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Olfactory Fossa Evaluation as a Maxillary Sinus Development Using Cone Beam Computed Tomography.

Bahadır Sancar1, Suayip Burak Duman2

  • 1Department of Dentomaxillofacial Surgery, Faculty of Dentistry, Inonu University, Malatya, Turkey.

Indian Journal of Otolaryngology and Head and Neck Surgery : Official Publication of the Association of Otolaryngologists of India
|December 1, 2022
PubMed
Summary
This summary is machine-generated.

Individuals with hypoplastic maxillary sinuses have deeper olfactory fossae and longer lateral lamellae, increasing the risk of skull base perforation during endoscopic sinus surgery.

Keywords:
Endoscopic sinus surgeryHypoplasic maxillary sinusLateral lamella lengthOlfactory fossa depth

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Area of Science:

  • Otolaryngology
  • Neurosurgery
  • Radiology

Background:

  • Endoscopic sinus surgery (ESS) requires precise anatomical knowledge.
  • Maxillary sinus hypoplasia is a condition that may alter surrounding sinonasal structures.
  • The risk of skull base perforation during ESS in patients with maxillary sinus hypoplasia is not well-defined.

Purpose of the Study:

  • To evaluate the risk of skull base perforation in patients with maxillary sinus hypoplasia undergoing ESS.
  • To compare olfactory fossa depth and lateral lamella length in patients with and without maxillary sinus hypoplasia.

Main Methods:

  • Cone Beam Computed Tomography (CBCT) scans of 52 patients with bilateral maxillary sinus hypoplasia and 52 controls were analyzed.
  • Olfactory fossa depth and lateral lamella length were measured and compared between groups.

Main Results:

  • Patients with maxillary sinus hypoplasia exhibited significantly deeper olfactory fossae compared to controls.
  • A significantly longer lateral lamella length was observed in individuals with maxillary sinus hypoplasia.
  • These anatomical variations increase the potential risk of skull base injury during ESS.

Conclusions:

  • Maxillary sinus hypoplasia is associated with anatomical changes in the sinonasal region, specifically deeper olfactory fossae and longer lateral lamellae.
  • These findings suggest an elevated risk of iatrogenic skull base perforation during endoscopic sinus surgery in this patient population.
  • Preoperative CBCT assessment is recommended for patients with maxillary sinus hypoplasia to identify potential risks and optimize surgical planning.