It depends not on the diagnosis alone but on how well controlled the diabetes is
- In most patients with diabetes an implant is possible. Far more often the disease lengthens healing and packs the check-ups closer together than it rules out a restoration on an implant.
- What decides whether a dental implant with diabetes is an option is the stability of the HbA1c results - glycated haemoglobin, the average blood sugar over the last three months - not the name of the diagnosis.
- There is no HbA1c cut-off below which the procedure is always safe. The risk rises gradually, and prediabetes is sometimes a worse situation than diabetes under control.
- The second criterion is the gums. Bleeding when brushing and loose teeth move the procedure behind periodontal treatment.
- This article covers both types of diabetes, although most of the data relate to type 2. Periodontal treatment itself, autoimmune diseases and the state after radiotherapy have criteria of their own.
What does a raised blood sugar change in healing?
A raised blood sugar changes above all what happens around the implant over the years that follow. About the first weeks the studies speak less consistently. The wound heals more slowly, and bone rebuilds less well, when glucose stays high for a long time.
The proportion of implants that stay in the bone in people with diabetes is nevertheless high: in reviews from recent years usually more than nine in ten. With poor control it is sometimes lower, in one review 85-94%. The reviews give no other estimate they agree on. The difference shows up elsewhere: in the bone level at the neck of the implant, and in how inflamed the mucosa around it is. That is exactly why a dental implant with diabetes is judged one way over a year and another way over a decade.
In people with well controlled type 2 diabetes, bone at the neck of the implant was lost at almost the same rate as in people without diabetes: the excess over people without diabetes came to 0.4 mm and did not differ significantly from zero. In those poorly controlled it reached 1.8 mm. What was pooled here were observational studies lasting at least a year, and the synthesis covered type 2 diabetes and prediabetes.
The most interesting result, though, concerns prediabetes. In the same synthesis the excess bone loss in these people came to 1.2 mm, against 0.4 mm in people with diabetes under control. Without a direct comparison of the two groups, the authors write only this much: prediabetes may leave the tissues in a worse state than well controlled diabetes. In another review prediabetes had no effect on implant loss itself.
All of this comes from observation, not from studies with random allocation to groups, so it shows that one goes together with the other, not that one causes the other. In these syntheses diabetes figures as a risk indicator for the more severe form of inflammation around the implant, the one with bone loss; for the milder inflammation of the mucosa alone no association was shown. That does not mean that controlling diabetes achieves nothing: it achieves something, it just does not buy a guarantee.
Four pieces of information you need before the consultation
For the conversation about whether a dental implant with diabetes is an option, prepare four items:
- Your most recent HbA1c result together with the date it was measured. A number remembered from a conversation is not enough.
- Two or three of your most recent fasting glucose readings, and if you use a sensor, the report from the last two weeks.
- A full list of the medicines you take, including those unrelated to diabetes.
- The date of your last appointment with the diabetes specialist, and whether the treatment has changed in the last six months.
Anyone who brings these four items has a better chance of leaving the first appointment with a decision rather than with a request for documents.
Qualification card: three groups of information and what each of them changes
Go through the card row by row and tick off what you already have checked.
| ☐ | What you check | What it changes in the plan |
|---|---|---|
| ☐ General health | Whether the results have been stable over the last few months. Whether the diabetes treatment was changed in the last six months, and whether there has been time to assess the effect | A recent change of dose or recent swings: waiting, not refusal |
| ☐ Local condition | Bleeding of the gums when brushing and on probing, pocket depth, the amount of plaque, untreated cavities | A poor assessment: a hygiene plan and a date for re-assessment, a delay of weeks |
| ☐ The plan for check-ups after the procedure | Whether you will come to supportive care appointments more often than you would without a chronic disease | Weighs the most over ten years; the part that depends mainly on the patient |
Other general conditions are assessed separately - weakened bone is covered in the article on implants in weakened bones. The last row is sometimes taken lightly. Observations show that people who attend regularly less often have inflammation of the tissues around the implant and less often lose an implant. They do not prove that attendance alone is what decides.
In everyday clinical practice at Modern Dental & Orthodontics (Klinika MDO) we meet the situation in which a patient has good laboratory results and untreated gum inflammation. The order is then the reverse of what they expect: the gums first, then dental implants.
