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Why Did My Tooth Break and What Happens Next?

Dr. Roksar obtained his dental degree from Columbia University. He also holds a specialty certificate in prosthodontics.

Breaking a tooth can be a startling and painful experience, and it often happens in a way that leaves us wondering what we might have done to cause it. Teeth break for a variety of reasons—not all of them preventable—and an underlying problem may have been present for many years. You can be relatively certain that the real cause was probably not the mashed potatoes you were eating when it happened!

Breaks can range from small chips to major fractures, so you might need a major procedure, a minor adjustment or no treatment at all.

Breaks can range from small chips to major fractures, so you might need a major procedure, a minor adjustment or no treatment at all.

What Caused the Break?

As you might expect, there are many different types of tooth fractures. Aside from the obvious causes such as accidental injury, teeth can weaken and break as a result of normal aging, older fillings, and excessive pressure that occurs during chronic grinding, clenching, or when the teeth fit together abnormally. Some fractures and chips are hard to predict or avoid simply because the process of repairing damaged or decayed teeth sometimes leaves them more vulnerable than the way mother nature made them.

Diagnosing a Fracture

Silver amalgam fillings have been used in dentistry for many decades, and although they are still regarded as safe and appropriate, they are often the underlying cause of unexplained broken teeth. Metal fillings expand and contract with temperature changes in the mouth, and over time this process causes movement of the tooth, and eventually, tiny cracks form.

The weakened tooth unexpectedly breaks one day—sometimes while eating something innocent! The culprit was actually simple physics, not your lunch. Many dentists prefer to use white plastic (composite) fillings which do not expand and contract as a way to prevent this problem.

A cracked tooth or root is one of the most difficult to diagnose issues in dentistry, often causing significant discomfort without being readily detectable visually or on an x-ray. Vertical root fractures happen most frequently in teeth that have had root canal therapy or teeth in which the nerve has been dead for a long time; sometimes, it is the unavoidable result of placing a metal post in the tooth to provide extra support after the root canal is complete. Unfortunately, a root fracture is usually considered catastrophic, requiring that the tooth removed to avoid chronic abscesses.

After a root canal procedure, dentists will often place a cap over the affected tooth.

After a root canal procedure, dentists will often place a cap over the affected tooth.

How Aging Affects Your Teeth

You probably would not be very surprised to learn that teeth, like the rest of our bodies, are affected by the aging process. With normal aging, nerve tissue and blood vessels that are found in the pulp or core of teeth, gradually become smaller and fewer. As a result of the decreased fluid content, the teeth become brittle.

The same process occurs when a root canal is performed and the pulp of the tooth is completely removed; this is the reason why the dentist almost always recommends that a crown (cap) be placed after the root canal is complete. Brittle teeth fracture or chip easily, but fortunately, the reduced nerve tissue means that little if any pain is experienced when a fracture is severe.

Temperature Changes Cause Damage

The enamel and the underlying dentin also expand and contract at slightly different rates in response to temperature changes from hot and cold foods. Over a lifetime this natural process causes visible, vertical cracks known as craze lines in the more brittle outer layer of enamel.

Although painless, craze lines are most noticeable in the front teeth and often cause concern to patients. Dentists regard them as an expected part of the anatomy of the teeth, formed as a result of normal wear and tear and very often they require no treatment.

A chipped tooth

A chipped tooth

My Tooth Is Broken: What Next?

Obviously, the treatment your dentist recommends will depend on how severely the tooth was damaged. Breaks can range from small chips to major fractures, so you might need a major procedure, a minor adjustment or no treatment at all. A tooth has three layers: the enamel is the hard outer shell, the dentin is found under the enamel, and the pulp, which is the nerve center, is at the core.

Minor chips are common and involve the loss of some enamel. Usually, little or no pain is felt, but if enough tooth enamel is lost, the dentin may be exposed, which might cause sensitivity to cold. The most severe breaks expose the pulp, which can cause extreme pain and even bleeding.

At-Home Care for Minor Chips

If you have a small chip in your tooth, make a routine dental appointment, and try an over-the-counter pain medicine for sensitivity as long as it is safe for you to take it. More serious fractures should be evaluated immediately. Rinse your mouth out with warm water, cover the break with a piece of clean gauze to protect it, and see the dentist as soon as possible. Apply an ice pack to minimize swelling if your mouth or lips were injured, and avoid using aspirin for pain because it increases the risk of heavy bleeding.

