The Ostium Maxillare: Anatomic Study of Its Surgical Accessibility

Anatomical Variations of Accessory Maxillary Sinus Ostium: an Endoscopic Study

“…The incidence ranges from 0% -43%. In the present study accessory maxillary sinus ostium was observed in42(21%) out of 200 half heads that is in accordance with the study of Van Alyea [15] and singal [6] who reported the incidence of accessory maxillary ostia in 23% and 22.5% of the specimens respectively.. Though most of the authors have not specified the location of the accessory maxillary sinus ostium with reference to the fontanelle, (the membranous region of medial sinus wall) Kumar et al [21] in their dissections on thirty half heads from fifteen adult Indian cadavers reported that accessory maxillary ostium was present in 9(30%) half heads being located in ANF in 6(66.7%), in PNF in 2 (22.2%) and at HS 1(11.1%) in accordance with the present study i.e.out of 42(21%) accessory maxillary sinus ostium was located in ANF in (78.57%), in PNF(16.66% ) and at HS (4.76%).…”

The Location and Diameter of the Primary Maxillary Sinus Ostium in Malaysians: A Cone-Beam Computerized Tomography Study

“…more commonly found to open into the posterior third of the hiatus semilunaris in 198 (61.9%) of subjects, while it opened in the middle third in 59 (18.4%) and anterior third in 63 (19.7%) of the subjects. Similar findings were reported byVan Alvea (1936), where the opening of maxillary ostium was into the anterior third of the uncinate groove in 9 (5.53%) of subjects, middle third in 18 (11.04%), posterior third in 117 (71.8%) and extreme posterior tip of the groove in 19 (11.65%) of the subjects[7]. Singhal (2013) also stated that maxillary ostium was located at different positions of the hiatus semilunaris when studing dissected specimens of the head.…”

Anatomic description of the middle meatus and classification of the hiatus semilunaris into five types based upon morphological characteristics

“…Prasanna and Mamatha () found that in a majority (52.5%) of specimens, the ostium was located within the posterior 1/3 of the hiatus semiluaris. This confirmed the findings of previous work that reported the opening was found in the posterior third of the uncinate groove in 71.8% of cases (Van Alyea, ). Previous studies have quantified the width of the hiatus semilunaris as between 1–2 mm (Stammberger, ), but up to 3 mm (Hollinshead, 1968).…”