Why are the gums and hygiene assessed before the procedure?
Because the tissues around an implant are more prone to inflammation than the tissues around your own teeth, regardless of diabetes. Close to half of patients with implants have inflammation of the mucosa around the implant, and the deeper inflammation with bone loss - that is, peri-implantitis - about one patient in five. That is what came out of a large synthesis of studies, most of them carried out in academic centres.
Inflammation of the mucosa alone reverses: once the plaque is removed and the risk factors are brought under control, the inflammation usually settles. In not everyone, though, does the bleeding stop completely. With the inflammation that involves bone loss things are not that good: rebuilding the lost bone is sometimes possible, but it is not predictable, and the realistic goal of treatment is sometimes to halt the disease rather than to cure it fully. That is exactly what the more frequent check-ups are for: to catch the first state before it turns into the second.
A past periodontal disease is at the same time a stronger warning signal than diabetes itself: in the syntheses of risk factors it appears with both forms of inflammation around the implant, and active disease raises the risk more clearly than a past one. Smoking works in a similar way and adds to both.
Plaque control is assessed here as a separate criterion. What counts is not a declaration but what can be seen during the examination. If that picture is poor before the procedure, there is no reason to assume it will improve after it. A dental implant with diabetes is all the less a solution that forgives neglected hygiene.
How may the schedule of treatment and check-ups change?
The placement protocol itself is now heavily standardised, and diabetes rarely changes it. What shifts instead are the decisions around it: the timing, the staging and what follows.
Preparation is needed before the procedure: treating gum inflammation, clearing sites of decay, sometimes waiting until the results settle. This usually takes from a few weeks to a few months.
After the procedure the wait for the prosthetic restoration is usually longer. The implant is fusing with the bone then, and how long it takes to heal after a dental implant is sometimes planned more cautiously with diabetes: immediate loading, that is fitting the crown straight after placement, is used less often. Exactly how much longer the wait has to be, the studies do not answer: there are few comparisons.
The most lasting change concerns the check-ups: a dental implant with diabetes requires them for years. The European guideline on the prevention and treatment of diseases of the tissues around implants says outright that prevention begins as early as the planning stage of the procedure and continues for the whole time the patient wears the restoration, within an organised programme of supportive care.
How close together? Two American societies, one for implant dentistry and one for periodontology, agreed an expert opinion on this - no one has carried out a review of studies on the question. They propose an interval of three to four months in high-risk patients, listing among them people with poorly controlled diabetes, and of five to six months in low-risk patients, where the tissues are stable. The interval is reassessed after the first year.
The programme means day-to-day care of the implants at home, including what to avoid with dental implants, and appointments at which inflammation can be caught before it takes bone away. Giving it up is associated with clearly more frequent late complications.
When is a dental implant with diabetes deferred, and when does it give way to another restoration?
Deferral is not refusal. It is a decision about order.
The arguments for waiting are:
- recent marked swings in blood sugar, no current HbA1c result, or a change of diabetes treatment a few weeks ago whose effect has not yet been assessed,
- active periodontitis with bleeding and deep pockets,
- an untreated site of infection in the area of the planned implant.
In each of these situations it is better to wait a few months: it improves the conditions for the procedure, and haste changes nothing for the better. Smoking does not defer the procedure by itself, but it adds to each of these conditions. If you have already been turned down at two practices, ask which of these points it was about - an open-ended refusal and a deferral until things improve sound alike and mean different things.
It is a different matter when several risk factors are present at once and none of them can be brought under control. A review devoted to prognosis in treatment planning puts it plainly: where risk factors are uncontrolled, full cure is sometimes an unattainable goal, and the sensible goal becomes keeping the disease at low activity. It is then worth considering a restoration that is easier to correct when the tissues are in poor condition: a denture, or a bridge instead of an implant.
Antibiotic prophylaxis and an antiseptic mouthrinse are used in almost every described implant protocol in people with diabetes. No one, however, has examined separately what they achieve in this group: the authors of a review devoted to the subject write outright that no publication has studied the effect of anti-infective treatment on implant success in diabetes. Routine is therefore not evidence here, and the decision rests with the clinician carrying out the procedure.
