A sentence that sometimes comes up during an implant consultation goes like this: “before we place the implant, we will need to lift the sinus”. The patient usually nods. The questions only arrive on the way home. Is it surgery? Will I feel anything? How many days will I lose? And is there really no other way?
One thing at a time. A sinus lift, or maxillary sinus floor elevation, is a procedure that restores bone height beneath the sinus so that an implant can be anchored there. It is performed under local anaesthesia, usually takes from several dozen minutes to about an hour and a half, and the first two to three days are the most noticeable. The rebuilt bone matures over the following few months. In some patients a sinus lift can be avoided — thanks to short implants or to tilted implants in a full-arch restoration.
What this text does not answer is whether the procedure is necessary in your case — that decision is made by the clinician on the basis of the scan and the prosthetic plan. It answers what comes immediately afterwards: what will happen step by step, and why the post-operative instructions are quite so unusual.
Maxillary sinus floor elevation — why bone is lacking precisely here
The maxillary sinus is a paired, air-filled space inside the bone of the upper jaw, lined from within by a thin mucous membrane (the Schneiderian membrane). In an adult its floor lies directly above the roots of the posterior teeth — the premolars and molars. In places only a few tenths of a millimetre of bone separates them from the sinus floor.
After the loss of a posterior tooth, two processes begin at once. The alveolar ridge — the part of the bone in which the roots were seated — resorbs from below, because it is no longer loaded during chewing. From above, the sinus slowly increases in volume: this is pneumatisation. The layer of bone between them becomes ever thinner, and the process runs for years without symptoms.
The consequence is prosaic: when a patient returns a few years later having decided on an implant, there is sometimes too little bone left beneath the sinus for the implant to anchor in. That is when sinus floor elevation is proposed. The surgeon lifts the Schneiderian membrane upwards and fills the space created beneath it with a bone substitute material, which over the following months remodels into the patient’s own bone. The name is therefore literal: a sinus lift raises the floor of the sinus, it does not interfere with its interior.
Two things are worth separating straight away. A sinus lift is one particular case of bone reconstruction, not a synonym for bone reconstruction in general — we wrote about the types of bone augmentation and grafting materials in a separate article. There we also discuss the criteria for choosing between the open variant, through a window in the lateral wall of the sinus, and the closed variant, performed from the ridge — together with the bone height thresholds that determine that choice.
Before a sinus lift — the medicines and conditions you must disclose
From this point on we address you directly, because the rest of the text consists of specific recommendations. Let us start with the conversation that weighs more than all the remaining preparation: the one about medicines. This is not a formality on a questionnaire, but a few groups of drugs that genuinely change the treatment plan.
Medicines for osteoporosis and oncology drugs acting on bone. Bisphosphonates — alendronate, risedronate, ibandronate, zoledronic acid — and denosumab are associated with a risk of medication-related osteonecrosis of the jaw (MRONJ), a complication in which the bone at the surgical site stops healing properly. For bisphosphonates this association is better documented; for denosumab it remains a subject of research, and the complication itself is rare. Mention these medicines also if you took them several years ago and no longer take them: bisphosphonates remain in bone for years. And do not stop them on your own — pausing the drug before a dental procedure does not reduce the risk of osteonecrosis, and in the case of denosumab it risks a rapid fall in bone density and vertebral fractures.
Blood-thinning medicines. Acenocoumarol, warfarin, rivaroxaban, apixaban, dabigatran, as well as acetylsalicylic acid and clopidogrel. Any modification is decided by the treating clinician in consultation with the doctor who prescribed the drug.
Steroids, immunosuppressive drugs, previous chemotherapy or radiotherapy of the head and neck, poorly controlled diabetes. Each of these situations affects healing and requires treatment to be planned separately.
The simplest approach is to photograph all the packaging and show it at the consultation. A list reconstructed from memory is almost always incomplete.
The sinus that has to be treated first
In patients with a history of sinus problems the same question keeps coming back: “I have a runny nose all the time, can I have this done at all?”. The answer is usually: you can, but not now.
