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The Relationship of the Medial Maxillary Sinus Roof to the Sphenoid and Posterior Ethmoid Sinuses in Korean: A Radiologic Study
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한국인에서 상악동 내측 지붕과 접형동 및 후사골동과의 관계에 대한 영상학적 연구

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Type
Academic journal
Author
Journal
대한이비인후과학회 대한이비인후-두경부외과학회지 대한이비인후과학회지 두경부외과학 제58권 제10호 KCI Accredited Journals
Published
2015.1
Pages
682 - 686 (5page)

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The Relationship of the Medial Maxillary Sinus Roof to the Sphenoid and Posterior Ethmoid Sinuses in Korean: A Radiologic Study
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Background and Objectives The aim of this study was to perform radiologic study assessing the utility of the medial maxillary sinus roof (MMSR) as a reference point for providing a safe route of entry into the sphenoid and the posterior ethmoid sinuses in Korean patients. Subjects and Method We retrospectively reviewed 82 consecutive ostiomeatal computed tomographic scans of Korean adult patients performed from January 2014 to December 2014. Using the nasal floor as a reference point, the vertical distances to the highest MMSR, natural sphenoid ostium, anterior sphenoid roof and floor and posterior ethmoid skull base were measured. Then the vertical distances from the highest MMSR to the sphenoid ostium, anterior sphenoid roof and floor and posterior ethmoid skull base were calculated. The maxillary sinus to posterior ethmoid height ratio was calculated. Results The average height of the highest MMSR relative to the nasal floor was measured to be 33.95±3.36 mm. The vertical distance from the highest MMSR to the natural sphenoid ostium, anterior sphenoid roof and floor and posterior ethmoid skull base was 1.87±3.52 mm, 11.77±3.30 mm, 6.09±3.16 mm, and 15.46±3.07 mm respectively. The mean ratio of the maxillary sinus to the posterior ethmoid height was 2.3±0.56. Conclusion The MMSR can be used as a reliable landmark to localize the natural sphenoid ostium and to enable a safe entry into the posterior ethmoid. Moreover, it provides a reasonable margin of safety from the skull base.
#Computed tomography #Ethmoid sinus #Medial maxillary sinus roof #Sphenoid sinus

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References (7)

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Bolger WE / 1999 / Use of the superior meatus and superior turbinate in the endoscopic approach to the sphenoid sinus / Otolaryngol Head Neck Surg 120 (3) : 308 ~ 313 google schola Casiano RR / 2001 / A stepwise surgical technique using the medial orbital floor as the key landmark in performing endoscopic sinus surgery / Laryngoscope 111 (6) : 964 ~ 974 google schola Harvey RJ / 2010 / Using fixed anatomical landmarks in endoscopic skull base surgery / Am J Rhinol Allergy 24 (4) : 301 ~ 305 google schola Lee JM / 2012 / Preoperative evaluation of the maxillary sinus roof as a guide for posterior ethmoid and sphenoid sinus surgery / J Otolaryngol Head Neck Surg 41 (5) : 361 ~ google schola May M / 1994 / Revision endoscopic sinus surgery: six friendly surgical landmarks / Laryngoscope 104 (6 Pt 1) : 766 ~ 767 google schola

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