Diabetes alone changes the schedule of treatment, not whether it is possible
No qualification criterion reads “do you have diabetes”. They all ask how the disease is being managed and what state the tissues are in. Where implants and diabetes meet, the diagnosis in the notes changes above all the order and the pace of treatment. What narrows the list of options is only the risk factors that cannot be brought under control. The first step needs no appointment: check the date of your most recent HbA1c result and gather the four pieces of information listed above.
Consult your case with an expert and get your treatment plan
Frequently asked questions
What HbA1c do you need in order to get an implant?
The literature sets no cut-off below which the procedure is always safe and above which it is always impossible. The risk rises gradually with the result. In any case the practice does not read a single number but the trend across several measurements: the question is “is it stable, and since when”, not “what is it today”. The state of the gums and the plan for check-ups matter just as much.
Does diabetes increase the risk of losing an implant?
Where the disease is well managed, the risk is close to that in people without diabetes. With poorly controlled type 2 diabetes an implant has a worse prognosis, although in reviews from recent years usually more than nine implants in ten stay in the bone in people with diabetes. One review gives 85-94% for this group, but that is a narrative synthesis, without a meta-analysis; the reviews give no other estimate they agree on.
Do you have to change your medicines before the procedure?
That is decided by the doctor managing the diabetes, not by the dentist and not by this article. The form of treatment on its own, tablets or insulin, does not settle qualification; what settles it is control of the disease. The patient’s job is to bring a full list of the preparations they take, together with the date of the last diabetes review. No medicine is stopped or altered on your own before a dental procedure, a diabetes medicine included. Changes to treatment are set by the doctor who manages it, and by no one else.
How do you prepare for the day of the procedure itself?
It is worth mentioning the diabetes as early as booking, and asking for a morning slot. Before the appointment you eat normally, unless the doctor managing your diabetes has advised otherwise, and you bring your glucose meter or sensor reader with you. Medicines are taken according to your existing instructions, without changes made on your own. The telephone number for your diabetes specialist is useful too. It is worth having something sweet with you. Weakness, shaking or sweating during the procedure must be reported straight away: that is a signal to stop and check the blood sugar, not one to sit out.
How often should an implant be checked with diabetes, and for how long?
Experts propose an interval of three to four months for high-risk patients, including people with poorly controlled diabetes; in low-risk patients, where the tissues are stable, it is sometimes lengthened, and after the first year it is reassessed. The programme lasts as long as the implant is in use. A signal to come in earlier is bleeding when brushing at that site, swelling of the gum, or an unpleasant smell that persists despite hygiene.
Is a denture sometimes a safer alternative?
Sometimes, although it is not in principle a worse or a better solution. Where several risk factors are uncontrolled at once, a removable restoration or a bridge is easier to correct and does not require bone to heal around an implant; the decision depends on the number of missing teeth, the state of the remaining ones, and on whether the condition of the tissues can be improved.
What is healing like in the first two weeks in a patient with diabetes?
Much as in other patients, only slower. Swelling and tenderness usually ease after a few days. With a raised blood sugar the wound closes over a longer time, so during the first two weeks three things matter more than usual: gentle hygiene of the operated area, avoiding smoking, and keeping to regular meals and glucose measurements.
Read more:
- Dental implants in Warsaw Wola
- Dental implants and osteoporosis — is placement possible with weakened bones?
- Peri-implantitis — inflammation around a dental implant. Symptoms, treatment, prevention
- Does getting a dental implant hurt? An honest account of pain, anaesthesia and healing
- Bone augmentation before an implant — when is it necessary and what types are available?
Content and liability disclaimer
This article is informational and educational in nature and does not constitute medical advice, a diagnosis or a therapeutic recommendation — it does not replace a consultation with a specialist. If you are experiencing symptoms, have doubts or are facing a decision about treatment, consult a dentist. The methods described and the data cited are general in nature. The results of scientific studies relate to populations, not to an individual patient. The course and outcome of therapy depend on the individual clinical situation and may vary between patients. No information contained in this article constitutes a guarantee of result. The content has been prepared with due care, based on publicly available medical knowledge and the scientific publications indicated in the Sources section. We do not advise taking or refraining from any health-related action solely on the basis of the content of this article, without prior consultation with a doctor.
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