Displaced Tooth Root or Implant in the Sinus
Have you been told that a tooth root or implant has moved into your sinus? The maxillary sinus is the air-filled space above your upper back teeth. An assessment can establish where the fragment or implant is and what care you need.
At Gloss & Floss Dental Care® in Södermalm, we review what happened, your symptoms and any existing X-rays. We then explain whether monitoring, removal or referral to an appropriate specialist is the next step.
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Content updated: 30 October 2026. Last recorded clinical fact-check: 29 September 2026. Sources are listed below.
Quick answer
- A displaced root or implant is not the same as an ordinary retained root tip. The exact position should be established before treatment is attempted.
- Panoramic OPG can provide a first overview, while CBCT may be needed when exact three-dimensional localisation and sinus involvement must be mapped.
- Not every case is managed identically. Symptoms, infection, oroantral communication, fragment size/mobility and surgical risk influence the plan.
- Displaced implants in the sinus usually warrant active specialist assessment because published series report frequent sinusitis and/or oroantral communication.
- Fever, rapidly increasing swelling, swelling around the eye, difficulty swallowing or breathing require urgent assessment.
What does displacement of a tooth or tooth root mean?
During extraction or another surgical procedure, a root tip, tooth fragment or implant can rarely be displaced from its original position. The maxillary sinus is the anatomical space most often described after displacement from the posterior upper jaw, although fragments can also move into other soft-tissue or fascial spaces.
It is important to distinguish between a small retained root tip within the socket, a fragment beneath or within the sinus membrane, a freely displaced foreign body in the sinus and a migrated implant. These situations do not have the same risk profile and should not automatically receive the same treatment.
Retained root fragment in the socket
Key pointRisk and benefit must be weighed. Some small fragments may be safer to monitor when removal would cause greater harm and there is no infection.
Fragment near or beneath the sinus membrane
Key pointExact position and any membrane perforation need to be understood before choosing a surgical route.
Free fragment in the maxillary sinus
Key pointIt can act as a foreign body and contribute to sinus disease. Specialist assessment is often appropriate.
Displaced dental implant
Key pointAn implant is a larger foreign body than a small root tip and is commonly considered for early retrieval.
Symptoms that should be assessed after extraction or implant surgery
Tenderness and swelling can be part of normal healing. What raises concern for a sinus-related complication is an unusual course, one-sided nasal/sinus symptoms or signs of a communication between the mouth and sinus.
One-sided cheek pressure or pain
May occur with sinus irritation, infection or a foreign body, although it is not specific for displacement.
One-sided nasal blockage or foul discharge
Can suggest odontogenic sinusitis and warrants targeted assessment.
Air or fluid passing between mouth and nose
Can indicate an oroantral communication and should be assessed promptly.
Bad taste, odour or pus
Can indicate infection in the surgical site or maxillary sinus.
Delayed or increasing pain
May be caused by infection, alveolar complications, a retained fragment or another postoperative problem.
Fever or rapidly increasing swelling
Can indicate infection requiring prompt care.
Diagnosis – localise first, then decide treatment
When displacement is suspected, accurate localisation is central. Repeated attempts to retrieve a fragment without adequate visualisation or localisation can increase tissue trauma or make retrieval more difficult. Imaging should therefore be chosen according to the clinical question.
| Method | Strength | When it may be useful |
|---|---|---|
| Intraoral X-ray | High local detail around a tooth, root and socket. | When the fragment is still thought to be close to the extraction site. |
| Panoramic OPG | Broad 2D overview of jaw and sinus region. | For initial localisation and anatomical overview. |
| CBCT | Three-dimensional localisation and better assessment of sinus involvement. | When exact position, orientation or surgical access needs to be planned. |
Read more about dental imaging and panoramic OPG. More complex 3D imaging is selected only when the clinical question requires it.
Does every displaced root or implant have to be removed?
A small root fragment and a displaced implant may need different treatment. Your dentist will weigh the position, symptoms, sinus health and risks of removal before recommending a plan. Much of the published evidence comes from individual cases and patient series, so the decision needs to be tailored to you.
When observation may be considered
- a small and stable fragment,
- no symptoms or signs of sinusitis,
- no oroantral communication or another active complication,
- retrieval is judged to carry greater risk than leaving the fragment,
- clinical and radiographic follow-up is feasible.
When active retrieval is more often considered
- a free foreign body in the maxillary sinus,
- a displaced dental implant,
- sinusitis or another infection,
- oroantral communication or fistula,
- symptoms, migration or a position associated with future risk.
A 2023 systematic review included 73 articles describing 321 patients with displaced dental implants. Most implant displacements occurred within six months of placement; 56.2% of patients became symptomatic, most commonly with maxillary sinusitis and/or oroantral communication. The authors emphasised prevention and early removal of displaced implants to reduce infectious complications.
Surgical retrieval routes
Retrieval can be performed through an intraoral/lateral approach, endoscopic transnasal surgery or combined techniques. The method depends on foreign-body position, sinus pathology, any oroantral communication and the oral/maxillofacial or ENT expertise required. Published reviews support an important role for endoscopic techniques, but the evidence base remains dominated by observational reports.
Displacement, oroantral communication and dental sinusitis
These problems may occur separately or together:
Displacement
A root, tooth fragment or implant has moved into an unintended anatomical space.
Oroantral communication
An opening has developed between the oral cavity and maxillary sinus after extraction or surgery.
