause This Problem
Dentures change over time. The acrylic teeth gradually wear down with use, and the denture base may slowly compress and change shape. After many years, the vertical dimension can decrease noticeably.
Signs that dentures may need to be evaluated or replaced include:
- dentures feel loose or uncomfortable
- chewing has become less efficient
- the face appears more collapsed than when dentures were first made
- dentures are five or more years old
How Bite Height Is Restored
When dentures are replaced or redesigned, dentists carefully evaluate the correct bite height for each patient. This evaluation considers:
- facial measurements and proportions
- lip position during smiling and speaking
- jaw muscle comfort
- the natural relationship between the nose and chin
The goal is to restore a bite height that looks natural, supports the face properly, and feels comfortable during everyday activities.
A Healthy Smile Supports the Whole Face
A natural smile depends on the balance between teeth, lips, and jaw position. Proper bite height is one of the key factors that allows dentures to support — rather than collapse — the appearance of the face. When done well, new dentures can restore both function and a more youthful, balanced facial appearance.