Impacted Tooth

What is an impacted tooth?

An impacted tooth is a tooth that has failed to break through the gum into its normal position in the mouth, either completely or partially. Instead of erupting (emerging through the gum) on schedule, the tooth stays trapped in the jawbone or under the gum tissue, often because there is not enough room for it or because it is growing at an angle. Dentists describe a tooth as fully impacted when it is entirely covered by bone or gum, and partially impacted when only part of the crown (the visible top of the tooth) has come through.

Many people search for "what is impacted tooth" after a dentist mentions the term during a routine visit, because impaction frequently causes no obvious problem at first. The teeth most often affected are the third molars, commonly called wisdom teeth, which usually try to erupt in the late teens or early twenties at the very back of the mouth. The upper canines (the pointed teeth at the corners of the smile) are the next most commonly impacted teeth, and this is usually noticed in childhood or early adolescence. Less often, other teeth such as premolars or extra teeth can also become impacted.

Impaction can affect people of any age, but it is most commonly identified between the ages of about 12 and 25, when the permanent teeth are still emerging. It is a common dental finding rather than a rare disease, and in many cases it is discovered on a routine dental X-ray before any symptoms appear. Care for impacted teeth is typically provided by general dentists, oral and maxillofacial surgeons (surgeons who specialize in the mouth, jaws, and face), and orthodontists (dentists who specialize in tooth alignment). At Acibadem, this care falls under the Dental & Oral Health department.

Impacted tooth symptoms

Impacted tooth symptoms vary widely. Some people have no symptoms at all and learn about the impaction only through imaging. Others develop discomfort or infection, especially when the tooth is partially impacted and a flap of gum partly covers it, creating a pocket where food and bacteria can collect. Common signs and symptoms include:

• Pain or a dull ache at the back of the jaw or around a specific tooth site
• Red, swollen, or tender gums over the area where the tooth should be
• Bleeding gums when brushing near the site
• Swelling of the jaw or the side of the face
• Bad breath or an unpleasant taste in the mouth
• Difficulty or pain when opening the mouth fully
• Pain when chewing or biting
• A gap where a permanent tooth has not appeared, or a baby tooth that stays in place long after it should have fallen out
• Headache or jaw ache that seems to come from the back of the mouth

The pattern of symptoms often depends on the type of impaction and its stage. A fully impacted wisdom tooth buried deep in the bone may be silent for years, although it can sometimes press on the neighboring molar or contribute to a cyst (a fluid-filled sac that slowly enlarges in the jaw). A partially impacted wisdom tooth is more likely to cause repeated episodes of gum inflammation around the crown, a condition dentists call pericoronitis. These episodes may come and go, with pain, swelling, and sometimes a discharge of pus, and they can be triggered by food becoming trapped or by biting the swollen gum with the opposing tooth.

An impacted canine in a child or teenager usually produces no pain. Instead, the clue is often that a baby canine is still present at an age when it would normally have been replaced, or that the permanent canine is missing from the smile while the other permanent teeth have arrived. If symptoms escalate to fever, spreading facial swelling, or difficulty swallowing, the impaction may have led to a spreading infection, which needs prompt attention.

Impacted tooth causes and risk factors

The most common of the impacted tooth causes is simply a lack of space in the jaw. Wisdom teeth are the last to arrive, and by the time they try to erupt, the other teeth already occupy most of the available room. If the jaw is too small to accommodate them, the wisdom teeth may become stuck behind the second molars, tilt forward, tilt backward, lie horizontally, or remain buried. Other causes and contributing factors include:

• Crowding of the existing teeth, leaving no path for the new tooth to follow
• Abnormal position of the developing tooth bud, so the tooth grows at an angle away from its normal path
• A baby tooth that does not fall out on time, physically blocking the permanent tooth beneath it
• Early loss of a baby tooth, which can let neighboring teeth drift into the space the permanent tooth needed
• Extra teeth (supernumerary teeth) or small growths in the jaw that block the path of eruption
• Cysts or thick, fibrous gum tissue overlying the tooth
• Genetic factors, since jaw size and tooth size tend to run in families
• Certain inherited conditions that affect bone and tooth development

Risk factors are closely related to these causes. A family history of impacted teeth, a small jaw relative to tooth size, dental crowding, and a history of orthodontic problems may all increase the likelihood. Age is also relevant: impaction is most often identified during the years when permanent teeth are erupting. Impaction is not caused by poor brushing or diet, although poor oral hygiene can make a partially impacted tooth more likely to become infected once it is present.

