Observation of maxillary sinus septa and bony bridges using dry skulls between Hellman's dental age of IA and IIIC

Abstract

Summary: Maxillary sinus septa and bony bridges were observed using dry skulls in childhood, classified based on Hellman's dental age, to clarify maxillary sinus septum formation.Eighty-eight maxillary sinuses of 44 dry skulls and a cone-beam computed tomography (CBCT) unit were used. The locations of the septum, defined as a pointed bony structure originating from the inferior wall, and bony bridge, defined as a bony structure between the maxillary sinus wall and dental germ, were antero-posteriorly recorded, and the superoinferior distance, distance from the bony palate, and angle to the median palatine suture were measured.The rate of septum presence in the maxillary sinus was high (41.7%) in IIIC, and the septa were located in the deciduous molars, premolars, and molars. Also, all bony bridges were related to the median maxillary sinus wall, and the rate of the maxillary sinus showing a bony bridge was high in IIA and IIIA.

Longitudinal observation of maxillary sinus bony bridges and septa in childhood

“…The height of the bony bridges and septa was over 3 mm in the present study. The mean height of the bony bridges in the molar region was reported as 1.6 mm, and the mean height of the septa in first molar region was reported as 2.2 mm in a previous study 4) . Since bony bridges and septa were larger in comparison with those in the present study, it was considered that their depiction was possible in multislice CT images, in whose resolution was low.…”

“…Also, a septum was defined as a pointed bony structure in the inferior maxillary sinus wall. The height of each bony bridge/ septum, angle between the direction of the bony bridge/ septum and median sagittal plane, and the supero-inferior distance between the base of the bony bridge/septum and bony palate were measured using a previous method 4) . One oral and maxillofacial radiologist with experience of 33 years (M.N.)…”

“…The etiology of the maxillary sinus septa has been considered to be pressure such as that caused by chewing, and disharmony between the enlargement of sutures and resorption of the bone surface in the alveolar process and maxillary sinus 2,3) . The bony bridges, defined as a bony structure between the maxillary sinus wall and dental germ, were observed using dry child skulls and cone-beam CT. Also, it was considered that a bony bridge might change to a maxillary sinus septum with root formation and tooth eruption 4) .…”

Observation of maxillary incisive canal using dry skulls between Hellman’s dental age IA and IIIC

“…12,13) Forty-four child skulls were used in the present study; however, skulls showing IA and IIIB of Hellman's dental age were limited.…”

Localización del Septo del Seno Maxilar a través de Abordaje Endoscópico: Reporte de Caso y Revisión de la Literatura

“…Según Naitoh et al (2010) la prevalencia de septos del total de senos maxilares incluidos en su estudio es superior al 40 %, no describiendo la localización mas prevalente. Sin embargo otros autores como Krennmair et al (1997), reportan una prevalencia mucho más baja, no superior al 20%, reportando como localización más frecuente la región de primer y segundo premolar, todos estos autores utilizaron la tomografía computarizada como herramienta diagnóstica, lo que da una certeza muy aproximada de los hallazgos reportados (Tabla II).…”