Contrary to common belief, teeth are not fixed permanently in place, even when you are an adult. The network of ligaments and bone that hold teeth in place continues to change throughout your life.
Understanding why this happens can help you take steps to protect your smile at any age.
Reasons Your Teeth Can Change as You Age
Tooth shifting with age is rarely the result of a single cause. More often, it is the combined effect of several gradual changes happening simultaneously in your mouth and jaw. Some of these are purely biological, while others are influenced by everyday habits you may not even be aware of.
Bone Changes
The bones of the jaw continue to evolve well into adulthood. Over time, the lower jaw undergoes a gradual narrowing and forward rotation that creates pressure on the lower front teeth, causing them to crowd and overlap, even in people who had perfectly straight teeth as young adults.
Bone density also decreases with age throughout the body, and the jaw is no exception. A less dense bone structure means teeth have a slightly less stable foundation, allowing for subtle movement that compounds over the decades.
Gum Recession
Gum tissue naturally recedes with age, exposing more of the tooth surface and slightly altering the positions of the teeth. Recession also affects the way bite pressure is distributed across the mouth, which can contribute to further shifting over time.
Daily Wear and Habits
Decades of chewing, talking, and biting down take a cumulative toll. As the biting surfaces of teeth wear down, the way your teeth fit together changes, and they gradually reposition to adjust. Habits like grinding your teeth at night or clenching during the day can accelerate this process considerably, putting significant repetitive force on the teeth and supporting structures.
A few other everyday habits that can contribute to shifting include:
- Sleeping on your side or stomach, which places prolonged pressure on one side of the face
- Resting your chin in your hand, which can apply consistent force to the jaw
- Tongue posture, as the way your tongue rests in your mouth, can exert gentle but constant pressure on the front teeth
Retainer Use
One of the most common reasons teeth shift in adulthood isn’t aging at all, it’s simply not wearing a retainer consistently. After orthodontic treatment, retainers are prescribed to hold the teeth in their corrected positions while the surrounding bone and tissue stabilize. When retainer use becomes inconsistent, the teeth gradually drift.
If you’ve lost your retainer, found that it no longer fits, or haven’t worn it in years, it’s worth reaching out to us sooner rather than later to prevent the need for more extensive treatment down the road.
What You Can Do About It
The good news is that shifting teeth are not something you have to accept. Today’s orthodontic options make it easier than ever for adults to address movement discreetly and efficiently.
Clear Aligners
Clear aligners are a popular choice for adults dealing with mild to moderate shifting. They are virtually invisible and fit seamlessly into a busy lifestyle, making them a practical option for many of our adult patients.
Clear Braces
For more significant movement, clear braces offer an effective and far less noticeable alternative to traditional metal braces. They work the same way, but with clear brackets that blend in with your smile.
If you’ve noticed changes in your smile and aren’t sure what’s causing them, a consultation is a great place to start. We can take a close look at what’s happening and talk through the options that make the most sense for you. Contact our office to schedule your visit today!