The maxillary sinus drains its secretions through a narrow ostium into the nasal cavity. If that route is blocked, everything that ends up in the sinus stays inside. That is why the patency of the ostium is assessed before the procedure, and active sinusitis, purulent discharge or a flare-up of allergic rhinitis are reasons to postpone the appointment — not to abandon treatment.
One distinction is crucial, however. The mere presence of a lesion in the sinus — a retention cyst visible on the scan, for example — usually does not preclude the procedure. What matters is whether something is blocking the outflow of secretions: a polyp closing the ostium, a marked deviation of the nasal septum or recurrent sinusitis may indicate a need for an ENT consultation before the sinus lift. This does not complicate treatment; it removes from it one of the more common causes of trouble.
Preparation and the day of the procedure
Before a sinus lift under local anaesthesia you do not need to fast — on the contrary, it is better to eat a normal meal. Fasting applies only when sedation is planned; in that case the clinician gives detailed instructions.
Sedation, incidentally, is the answer to the question most often asked half under one’s breath: “can I sleep through it?”. Where dental anxiety is severe, inhalation or intravenous sedation may be available. It does not replace local anaesthesia, but it changes the experience of the procedure. You then need to come with someone accompanying you and to plan a day without driving.
After a procedure under local anaesthesia alone, driving is usually possible, although it is more sensible to plan an unhurried journey home. Start cold compresses as soon as you leave the surgery, not several hours later — they work while the swelling is still building up.
Plan a quieter routine for two to three days. Swelling of the cheek can be clearly visible, so if you have important meetings during that time it is easier to move the procedure than the meetings. Discuss sick leave at the appointment — it depends on the extent of the procedure and on the kind of work you do.
Sinus lift step by step — the procedure seen from the chair
It all begins before the procedure itself — with cone-beam computed tomography (CBCT). On the scan the surgeon assesses bone height, the thickness of the sinus lining, the presence of bony septa and the patency of the ostium through which the sinus drains into the nose. Assessing risk factors before the procedure is the basic tool for limiting complications.
The procedure is performed under local anaesthesia: the patient is awake, breathes independently and can talk to the team. The anaesthesia covers the operated area and the palate — in extent it resembles anaesthesia for the removal of a molar, only maintained for longer.
Once the anaesthesia has taken effect, the surgeon reflects the gum, exposing the lateral wall of the upper jaw. In that wall a small window is created — today usually with a piezoelectric instrument, which cuts bone but does not damage soft tissue. This is the moment at which the patient hears the sound change and feels vibration, but no pain.
Then the most precise part begins: detaching the Schneiderian membrane from the bony floor of the sinus and lifting it upwards with special blunt-ended instruments. The membrane is about as thick as tissue paper, and damage to it — perforation — is the intra-operative event most often described with the lateral window technique. The risk increases with a thin membrane, with bony septa inside the sinus and in people who smoke, among other factors. A perforation does not mean the procedure is abandoned: in most cases it is repaired straight away, during the same appointment.
The surgeon fills the space beneath the lifted membrane with a bone substitute material. If the remaining bone provides sufficient stability, the implant can be placed at the same time. In a long-term follow-up of patients with a severely atrophic upper jaw, roughly nineteen out of twenty such implants were still in place after six years, and about three in four after twelve. The less bone there was at the outset, the poorer the outcome: with the thinnest layer, roughly half of the implants survived after ten years. Cigarette smoking proved to be an important risk factor for failure. If there is too little bone, the implant is placed at a second stage.
Finally the gum is repositioned and sutured. The length of the procedure depends above all on the anatomy of the sinus, the number of sites being restored and whether implants are placed simultaneously.
What does the patient feel during it? Pressure, vibration, the sound of the instruments, a stream of water and the suction at work. Not pain. Pain appears only once the anaesthesia wears off, and it is pain that is the real subject of the days that follow. From the chair, then, a sinus lift resembles a prolonged tooth extraction rather than surgery in the everyday sense of the word.
