A tooth that suddenly looks longer, or seems to be rising out of the gum, is a sign that whatever normally holds it firmly in place has changed. In children this is usually the ordinary way baby teeth make room for adult ones. In adults it almost always points to a problem with the bone, the gum, or the bite. The tooth can often still be kept if the cause is found early, which is why the timing of a dental visit matters more than how the tooth looks.
What to Do Right Now
A tooth that looks pushed out right after a fall, a punch, or a sports hit has likely been partly knocked out of its socket. See a dentist or an emergency dental service the same day, because a displaced tooth is easiest to set back while the socket is fresh.
If the tooth was knocked fully out, put it back in its socket at once if you can.1PubMed Central. The Treatment of Anterior Dental Trauma If that isn’t possible, keeping it in a tooth rescue kit or storage liquid can allow it to be replanted up to 24 hours later.2PubMed Central. The Treatment of Anterior Dental Trauma With no kit, keep the tooth in milk or tucked in your cheek and get help quickly.
For replanting, pick the tooth up by the crown, the part that normally shows in the mouth. Avoid touching the root, because the delicate cells on its surface are what let it reattach. If it’s dirty, rinse it briefly with milk or saline, or very gently with water, without scrubbing or using soap. Push it into the socket the right way round, then bite gently on a clean cloth or gauze to hold it there on the way to the dentist. This is for a permanent adult tooth only. A knocked-out baby tooth should not be pushed back in, because it can damage the adult tooth developing beneath it.
A tooth that has gradually started to look longer or feel loose over weeks or months is not usually an emergency. But it usually means bone or gum support is being lost, and that loss doesn’t reverse on its own. Book an appointment within days to a couple of weeks rather than waiting to see if it settles.
Until then, chew on the other side and choose soft foods so the tooth isn’t pushed around. Don’t wiggle it with your tongue or fingers, which can loosen it further. Keep brushing gently around it, because plaque left in place worsens gum problems, and rinse with warm salt water if the gum is sore.
Go today, even without an injury, if you have swelling of the gum, face, or jaw, which can mean infection. The same goes for pus, a bad taste, or fever along with the tooth change, or pain severe enough to stop you sleeping or eating. A tooth so loose it might fall out or be swallowed also can’t wait.
Gum Disease Is the Most Common Adult Cause
Teeth drifting out of position is a common result of moderate to severe periodontitis, the advanced form of gum disease that eats away at the bone around teeth.3PubMed. Pathologic tooth migration One of the most common directions is outward, so the tooth looks longer or sits higher than its neighbours.4PubMed. Pathologic tooth migration
The process starts with plaque, a sticky film of bacteria, building up along the gumline and inflaming the gum. That early stage is called gingivitis. If plaque hardens into tartar, which brushing cannot remove, the inflammation can spread deeper and the gum starts to separate from the tooth, forming pockets. Bacteria in those pockets and the body’s own inflammatory response gradually break down the bone anchoring the root. Once bone is lost it does not grow back by itself, so the tooth keeps moving unless the disease is treated.
This often goes unnoticed because gum disease is usually painless in its early and middle stages, and the bone loss happens below the gum where you can’t see it. Other clues include gums that bleed when you brush or floss, persistent bad breath or a bad taste, gaps opening between teeth or teeth fanning out, and several teeth feeling slightly loose rather than just one.
Diabetes, osteoporosis, and some bone medicines can weaken the bone and raise the chance of loose teeth.5Keith Chertok, DDS. What Is A Loose Tooth Medical Term & What To Do? Heavy tooth grinding can loosen teeth and even cause their loss.6Lane Perio. Bruxism/Teeth Grinding Tell your dentist about any of these conditions, medicines, or grinding habits.
