Dental implants are one of the most reliable procedures in dentistry. Long-term studies consistently put ten-year survival somewhere between 95 and 98 per cent, and that figure is genuinely earned. But an average hides a lot. The same implant, placed by the same surgeon, does not carry the same odds in every mouth, and the factors that move the number are mostly things you already know about and some you can change. This guide sets out what actually matters, with honest figures, and what a good clinic should be telling you before you book.
The risk factors, ranked by how much they matter
| Factor | Effect on implant success | Can you change it? |
|---|---|---|
| Smoking | Roughly doubles failure risk; worst in the upper jaw and in grafted sites | Yes, and quickly |
| Active or untreated gum disease | Two to three times the risk of late failure through peri-implantitis | Yes, treat it first |
| Poorly controlled diabetes | Slower healing, higher infection risk; well-controlled diabetes is close to normal | Yes, through control |
| Poor daily hygiene and no maintenance visits | The leading cause of failure after year five | Yes, entirely |
| Bruxism (grinding) | Mostly mechanical: screw loosening, crown fracture rather than lost implants | Manageable with a night guard |
| Bone quantity and quality | Significant, but usually solvable by grafting or implant choice | Clinically, yes |
| Head and neck radiotherapy | Meaningfully reduced success, needs specialist planning | No |
| IV bisphosphonates and some bone medications | Small but serious risk of jaw healing complications | No, needs medical review |
| Age | Essentially none. Health matters, birth year does not | Not applicable |
Notice what is at the top. The two biggest levers, smoking and gum health, are both patient-side and both changeable. That is unusually good news in medicine.
Smoking: the single biggest modifiable factor
Nicotine constricts blood vessels, and an implant integrates by growing bone into a surface that depends on blood supply. Reduce the supply and you slow the process at the exact moment it matters most. Smoke also impairs the immune response in the gum tissue around the implant, which is why smokers fare worse in the long run as well as the short.
The published picture is consistent: failure rates in smokers run at roughly double those in non-smokers, and the gap widens in the upper jaw where bone is softer, and in any site that has been grafted. If you have a bone graft or sinus lift in the plan, smoking is not a background concern, it is the main clinical variable.
Practically, the window that helps most is roughly two weeks before surgery and eight weeks after. That is when the clot forms, the graft revascularises and the bone starts bonding to the implant surface. Stopping for that period is a genuinely different proposition from quitting for life, and it is worth framing it that way. Vaping is not a free pass: nicotine is nicotine as far as your blood vessels are concerned, and the suction is a dry socket risk after extractions.
It is also worth knowing that many clinics exclude or reduce guarantee cover for smokers, as we cover in our guarantee and warranty guide.
Gum disease: the reason implants fail after year five
Early failures, in the first months, are usually about integration. Late failures, years down the line, are almost always peri-implantitis: inflammation and progressive bone loss around an implant that had integrated perfectly well. It is the exact same disease process that took out your natural teeth in the first place, which is why a history of periodontitis is such a strong predictor.
The important point for anyone travelling: gum disease must be treated before implants are placed, not after. Placing implants into an actively inflamed mouth is putting new posts into infected ground. Any clinic that skips periodontal assessment because you are only in town for a week is cutting the wrong corner. Our guide to gum health before Turkey teeth covers how to get this sorted with your UK dentist before you fly, which is usually the cheapest and fastest route.
Diabetes: control matters far more than diagnosis
Diabetes on its own is not a barrier to implants, and this is one of the most persistent myths we hear. What matters is glycaemic control. Patients with well-managed diabetes, broadly an HbA1c in the low sevens or better, show implant success rates close to those of non-diabetic patients. Patients with poorly controlled diabetes heal more slowly, have higher infection rates and higher failure rates.
So the useful conversation with your GP or diabetes team is not “can I have implants”, it is “where is my HbA1c and can we improve it before surgery”. Bring a recent reading to your consultation. A clinic that asks for it is doing its job; a clinic that never mentions diabetes at all is not.
