By Dr. Manish Pandey, BDS, Dental Surgeon
Featured image: AI-generated illustration for educational purposes only. It shows a general dental examination, not a patient with this injury.
A tooth concussion injury can happen when a tooth is knocked but stays in its normal position. The tooth may feel sore when touched or when biting, even though it is not visibly loose or broken. Pain after a blow is worth a dental assessment: a dentist must check for fractures, displacement and other injuries that may not be obvious at home.
What is a tooth concussion injury?
In dental-trauma terminology, concussion is an injury to the tissues supporting a tooth without abnormal loosening or displacement. The tooth is typically tender to tapping or touch. That description is not a home diagnosis. A tooth that has moved, become loose, cracked, or changed the bite may have a different injury and needs its own treatment plan.
What should you do after a tooth is knocked?
Contact a dentist promptly and explain when and how the injury happened. Until you are assessed, avoid biting hard food with the sore tooth, keep the mouth clean with gentle brushing, and do not keep pressing the tooth to test it. If there is a visible chip, keep any fragment and tell the dentist. Follow the clinician’s advice about pain relief according to the patient’s age, medical history and medicines.
Seek urgent dental care if a tooth is displaced, very loose, broken, or missing. Heavy bleeding, a suspected jaw injury, difficulty breathing or swallowing, or symptoms of a head injury call for urgent medical attention. A knocked-out baby tooth must not be pushed back into its socket; management differs from that of a permanent tooth.
How will a dentist examine the tooth?
The dentist may check the tooth’s position, mobility, tenderness, bite and surrounding soft tissues. They may take an X-ray when clinically indicated to look for a root or bone injury and establish a baseline. In a child, identifying whether the injured tooth is primary or permanent matters. Early pulp-sensibility responses can be unreliable after trauma, so follow-up may be needed even when the first examination seems reassuring.
Does tooth concussion need treatment?
A confirmed concussion often needs observation rather than repositioning or splinting. The dentist may advise a softer diet for comfort and give specific follow-up instructions. Do not assume that persistent pain means the tooth needs a root canal; the decision depends on later findings, not soreness alone. Equally, do not skip review just because pain improves quickly. A tooth can change after the initial visit.
What changes should you watch for?
Report worsening pain, swelling, a gum pimple, a tooth that darkens, increasing looseness or a new problem with the bite. These signs can have different explanations and need examination. Keep any follow-up appointment the dentist recommends so healing and tooth vitality can be reassessed. Children should have the developing teeth and bite considered in the follow-up plan.
Common questions
Can a tooth be injured without looking broken?
Yes. Tenderness after a knock can occur without a visible fracture. Only a dental examination can distinguish concussion from other trauma.
Should I stop brushing the sore tooth?
Usually no. Clean the area gently, but avoid repeatedly testing or forcefully biting on the tooth. Ask the dentist for individual instructions if there is bleeding or another injury.
When can I eat normally again?
That depends on the examination and symptoms. Follow the treating dentist’s advice and avoid hard biting on the injured tooth while it is tender.
References
- International Association of Dental Traumatology: Guidelines for traumatic dental injuries
- American Academy of Pediatric Dentistry: IADT injury guidelines in the 2025–26 Reference Manual
This article provides general dental education, not a diagnosis or a substitute for an examination. A clinician should assess any tooth injury and advise on treatment and follow-up.