Short answer. A poking wire is usually the end of the main archwire sliding out past the last back tooth as the teeth straighten, or a loose tie wire. Push it flat with the eraser end of a pencil, cover it with a pea-sized ball of orthodontic wax, and call the office to have it trimmed. Do not cut it yourself unless the office tells you to. Call the same day if the wire keeps cutting the cheek or causes bleeding that wax cannot control.
By Rodrigo F. Viecilli, DDS, PhD, board-certified orthodontist at Limestone Hills Orthodontics in Austin, TX, who has treated more than 5,000 patients.
Why braces wires start poking
At each adjustment the orthodontist trims or bends the end of the wire behind the last tube. A wire that pokes between visits usually means the teeth have moved since then:
- The teeth lined up. A wire threaded through crowded teeth zigzags from bracket to bracket. As the teeth line up, that path gets shorter and the extra wire slides out the back, past the last molar. Closing gaps between teeth does the same.
- The wire is the flexible kind. The nickel-titanium wires used early in treatment spring back instead of holding a bend, so their ends are hard to bend over and slide out more often than the stiffer steel wires used later.
- The wire shifted to one side. When the wire slides around the arch, one end gets shorter and the other gets longer.
- A tie wire came loose. Some braces have thin steel ties or hooks twisted around a bracket, and the twisted end can work loose and point at the lip or cheek.
- Something broke. A loose bracket or band lets a section of wire move; see what to do about a broken bracket.
- Food bent it. Hard and sticky foods bend light wires; see foods to avoid with braces.
How to fix a poking wire at home
- Find it. Look in a mirror with a flashlight. Note whether it is the end of the main wire behind the last tooth, a thin tie wire, or a broken piece.
- Push it flat. Use the eraser end of a pencil to press the end against the tooth. Tuck a loose tie wire back toward the bracket the same way.
- Cover it. If it will not stay flat, dry the area with a tissue, roll a pea-sized ball of orthodontic wax, and press it firmly over the end. Replace it after meals. A cotton ball works for a short time if you have no wax.
- Soothe the sore. Rinse with half a teaspoon of salt dissolved in a glass of warm water, then spit it out.
- Call the office. Most repairs at Limestone Hills take 15 to 20 minutes.
Should you cut the wire yourself?
Not unless the office tells you to. A cut piece can fall toward the throat, and a wire cut in the wrong place can change how the teeth move. Only if the wire is dangerously poking and the office cannot be reached should clean nail clippers be used, as a last resort: place gauze behind the wire to catch the piece, clip only the extra wire behind the last tooth, cover the cut end with wax and call the office. Do not pull the wire out, and do not bend the main wire with fingers or tools, which can move teeth the wrong way.
Cheek sores from braces
Small sores are common, mostly in the first weeks while the cheeks get used to the brackets. In a study of 161 orthodontic patients, 76% reported small wounds from their fixed braces and 2.5% suffered badly from them. In a study of 79 adults, all but 4 had a sore at some point and 83% called the problem minor, yet 47% named sores from the braces as the most annoying part of treatment. In a 2025 trial that followed 70 patients through their first month in braces, the inside of the cheek was the most frequent spot.
Wax over the rubbing spot is the main treatment, with warm salt-water rinses for comfort. Citrus, salsa and hot sauce can sting a fresh sore. Mouth ulcers usually clear up within a week or two once the rubbing stops; the NHS advises seeing a dentist or doctor about any ulcer that lasts longer than 3 weeks. More comfort measures are in how to stop braces pain.
When to call the same day
| Situation | What to do |
|---|---|
| A wire end is poking and wax holds | Call during office hours to book a trim |
| The wire keeps cutting the cheek or causes bleeding that wax cannot control | Call the same day |
| The wire end is caught in the cheek | Ease the cheek off the end, cover it with wax and call. Do not pull on the wire |
| A piece of wire broke off and is loose in the mouth | Spit it out carefully, keep it and call |
| A small piece of wire was swallowed | Call your doctor and the office; a sharp piece may need an X-ray. With coughing, choking, chest pain or trouble breathing, call 911 |
| Swelling of the jaw, face or neck with a fever | Get care the same day |
What can wait and what cannot is also covered on the orthodontic emergency page, and what normal soreness feels like is in do braces hurt.
Preventing poking wires
- Keep a case of orthodontic wax in your backpack, car or bag.
- Avoid hard and sticky foods that bend wires and break brackets; the everyday list is in what can you eat with braces.
- Mention any wire end that feels long at your adjustment visit.
- Wear a mouthguard for contact sports; see mouthguards for braces.
Poking wire questions, answered
How do I stop a braces wire from poking my cheek?
Push the end flat against the tooth with the eraser end of a pencil, then cover it with a pea-sized ball of orthodontic wax. Rinse with warm salt water if a sore has started, and call the office to have the wire trimmed.
Is a poking braces wire an emergency?
Usually not. If wax keeps it from rubbing, call during office hours to book a trim. Call the same day if the wire keeps cutting the cheek or causes bleeding that wax cannot control.
Why does my braces wire keep poking out the back?
Because the teeth are moving. As crowded teeth line up and gaps close, the wire’s path through the brackets gets shorter and the extra slides out past the last molar, most often with the flexible wires used early in treatment. A trim fixes it, and it can happen again until the teeth settle.
What can I use if I do not have orthodontic wax?
A small piece of cotton ball pressed over the wire end works for a few hours. Replace it often and get orthodontic wax as soon as you can; pharmacies carry it in the oral care aisle.
How long does a cheek sore from braces take to heal?
Usually a week or two once the rubbing stops. Keep wax over the spot, rinse with warm salt water, and avoid spicy and acidic foods while it heals. See a dentist or doctor about a sore that lasts longer than 3 weeks, keeps getting worse, or comes with swelling or fever.
Limestone Hills Orthodontics is on RM 2222 in Northwest Austin. The first visit is free for new patients who have not been in orthodontic treatment in the last 12 months. Book a free orthodontic consultation or call (512) 720-6399.
Sources. Kvam E, Gjerdet NR, Bondevik O. Traumatic ulcers and pain during orthodontic treatment. Community Dent Oral Epidemiol. 1987;15(2):104-107. doi:10.1111/j.1600-0528.1987.tb00493.x. Kvam E, Bondevik O, Gjerdet NR. Traumatic ulcers and pain in adults during orthodontic treatment. Community Dent Oral Epidemiol. 1989;17(3):154-157. doi:10.1111/j.1600-0528.1989.tb00012.x. Somprajob C, Auychai P, Chavanavesh J, Suttamanatwong S. Effectiveness of curcumin mouthwash in preventing traumatic ulcers in orthodontic patients. BMC Oral Health. 2025;25(1):1725. doi:10.1186/s12903-025-07141-5. NHS. Mouth ulcers. Page last reviewed 11 March 2024. Home-care steps and repair times match the Limestone Hills Orthodontics emergency and broken-bracket guidance, Austin, TX.