The first 24 hours and the first week — a recovery timeline after a sinus lift
Healing after sinus floor elevation follows a surprisingly repeatable course. In studies assessing symptoms reported by patients themselves, pain after the lateral window procedure requires painkillers, but patients manage it at home.
| Period | What typically happens | What to do |
| First 24 hours | Increasing swelling of the cheek, a feeling of a “blocked” nose on the operated side, possible traces of blood in nasal discharge | Cold compresses in cycles, medicines as instructed, sleeping with the head raised |
| Days 2–3 | Peak of swelling and discomfort; in some patients bruising appears on the cheek | Continued medication, a restful daily routine, chewing on the opposite side |
| Days 4–7 | Swelling begins to subside, the bruise changes colour, nasal discharge may still be tinged | Gentle hygiene avoiding the wound, return to lighter activity |
| Weeks 2–4 | Suture removal, return to normal activity, resolution of sinus symptoms | Gradual widening of the diet and return to full hygiene |
| Month 4 onwards | Remodelling of the material into bone, proceeding without symptoms | Radiographic review and planning of the next stage of treatment |
The pressure-related instructions described in the next section apply throughout this whole period, from the first day, and not only within a selected window of time.
Two things surprise patients most often. First: the swelling is not at its greatest immediately after the procedure, but on the second and third day — swelling that increases within that window does not mean something has gone wrong. Second: the feeling of a blocked nose on the operated side results from swelling of the sinus lining and also falls within the typical course, provided it is not accompanied by fever or purulent discharge.
The severity of symptoms also depends on the technique: in a comparative study the lateral window approach was associated with more intense pain and greater swelling than the less invasive osseodensification.
The last row of the table is often the most misleading, because bone healing gives no signals — it does not hurt, it does not swell, it cannot be seen in the mirror. Suture removal ends the noticeable stage, not the healing. In a study in which patients were allocated at random, the graft maturation time in the two-stage approach was shortened from eight months to five without any loss of bone quality, although the effect on long-term implant survival remains unclear.
Pressure-related instructions: what you must not do, and why
This is the part that distinguishes recovery after a sinus lift from healing after any other procedure in the mouth. Beneath the lifted Schneiderian membrane lies fresh, not yet consolidated material. Above it — a closed space filled with air. Every sudden surge of pressure in the airways is transmitted to that space and acts on the membrane as it would on a drum skin.
Hence the instructions which, without an explanation, sound absurd:
- Do not blow your nose. Blowing the nose is the strongest surge of pressure a person generates in this region in everyday life. It can detach the lifted membrane and displace the material. Clear a runny nose gently, by drawing the discharge in, or wipe the nose without pinching the nostrils.
- Sneeze with your mouth open. An open mouth is an escape route for the air. Sneezing with the mouth closed directs the entire pressure impulse into the nose and sinuses.
- Do not fly or dive. In both situations the ambient pressure changes and the sinus has to equalise it. A freshly operated sinus is not prepared for that.
- Put aside wind instruments, balloons and inflatable mattresses. Playing the trumpet or the clarinet means sustaining raised pressure for many minutes — mechanically it is almost the same as blowing your nose on a loop.
- Do not smoke. This is the only risk factor on this list over which you have full control. In smokers the sinus lining tends to be thinner and tears more easily during the procedure, and impaired blood supply slows the healing of the wound. Smoking also increases the risk of failure of the implant itself.
- Do not drink through a straw. A recommendation traditionally given after procedures in the mouth, adopted as a precaution.
- Give up intense exercise, heavy lifting and head-down positions. Lifting weights involves reflex straining, which raises pressure throughout the airways.
How long these instructions apply is determined by your clinician — for flying and diving the period is often longer than for the other points.
In our dental practice at Modern Dental & Orthodontics (Klinika MDO) we observe that problems after sinus floor elevation more often result from breaking these instructions in the first few days than from the course of the procedure itself. Patients break them not out of ill will, but because nobody explained the mechanism to them. A prohibition with a reason behind it is simply easier to keep than one without.