Grinding, medication and the rest
Bruxism rarely causes an implant to be lost, but it causes a lot of what patients experience as failure: fractured crowns, chipped porcelain, loosened abutment screws. Implants have no periodontal ligament, so they do not have the natural shock absorption a real tooth has, and the force goes straight into the restoration. A night guard is cheap, and skipping it is a common guarantee exclusion.
Bisphosphonates and related bone medications matter, and they are under-declared. Oral bisphosphonates for osteoporosis carry a low risk. Intravenous bisphosphonates and denosumab, particularly at oncology doses, carry a small but serious risk of medication-related osteonecrosis of the jaw. Declare every bone medication, past and present, even if you stopped years ago.
Head and neck radiotherapy reduces blood supply to the jaw and lowers implant success meaningfully. It does not rule implants out, but it makes them a specialist case.
Age is not a risk factor. Healthy patients in their seventies and eighties do very well. The only firm age rule is at the other end: implants should not be placed until jaw growth is complete, generally late teens.
What the clinic controls
Patient factors are only half the picture. Surgical and planning factors matter just as much, and this is what you are actually paying for:
- A CBCT scan, not just a panoramic X-ray, so bone volume and nerve position are known in three dimensions before anything is drilled
- Correct implant selection for your bone type, and a named brand with certificates, as covered in our certificate verification guide
- Not overloading too early. Immediate loading is excellent in the right case and a risk in the wrong one, which our same-day implants guide explains
- Sensible implant numbers. Whether four, six or eight implants suits your jaw is a clinical decision, not a price decision. Our All-on-4 vs All-on-6 vs 3-on-6 decision tree works through it
- A restoration you can actually clean. A full-arch bridge with no access underneath is a peri-implantitis case waiting to happen
A realistic pre-treatment checklist
- Get a periodontal assessment and any needed hygienist treatment done in the UK first
- If you smoke, stop two weeks before and stay stopped for eight weeks after
- If you are diabetic, get a current HbA1c and share it with the clinic
- List every medication, especially bone medications, blood thinners and steroids
- Declare any history of radiotherapy to the head or neck
- Ask whether a night guard is recommended, and budget for it
- Book the follow-up maintenance schedule before you leave, not afterwards
Then keep it going. Implants need the same hygienist care as teeth, ideally twice a year, plus daily interdental cleaning around each fixture. Our UK dentist handover guide explains how to set that up so your NHS or private dentist has everything they need to maintain the work.
Frequently asked questions
What is the actual success rate of dental implants?
Around 95 to 98 per cent survival at ten years in healthy patients, which makes implants one of the most predictable procedures in dentistry. Smoking, untreated gum disease and poorly controlled diabetes are the factors most likely to pull an individual case below that.
Can I have dental implants if I smoke?
Yes, most clinics will still treat you, but your failure risk is roughly double and your guarantee may be limited. Stopping for two weeks before and eight weeks after surgery covers the period that matters most and materially improves your odds.
Can diabetics have dental implants?
Yes. Well-controlled diabetes gives success rates close to non-diabetic patients. Poorly controlled diabetes is the problem, not the diagnosis, so bring a recent HbA1c to your consultation and improve control before surgery where you can.
Am I too old for dental implants?
Almost certainly not. There is no upper age limit; general health, bone volume and healing capacity are what count. Patients in their seventies and eighties routinely have excellent outcomes.
What is peri-implantitis?
Inflammation and bone loss in the gum and bone around an implant, driven by plaque, and the main cause of implant failure years after placement. It is largely preventable with daily interdental cleaning and regular hygienist visits.
Will grinding my teeth destroy my implants?
Rarely the implants themselves, but grinding causes fractured crowns and loosened screws. A night guard is a small cost that protects a large investment, and not wearing one after being advised to is a common guarantee exclusion.
Not sure whether your medical history rules you in or out? Send us your photos and medical details for a free treatment plan and we will give you an honest assessment, including if implants are not the right answer for you.
