Why Do Teeth Break Inside Braces? Dental Fragility - Dentistry

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Fractured teeth under braces?


Not long after getting the braces, I started feeling discomfort and had difficulty biting.
After 2 years and 3 months, the braces came off, and I discovered a large piece of tooth stuck inside the braces.
Why did the tooth break into two pieces while wearing the braces, and why was such a large piece broken? Are teeth really that fragile? However, the braces themselves were undamaged.
Why did this happen?

Dudu Nan, 20~29 year old female. Ask Date: 2009/03/30

Dr. Huang Zhicheng reply Dentistry


Hello, teeth that require crowns are mostly those that have undergone root canal treatment.
These teeth are inherently weak and need the protection of a crown.
However, if the teeth have already fractured during the carious process or if there are subtle cracks that are not easily noticeable before placing the crown, they may eventually fracture under occlusal pressure over time.
Wishing you safety and health.
Sincerely, Dr.
Chih-Cheng Huang, Director of Dentistry, Taoyuan General Hospital, Department of Health.

Reply Date: 2009/03/30

More Info


Teeth breaking inside braces can be a concerning issue for many patients undergoing orthodontic treatment. Understanding the reasons behind this phenomenon requires a closer look at dental fragility, the nature of orthodontic appliances, and the overall health of the teeth involved.

First and foremost, it is essential to recognize that teeth that require braces often have pre-existing conditions that contribute to their fragility. Many of these teeth may have undergone previous treatments, such as root canal therapy, which can weaken the tooth structure. After a root canal, the tooth can become more brittle due to the loss of vital nerve and blood supply, making it more susceptible to fractures under pressure. Additionally, teeth that have been subjected to extensive decay or have large fillings may also lack the structural integrity needed to withstand the forces exerted by braces.

The mechanics of braces themselves can also play a significant role in tooth breakage. Braces work by applying continuous pressure to teeth to move them into the desired position. This pressure can be substantial, especially during the initial stages of treatment or when adjustments are made. If a tooth is already compromised, the added stress from the braces can lead to fractures. In some cases, the movement of the teeth can cause existing cracks or weaknesses to propagate, resulting in a more significant break.

Another factor to consider is the duration of time that the braces are worn. In your case, after two years and three months of wearing braces, the prolonged exposure to constant pressure may have contributed to the weakening of the tooth structure. Over time, the cumulative effects of the forces applied can lead to fatigue in the tooth material, making it more likely to break.

Moreover, the type of orthodontic treatment can influence the risk of tooth breakage. For instance, traditional metal braces may exert different forces compared to clear aligners. The design and fit of the braces can also affect how evenly the forces are distributed across the teeth. If the braces are not properly adjusted or fitted, certain teeth may bear more stress than others, increasing the likelihood of fractures.

It is also worth noting that oral hygiene plays a critical role in maintaining the health of teeth during orthodontic treatment. Poor oral hygiene can lead to gum disease and tooth decay, which can further compromise the strength of the teeth. Patients with braces must be diligent in their oral care routines to prevent these issues, as they can exacerbate the fragility of the teeth.

In conclusion, teeth can break inside braces due to a combination of factors, including pre-existing dental conditions, the mechanical forces applied by the braces, the duration of treatment, and the overall oral hygiene of the patient. If you experience any discomfort or notice any changes in your teeth while wearing braces, it is crucial to consult with your orthodontist promptly. They can assess the situation, provide appropriate care, and make necessary adjustments to your treatment plan to minimize the risk of further complications. Regular check-ups and open communication with your dental care team are essential for ensuring the best outcomes during orthodontic treatment.

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