An impacted tooth occurs when a developing tooth is unable to erupt normally through the gums into the mouth. This typically happens when there is not enough space in the jaw, or when the tooth is blocked by surrounding bone, gum tissue, or adjacent teeth.Teeth normally move gradually into position as they erupt from the jawbone through the gum tissue. If this pathway is obstructed, the tooth may remain partially or completely trapped beneath the gums. In some cases, only a portion of the tooth becomes visible, while the rest remains embedded in the jaw.If this condition persists, the impacted tooth may press against neighboring teeth, irritate surrounding tissues, or create spaces where bacteria can accumulate. Impacted teeth are most commonly associated with third molars (wisdom teeth), but other teeth such as canines can also become impacted.
Understanding
Impacted Tooth
Clinical Significance
Can lead to pain, swelling of gum tissue, infection around the tooth, damage to nearby teeth, cyst formation, crowding, and increased risk of tooth decay or gum disease if untreated.
Common Causes
Insufficient space in the jaw, crowding of teeth, abnormal tooth angulation during development, thick gum tissue, obstruction from nearby teeth, delayed tooth eruption.
Signs & Symptoms
Possibly none, gum swelling around the affected tooth, pain or pressure in the jaw, partially erupted tooth, bad breath, difficulty opening the mouth, tenderness when chewing.
How It's Detected
Clinical dental exam, dental X-rays to identify tooth position in the jaw, evaluation of eruption patterns, imaging such as panoramic radiographs to assess impacted teeth.
Treatment Options
Monitoring without treatment, surgical exposure of the tooth, orthodontic guidance to reposition the tooth, extraction of the impacted tooth, treatment of associated infection.
Benefits to Treatment
Reduces pain and inflammation, prevents infection or damage to nearby teeth, improves tooth alignment when possible, reduces risk of crowding and future dental complications.
Prevention
Regular dental exams during childhood and adolescence, early orthodontic evaluation, monitoring tooth eruption with dental X-rays, maintaining oral hygiene to reduce infection risk.
Frequently Asked Questions
What does it mean when a tooth is impacted?
An impacted tooth is a tooth that cannot fully erupt into its normal position in the mouth. Instead of emerging through the gums as expected, the tooth becomes trapped beneath the gum tissue or within the jawbone. This often occurs when there is not enough room for the tooth to come in properly. Impacted teeth may remain completely hidden or only partially visible in the mouth. The condition is most commonly seen with wisdom teeth, but other teeth can also become impacted.
Which teeth are most commonly impacted?
Wisdom teeth, also called third molars, are the teeth most commonly affected by impaction. These teeth typically erupt in the late teenage years or early adulthood, when the jaw may already be crowded with existing teeth. Upper canine teeth are another type that can become impacted because they develop high in the jaw and require a clear path to erupt. Dentists often monitor these teeth during adolescence to ensure they develop normally.
Do impacted teeth always cause pain?
Impacted teeth do not always cause noticeable symptoms. In some cases, a person may not realize a tooth is impacted until it is discovered during a dental exam or on a routine X-ray. However, when symptoms occur, they may include jaw discomfort, swelling of the gums around the tooth, difficulty chewing, or bad breath caused by trapped bacteria. Pain is more likely when the tooth partially erupts or when infection develops around the impacted area.
Why are impacted wisdom teeth often removed?
Impacted wisdom teeth are frequently removed because they can increase the risk of dental problems. When wisdom teeth remain trapped or partially erupted, they can create spaces that trap bacteria and food debris. This may lead to infection, gum inflammation, or tooth decay affecting nearby teeth. Impacted wisdom teeth can also push against neighboring teeth, potentially contributing to crowding. Dentists evaluate the position of wisdom teeth using X-rays to determine whether removal may reduce the risk of future complications.
How are impacted teeth treated?
Treatment for impacted teeth depends on the tooth’s position, symptoms, and potential impact on surrounding teeth. In some cases, dentists may monitor the tooth over time if it is not causing problems. When treatment is needed, a common approach is surgical removal of the impacted tooth. In certain situations, particularly with impacted canine teeth, orthodontic treatment may be used to guide the tooth into its proper position after surgical exposure. The treatment plan is typically based on imaging and clinical evaluation.