Oroantral fistula
A persistent, epithelialised communication that has not closed spontaneously.
Dental / odontogenic sinusitis
Inflammation of the maxillary sinus arising from a dental source, for example infection, a foreign body or an oroantral communication.
A 2025 systematic review found that oroantral-communication management depends particularly on defect size, epithelialisation and the presence of sinus infection. Larger or infected defects more often require surgical closure and, in selected cases, coordinated sinus treatment.
Read more about dental sinusitis and sinus perforation.
Aftercare following sinus-related surgery
After surgery near the maxillary sinus or when an oroantral communication is present, individual instructions are important. Common principles include avoiding forceful nose blowing and unnecessary pressure in the sinus, sneezing with the mouth open, following oral-hygiene and medication instructions and attending planned follow-up.
Antibiotics are not a universal solution for a displaced root or implant and do not replace diagnosis or necessary surgical treatment. Their use depends on infection, sinusitis, the procedure and the patient’s medical situation.
When is urgent or specialist care needed?
- fever with significant systemic illness,
- rapidly increasing facial or jaw swelling,
- swelling or symptoms around the eye,
- difficulty swallowing or breathing,
- severe or rapidly worsening pain,
- a clear mouth-to-sinus communication with deterioration,
- a foreign body in a position requiring oral/maxillofacial or ENT coordination.
For acute dental problems, see Emergency dental care.
Future dental implants and reconstruction
A sinus-related complication does not automatically rule out future implant treatment. Once infection is controlled, any communication has healed, and sinus and bone conditions are stable, new treatment planning can begin. Some patients may first need guided bone regeneration, sinus lift or an alternative prosthetic solution.
New implant planning should begin only after the complication has been fully assessed and treated. Read more about dental implants.
Second opinion after a suspected surgical complication
If the extraction or implant procedure was performed at another clinic, a second opinion can be useful. Assessment may include the previous dental record, existing X-rays, what occurred during the procedure, current symptoms and whether any additional imaging or specialist referral is actually needed.
The purpose is to clarify the problem and the medically appropriate next step—not to automatically repeat treatment or imaging. Read about second opinion.
Sources and clinical fact-check
- 2023 systematic review – displaced dental implants in the maxillary sinus
- Systematic review – foreign-body displacement into the maxillary sinus
- 2026 case report/review – displaced root fragment in the maxillary sinus
- 2026 risk-stratified study – maxillary sinus foreign-body management
- 2025 systematic review – oroantral communication management
Your questions about displaced roots and implants
Can a tooth root enter the maxillary sinus during extraction?
Yes. It is an uncommon but recognised complication, particularly during extraction of posterior upper teeth whose roots lie close to the sinus floor.
Does every root fragment in the sinus have to be removed?
Not in exactly the same way in every case. Management depends on fragment size, position and mobility, whether the sinus membrane is perforated, whether sinusitis or an oroantral communication is present, symptoms and the risks of surgical retrieval. Selected small asymptomatic fragments may sometimes be monitored, whereas freely displaced or symptomatic foreign bodies are more often considered for active removal.
What if a dental implant has displaced into the maxillary sinus?
A displaced implant is a foreign body in the sinus. A 2023 systematic review found that many reported patients became symptomatic, most often with sinusitis and/or oroantral communication. Early specialist assessment and planning for retrieval are therefore commonly appropriate.
Can a displaced root or implant be present without symptoms?
Yes. Some foreign bodies are found incidentally and may cause no early symptoms. Lack of symptoms does not remove the need to assess position, sinus status and future risk.
What is the difference between displacement and sinus perforation?
Displacement means that a root, tooth fragment or implant has moved to an unintended anatomical location. Sinus perforation or oroantral communication means that an opening has formed between the mouth and maxillary sinus. The two can occur together but are not the same problem.
Which imaging is used when displacement is suspected?
The imaging choice depends on the question. A panoramic OPG can provide a useful first overview. CBCT may be indicated when exact three-dimensional position, sinus involvement or the surgical access route needs to be established.
How is an implant that has migrated into the sinus removed?
Retrieval may use a lateral intraoral approach, endoscopic transnasal surgery or a combined approach. The method depends on implant position, sinus pathology, any oroantral communication and the specialist expertise required.
Can an oroantral communication heal by itself?
Some small, recent communications without infection may close spontaneously. Larger, persistent or infected defects may require surgical closure. Size, duration, epithelialisation and the presence of sinusitis influence treatment.
Should I blow my nose if I suspect an opening into the sinus?
Avoid forceful nose blowing and other activities that sharply increase sinus pressure until the area has been assessed. After sinus-related surgery or confirmed communication, individual instructions often include sneezing with the mouth open.
Are antibiotics always needed?
No. Antibiotics do not replace diagnosis or necessary surgical treatment. Their use depends on infection, sinusitis, the planned procedure and the patient’s medical situation.
Can I request a second opinion if the complication happened at another clinic?
Yes. A second opinion can include review of previous treatment, clinical examination, existing imaging and assessment of whether additional imaging or specialist referral is needed.
What should I bring to the assessment?
Bring previous radiographs, surgical or dental notes if available, a medication list and information about when the complication occurred and how symptoms have changed. This can help avoid unnecessary repetition of diagnostics.
Assessment for suspected displacement or sinus complication
If you have been told that a root fragment remains or has displaced, an implant has migrated, or you have developed new one-sided sinus symptoms after dental surgery, a focused assessment can clarify location, risk and the appropriate level of care.
