← All explanationsOdontogenic sinusitis

Can a tooth cause maxillary sinus inflammation?

Odontogenic sinusitis is maxillary sinus inflammation with a cause in the teeth, supporting tissues or dental treatment area. Infection around an upper tooth root is one possible source. Dental and ENT assessment complement each other to establish the cause and extent.

For training & practice ↓

Idealized upper-jaw cutaway with an illustrative apical finding near thickened maxillary sinus lining. Focus: Root-tip region. — Simplified model of a possible relationship. Not an image diagnosis or proof of the source of inflammation.

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Close anatomical neighbours

Upper back tooth roots lie close to the maxillary sinus. Proximity alone is normal and does not establish disease.

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Identify the source

One-sided or persistent symptoms may prompt investigation of a dental cause. They do not prove it, and toothache may be absent.

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Coordinate management

Management needs to address the identified cause. Additional ENT measures, medicines or procedures depend on individual findings.

Watch the short explanation ↓

At a glance

Possible dental link?

Yes, particularly around upper back teeth.

Must a tooth hurt?

No.

Assessment?

Dental review with ENT input when needed.

Knowledge in motion

Explained in 36 seconds.

Three steps. No audio.
Each scene can also be selected manually.

Silent educational film with German on-screen text and simplified teaching images. Not a patient case or a promised treatment outcome. The full English explanation is available below.

Read the film text in English

Close anatomical neighbours
Upper back tooth roots lie close to the maxillary sinus. Proximity alone is normal and does not establish disease.
Identify the source
One-sided or persistent symptoms may prompt investigation of a dental cause. They do not prove it, and toothache may be absent.
Coordinate management
Management needs to address the identified cause. Additional ENT measures, medicines or procedures depend on individual findings.

Often confused

Dental source or respiratory infection?

Not every inflamed maxillary sinus has a dental source. Identifying the cause helps determine appropriate care.

Quick answers

Can a painless tooth be involved?

Yes. Absence of toothache does not exclude a dental source; both tooth and sinus are assessed.

Is every one-sided sinus infection dental?

No. Other causes exist, so the affected side alone is not diagnostic.

Does everyone need a 3D dental scan?

No. Imaging depends on the clinical question and existing findings.

At the practice

For a personal discussion

Editorially suggested question to discuss with Dr Niusha Barahmand Pour:

Which findings support or oppose a dental source, and is ENT assessment needed?

Assessment of upper back teeth can form part of investigating recurrent maxillary sinus symptoms.

Discuss a possible dental sourceAppointment selection at Doctolib

Meet Dr. Niusha Barahmand Pour ↗

Learning layer for training & practiceUnderstand terminology and deepen knowledge

Odontogenic: Arising from teeth or their surrounding tissues.
Maxillary sinus: An air-filled cavity in the upper jaw.
Interdisciplinary: Involving different clinical specialties.

Make the distinction

Not every inflamed maxillary sinus has a dental source. Identifying the cause helps determine appropriate care.

Knowledge questionWhat establishes the source?

For learning, not for assessing personal symptoms. Your answer is not stored or sent.

Combined dental and ENT assessment.
One-sided pressure alone.
Absence of toothache.

View answer

Combined dental and ENT assessment.

A single symptom does not establish or exclude a dental cause.

Sources and context

Editorial research: 2026-11-02. General information, not an individual diagnosis or treatment recommendation. Teaching illustrations are simplified and do not depict a patient case.