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Related Experiment Video

Updated: Nov 19, 2025

Reduction of Iatrogenic Atrial Septal Defects with an Anterior and Inferior Transseptal Puncture Site when Operating the Cryoballoon Ablation Catheter
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Transantral intraseptal sinuous canal.

M C Rusu1, C Bichir2, A D Vrapciu1

  • 1Division of Anatomy, Faculty of Dental Medicine, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania.

Folia Morphologica
|January 29, 2021
PubMed
Summary
This summary is machine-generated.

A rare variant of the sinuous canal within the maxillary sinus (MS) was identified. This anatomical variation, coursing transantrally, requires careful documentation in cone-beam computed tomography (CBCT) for dental procedures.

Keywords:
infraorbital canalinfraorbital nervemaxillary sinussuperior anterior alveolar nerve

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Area of Science:

  • Anatomy
  • Radiology
  • Oral and Maxillofacial Surgery

Background:

  • The sinuous canal is an established intramural passage within the maxillary sinus (MS).
  • Typically, it runs within the sinus roof and anterior wall, housing vital nerves and arteries.

Purpose of the Study:

  • To document a peculiar anatomical variant of the sinuous canal.
  • To highlight its potential implications for dental and surgical interventions.

Main Methods:

  • Retrospective analysis of cone-beam computed tomography (CBCT) scans.
  • Documentation of an unusual sinuous canal course and its relationship with an oblique septum within the maxillary sinus.

Main Results:

  • A unique sinuous canal variant was observed, originating posteriorly and coursing transantrally.
  • This variant involved an incomplete oblique septum dividing the maxillary sinus into two chambers.

Conclusions:

  • The sinuous canal can exhibit a transantral course, deviating from the typical intramural path.
  • Accurate CBCT documentation of this variant is crucial for planning surgical or endoscopic procedures involving the maxillary sinus to avoid complications.