Impacted tooth diagnosis

Impacted tooth diagnosis starts with a clinical examination. A dentist will look at the pattern of teeth in the mouth, check whether any expected teeth are missing or late, feel the gum and bone for bulges that may indicate a buried tooth, and examine any inflamed gum tissue around a partially erupted tooth. The dentist may also gently probe the gum to check for a pocket where bacteria could collect.

Imaging is essential to confirm the diagnosis and to plan any treatment. Commonly used imaging includes:

• Periapical X-rays, which are small X-rays that show one or a few teeth in detail from crown to root tip
• Panoramic X-ray (sometimes called an OPG), a single image that shows the entire upper and lower jaw, all the teeth, and the position of any buried teeth
• Cone-beam computed tomography (CBCT), a three-dimensional dental scan used when the dentist needs to see exactly how the tooth relates to nearby structures, such as the nerve that runs through the lower jaw, the sinuses above the upper teeth, or the roots of neighboring teeth

Using these images, the dentist or surgeon assesses several features: how deep the tooth lies, the direction it is angled (vertical, tilted forward, tilted backward, or horizontal), whether it is covered by bone or only by soft tissue, and whether it is close to important nerves or blood vessels. These details help classify the impaction and guide decisions about whether and how to treat it. In children, the dentist may also compare the child’s dental development with typical eruption timelines to judge whether a missing tooth is merely late or truly impacted. The examination will also look for complications, such as decay in the neighboring tooth, damage to a neighboring root, or a cyst around the buried crown.

Impacted tooth treatment options

Impacted tooth treatment options depend on the tooth involved, whether it is causing problems, the person’s age, and the risks of intervention. There is no single correct approach for everyone, and your dentist or oral surgeon may recommend one of the following or a combination.

Monitoring (watchful waiting). If an impacted tooth is not causing pain, infection, or damage to nearby teeth, many dentists recommend simply keeping an eye on it. This usually means regular dental check-ups and periodic X-rays to make sure the situation is not changing. Monitoring is commonly suggested for fully impacted wisdom teeth in adults that are causing no symptoms, particularly when removal would carry a meaningful risk of nerve injury.

Managing infection and pain. When a partially impacted tooth causes pericoronitis, the first step is often to reduce the inflammation. This may involve professional cleaning of the area, rinsing with warm salt water or an antiseptic mouthwash, and over-the-counter pain relievers as advised. If there are signs of a bacterial infection, such as pus or swelling spreading beyond the gum, a dentist may prescribe antibiotics. These measures treat the flare-up but do not correct the underlying impaction, so recurrent episodes are common unless the tooth is addressed.

Operculectomy. In some cases of a partially erupted tooth with a persistent flap of gum over it, a dentist may remove the flap of gum (the operculum) to make the area easier to clean. This is a relatively minor procedure, but the gum tissue can grow back, so it is not always a lasting solution.

Surgical extraction. Removal of the impacted tooth is the most common definitive treatment, especially for wisdom teeth that repeatedly become infected, cause decay or gum disease in the neighboring molar, are associated with a cyst, or are painful. The procedure is usually performed by an oral surgeon under local anesthesia, sometimes with sedation or general anesthesia depending on complexity and patient preference. The surgeon makes a small opening in the gum, may remove a small amount of bone, and sometimes divides the tooth into pieces to remove it more easily. Recovery typically involves a few days of swelling, mild bruising, and discomfort managed with pain medication, ice packs, soft foods, and gentle rinsing. Possible complications include bleeding, infection, a painful condition called dry socket (where the blood clot in the socket is lost early), and, less commonly, temporary or, rarely, lasting numbness of the lip, chin, or tongue if a nearby nerve is affected.

Exposure and orthodontic traction. For impacted canines and some other front teeth, the goal is often to save the tooth rather than remove it, because canines are important for a functional bite and appearance. An oral surgeon uncovers the buried tooth and attaches a small bracket and chain to it. An orthodontist then uses braces to gently guide the tooth into its correct position over months to a couple of years. This approach is generally most effective when started while the roots are still developing, which is one reason early evaluation in children is recommended.

Removing a blocking baby tooth. In some children, simply extracting a retained baby tooth or an extra tooth opens a path and allows the permanent tooth to erupt on its own. Dentists may combine this with monitoring to see whether the tooth then comes through without further intervention.

Rehabilitation after extraction. When a tooth other than a wisdom tooth is removed, the gap may later be addressed with orthodontic space closure, a dental implant, or a bridge, depending on the individual situation and age. Wisdom teeth are generally not replaced because they are not needed for chewing.

Living with an impacted tooth and outlook

The outlook for people with an impacted tooth is generally good, but it depends on the type of tooth, how it is managed, and whether complications have already developed. Many adults live for decades with a fully impacted, symptom-free wisdom tooth and never need treatment. Others experience repeated infections until the tooth is removed, after which the problem usually resolves. Recovery from wisdom tooth extraction typically takes about one to two weeks, though the deeper and more complex the impaction, the longer healing may take.