When a Tooth Drifts Because Its Partner Is Missing
Severe overeruption, a tooth drifting out because it has nothing to bite against, often happens after a tooth in the opposite jaw is lost.7PubMed Central. Intrusion of overerupted molars with temporary anchorage devices before prosthetic reconstruction: A case report This usually affects back teeth after an extraction that was never replaced. The drifted tooth can then block a later bridge or implant because it now takes up the space.8PubMed Central. Intrusion of overerupted molars with temporary anchorage devices before prosthetic reconstruction: A case report A tooth is held in its socket by tiny fibres, and bite pressure from the opposing tooth normally balances the slight tendency to creep outward. Without that opposing tooth, nothing resists the movement, so it can keep drifting slowly for years, in severe cases far enough to touch the gum or bone of the empty space opposite.
You can often spot this cause yourself. Look for a gap in the opposite jaw directly across from the tooth. The tooth usually isn’t painful or wobbly, just higher than its neighbours, and the change builds over months or years after the extraction. Food may catch around it, or the bite may feel uneven.
After losing a tooth, ask about replacing it with an implant, bridge, or denture before neighbouring teeth shift. Even a temporary replacement can keep the opposite tooth in place, and regular check-ups let the dentist catch early drifting.
A Knock to the Mouth Can Push a Tooth Partly Out
An angled blow can push a tooth partly out of its socket.9The Journal of Contemporary Dental Practice. Treatment of Extrusive Luxation in Permanent Teeth: Literature Review with Systematic Criteria It often affects the upper front teeth, and both can be hit together.10PubMed Central. Management of extrusive luxation of upper incisors in young permanent teeth: a case report The tooth looks longer, may sit out of line, and often feels loose and tender.
You may notice the tooth hits first when you bite, because it now sits higher than its neighbours. The gum around it often bleeds slightly along the edge where the tooth has pulled away. Even if it seems fine after a few days, it should still be checked, because the nerve can be damaged without obvious signs.
Treatment usually means the dentist gently pushes the tooth back into its socket, typically with numbing. A thin wire or splint then holds it to neighbouring teeth for a few weeks. Follow-up visits check that the nerve inside the tooth survives, and a root canal may be needed later if it dies.
A mouthguard helps protect against these injuries. A custom-fitted guard from a dentist fits best, and it’s worth wearing for contact sports and for activities like cycling or skating.11Dental Associates Of Arlington. How to Save a Tooth That Gets Knocked Out
Shrinking Gums Can Make a Tooth Look Longer
Gum recession, the gum shrinking back from the tooth, is common and becomes more common with age.12ScienceDirect / Journal of Dentistry. Gingival recession-its significance and management More of the tooth shows, so it can look as if it is coming out even when it’s firmly in place. Exposed root can hurt with cold, decay more easily, and look uneven.13ScienceDirect / Journal of Dentistry. Gingival recession-its significance and management Injury and gum disease both play a part in causing it.14ScienceDirect / Journal of Dentistry. Gingival recession-its significance and management
To tell it from a moving tooth, check the edge of the tooth. With shrinking gums it stays level with its neighbours, you may see a yellowish root surface near the gum, and the tooth usually isn’t loose. A tooth that is actually moving sticks out beyond the neighbours’ biting edge.
Brushing with a soft brush and gentle pressure helps protect what’s left. Sensitive toothpaste can ease cold pain, and if the recession is advancing, ask about grafting.
Less Common Causes Your Dentist May Look For
Cysts in the jaw can destroy bone and push nearby teeth out of position.15AL-Kindy College Medical Journal. Inflammatory Odontogenic Cysts Many grow slowly and cause no pain, so the first sign may be nothing more than a tooth that has shifted or a firm bulge in the gum or jaw. As a cyst enlarges it can push roots apart or loosen teeth near it. It often turns up on an X-ray taken for another reason.
Unlike gum disease, a cyst usually affects one area rather than many teeth, and it may cause a painless swelling of the jaw. An unexplained shifting tooth with no gum disease or injury is worth an X-ray.
