ABSTRACT
Background: Recognition of the maxillary sinus position is tedious as it is small and not easily seen. A detailedknowledge of the anatomical variations of maxillary sinus opening is required for endoscopic surgeons toperform safe surgeries. The aim of the present study is to determine the anatomical location of the maxillaryostium in a cadaveric specimen. The position of the accessory maxillary sinus, if present is also noted to furtherbenefit the surgeons.Materials and Methods: Thirty bisected halves of the formalin fixed adult head and neck specimens were obtainedfrom the Department of Anatomy. The anterior part of the skull was divided in the midline and then the nasalseptum was removed taking care not to damage the osteomeatal components. Probes were used in identifyingthe location of maxillary sinus ostium. Various other parameters like vertical diameter, transverse diameter,distance between ostium and anatomical landmarks such as inferior concha and hard palate were measured.Results: In accordance to the parameters considered in the current study, the following results were observed.The maxillary sinus ostium was present in the posterior 1/3rd of the Hiatus semilunaris in 53% of the cadavers.The most common shape of maxillary sinus ostium was oval. The mean vertical and transverse diameters ofostium were 2mm and 2.6mm respectively. The perpendicular distance of the ostium from the lower border ofinferior concha was 14.6 mm and from the upper border of the hard palate was 17.5 mm.Conclusion: The knowledge about the variations in location of the maxillary sinus Ostium and the distances ofthe ostium from the major anatomical landmarks will help the maxillofacial surgeons and otolaryngeologists toperform the surgical procedures safely.
ABSTRACT
Background: Frontal air sinus opens in Hiatus semilunaris of middle meatus of Nasal cavity. Nowadays plentyof endoscopic surgeries are happening at Middle meatus; so there is need to explore more about detail anatomyof opening of sinuses. So Present study was undertaken to note the exact site of opening of Frontal air sinus inHiatus semilunaris of Nasal cavity.Context and Purpose of study: Study was conducted on 50 specimens. Out of that 27 were from Right side & 23were from Left side. The specimens were the sagittal sections of adult cadavers in the department ofAnatomy,Krishna Institute of Medical sciences University, Karad. The parameters measured were, Distance ofFrontal air sinus opening from Anterior end of Hiatus semilunaris (nasal bone). Distance of Frontal air sinusopening from Posterior end of Hiatus semilunaris(Inferior surface of Body of Spenoid bone). Diameter of Frontalair sinus opening. Shape of Frontal air sinus opening. All these measurements were taken by Sliding VernierCaliper of 30cm length & 0.001 accuracy.Results: The mean Distance of Frontal air sinus opening from Anterior end of Hiatus semilunaris (nasal bone)was- 1.63cms on Left side & 1.52cms on Right side. The mean Distance of Frontal air sinus opening fromPosterior end of Hiatus semilunaris(Inferior surface of Body of Spenoid bone) was- 4.26 cms on Left side &4.17cms on Right side. The mean Diameter of Frontal air sinus opening – 0.19cms on Left side & 0.18cms on Rightside. The shape of Frontal sinus opening is mainly Circular.Conclusion and Summary: Knowledge of the anatomy of the Frontal air sinus opening is basically helpful for theAnatomists, to know where exactly is the site of the opening of Frontal air sinus in the middle meatus of nasalcavity; And secondarily it might be helpful to ENT surgeons during the performance of endonasalcystorhinostomies.