What Is Tooth Resorption? Why That Pink Spot on Your Tooth Isn't a Stain

That small pink spot on your tooth may not be a stain, bruise, or discoloration. It can be a sign of tooth resorption, a condition in which the structure of the tooth begins to break down.

Tooth resorption can develop in the root or crown of a tooth and may progress from the inside out or the outside in. One of the challenges is that it doesn't always cause noticeable symptoms, so some people don't discover it until a dentist identifies the problem during an exam or on an X-ray.

Watch: What Is Tooth Resorption?

In this short video, the Silver State Smiles team explains what tooth resorption is, why it can make a tooth non-restorable, how dentists diagnose it, and when treatment may involve a root canal or dental implant.

What Is Tooth Resorption?

Tooth resorption is a process in which part of the tooth's structure begins to break down and disappear.

It can occur anywhere in the tooth, including the root or the visible crown. Depending on the type of resorption, the process may begin on the inside of the tooth and progress outward, or start on the outside and work its way inward.

If the resorption becomes extensive enough, there may eventually be too little healthy tooth structure remaining to restore the tooth successfully.

Internal vs. External Tooth Resorption

Dentists generally classify tooth resorption according to where the process begins.

Internal tooth resorption begins inside the tooth and progresses outward toward the external surface.

External tooth resorption begins on the outside surface of the tooth or root and progresses inward.

A pink or pinkish area on a tooth can sometimes be associated with internal resorption. However, discoloration alone cannot confirm a diagnosis. A dental examination and imaging are needed to determine what is actually happening.

What Causes Tooth Resorption?

There isn't always one identifiable cause.

In some cases, tooth resorption may develop following trauma to the tooth. This could include an injury, fall, impact to the mouth, or another event that damages the tooth.

In other cases, resorption can occur spontaneously, meaning there isn't an obvious traumatic event that explains why the process began.

Because resorption isn't always associated with a noticeable injury or symptom, regular dental examinations can play an important role in identifying it.

Warning Signs of Tooth Resorption

One of the reasons tooth resorption can be difficult to detect is that it isn't always painful or sensitive.

Some people may have no noticeable symptoms, particularly during the earlier stages.

When symptoms are present, they may include:

• A pink spot or pinkish discoloration on the tooth
• Tooth sensitivity to cold temperatures
• Sensitivity when eating or drinking something sweet
• Changes in the appearance of the tooth
• No symptoms at all

Sensitivity may become more noticeable if the resorption progresses closer to the nerve of the tooth.

If you notice a new pink or unusual discoloration on one of your teeth, don't automatically assume it's a stain. A dentist can examine the area and determine whether further imaging is necessary.

How Is Tooth Resorption Diagnosed?

Dental X-rays are an important tool for diagnosing tooth resorption.

Because the condition can develop without pain and may not always be visible during a routine visual examination, an X-ray can help a dentist see what's happening beneath the surface.

Imaging can help determine:

• Where the resorption is located
• How much tooth structure has been affected
• Whether the root or crown is involved
• How extensive the damage has become
• Which treatment options may still be possible

This is also why routine dental examinations and appropriate X-rays matter even when your teeth feel completely normal.

Can a Tooth With Resorption Be Saved?

Sometimes.

Treatment depends largely on where the resorption is located and how extensive it has become.

If enough healthy tooth structure remains, treatment may be able to stop the progression and preserve the natural tooth.

In some cases, that treatment may involve root canal therapy.

However, extensive resorption can leave too little healthy tooth structure to restore predictably. When that happens, the tooth may be considered non-restorable.

Tooth Resorption Treatment: Root Canal or Dental Implant?

There is no single treatment that works for every case of tooth resorption.

Root Canal Therapy

When appropriate, root canal treatment may be used to remove affected tissue and help preserve the natural tooth.

Whether a root canal is possible depends on the location and extent of the resorption and how much healthy tooth structure remains.

Tooth Extraction and Dental Implant

If resorption has caused extensive structural damage and the tooth can no longer be restored, extraction may be necessary.

A dental implant may then be considered to replace the missing tooth. Dental implants replace the missing tooth root with an implant placed in the jawbone, creating a stable foundation for a replacement tooth.

Your dentist will determine which approach is appropriate after examining the tooth and reviewing the necessary imaging.

What Happens If Tooth Resorption Goes Untreated?

Progressive tooth resorption can continue destroying tooth structure.

If enough structure is lost, a tooth that might once have been treatable can eventually become non-restorable.

This is one reason early diagnosis matters. Finding resorption before extensive damage has occurred may provide more options for preserving the natural tooth.

If the tooth ultimately has to be removed, leaving the space untreated can also affect the surrounding area over time. Your dentist can discuss replacement options based on your oral health, bone structure, and long-term needs.

Frequently Asked Questions About Tooth Resorption

Is tooth resorption painful?

Not always. Tooth resorption can occur without noticeable pain, particularly during its earlier stages. Some patients experience sensitivity to cold temperatures or sweets when the resorption approaches the nerve.

What does tooth resorption look like?

Sometimes there is no visible change at all. In other cases, you may notice a pink or pinkish area on the tooth. A visual change alone isn't enough to diagnose resorption, so the tooth should be evaluated by a dentist.

Can tooth resorption happen after an injury?

Yes. Trauma to a tooth is one possible cause of resorption. However, resorption can also occur spontaneously without an obvious traumatic event.

How do dentists diagnose tooth resorption?

Dental X-rays are commonly used to identify the location and extent of resorption. Your dentist will combine imaging findings with a clinical examination to determine the appropriate treatment.

Can tooth resorption be treated with a root canal?

In some cases, yes. Root canal therapy may be an option depending on the type, location, and extent of the resorption. More advanced cases may not have enough healthy tooth structure remaining to save the tooth.

Will I need a dental implant?

Not necessarily. A dental implant may be recommended if resorption is so extensive that the natural tooth cannot be restored and must be removed. Treatment recommendations depend on your individual case.

Schedule a Dental Exam in Las Vegas

If you've noticed a pink spot on your tooth, unexplained tooth sensitivity, or another change that doesn't seem normal, it's worth having it evaluated.

Because tooth resorption doesn't always cause pain, an examination and dental X-rays may reveal a problem before more extensive tooth structure is lost.

Silver State Smiles provides comprehensive dental care for patients throughout Las Vegas, including diagnosis and treatment planning for damaged or compromised teeth.

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This article is intended for general educational purposes and does not constitute medical or dental advice. Individual diagnosis, treatment options, and outcomes vary. A clinical examination and appropriate imaging are required to determine the right treatment for you.