When Your Dental Work Fails, What Happens Next

Crowns that keep breaking, implants that never felt right, veneers that do not match. Why reconstructive dentistry fails, and why the first step is a diagnosis rather than a redo.

Medically reviewed by Dr. Kunal Lal, BDS, MS, DDS
Second OpinionsFull-Mouth ReconstructionRestorative Dentistry
When Your Dental Work Fails, What Happens Next

Patients arrive at a prosthodontic practice for a reason, and one of the most common is that something has already been tried and did not hold.

A crown that has come off three times. An implant that never felt right. Veneers that were the wrong shape from the day they were fitted. A bridge that broke within two years of a considerable amount of money.

This is not usually a story about a bad dentist

Complex reconstruction is genuinely difficult. That is precisely why it is a recognised specialty with three additional years of training attached to it.

Most failed work was done carefully by someone competent. What went wrong is more often a diagnosis that missed something, or a plan that treated the symptom.

The common reasons things fail

Decay at the margin. The junction where a crown meets the tooth is where crowns succeed or fail. A gap there collects plaque, and decay underneath a crown is hard to detect until it is advanced.

A fracture underneath. A tooth that has lost most of its structure flexes under load. Enough flexing splits it, and the crown is then sitting on a broken foundation.

The bite. If the way your jaws close concentrates force onto one or two restorations, those restorations will keep breaking no matter how well they are made. This is the failure most often missed, because the evidence is not on the tooth that broke.

The gum. Implants and crowns fail through the tissue around them. Untreated gum disease undermines good work steadily and quietly.

Design rather than execution. Sometimes the work was made well and was never going to look right, because proportion, edge position and tooth display were not decided deliberately before anything was prepared.

Why the first appointment should not be treatment

The useful first step is a diagnosis: an examination, x-rays or a scan where they are needed, and an assessment of the bite as a whole rather than the failing restoration on its own.

Sometimes the answer is small. A single crown remade properly on a sound tooth, and the problem is over.

Sometimes the answer is that the individual restoration was never the problem, and treating it again is what guarantees a fourth visit.

What you are entitled to expect

An explanation you understand of what went wrong. The options, including the cheaper one and what you give up by choosing it. A written plan with the sequence, the stages and the cost, before anything begins.

If you have had work that failed and nobody has told you why, that question is worth bringing to a consultation.

Frequently asked questions

Can failed dental work be fixed? +

Usually, yes. What matters is establishing why it failed first. Decay at the margin, a fracture in the tooth underneath, a bite that overloads the restoration and gum disease around it are different problems with different solutions, and they are not distinguishable by looking at the restoration alone.

Should I go back to the dentist who did the work? +

Often that is the right first call, particularly if the work is recent and under warranty. A second opinion is worth seeking when the same problem has recurred more than once, or when you were never given an explanation you understood.

What should I bring to a second opinion appointment? +

Previous x-rays, the treatment plan, and the invoices if you have them. Working out why something failed is most of the job, and it is far faster with the history in front of us.

Will I have to have everything redone? +

Not necessarily. Some failures are local and can be repaired. Others are symptoms of a bite problem, in which case treating the single failing restoration is what guarantees it happens again.

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Have questions about your smile?

Our team in New York is happy to help. New patients are always welcome.