Eating, hygiene and dentures during healing
Diet for the first few days: lukewarm and soft. Hot food and drinks dilate the blood vessels and increase swelling, hard mouthfuls load the operated side, and small seeds and crumbs can lodge in the wound. Set alcohol aside for as long as you are taking medicines.
Hygiene matters more than it seems, and is most often neglected out of fear of the wound. Brush your teeth normally from the first day — apart from the surgical area itself, which you avoid with the brush until your clinician says otherwise. Use only the mouthwashes you have been advised to use, and only from the following day, tilting your head instead of rinsing vigorously: vigorous rinsing is also a pressure movement. Put the water flosser away until the follow-up appointment.
The denture is the point patients ask about least often and which causes the most trouble. If you wear a partial or complete denture covering the operated segment, do not put it in without your clinician’s explicit approval. Pressure from the denture base on a fresh wound can open the sutures and disturb graft healing. In practice the denture usually needs to be adjusted or relined with a soft material before it returns to daily use.
Red flags after a sinus lift — what requires same-day contact
Most symptoms after a sinus lift are part of normal healing. A few of them are not, and require contact with the practice without waiting for the scheduled review. Complications of procedures involving the sinus have been described and classified in the literature, together with recommendations on preventing them and on management once they occur.
| Green flag — predictable | Red flag — contact without delay |
| Cheek swelling increasing over two to three days, then diminishing | Swelling increasing after the fifth day instead of subsiding |
| Traces of blood in nasal discharge for a few days | Heavy, persistent bleeding from the nose |
| A feeling of a blocked nose on the operated side | Purulent or foul-smelling nasal discharge |
| A bruise on the cheek changing colour | Fever increasing after the third day |
| Mild to moderate pain, easing from day to day | One-sided pain that increases instead of decreasing |
| Temporary tenderness of the area to touch | A sensation of air or fluid passing between the mouth and the nose |
There is one symptom in the right-hand column that patients dismiss particularly often. The feeling that when drinking the liquid “escapes into the nose”, or that air passes between the mouth and the nose, means there is a communication between the oral cavity and the sinus. With this symptom — and with any other from the right-hand column — the appropriate response after a sinus lift is a telephone call to the practice the same day, not watchful waiting until Monday.
In practice, telling a green flag from a red one rests on a single criterion: the direction of change over time. Typical symptoms weaken after a few days — the swelling goes down, the pain diminishes, the discharge becomes clearer. Worrying symptoms behave the other way round: they appear later than they should, or they intensify from one day to the next.
When a sinus lift can be avoided
Almost every patient asks this question. The answer is: sometimes yes, though not for everyone.
The first route is short implants. In a multi-centre study with random allocation of patients, followed for ten years, six-millimetre implants placed without opening the sinus were compared with implants 11–15 mm long placed after sinus floor elevation. Implant survival was similar in both groups, while the shorter implants were associated with less burden of treatment for the patient and a lower cost. A broad review of methods for restoring the posterior upper jaw leads to a convergent conclusion: the outcomes are comparable, and there are markedly more complications in the group undergoing sinus floor elevation.
The second route concerns edentulous patients and relates directly to full-arch protocols. Tilting the distal implants backwards is not a technical whim — it was conceived in order to make use of the bone lying in front of the anterior wall of the sinus and not to open the sinus at all. An implant placed at an angle has a longer path through bone than a vertical one in the same place, and its prosthetic part emerges further back, which allows the bridge to be supported on more widely spaced abutments. In a follow-up lasting from twelve to fifteen years, restorations supported by two axial and two tilted implants proved successful in the long term. We describe this in more detail in our comparison of the All-on-4 and All-on-6 full-arch protocols.
In conversations with patients coming to Modern Dental & Orthodontics (Klinika MDO), the question of whether the procedure can be “bypassed” keeps returning. An honest answer requires two situations to be separated. Where a single tooth is missing in the posterior segment, an alternative genuinely exists. In full-arch restoration the decision is governed not only by the amount of bone, but also by the prosthetic plan and the distribution of the bridge abutments — and those conditions cannot always be met without involving the sinus. That is why this conversation always begins with the scan, not with a catalogue of methods. You will find more about qualifying for implants on the page devoted to implant treatment, and about the surgical side of treatment in the section on dental surgery.
