What Your Dentist Does First
When you come in with a broken tooth, your dentist starts by examining what kind of break you have. They look at whether only the hard outer layer (enamel) is cracked, or if the yellowish layer under it (dentin) is exposed. They want to know if the break goes all the way to the nerve. They'll gently clean the area and look for bleeding (which means the nerve is exposed) or clear fluid (which means it's probably still okay).
Your dentist takes X-rays to see the exact break line, check if the root is broken, and make sure your jaw bone is intact. They check how loose the tooth is—a solid tooth is good, but an overly loose tooth might mean a root fracture. They ask you about pain: simple chips don't usually hurt much unless your mouth rubs against sharp edges.
Deeper breaks that expose dentin cause sensitivity to air and touch. If the nerve is exposed, you'll have significant pain.
Temporary Sealing Materials
Your broken tooth needs to be sealed as soon as possible to stop bacteria from getting inside and damaging the nerve. Your dentist will use a temporary material—this is just to hold you over for 2-4 weeks while they monitor the tooth, not the permanent fix. The most common temporary materials are glass ionomer cement (a tooth-colored material that releases fluoride to strengthen surrounding teeth and fights bacteria) and temporary acrylic (an off-white material that hardens by chemical reaction).
Glass ionomer is excellent because it hardens in 2-4 minutes and bonds directly to your tooth without needing any prep. Your dentist will clean the exposed area with a mild acid (polyacrylic acid) to prepare it—this actually improves how well the glass ionomer sticks by 40-60%. They'll carefully dry it (not too much) and press the material onto the exposed area.
If your break is in a visible spot and you're worried about appearance, your dentist might use tooth-colored temporary composite resin instead, which hardens under a special blue light in 40-60 seconds. There's also zinc oxide cement (a very gentle material), though it sets slowly (takes overnight if you're in a hurry) and isn't as durable in your back teeth. Your dentist picks whichever material is best for your specific situation.
Managing Pain and Sensitivity
When dentin is exposed, the tiny tubes running through it get opened up, and this directly stimulates the nerve—that's why exposed dentin is so sensitive. Your dentist can apply special desensitizing treatments. Potassium oxalate solutions work within 24 hours by reducing nerve sensitivity by 25-40%. Fluoride gels (the same thing that strengthens normal teeth) seal those tiny tubes and reduce sensitivity by 80-90%, with protection lasting 3-4 weeks.
Sometimes your dentist will use bioactive materials (like calcium-releasing cements) that actually release calcium into the tooth structure around the exposed area. These provide 2-3 weeks of pain relief. You'll also get over-the-counter pain medication instructions: ibuprofen (400-600mg) three times a day for 5-7 days reduces both pain and inflammation better than acetaminophen, though acetaminophen works fine if you can't take ibuprofen.
Building Your Temporary Restoration
Your dentist carefully shapes the temporary restoration to be comfortable and not cause problems. They'll shape the front surface to match your tooth roughly—this helps you feel less self-conscious and protects soft tissues from sharp edges. But they won't build it up too much, because excessive buildup means more plaque sticks to it and your gum gets irritated.
The biting surface is especially tricky. Your dentist makes it slightly lower than your original tooth position (about 0.5-1mm) to prevent the break from being stressed every time you chew. If they made it too short, the tooth would be under-protected and more easily reinjured. But if they left it in full contact with the opposite tooth, chewing forces would flex the break open and keep your nerve inflamed.
If you have a tooth fragment that broke off and you saved it, there's good news: your dentist can often reattach it using strong dental adhesive. This is like putting it back together with superglue for teeth. If they use about 2mm of overlap with bonding resin at the break line, they can restore 90-95% of the original tooth strength. This is ideal if the break is recent and the fragment is clean.
Caring for Your Temporary Restoration
Brush gently around your temporary restoration with a soft toothbrush (soft enough that the bristles bend easily). Don't use whitening toothpaste because it contains abrasive particles that can wear away the temporary material. After 48 hours without cleaning, bacteria and plaque build up on your temporary restoration—so daily gentle brushing is important.
You can floss, but do it very gently to avoid pulling off the temporary restoration. If flossing bothers you, use a small interdental brush instead—it's actually better at removing bacteria (30-40% more effective) than floss, especially on temporary restorations. Avoid crossing directly through the broken area with floss until your dentist puts in the permanent restoration.
Watch what you eat. Soft foods like yogurt, applesauce, mashed potatoes, and smoothies are fine and won't stress your tooth. Avoid the broken tooth side when you chew. Don't eat hard foods (nuts, hard candy, ice), don't chew sticky foods (taffy, beef jerky, dried fruit), and avoid very hot foods (over 140°F) or very cold foods (below 40°F) because temperature extremes make exposed dentin hurt. Room temperature meals are ideal during this period.
How Long the Temporary Restoration Stays
Your temporary restoration should stay in place for 2-4 weeks minimum. This gives your tooth's nerve time to settle down from the trauma and tells you whether the nerve is still alive. At your 4-week checkup, your dentist tests whether the tooth is still vital (alive). They might apply ice to your tooth—if you feel the cold, the nerve is alive. If you don't feel it after 60 seconds, the nerve probably died.
During this waiting period, your dentist's main goal is watching for complications. They'll take X-rays at 4 weeks looking for three specific things: the root dissolving from the inside out (resorption), the nerve space filling in (which usually means healing), or signs that the nerve died. Your tooth might change color—if it turns yellowish or light gray, that's usually good (old blood inside the tooth reabsorbing). If it turns gray or black, the nerve probably died. A pink tooth is rare and serious (it means root resorption is happening).
When Your Temporary Restoration Fails
Temporary restorations sometimes come loose or break during the 2-4 week waiting period. If part of it separates and bacteria gets in, you need to get it fixed or replaced right away. Your dentist cleans off the old material gently, cleans and etches the tooth surface, and puts on new temporary material. If the material has deteriorated a lot (more than 20% of the surface), they'll usually replace the whole thing rather than just repair the weak spot.
Glass ionomer slowly wears away at about 0.1-0.2mm per week (faster than you'd notice), but it usually holds the seal well. Acrylic temporary restorations are more durable but might yellow slightly over 2-4 weeks. Either way, your temporary restoration is temporary—your dentist will remove it when it's time to put in your permanent restoration.
Moving to Your Permanent Fix
Once your dentist confirms your nerve is still alive (or decides what to do if it's not), they remove the temporary restoration. They use small ultrasonic tools to gently break it away without damaging the remaining tooth. They have to remove every last bit of temporary material—if even small particles stay on the tooth, they block the permanent bonding material and your new restoration might fail.
Your dentist cleans everything with a mild polishing paste, looks very carefully to make sure the tooth is completely clean, and then they're ready to apply permanent restoration. If your tooth has been waiting a few weeks, they'll etch (apply acid to) the tooth surface fresh to prepare it properly for bonding.
Related reading: Oral Thrush and Risk Assessment for Dental Disease - Know Your.
Conclusion
Learn more: Understanding temporary versus permanent restorations, Managing tooth sensitivity, or What to expect during tooth repair.
> Key Takeaway: Temporary restoration of your broken tooth buys time for inflammation to settle and your dentist to assess whether your nerve is okay—this waiting period is crucial for planning the best permanent fix.