Smoking after a dental implant: is 48 hours enough?

What the studies found

Two systematic reviews have pooled the research on smoking and dental implants.

• Implant loss overall. A 2020 review of 23 studies compared people who smoked more than 20 cigarettes a day with non-smokers. Implant loss was about 2.5 times as likely per implant¹, and about 4 times as likely per patient. The risk rose with the number of cigarettes a day, and no safe number was shown.
• Early loss. Early failure means an implant that does not fuse with the bone and is lost during healing. A 2024 review of 32 studies, covering 59,246 implants in 14,115 patients, looked at this. In its implant-level analysis (21 cohorts) the odds ratio was about 2.6²; in its patient-level analysis (30 cohorts) it was about 2. A cohort is a group of patients followed over time. An odds ratio is not directly a "times as likely" figure. The authors also note that it is uncertain how large the effect of smoking is.

What these figures do not tell you

• They show an association, not proof of cause. Both reviews pooled observational studies, in which people were not assigned to smoke or not.
• They did not test stopping. Neither review studied what happens when someone stops smoking, so they cannot say whether stopping brings the risk back to a non-smoker's level.
• They are not a prediction for one person. They compare groups of people. They give no single absolute risk for a smoker, and we do not turn them into one.

Smoking is one of several factors linked to implant loss; a history of gum disease and clenching are others. How dental implant treatment is planned around them is explained on its own page, and for a whole jaw on the All-on-4 page.

Is there evidence for the 48-hour rule?

Advice not to smoke for the first 48 hours after surgery is common, and an earlier version of this article repeated it. We have found no study that tests it. The reviews above compared smokers with non-smokers and counted cigarettes a day. Neither measured a smoke-free period of any length, before or after surgery.

So we have found no evidence that smoking again on the third day is safe, or that the risk changes at 48 hours. An implant takes months, not days, to fuse with the bone, and the early-failure review links smoking to losses during that healing phase². A rule that covers only the first two days leaves most of that time uncovered.

When to stop, and for how long

• Tell your dentist that you smoke, and how much. It is part of the assessment before any implant, together with gum disease, diabetes, clenching and the medicines you take.
• Agree the stopping period before surgery. Your dentist tells you when to stop before surgery and how long to stay smoke-free afterwards. Smoking again after that period has not been shown to be safe. We ask patients not to smoke during the healing period, and the period for your treatment is written into your aftercare instructions.
• Cutting down is not the same as stopping. In the 2020 review the risk was higher with more cigarettes a day, but no number was shown to be safe.
• E-cigarettes and heated tobacco. The reviews on this page are about cigarettes. We have no reviewed evidence on e-cigarettes or heated tobacco and implants, so we cannot say they are safer. Ask your dentist before you use them during healing.
• Help to stop. Nicotine patches and gum are used to help people stop smoking; the reviews on this page did not study them with implants. If you want to stop for good, your family doctor can tell you what support is available. Tell your dentist what you use.

Once the implant is in use

After healing, regular checks keep track of the implant. When the tooth on the implant is completed, an X-ray and gum measurements around the implant are taken as a baseline³. Later changes are compared with them. The European Federation of Periodontology's guideline calls for a care programme with regular assessment⁴ once implants are in use. Your review interval is set by your own risk, so tell your dentist at each check whether you still smoke.

If you have already smoked, and when to contact a dentist

If you smoked in the first days after surgery, do not panic. A higher risk across a group of people does not mean that your implant will fail. Stop now, keep to your aftercare instructions and let your dentist know.

Contact your dentist if you notice any of these signs:

• Pain or swelling that increases after the third day, or bleeding that does not stop
• A bad taste, a bad smell or discharge around the implant
• The gum over the implant opens
• The implant, or a temporary tooth on it, feels loose
• A fever, or feeling generally unwell

Emergencies. Difficulty breathing or swallowing, rapidly spreading swelling of the face or neck, high fever or swelling around the eye are serious signs. If you have any of them, do not wait for the clinic's reply. Go to the nearest emergency department or call 112.

Frequently asked questions