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Updated: Jul 25, 2026

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Published on: July 4, 2021
Silent sinus syndrome: a mechanical theory
Bertrand Baujat1, Rémi Derbez, Raphaelle Rossarie
1Department of Head and Neck Surgery, Hôpital Foch, Suresnes, France. b.baujat@hopital-foch.org
Progressive enophthalmos developed 23 years after orbital floor fracture. This case suggests masticatory muscle movements may cause silent sinus syndrome via aspiration of orbital fat.
Area of Science:
- Ophthalmology
- Otorhinolaryngology
- Plastic and Reconstructive Surgery
Background:
- Orbital floor fractures can lead to delayed complications.
- Silent sinus syndrome (SSS) is characterized by orbital tissue prolapse into the maxillary sinus.
Observation:
- A patient presented with progressive enophthalmos 23 years post-orbital floor fracture.
- Imaging revealed orbital fat herniation into the pterygopalatine fossa and maxillary sinus wall collapse.
Findings:
- The findings suggest a potential link between masticatory muscle activity and SSS.
- Aspiration of orbital fat into the pterygopalatine fossa due to masticatory movements is hypothesized.
Implications:
- This mechanism offers a novel explanation for some cases of SSS.
- Understanding this phenomenon could refine the management of delayed orbital complications.
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