Understanding Impacted Teeth: Types, Symptoms, and Care
Updated: 3 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Quick Answer: What Is an Impacted Tooth?
An impacted tooth is a tooth that fails to grow into its proper position, staying partially or fully under the gum line or within the bone, most often wisdom teeth and upper canines. [1] [2] It can be caused by overcrowding. [1] Some cause no symptoms, while others cause jaw pain, headaches and swelling. [1] Treatment may involve monitoring, eruption aids or extraction. [1]
What the research says
Impaction is most common in wisdom teeth, then canines. A meta-analysis of 20 studies (80,029 patients in Saudi Arabia) found a pooled prevalence of permanent tooth impaction of 7% (95% CI 4-11%). Mandibular third molars were impacted most often (15.9%), followed by maxillary third molars (6.2%) and maxillary canines (3.2%) (Alalola et al., Saudi Dental Journal, 2026) [2].
An impacted wisdom tooth can damage the tooth next to it. A systematic review and meta-analysis of 26 cone-beam CT studies found external root resorption on the adjacent second molar in 31% (95% CI 26-36%) of cases with an impacted third molar. It was more common with mesioangular, horizontal or transverse tilting and when the tooth touched the lower third of the second molar's roots (Liu et al., BMC Oral Health, 2026) [3].
Symptom-free impacted teeth can still hide changes in the surrounding sac. A meta-analysis of 7 studies (592 pericoronal follicles from asymptomatic impacted third molars) found pooled prevalences of 26.7% (95% CI 3.7-49.6%) for cystic changes and 21.6% (95% CI 12.9-32.2%) for dentigerous cysts, with very high heterogeneity. The authors note that current evidence does not support extraction based on these findings alone (de Andrade Tutu et al., Journal of Oral and Maxillofacial Surgery, 2026) [4].
Key Takeaways: Impacted Teeth at a Glance
Feature | Details |
Definition | A tooth trapped in the jawbone or gums that fails to erupt properly. [1] |
Most Common Sites | |
Primary Causes | Overcrowding, small jaw size, or crooked tooth alignment. [1] |
Core Symptoms | Jaw pain, red/swollen gums, bad breath, and difficulty opening the mouth. [1] |
Diagnosis | Clinical dental examination and diagnostic X-rays. [1] |
Treatment Options | Monitoring, eruption aids (for children), or surgical extraction. [1] |
Risk of Ignoring |
What Is an Impacted Tooth?
Dental impaction occurs when a tooth is blocked from breaking through the gum line into its functional position. [1] This condition is categorized by the degree to which the tooth is trapped within the oral structures.
Types of Dental Impaction
Understanding the type of impaction is crucial for determining the appropriate treatment plan. Dentists generally classify impaction into three distinct categories based on the tooth's location relative to the bone and soft tissue:
Soft Tissue Impaction: The tooth has successfully grown through the jawbone but remains trapped beneath the surface of the gums. [1]
Partial Bony Impaction: A portion of the tooth has erupted through the bone, but the remainder stays trapped, and no part of the tooth has broken through the gum tissue. [1]
Full Bony Impaction: The tooth is entirely encased within the jawbone, failing to erupt through either the bone or the gums. [1]
What are the symptoms and warning signs of impacted teeth?
The symptoms of an impacted tooth are not always constant; they may fluctuate in intensity or remain persistent. [1] In some cases, a trapped tooth may cause no noticeable symptoms at all, though it can still be causing underlying damage.
Common signs that a tooth may be impacted include:
Gum Inflammation: Redness, swelling, or bleeding gums specifically around the area of the trapped tooth. [1]
Radiating Pain: Significant jaw pain or recurring headaches that stem from the pressure of the impacted tooth.
Oral Hygiene Issues: Persistent bad breath or a lingering bad taste in the mouth, often due to bacteria trapped near the impaction.
Functional Limitations: Difficulty or discomfort when trying to open the mouth fully. [1]
Systemic Signs: Swollen lymph nodes in the neck, which may indicate a localized infection.
What causes impacted teeth, and what complications can they cause?
Impaction is rarely a result of poor oral hygiene; rather, it is typically a developmental or structural issue. The most common causes include crooked or twisted teeth growing at an angle, a jawbone that is too small to accommodate all teeth, or the presence of extra (supernumerary) teeth that cause overcrowding. [1]
Potential Oral Health Complications
Leaving an impacted tooth untreated can lead to a variety of secondary health problems. The pressure and positioning of the trapped tooth can result in:
Infections: Abscessed teeth or pericoronitis (inflammation of the gum tissue around back teeth). [1]
Structural Damage: Cysts forming under the gums or damage to the mandibular nerve in the lower jaw. [1]
Alignment Issues: Malocclusion, commonly known as a "bad bite," and damage to neighboring healthy teeth. [1] [3]
How are impacted teeth diagnosed and treated?