A wisdom tooth that only partly breaks through can leave a flap of gum that traps food and becomes inflamed, painful, and swollen.16Indonesian Journal of Health Science. Management of pericoronitis associated with tooth 48 using operculectomy17Bay Area OSM. Pericoronitis: Symptoms, Home Care & Treatment In young adults, a sore gum at the back of the mouth may be a wisdom tooth erupting, not a tooth coming out.18Bay Area OSM. Pericoronitis: Symptoms, Home Care & Treatment
What the Dentist Will Check
The dentist checks how much the tooth moves side to side and up and down. They hold it between two instrument handles or fingers and gently push to measure movement in different directions. They may tap it to see if that hurts, which can point to inflammation at the root. Loose teeth are usually graded by how much they move, which helps guide the treatment plan.
Next, a thin measuring probe is slipped along the gum, and pockets deeper than 3 millimetres point to gum disease and bone loss.19Luxe Dental Care. My Tooth Is Coming Out of My Gum: What It Means & What to Do X-rays show how much bone is left around the root.20Luxe Dental Care. My Tooth Is Coming Out of My Gum: What It Means & What to Do After an injury, an X-ray of an extruded tooth shows extra space at the bottom of the socket.21Dentrix Dental Care. Tooth Extrusion: What It Is and What to Do A 3D scan may be used after an injury to check for broken bone around the tooth.22PubMed Central. Experts consensus on management of tooth luxation and avulsion Marking paper then shows if the tooth is being hit too hard when you bite.23Luxe Dental Care. My Tooth Is Coming Out of My Gum: What It Means & What to Do
It helps to tell the dentist when you first noticed the change and whether it’s getting worse, plus any recent blow, fall, or sports injury. Mention teeth lost or extracted, especially opposite this one, and conditions like diabetes, bone medicines, and grinding.
Can the Tooth Be Saved
An overerupted tooth can be pushed back into the bone with braces anchored to small temporary screws in the jaw.24PubMed Central. Intrusion of overerupted molars with temporary anchorage devices before prosthetic reconstruction: A case report Back teeth moved this way typically go back about 3 to 4 millimetres.25PubMed Central. Intrusion of an overerupted molar using orthodontic miniscrew implant: A preprosthodontic therapy This can avoid grinding down healthy tooth or surgery.26PubMed Central. Intrusion of overerupted molars with temporary anchorage devices before prosthetic reconstruction: A case report When bone has been lost, gentler forces must be used.27PubMed. Intrusion of overerupted periodontally compromised posterior teeth using orthodontic mini implants: A mechanobiological finite element study The alternative is shortening the tooth, often with a root canal and a crown.28RUDN Journal of Medicine. Alternative treatment of over-erupted teeth
Gum disease is treated by deep cleaning and sometimes surgery to rebuild support. The deep cleaning, called scaling and root planing, removes plaque and tartar from below the gumline and smooths the root surface so the gum can reattach. Your dentist rechecks the pocket depths after several weeks to see whether it worked. Surgery to clean deeper pockets or rebuild lost bone is considered only if pockets remain deep. With severe injury or major bone loss, removal and an implant may be needed.29Dental Asensio. Dental Extrusion ✔️ Causes, Symptoms & Treatment To keep the problem from coming back, plan on regular cleanings every few months after gum treatment, careful daily brushing and flossing, and a night guard if you grind.
When It’s a Child’s Tooth
An adult tooth growing underneath dissolves the baby tooth’s roots, so the baby tooth loosens and falls out on its own.30Little Smiles Pediatric Dentistry. My Tooth Is Coming Out of My Gum: What It Means & What to Do Children usually begin losing baby teeth at around six, with the lower front teeth often among the first to loosen. Because the adult tooth pushes upward, it can look as if the baby tooth is rising. Baby teeth generally fall out in roughly the order they came in, though timing varies from child to child. A bluish fluid-filled bump over an incoming tooth is usually harmless and goes away once the tooth comes through.31Clinical Pediatric Emergency Medicine. Oropharyngeal Lesions and Trauma in Children
For a wobbly baby tooth, let the child wiggle it gently and don’t force it out. A little bleeding when it falls out is normal; press with gauze.
Call the dentist for an injury to any tooth, especially a new adult front tooth, or when an adult tooth is coming in behind a baby tooth that won’t fall out. Swelling, pus, or fever also need a call, as does a loose tooth when no adult tooth is expected at that age.