How Long Does Tooth Bonding Last, and What Sets the Price?

Maybe a front tooth you had bonded years ago now looks duller at the edge than the tooth beside it. Or you're weighing tooth bonding for a gap and want to know how long it will hold before you pay for it. The answer to both starts with what bonding is made of and where on the tooth it sits.

What is tooth bonding made of, and why does it wear?

Composite bonding is a tooth-colored resin. Picture a plastic packed with tiny particles of glass or ceramic, called filler. The plastic holds it together and lets us shape it on your tooth, while the filler gives it strength and helps it hold a shine.

To make it stick, we lightly roughen the enamel with an acid gel so the resin can lock into it. A curing light then hardens it in seconds. It's usually done in one visit, with no lab, and often with no drilling or numbing.

That mix is softer than enamel, the hard outer layer of your natural tooth, and three things follow from that.

The shine fades. Chewing and brushing slowly wear down the plastic at the surface, and tiny filler particles loosen and fall out. The surface turns slightly rough, and a rough surface scatters light, so it looks dull next to smooth enamel.

Stain has somewhere to go. The plastic soaks up a little water, and pigment from coffee, tea, red wine and tobacco comes in with it. The tiny pits in a rough surface hold stain too, which is why bonding can pick up color that brushing won't lift.

Edges take the hits. Bonding holds on by gripping the tooth's surface, not by wrapping around it. On the biting edge of a front tooth, every bite of an apple pushes on that thin layer, which is where chips start.

How long does tooth bonding last?

There isn't one number, because the job the bonding does changes how long it lasts. A 2015 review of 17 clinical studies of front-tooth bonding found that fracture was the most common reason it failed. When bonding was placed to change how teeth looked, failures more often came from color, shape and surface stain. Across those studies, somewhere between 0 and about 4 bonded front teeth in every 100 failed each year, depending on the study.

A 2015 analysis that pooled 21 clinical trials put numbers on location. Small fillings on the sides of front teeth, tucked away from the bite, were still working at 10 years about 95% of the time. Repairs that rebuilt a broken corner or biting edge came in at about 90%. When those edge repairs had to be replaced, the main reason was that the bonding broke.

Those figures carry three cautions. First, they come from planned clinical trials, and 18 of the 21 began before 2001, using the materials of that time. Second, the lead author works for a company that makes bonding resin. Third, neither figure covers bonding spread over the whole front of a tooth.

Your own result depends on your bite, your habits and how much tooth the bonding replaces. The habits that shorten its life are the ones that load a thin edge. Think of grinding or clenching at night, chewing ice, pens or fingernails, and opening packages with your teeth. Coffee, tea, red wine and smoking matter too, but they affect color rather than strength.

A bonded tooth that has gone dull can often be polished again. It's worth having the edges looked at during your cleanings, so a small chip gets caught while it's still small.

Can old bonding be repaired, or does it have to be redone?

Repair is where bonding has the advantage over porcelain, because fresh composite bonds to old composite. If a corner chips, we can often clean and roughen the area and add new resin where it broke, without starting over.

Is a patch as good as a redo? A German university study of the records for 8,542 tooth-colored fillings in front and back teeth found that repaired ones lasted as long as replacements. A repair also keeps more of your natural tooth, because the old bonding doesn't have to be ground away first.

Porcelain veneers work differently, because they are fired in a furnace at a dental lab, so matching porcelain can't be added in the mouth. A badly chipped veneer often goes back to the lab to be remade. The tradeoff runs the other way on wear, though: porcelain is harder, keeps its shine and resists stain far better than resin. I compared the two side by side in bonding vs. veneers.

What sets the price of tooth bonding?

I can't give you a fair number before I've seen the tooth, because the price follows the work, and four things move it.

How many surfaces the bonding covers. A front tooth has five sides: the front, the back, the two sides facing its neighbors, and the biting edge. The American Dental Association's billing codes for tooth-colored fillings and repairs on front teeth are sorted by how many of those surfaces get restored. A small chip on one corner might involve two surfaces, while rebuilding a larger broken edge can involve four.

How many teeth. Each tooth is its own piece of work, shaded and shaped to match the ones beside it. Closing a gap can mean adding resin to the teeth on both sides of it.

A small repair or full coverage. Fixing one chipped corner is a short job. Covering the whole front of several teeth takes far longer, because each tooth is built up in layers and shaped by hand. For a change that size, we can plan it with Digital Smile Design. You see a digital preview of the new shape before treatment starts.

A repair or a change in looks. Insurance plans often treat a broken tooth differently from work done for appearance. We're not under contract with every company, and that changes the billing, not whether we can see you. Call us and we'll check your plan.

Bonding costs less up front than porcelain partly because there's no lab work involved. The flip side is that it tends to need upkeep sooner. After the exam, you'll get the plan in writing with the cost of each part before anything is scheduled. Because bonding for looks is elective, a larger plan can usually be done in stages. If spreading the cost helps, we work with CareCredit and Cherry, and both are explained on our financing page.

Is bonding the right fix for your tooth?

Bonding makes the most sense for a chip, a small gap or a single uneven edge, where a patch later is quick. For bigger changes across many teeth, the wear and upkeep add up, and porcelain deserves a look.

If you've got a chip, a gap, or old bonding that has lost its shine, call us at (412) 462-3095 or use our contact page. We'll look at the tooth, tell you what it would take, and put the numbers in writing.