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The Valsalva maneuver is a forced expiratory effort performed against a closed airway that produces transient increases in intrathoracic and intranasal pressure.
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In dentistry, the maneuver can help identify an abnormal connection between the oral cavity and the maxillary sinus by demonstrating air movement through the suspected communication. However, it should be regarded as a clinical adjunct rather than a definitive diagnostic test.
✅ What Is the Valsalva Maneuver?
The conventional Valsalva maneuver consists of attempting to exhale forcefully while the airway is closed. This increases intrathoracic pressure and produces predictable cardiovascular and respiratory responses. The magnitude of these responses varies according to the duration and intensity of straining, body position, lung volume, and breathing pattern.
In oral surgery, a modified and gentle form of the maneuver may be used to assess suspected communication between the oral cavity and maxillary sinus.
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An oroantral communication is an abnormal connection between the oral cavity and maxillary sinus, most commonly associated with extraction of posterior maxillary teeth because of their anatomical proximity to the sinus floor. Implant surgery, sinus augmentation, trauma, and other maxillary procedures can also produce this complication.
During the clinical examination, increased pressure within the nasal and sinus cavities may cause air to pass through an OAC and emerge into the oral cavity. Clinically, this may appear as air bubbles, bleeding, fluid movement, or an audible air leak at the extraction socket or suspected communication.
Clinical Technique
The maneuver should be performed gently and only when clinically indicated:
1. Position the patient comfortably, preferably upright.
2. Keep the patient's mouth open.
3. Ask the patient to close the nostrils gently.
4. Instruct the patient to attempt a gentle exhalation against the closed nasal passages.
5. Observe the extraction socket or suspected communication for air bubbles, movement of blood or secretions, or an audible air leak.
6. Stop the maneuver immediately after obtaining a clinically meaningful response.
The objective is to generate sufficient pressure to identify air passage without producing excessive pressure within the maxillary sinus.
✅ Interpretation of the Test
| Finding | Possible Interpretation |
|---|---|
| Air bubbles at the socket | Suggestive of oroantral communication |
| Air or blood movement through the opening | Supports the presence of communication |
| Audible air leakage | May indicate an oroantral defect |
| No detectable air movement | Does not reliably exclude a small communication |
| Persistent sinus-related symptoms | Requires additional clinical and radiographic evaluation |
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The Valsalva maneuver should not be considered a standalone diagnostic procedure. Small communications may produce no visible clinical response, resulting in false-negative findings. Recent literature has specifically highlighted the limited sensitivity of the post-extraction Valsalva test for small OACs.
When clinical suspicion persists, additional evaluation may include periapical or panoramic radiography, while cone-beam computed tomography (CBCT) can provide three-dimensional information about the defect and the condition of the maxillary sinus.
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The maneuver should be performed with minimal and controlled pressure. Excessive pressure may theoretically enlarge a fresh communication or promote the displacement of oral contaminants toward the maxillary sinus. Contemporary clinical literature therefore recommends caution when using the test.
Routine aggressive probing of a suspected communication is also undesirable because instrumentation can traumatize the sinus membrane or introduce bacteria and foreign material into the sinus.
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▪️ Use the Valsalva maneuver as an adjunct, not as the sole method for diagnosing an oroantral communication.
▪️ Perform it gently and briefly, particularly immediately after extraction.
▪️ If clinical suspicion remains despite a negative result, consider appropriate radiographic or CBCT evaluation.
▪️ Avoid forceful pressure and unnecessary probing of a fresh extraction socket.
▪️ Document the clinical findings and evaluate the patient for symptoms or signs of maxillary sinus involvement.
💬 Discussion
The Valsalva maneuver remains a simple chairside method for detecting clinically apparent oroantral communication, particularly following posterior maxillary extraction. Its principal advantage is its immediate availability and ability to demonstrate air passage through a communication without specialized equipment.
Its principal limitation is diagnostic sensitivity. A negative test does not exclude a small defect, and excessive pressure may be undesirable in a recently created communication. Therefore, the maneuver should form part of a broader diagnostic assessment that incorporates the surgical history, intraoral findings, symptoms, and appropriate imaging.
✍️ Conclusion
The Valsalva maneuver in dentistry is a useful clinical adjunct for detecting suspected oroantral communication, particularly after posterior maxillary procedures. A positive finding can provide immediate evidence of communication, whereas a negative result does not reliably exclude a small defect. Careful technique, minimal pressure, and appropriate radiographic assessment when indicated are essential for safe and accurate clinical decision-making.
📚 References
✔ Arslanoglou, N. M., Plakogiannaki, E., Stergiou, T., Kafas, P., Lillis, T., & Dabarakis, N. (2026). Post-extraction false-negative Valsalva test in oroantral communications: Diagnostic challenges and clinical implications. European Journal of Dental and Oral Health, 7(4), 6–13. https://doi.org/10.24018/ejdent.2026.7.4.70550
✔ Khandelwal, P., & Hajira, N. (2017). Management of oro-antral communication and fistula: Various surgical options. World Journal of Plastic Surgery, 6(1), 3–8.
✔ Parvini, P., Obreja, K., Begic, A., Schwarz, F., Becker, J., & Sader, R. (2019). Decision-making in closure of oroantral communication and fistula. International Journal of Implant Dentistry, 5, 13. https://doi.org/10.1186/s40729-019-0165-7
✔ Pstras, L., Thomaseth, K., Waniewski, J., Balzani, I., & Bellavere, F. (2016). The Valsalva manoeuvre: Physiology and clinical examples. Acta Physiologica, 217(2), 103–119. https://doi.org/10.1111/apha.12639
✔ Visscher, S. H., van Minnen, B., & Bos, R. R. M. (2010). Closure of oroantral communications: A review of the literature. Journal of Oral and Maxillofacial Surgery, 68(6), 1384–1391. https://doi.org/10.1016/j.joms.2009.07.026
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