Why Do My Dentures Break?

If you have ever opened your denture box in the morning, looked down and thought, well that is not ideal, then you are not alone. As a Clinical Dental Technician running Swissedent Denture Clinic, I see this more often than you might imagine. Dentures are hardworking little heroes, taking thousands of chewing cycles a day, dealing with hot curries, cold smoothies, the occasional accidental bite on a fork, and sometimes even the floor when they slip out of your hands.

So when a denture breaks, it is usually telling us something. In this guide, I will walk you through the most common reasons dentures crack or snap, how to prevent it, and when it is time to visit us for help. I will keep things clear, friendly, and just technical enough so you know you are getting expert advice without feeling like you are reading a science textbook.

Natural Wear And Tear Over Time
Dentures go through a lot. Every time you chew, grind, speak or swallow, your denture absorbs pressure. Even the highest quality acrylics and premium materials will show signs of fatigue after a few years. Tiny hairline cracks can form long before you notice anything. Think of dentures like tyres on a car. They work brilliantly, but eventually the materials get tired. When this happens, a simple bite on something slightly firm can be the final straw. Regular check ups help catch early signs of wear, so your denture can be repaired or reinforced before it becomes a bigger problem.

Poor Fit And Changes In Your Mouth
Your mouth does not stay the same shape forever. Bone naturally shrinks over the years, especially after losing natural teeth. This shrinkage can leave your dentures feeling loose or unstable. When dentures do not fit snugly, they rock or flex during chewing, and this movement puts extra strain on the acrylic. That strain often leads to cracks across the midline or around the teeth. A denture that fitted perfectly three years ago may be completely wrong for you today. A reline, remake or implant supported option can stop your dentures behaving like a seesaw every time you eat.

Accidental Drops And Mishaps
It happens to everyone. Wet hands, slippery dentures, fast running water and suddenly your denture is flying like a bobsleigh straight toward the sink or the hard tiled floor. Acrylic is strong but not invincible. One drop can create a fracture, even if the break appears days or weeks later. I always recommend cleaning dentures over a folded towel or a bowl of water. It is a small habit that saves a lot of stress.

Biting On Foods That Are A Bit Too Ambitious
Dentures are designed for eating, but they are not designed for everything. Sometimes people forget and bite directly into very hard foods. Think uncut apples, baguette ends, boiled sweets, tough meats or that stray popcorn kernel hiding at the bottom of the bowl. These foods create uneven pressure on the denture and can cause cracks or popped teeth. You do not have to give up the joys of food, but adjusting how you bite into things makes a big difference. Cut hard foods into smaller pieces and chew evenly on both sides. Your dentures will thank you.

Teeth Grinding And Clenching
Many people grind their teeth at night without knowing it. When you wear dentures, this habit can transfer huge forces across the acrylic. If you wake up with tender gums, sore jaw muscles or find your dentures moving more than usual, grinding may be the culprit. Night time grinding can weaken the structure of your denture until one day it suddenly snaps. A simple nightguard or a stronger high impact denture material can protect both your dentures and your jaw.

Thin Or Old Acrylic
If your denture was made many years ago, the acrylic may be thinner or more brittle compared with modern materials. Techniques, resins and reinforcement methods have all improved massively. Older dentures often have weaker areas, especially around the centre or between the teeth. Once these thinner areas start flexing, it is only a matter of time before a fracture appears. Upgrading to a modern, high impact Swissedent denture can prevent this problem and improve comfort at the same time.

Previous Repairs That Were Not Done Correctly
Some patients try temporary home fixes with superglue, DIY kits or online quick fixes. I promise you this is one of the fastest ways to turn a small crack into a full break. Glue can damage the acrylic, distort the fit and even cause chemical burns to your mouth. If a denture has been repaired incorrectly, the weak area often fails again. A professional repair ensures the pieces line up perfectly, the acrylic bonds safely and the denture maintains proper bite alignment.

Changes In Bite Or Missing Opposing Teeth
Your denture relies on even, balanced forces. If you lose a tooth in the opposite arch or if your bite changes due to new dental work, your denture may suddenly be taking pressure in all the wrong places. These new forces can cause flexing and stress fractures. A bite assessment helps identify whether your denture still fits your bite or whether adjustments are needed.

Using Dentures As Tools
You would be surprised how many people use their dentures for tasks that would terrify any dental professional. From opening packets to biting off tags on clothes to holding nails between the teeth for DIY projects, dentures sometimes get used for everything except chewing food. This kind of misuse leads to fractures and broken teeth. Dentures are strong, but they are not built for household jobs. Let them stay safely in your mouth, and the toolbox can handle the rest.

How To Prevent Dentures From Breaking
Here are practical, patient friendly habits that dramatically reduce the risk of damage:

• Keep your dentures properly fitted with regular check ups
• Clean them over a towel or bowl of water
• Avoid biting into very hard foods
• Cut tough foods into manageable pieces
• Chew evenly on both sides
• Get grinding or clenching assessed
• Store dentures in water when not wearing them
• Avoid DIY repairs and leave the glue in the drawer
• Ask for a reinforced or high impact denture material if you tend to break things easily
• Simple steps, but consistently applied, they keep your dentures stronger for longer.
  
  

What To Do If Your Denture Breaks
First, do not panic. It is almost always repairable. Place the pieces safely in a case, do not try to glue them, do not tape them and do not continue wearing them. Book an appointment so we can repair the denture correctly, assess why it broke and help prevent it happening again. In some cases a remake may be the better long term solution. We always give clear advice based on your gums, your bite, your lifestyle and how your dentures have been behaving.

When To Consider A New Denture
If your dentures are more than five to seven years old, feel loose, break frequently or no longer feel comfortable, it may be time for a fresh set. Modern dentures offer improved strength, better fit, more natural aesthetics and increased stability. You deserve a denture that works with you, not against you.

Final Thoughts
Dentures break for many reasons, but every reason has a solution. Understanding why it happened helps you avoid the same issue in future. If your denture is cracked, unstable, uncomfortable or feeling unreliable, come see us at Swissedent Denture Clinic. We will get you smiling, chewing and living confidently again. Your dentures might not be indestructible, but with the right care and expert support, they can be comfortable, durable and dependable for years.

Book your free consultation today at Swissedent Denture Clinic and let’s get you smiling again.

📍 Based in Walthamstow, London E17 7PJ
📞 0203 489 2055  
🌐 www.swissedent.co.uk