For children with impacted canines, the prognosis for bringing the tooth into position with orthodontic treatment is often favorable when the problem is identified early, although treatment takes time and success cannot be guaranteed in every case. If a canine cannot be brought into place, alternatives such as extraction with later tooth replacement are available.

Day to day, people with a known impacted tooth can reduce the risk of problems by brushing carefully around the area, using floss or interdental brushes, and rinsing with warm salt water if the gum becomes mildly sore. Keeping regular dental appointments allows changes to be caught early. Because impacted teeth can occasionally contribute to cysts, decay in adjacent teeth, or gum disease without obvious symptoms, ongoing monitoring is often recommended even when a decision has been made not to remove the tooth.

Frequently asked questions

What is an impacted tooth and is it the same as a wisdom tooth?

An impacted tooth is any tooth that has not fully erupted into its normal position because something is blocking its path or because there is not enough space. Wisdom teeth are the teeth most commonly impacted, but not every wisdom tooth is impacted, and other teeth, especially the upper canines, can be impacted too. The terms describe different things: one describes the tooth’s position, the other names a specific tooth.

What are the first impacted tooth symptoms I might notice?

Early symptoms often include tenderness or swelling of the gum at the back of the mouth, a dull ache in the jaw, bad breath, or an unpleasant taste. Some people notice pain when biting down because the opposing tooth presses on the swollen gum. However, many impacted teeth cause no symptoms at all and are found only on X-rays, so the absence of symptoms does not mean a tooth is not impacted.

What are the main impacted tooth causes?

The most common cause is a lack of room in the jaw, so that the last teeth to erupt have nowhere to go. Other causes include crowding, a tooth bud that develops at an abnormal angle, a baby tooth that stays in place too long, extra teeth, cysts, or dense gum tissue over the crown. Genetic factors influence jaw and tooth size and can make impaction more likely in some families.

How is impacted tooth diagnosis confirmed?

A dentist confirms the diagnosis by combining a clinical examination with dental X-rays. A panoramic X-ray shows the whole jaw and reveals buried teeth, and in more complex cases a three-dimensional cone-beam CT scan is used to see how close the tooth is to nerves, sinuses, or neighboring roots. In children, the dentist also considers whether a missing tooth is simply late or truly blocked.

What are the impacted tooth treatment options if it does not hurt?

If an impacted tooth is not causing pain, infection, or damage, many dentists recommend monitoring with regular check-ups and periodic X-rays rather than immediate surgery. Removal may still be suggested if the tooth is likely to cause future problems, such as decay in the neighboring molar or a cyst. The decision usually weighs the risks of surgery against the risks of leaving the tooth in place, and it can differ from person to person.

Does every impacted wisdom tooth need to be removed?

No. Removal is generally recommended when a wisdom tooth causes repeated infections, pain, decay, gum disease, or damage to nearby teeth, or when a cyst forms around it. A symptom-free tooth that is fully buried and not harming anything may be left in place and watched. Your dentist or oral surgeon may discuss the likely benefits and risks in your specific case.

Can an impacted tooth be prevented?

Impaction itself usually cannot be prevented because it is largely determined by jaw size, tooth size, and developmental factors. What can be prevented, in many cases, are the complications. Regular dental visits from childhood allow impacted or delayed teeth to be identified early, when options such as removing a blocking baby tooth or guiding a canine into place tend to work best.

When to see a doctor

Anyone who suspects an impacted tooth, notices a permanent tooth that has not appeared on schedule, or has recurring soreness at the back of the jaw should arrange a dental evaluation. Some situations need urgent care because they may indicate a spreading infection or another serious complication. Seek prompt medical or dental attention if you have any of the following:

• Fever or chills together with tooth or jaw pain
• Swelling of the face, jaw, or neck that is increasing or spreading
• Difficulty swallowing, difficulty breathing, or a feeling of tightness in the throat
• Inability to open the mouth more than a small amount
• Severe pain that is not controlled by recommended over-the-counter pain relievers
• Pus draining from the gum or a persistent foul taste
• Bleeding that does not stop after a recent extraction
• Numbness of the lip, chin, or tongue after dental surgery that does not begin to improve
• A general feeling of being unwell alongside any of the signs above

Swelling that affects breathing or swallowing is an emergency and requires immediate care at the nearest emergency department. For less urgent concerns, a dentist or oral surgeon can assess the tooth, confirm whether it is impacted, and discuss which management approach may be appropriate for you.