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The Tooth Can Often Be Saved

Even if your tooth is only slightly chipped, the dentist is probably going to take an x-ray of the damaged tooth and recommend being gentle with it for a few days. A minor chip can often be smoothed out or repaired with white filling material, often without anesthetic. Even when a break is severe, a tooth can almost always be saved with a permanent crown if the pulp is not damaged.

Postponing a crown or filling replacement that has been recommended can place the tooth at risk for a much more serious fracture—perhaps one that cannot be repaired. On those occasions when a tooth must be removed after a fracture, there are several options available for replacing the missing tooth. An implant is often the ideal choice for many people because it provides a permanent solution with a natural appearance.


Could I Have Prevented It?

Your dentist may not specifically say so, but he is watching for signs that old silver fillings may need to be replaced or crowned, and he may notice signs of potential problems or risky habits even before you do! If you clench or grind your teeth, he may suggest wearing a mouth guard during stressful times or when sleeping. An abnormal bite may require an adjustment, and sometimes orthodontic treatment may be recommended to reduce unwanted stress and permanently correct the problem.

Common Sense and Checkups

Not every fracture can be prevented, but using good old-fashioned common sense will go a long way. Take reasonable precautions to prevent fractures by protecting children and the elderly from falling hazards at home and using a mouth guard while playing sports. Avoid chewing on hard objects like pens, paperclips, fingernails, ice, and even candy . . . especially if you have broken a tooth in the past.

Above all, schedule regular dental checkups because your dental professional is the best source of advice about your risk and what can be done to minimize it.

This content is accurate and true to the best of the author’s knowledge and does not substitute for diagnosis, prognosis, treatment, prescription, and/or dietary advice from a licensed health professional. Drugs, supplements, and natural remedies may have dangerous side effects. If pregnant or nursing, consult with a qualified provider on an individual basis. Seek immediate help if you are experiencing a medical emergency.


westmids 67 on January 25, 2018:

my 2yr old grandson was eating an apple when his tooth broke off at the gum line. Why would this happen. My daughter called his dentist who couldn't see him for 9 days. Could there be a medical underlying issue? Is there reason for me to be concerned ? ive never ever known this happen whilst eating at such a young age.


glynis moss on October 22, 2017:

In the past month I have had two crowns break of fat root level. What is the reason?

Allison on March 14, 2017:

My teeth always break off when I'm brushing my teeth, chewing gum or just chewing food. I'm not sure this is normal for a 14 year old. My teeth are very sensitive to cold/warm food and so i avoid them. I also avoid fizzy drinks, though I used to drink some at the start of last semester. Recently my teeth chipped off near a cavity and has become highly sensitive and I'm unable to sleep or concentrate on my school work. What do I do to get rid of the pain

Alicia Campbell on January 20, 2017:

I was eating nachos at school lunch and i felt something crack that wasn't the chip and i felt my tooth move but i felt and the back half of my tooth was loose i went to the nurse and she said there was no break or chip otherwise part of your tooth would be missing i get to gym at the end of the day and i look in the minor and i slightly pull on the back of my tooth and there is a big crack going down the middle i would love to know what made this happen

Abbas C on January 15, 2017:

I just chipped 3 teeth when I fell. Is there any way to reduce the bleeding or do i have to wait until tomorrow to see the dentist

violet on May 18, 2016:

A tooth broke of my dentures. Why do I have to pay another 300.00 to have it replaced? I was 6 mths old. The dentist says it will only break again unless I get full top dentures. I swallowed it in a restaurant.

karen on September 06, 2015:

I have two teeth that have broke off into my mouth they both came out now another one is breaking off so I think im going to need dentures soon dealing with bad teeth!

khawaja on April 14, 2015:

I have two upper teeth started breaking on both sides please recommend what I do.

Heather on April 09, 2014:

I had 3 teeth in bottom break at the gum on inside where my tounge is what's next. When I go to dentist

Bolivar Luperon from Atlanta, GA on September 04, 2013:

Dental schools could be good options. They charge anywhere between 25 to 5o % compared to private practices. The only drawback are the waiting lists and slow downed process .

Sandra Everson on April 02, 2013:

I just had three teeth break off at the gum line (lower center)-no insurance, and Iam on social security. Would a dental school help me at a reduced price? What else would you recommend?

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