Anatomical Features of the Parotid Duct in Sialography as an Aid to Endoscopy—A Retrospective Study

Sialography is used for diagnosis of obstructive salivary gland diseases and prior to sialendoscopy. Three-dimensional cone beam computerized tomography (CBCT) sialography allows imaging and measurement of salivary duct structures. Salivary gland endoscopy has a long learning curve. The aim of this retrospective study is to create an anatomical quantitative guide of different distances and angles significant for endoscopy. Twenty-six CBCT sialographies of healthy parotid ducts were included. Outcome parameters included diameters, distances, angles and number of minor tributaries. Results show the average distance from the papilla to the curvature of the gland was 41.5 mm (Q1 36.97 mm–Q3 45.32 mm), with an angle of 126.9° (Q1 107.58°–Q3 135.6°) of the curvature and a distance of 35.25 mm (±7.81 mm) between the curvature and the hilus. The mean width of the duct was 0.8 mm (Q1 0.7 mm–Q3 1.15 mm) at its narrowest and 2 mm (Q1 1.4 mm–Q3 2.2 mm) at its widest. This is the first anatomical quantitative study of the parotid duct in relation to sialendoscopy.

[1]  N. Keshet,et al.  Standardization of terminology, imaging features, and interpretation of CBCT sialography of major salivary glands: a clinical review. , 2021, Quintessence international.

[2]  Nithin Chacko Thomas,et al.  Three-dimensional cone-beam computed tomographic sialography in the diagnosis and management of primary Sjögren syndrome: Report of 3 cases , 2021, Imaging science in dentistry.

[3]  Yehonatan Ben-Zvi,et al.  The unique characteristics of sialolithiasis following drug-induced hyposalivation , 2021, Clinical oral investigations.

[4]  C. Ewertsen,et al.  Imaging of the major salivary glands , 2016, Clinical physiology and functional imaging.

[5]  T. Massoud,et al.  The salivary ducts of Wharton and Stenson: analysis of normal variant sialographic morphometry and a historical review. , 2013, Annals of anatomy = Anatomischer Anzeiger : official organ of the Anatomische Gesellschaft.

[6]  P. P. Singh,et al.  Sialendoscopy: Introduction, Indications and Technique , 2013, Indian Journal of Otolaryngology and Head & Neck Surgery.

[7]  C. Burke,et al.  Imaging the major salivary glands. , 2011, The British journal of oral & maxillofacial surgery.

[8]  O. Hasson.  Modern sialography for screening of salivary gland obstruction. , 2010, Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons.

[9]  S. Mukherji,et al.  Conebeam CT of the Head and Neck, Part 1: Physical Principles , 2009, American Journal of Neuroradiology.

[10]  T. H. Quinn,et al.  Surgical anatomy of the parotid duct with emphasis on the major tributaries forming the duct and the relationship of the facial nerve to the duct , 2004, Clinical anatomy.

[11]  P. Dulguerov,et al.  Sialolithiasis management: the state of the art. , 2003, Archives of otolaryngology--head & neck surgery.

[12]  O. Nahlieli,et al.  Endoscopic technique for the diagnosis and treatment of obstructive salivary gland diseases. , 1999, Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons.

[13]  B. Schmidt,et al.  The relationship of the buccal branch of the facial nerve to the parotid duct. , 1996, Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons.

[14]  D. Wiesenfeld,et al.  The anatomy of the facial nerve in relation to CT/sialography of the parotid gland. , 1983, The British journal of radiology.