Grinding and Jaw
Why do my teeth look shorter than they used to?
4 August 2026 · The Dentist, Al Qusais, Dubai
The short answer
The most common reason is gradual wear from grinding or clenching your teeth, often at night, which flattens the biting edges over years without you noticing. Acid erosion from diet or reflux, and gum changes that expose more or less of the tooth, can also make teeth look shorter than they used to be. It rarely happens overnight, so if you have noticed a real change, it is worth having a dentist look at your bite and enamel to find the cause before it progresses further.
Grinding and clenching wear teeth down slowly
Enamel is hard, but it is not indestructible. If you grind or clench, especially during sleep, the front teeth and back teeth are grinding against each other with far more force than normal chewing ever produces. Over months and years, this wears the biting edges flat and shortens the visible tooth. Many people have no idea they grind because it happens while they are asleep. The giveaway signs are a partner mentioning the noise, waking up with a sore jaw or tight temples, or a dentist noticing flattened, shiny wear facets on the front teeth during a checkup.
This kind of wear tends to affect the front teeth first because they meet edge to edge during certain jaw movements. It is also why the change can seem sudden when you finally notice it. The wear itself was gradual, but one day the shorter length just becomes obvious in a photo or the mirror.
It is not always the tooth itself that has changed
Sometimes teeth are the same length but look shorter because of what is happening around them. Gum recession exposes more of the root and can make the crown of the tooth look stubbier by comparison, while gum overgrowth or swelling can cover more of the tooth and make it look shorter than it is. Acid erosion from frequent fizzy drinks, citrus, wine or acid reflux softens and thins enamel in a different pattern to grinding, often leaving edges that look slightly translucent or scooped out rather than flat.
Age plays a role too. Teeth do wear a little over a normal lifetime just from years of chewing, and this is expected to some degree by your fifties or sixties. What is not normal is noticeable shortening in your twenties or thirties, or wear that is happening faster on one side than the other. That pattern usually points to a bite problem, a habit like nail biting or pen chewing, or grinding that needs managing.
What a dentist actually checks and what happens next
A proper assessment looks at more than the teeth in isolation. Your dentist will check how your teeth meet when you bite together, look for wear facets and their pattern, ask about jaw pain, headaches or a clicking jaw, and consider your diet and any reflux history. This tells them whether the cause is mechanical wear, chemical erosion, or a mix of both, and whether the pace of wear is a concern or something to simply monitor.
Treatment depends entirely on what is driving it. A night guard is often the first step if grinding is confirmed, since it protects the enamel from further wear regardless of what is causing the habit. Where teeth have already lost noticeable length, options range from bonding to rebuild edges, to veneers or crowns for teeth with more significant wear, through to a fuller rehabilitation if the bite itself needs restoring to its correct height. None of these decisions should be made from a photo or a guess. If your teeth genuinely look shorter than they did a few years ago, book the free checkup at The Dentist in Al Qusais. Dr. Faris Alkhanafseh or Dr. Mohammad Nour can look at the wear pattern directly, tell you honestly whether it is a habit to manage or a cosmetic concern worth treating, and give you a written plan with costs before anything is decided.
This article is general information, not a diagnosis. If you are in Dubai, the free first checkup at our Al Qusais clinic is the fastest way to get an answer about your own teeth.