Most dental treatment goes smoothly. Fillings settle, crowns last for years, and implants quietly do their job. It would not be honest, though, to promise that every treatment, every time, turns out perfectly. Dentistry works with living tissue, and living tissue does not always behave the same way twice. At ArtSmiles we would rather have the open conversation up front than pretend complications never happen. This article looks honestly at what can go wrong in dental treatment, why it happens, how an experienced clinician lowers the odds, and what a good clinic does to put things right.
No treatment is ever one hundred percent guaranteed
It is worth saying plainly: no responsible dentist can promise a flawless result every single time, and the research bears that out. Modern dental implants have a ten year survival rate of around 95 percent in recent reviews, which is excellent, but it is not 100 percent (Clinical Oral Investigations, 2024). Root canal treatment succeeds in roughly 86 to 93 percent of cases over the long term (Iqbal & Kim, 2007). Those are high, reassuring numbers. They also leave a small share of cases where things do not go to plan, and honesty means naming that rather than hiding it.
In fact, a guarantee of a perfect outcome is a warning sign, not a comfort. Biology does not allow certainty, and a clinic that promises it is overpromising.
Why things sometimes go wrong
When a treatment does not behave as hoped, it is usually for reasons that have little to do with anyone cutting corners. Every mouth heals differently. Bone density, gum health, how quickly you heal, whether you grind your teeth at night, smoking, diabetes and other medical conditions all shape the result. A filling in a heavily decayed tooth asks far more of that tooth than a small one. An implant placed in soft bone has a harder job than one in dense bone.
Then there is time and wear. Teeth, fillings, crowns and implants all live in a working mouth that chews, clenches and ages. Even a flawless result has to survive years of daily use. None of this makes a problem inevitable. It simply means the outcome depends on biology and habits as much as on the work itself.
What can go wrong, treatment by treatment
None of the following is common, and all of it is usually manageable when it is caught early. Knowing the possibilities just helps you go in with clear eyes.
Fillings
A filling can be sensitive for a while afterwards, and occasionally that sensitivity lingers and needs adjusting. A large filling can chip, or in time let decay creep back underneath, which is exactly why regular reviews matter. More on how we approach dental fillings.
Crowns, veneers and bridges
These are precise pieces of work. Now and then a crown or veneer needs remaking if the fit or the bite is not quite right, and bonded work can come loose and need re-cementing. Night grinding is a common culprit, which is why we check for it before and after. More on crowns and bridges.
Root canals
Root canal treatment clears infection from inside the tooth, and most treated teeth serve well for years. Sometimes infection persists or returns, and the tooth needs retreatment or, occasionally, removal. It remains one of the most reliable ways to save a natural tooth, as we explain in what a root canal is and whether it is safe.
Extractions and surgery
After a tooth comes out, the socket can occasionally develop a painful dry socket, or heal more slowly than expected. These are uncomfortable but usually settle quickly with prompt care.
Implants and All-on-4
Implants need to fuse to the bone, a process called osseointegration (the bone growing onto and gripping the implant). The great majority do, but a small number do not take and need to be removed and replaced. Later on, the gum and bone around an implant can become inflamed, a condition called peri-implantitis (gum and bone inflammation around an implant), which needs early management. Good habits and regular reviews keep the odds in your favour. See our single implants and All-on-X pages.
Gum treatment
Gum disease can usually be controlled but not always cured outright, and it can flare again if maintenance lapses. Ongoing care is part of the deal rather than a sign that something failed.
How experience changes the odds
Here is the part that does not get said often enough: skill and experience genuinely matter. They do not make any dentist immune to complications, but they shift the odds. An experienced clinician plans more thoroughly, reads the warning signs earlier, selects cases carefully, and stays calm when something unexpected arises. The difference often shows not in the easy cases, which go well in most hands, but in the difficult ones, and in how quickly a problem is spotted and solved.
This is also why dentistry is best thought of as a service, not a product off a shelf. Two people can have the same treatment on paper and have quite different experiences depending on planning, materials and the hands doing the work. We wrote more about why that matters when comparing clinics in our guide to going overseas for dental work.
How a good clinic puts things right
What separates a good experience from a bad one is often not whether a problem happens, but what happens next. A clinic that stands behind its work will review you, explain plainly what is going on, and sort it out without fuss. At ArtSmiles, our treatment is backed by our warranty, and the way we work is set out in our philosophy. If something needs attention, you know who is responsible and where to go.
Continuity is the quiet hero here. The team that did the work already knows your history, holds your records and scans, and can act quickly. That is far harder to arrange when the people who treated you are a long way away.
Questions worth asking before you start
Good answers to these are reassuring. Vague ones tell you something too.
Ask what the realistic success rate is for your specific treatment, and what the alternatives are.
Ask what happens, and what it costs, if the work needs adjusting or redoing later.
Ask to see the dentist's own before and after cases, and about their experience with your treatment.
Ask who looks after your follow-up and any emergencies.
Ask how the result is protected, and get it in writing.
When to speak up after treatment
If something does not feel right after dental work, the worst thing you can do is wait and hope. Get in touch. A new crown that feels high, a bite that feels off after a filling, a crown or filling that has come loose, ongoing pain or swelling, or bleeding that will not settle are all worth a prompt call. Caught early, most of these are simpler to put right. If it is urgent, you can reach us through our emergency dentist page.
References
Naseri, M., et al. (2024). How far can we go? A 20-year meta-analysis of dental implant survival rates. Clinical Oral Investigations. springer.com
Iqbal, M. K., & Kim, S. (2007). A review of factors influencing treatment planning decisions of single-tooth implants versus preserving natural teeth with nonsurgical endodontic therapy. Journal of Endodontics. ncbi.nlm.nih.gov
Australian Dental Association. (n.d.). Your dental health. teeth.org.au
A note on this article
This article is for general educational purposes only and is not personal clinical advice. Individual circumstances and outcomes vary. Please see a registered dental practitioner for an assessment of your situation.
The cover image for this article is AI-generated and is not a clinical photograph of a real patient or case.
Frequently asked questions
Do dental treatments ever fail?
Occasionally, yes. Success rates for modern treatments are high, with implants surviving around 95 percent at ten years and root canals succeeding in roughly 86 to 93 percent of cases, but no treatment is guaranteed every time. Most problems, when they do happen, are manageable if they are picked up early, which is why reviews and good aftercare matter as much as the treatment itself.
Does a more experienced dentist mean fewer problems?
Experience shifts the odds in your favour rather than removing risk entirely. A seasoned clinician plans carefully, spots warning signs sooner, and handles the unexpected calmly. The difference tends to show up in the harder cases and in how quickly a problem is recognised and resolved, which is why looking at a dentist's experience and their own case results is worthwhile.
What should I do if my dental work feels wrong?
Do not wait it out. Ongoing pain, swelling, a loose or high-feeling crown or filling, a bite that feels off, or bleeding that will not settle are all worth a prompt call. Caught early, most issues are far simpler to put right. Your treating clinic, which holds your records and history, is the best placed to help quickly.
Can a dentist guarantee my treatment will work?
No honest dentist can promise a perfect outcome every time, because biology does not allow that kind of certainty. What a good clinic can offer is careful planning, realistic information about success rates, and a clear plan, backed in writing, for what happens if something needs attention later. A guarantee of perfection is a reason for caution, not reassurance.
Written by Dr. Cristian Dunker, BDSc, MBA.
Medically reviewed by Dr. Cristian Dunker.