Frequently asked questions
Does a sinus lift hurt?
Not during the procedure. Local anaesthesia covers the whole operated area, and the patient feels pressure and vibration, not pain. Symptoms appear once the anaesthesia wears off, require standard painkillers and settle within a few days. The greatest discomfort usually falls on the second and third day.
How long does recovery after a sinus lift take?
The noticeable stage is short: swelling builds over two to three days and usually subsides within a week, and the sutures are removed after a dozen or so days. Bone healing takes considerably longer and proceeds without symptoms — in the two-stage approach it is counted in months, not weeks.
Why must you not blow your nose after a sinus lift?
Because it is the strongest surge of pressure we generate in this region day to day. Pressure from the nasal cavity is transmitted directly to the freshly lifted sinus membrane and can detach it or displace the material that has been placed, before it has had time to stabilise. Clear a runny nose gently.
Can you fly after a sinus lift?
Not straight away. During take-off and landing the ambient pressure changes and the sinus has to equalise it — a freshly operated sinus is not ready for that. The date from which flying is safe is set by the treating clinician, because it depends on the extent of the procedure and on the course of healing.
Is blood in nasal discharge normal?
Small traces of blood on the operated side during the first few days fall within the typical course and result from the proximity of the surgical field and the sinus lining. What is worrying, however, is heavy, persistent bleeding and purulent or foul-smelling discharge — these require contact with the practice.
What are the complications of a sinus lift?
The most common event during the procedure is perforation of the sinus lining, usually repaired straight away during the same appointment, without interrupting treatment. Among the complications requiring intervention after the lateral window procedure, wound dehiscence, exposure or loss of the graft and maxillary sinusitis are described.
Can implants be placed without lifting the sinus?
In some patients, yes. Where single teeth are missing, short implants may be an alternative; at ten-year follow-up they performed comparably to longer implants placed after sinus elevation. In full-arch restoration the distal implants are tilted backwards. The choice is determined by the scan and the prosthetic plan.
Do anticoagulants have to be stopped before a sinus lift?
Never on your own. Interrupting such treatment on your own initiative can be more dangerous for the body than bleeding in the surgical field. Any change of dose is decided by the treating clinician in consultation with the doctor who prescribed the drug. Bring a full list of the preparations you take to the consultation, or simply photographs of the packaging.
Can I wear a denture after a sinus lift?
Not over the operated segment, and not without your clinician’s explicit approval. The denture base presses on the fresh wound, which can open the sutures and disturb graft healing. The denture usually needs adjusting beforehand: grinding down or relining with a soft material. The date for returning to wearing it is set by the clinician at the follow-up appointment.
When are implants placed after a sinus lift?
It depends on how much bone is left beneath the sinus. If there is enough to stabilise the implant, it is placed during the same procedure. If not, treatment is divided into two stages and placement follows only once the graft has matured, that is after several months of healing.
Summary
A sinus lift is a predictable procedure, performed under local anaesthesia, after which the first two to three days are the most troublesome. What distinguishes it from other procedures in the mouth lies not in the procedure itself but in the recovery: for a defined period you have to avoid everything that abruptly changes pressure in the airways. Blowing the nose, sneezing with the mouth closed, flying or playing a wind instrument are not prohibitions born of caution — they act on the sinus membrane mechanically. Most, however, depends on two conversations before the procedure: about the medicines you take, and about the condition of the sinuses themselves. It is also worth knowing that in some patients a sinus lift can be avoided by using short implants or by tilting the implants in a full-arch restoration. The final decision depends on the individual clinical situation and is taken after analysis of the scan, not on the basis of the name of the procedure, which sounds far more serious than what actually happens.
Read more:
- Implant treatment — dental implants
- Bone augmentation before an implant — types of procedure and materials
- All-on-4 or All-on-6 — a comparison of full-arch protocols
- How long healing takes after implant placement
- 72 hours after a dental implant — what is normal and what is not
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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