Bilateral hypoplasia of the maxillary sinus: swelling of the nasal mucosa after periapical periodontitis

Hypoplasia (underdevelopment) of the maxillary sinus and aplasia (failure of it to develop at all) are relatively rare and even less common bilaterally.1 The overall prevalence of hypoplasia has been reported as 1.5% - 10.0%, but some studies have reported even lower numbers.2 Dentists and oral surgeons often do not consider them (or conditions resulting from them) when looking at an orthopantogram.

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