Most dentistry today is bonded: tooth-colored fillings, onlays, veneers, and the resin cement under many crowns. Bonding means the restoration is attached to your tooth and seals it. Done well, it’s some of the most conservative work we can do.
But a bond lives in your mouth, not in our office. We control the hour you spend in our chair. Your habits control the rest of the year. This guide is about that second part.
- Large reviews find the two main reasons tooth-colored fillings fail are new decay at the edges and fracture.
- In one major review, failure rates in people at high risk of decay were about double the overall rate.
- Both are driven largely by daily habits: how often you snack or sip, what you chew on, and how well you clean the edges.
- We do our part with isolation, sealing and choosing the right restoration. The rest is a partnership.
How bonded work usually fails
A 2014 review of tooth-colored fillings in back teeth pooled long-term studies and found an average failure rate of about 1.8% a year over five years and 2.4% a year over ten. The main reasons were decay and fracture. In patients at high risk of decay, the rates were 3.2% and 4.6%, roughly double.
That second number is the point. The material is the same in every mouth. What changes is the mouth around it. A bonded filling doesn’t decay, but the tooth at its edge still can. And a filling that is asked to crack ice or open packages will eventually lose that argument.
The habits that matter most
How often you snack or sip
Every time you eat or drink something sugary, the bacteria on your teeth make acid. The American Dental Association’s warning is about grazing: snacking all day, especially on sugary foods and drinks, raises your risk of cavities. A soda sipped over an afternoon is harder on your teeth than the same soda with lunch. Keep sweets and sweet drinks to mealtimes, and drink water in between.
Acidic drinks
Acid doesn’t need sugar to do damage. Sodas (diet included), sports and energy drinks, and lemon water can soften enamel over time. Acid reflux does the same thing from the inside: the ADA notes that reflux can wear away enamel, and that your dentist may notice your fillings have changed. We wrote more about sugar, acid and your teeth.
What you chew on
Ice, pen caps, fingernails. The ADA lists chewing ice and nail biting among the habits that chip teeth, and notes that sometimes it’s the tooth or a filling that breaks, not the ice. Using your teeth to open packages or hold things belongs on the same list.
How you clean, especially at the edges
The edge where a restoration meets your tooth is where decay starts again, and brushing alone misses the sides. Clean between your teeth once a day with floss or small interdental brushes, and brush gently: the ADA warns that brushing too hard can damage teeth and irritate gums.
A dry mouth
Saliva is your teeth’s built-in defense. It carries minerals that help keep teeth strong and keeps harmful germs in check. Hundreds of medicines can reduce it, including common ones for blood pressure, depression and bladder control. If your mouth feels dry, tell us. The National Institute of Dental and Craniofacial Research suggests drinking plenty of water and chewing sugar-free gum.
Clenching
Heavy clenching or grinding can chip or crack teeth and fillings. But wear isn’t always grinding. Acid and some medications are common causes too, and a night guard won’t fix those. Our guide to tooth wear covers how we tell them apart.
Skipping checkups
A small gap or stain at the edge of a filling can often be handled early. Left alone, it becomes decay under the restoration, and the next repair is bigger. Regular exams are where we catch it.
We control the hour you spend in our chair. Your habits control the rest of the year.
What we do in the office
- We keep the tooth dry while we bond. Bonding is unforgiving about moisture: a speck of saliva at the wrong moment weakens it. We use an isolation system with continuous suction on every procedure.
- We seal freshly prepared teeth right away. When a tooth is shaped for an onlay or crown, we seal the newly exposed inner layer with resin first, a step called immediate dentin sealing, before the restoration is bonded.
- We choose the restoration for the tooth. Large fillings on the chewing surfaces of molars don’t hold up well, so when a cavity is big, we usually recommend an onlay instead.
- We match prevention to your risk. If you have active decay, we add fluoride varnish to your plan. We recommend CariFree products, and for patients who’d rather avoid fluoride, nano-hydroxyapatite toothpaste is a promising option.
- We tell you where you stand. A risk assessment tells us how often we should see you and what to watch.
What we need from you
None of this is complicated. It just has to happen on the days we’re not there:
- Keep sugary and acidic drinks to mealtimes, with water in between.
- Don’t chew ice, pens or nails, and don’t use your teeth as tools.
- Clean between your teeth once a day, and brush gently.
- Tell us about a dry mouth, reflux or new medications.
- Keep your checkups, so small problems stay small.
Myth vs fact
- Myth: Tooth-colored fillings just don’t last. Fact: In large reviews, most are still in service after ten years. Failures cluster in mouths with active decay and heavy forces.
- Myth: If it doesn’t hurt, the filling is fine. Fact: Decay at the edge of a filling is often painless until it’s large. That’s why checkups matter.
When to see a dentist
Come in if a filling feels rough or sharp, food starts catching at its edge, you see a dark line around it, a tooth turns sensitive to cold or sweets, or a piece chips. Early repairs are usually smaller repairs.
Summary
Bonded dentistry is only as durable as the mouth it lives in. We isolate, seal and choose the restoration carefully. Your habits decide the rest: keep sugar and acid to mealtimes, don’t chew hard objects, clean the edges daily, and keep your visits. That partnership is what makes good work last.