Identifying an impacted tooth requires a professional evaluation. A dentist will perform a clinical exam to check for swelling and use dental X-rays to visualize the position of the tooth roots and their relationship to the jawbone.
Management Strategies
Treatment is highly personalized and depends on the patient's age, symptoms, and the risk of future complications.
Wait and See: If the tooth is not causing pain or affecting oral health, a dentist may choose to monitor it. [1]
Surgical Extraction: This is the most common treatment for symptomatic impacted teeth. The procedure is typically performed under local anesthesia or sedation. [1]
Eruption Aids: For children and teenagers, specialized dental tools can sometimes help a trapped canine tooth grow into its correct position. [1]
How can you manage an impacted tooth at home?
An impacted tooth needs professional care once symptoms start, but warm saltwater rinses, ice packs and over-the-counter pain relievers can ease discomfort before your appointment. [1] Rinsing with warm saltwater can help keep the area clean, while ice packs applied to the outer jaw can reduce swelling. Over-the-counter pain relievers such as ibuprofen or acetaminophen are often recommended to manage localized pain. [1]
Conclusion
Impacted teeth are a common dental challenge that, when managed correctly, have an excellent long-term outlook. [1] Regular dental checkups are the best defense against complications, as they allow for early detection and proactive care. If you suspect you have an impacted tooth, consulting a dental professional is the first step toward maintaining a healthy, pain-free smile.
Frequently Asked Questions
Can an impacted tooth grow in on its own?
While some teeth may eventually erupt, most impacted teeth, especially wisdom teeth, stay trapped unless treated or surgically removed.
Is impacted tooth surgery painful?
The procedure is performed under local anesthesia or sedation [1] to ensure comfort. Post-operative discomfort is common but manageable with prescribed or over-the-counter medication.
What happens if I ignore an impacted tooth?
Are wisdom teeth the only teeth that get impacted?
No, while wisdom teeth are the most common, canines (cuspids) are the second most likely to be impacted. [2]
Can I prevent a tooth from becoming impacted?
Impaction cannot be prevented as it is usually due to jaw size or genetics, but regular dental cleanings can prevent related complications.
What does an impacted tooth feel like?
Some impacted teeth cause no symptoms at all. Others cause swollen or bleeding gums, jaw pain, bad breath or trouble opening the mouth.
How do dentists find an impacted tooth?
Your dentist will look in your mouth and take X-rays, often a panoramic X-ray of the whole jaw. The X-rays show the tooth's position and whether it is pressing on nearby teeth or nerves.
How long does recovery take after impacted tooth removal?
Most people feel better within a few days, and swelling usually eases within a week. Follow your dentist's care instructions and call if pain gets worse after a few days, which can be a sign of dry socket.
What can I eat after impacted tooth surgery?
Stick to soft, cool foods such as yogurt, soup and mashed potatoes for the first few days. Avoid straws, smoking and crunchy foods, since they can disturb the healing socket.
Can an impacted canine tooth be brought into place?
Often, yes. An oral surgeon can uncover the tooth and attach a small bracket, and braces then slowly guide it into position. Early dental checkups help spot this problem in children.
Related Reading
Dental X-Rays: Types, What They Show, Safety and How Often You Need Them explains the dental X-ray types your dentist uses to find cavities, bone loss and infections, and how safe they are.
References
Cleveland Clinic. Impacted Tooth. Cleveland Clinic. Last updated June 21, 2024. https://my.clevelandclinic.org/health/diseases/impacted-tooth
Alalola B, Farook F, Asiri A, et al. Nationwide prevalence of impacted teeth in Saudi Arabia: a systematic review and meta-analysis. Saudi Dent J. 2026;38(6):74. PMID 42165903. https://doi.org/10.1007/s44445-026-00185-5
Liu W, Liang A, Zhou Y, et al. Association between impacted third molars and external root resorption on adjacent second molars based on cone-beam computed tomography: a systematic review and meta-analysis. BMC Oral Health. 2026;26(1):1619. PMID 42321706. https://doi.org/10.1186/s12903-026-08820-7
de Andrade Tutu JS, de Sousa Lopes Cascaes P, Peralta-Mamani M, et al. Cystic and neoplastic lesions in pericoronal follicles of asymptomatic third molars: a systematic review and meta-analysis. J Oral Maxillofac Surg. 2026;84(10):1662-1674. PMID 42144023. https://doi.org/10.1016/j.joms.2026.04.015
Disclaimer
The information provided in this article is for educational purposes only and should not be considered medical advice. Always consult with a qualified dental professional for diagnosis and treatment of oral health conditions.
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