Applied anatomy and oral surgery for dental students . n, the crests of the maxillary and palate bones, therostrum of the sphenoid, and the nasal spine of thefrontal bones assist in forming the nasal septum (Fig. 8). The bones entering into the formation of the lateralwall of the nasal chamber are: the nasal, the nasal processof the maxillary, the lacrimal, the ethmoid, the inferiorturbinated, the palate, and the pterygoid process andbody of the sphenoid. The inferior turbinated bone and the turbinatedprocesses of the ethmoid bone divide the lateral wall ofthe nasal chamber into several horizo
Applied anatomy and oral surgery for dental students . n, the crests of the maxillary and palate bones, therostrum of the sphenoid, and the nasal spine of thefrontal bones assist in forming the nasal septum (Fig. 8). The bones entering into the formation of the lateralwall of the nasal chamber are: the nasal, the nasal processof the maxillary, the lacrimal, the ethmoid, the inferiorturbinated, the palate, and the pterygoid process andbody of the sphenoid. The inferior turbinated bone and the turbinatedprocesses of the ethmoid bone divide the lateral wall ofthe nasal chamber into several horizontal compartmentsor meati, three being the number usually the majority of skulls, however, four meati are present,and in a few cases five or even six have been several meati have communications with the maxil-lary sinus and other pneumatic spaces (Fig. 9). The inferior meatus is situated between the floor of thenose and the inferior turbinated bone. Into it opensthe lacrimonasal duct, which conveys tears from theorbit. BONES 17. Fig. g.—An anteroposterior section within the nasal chamber, with the middleturbinate bone and portion of ceil walls turned up (Cryer). The middle meatus is found betweeji the inferior and^imiddle turbinated bones. Into it open the •maxillary-sinus, the frontal sinus, and the anterior and middle^ 38 APPLIED ANATOMY ethmoid cells. All these air-spaces open into themiddle meatus through the hiatus semilunaris, a semi-circular groove continuous with the infundibulum, whichis the outlet of the frontal sinus. Many authoritiesdo not regard the infundibulum as distinct from thehiatus semilunaris, the so-called infundibulum being,in their opinion, the upper part of the hiatus. Thenarrow opening from the frontal sinus into the hiatussemilunaris or infundibulum is sometimes known as theostium frontale. The hiatus semilunaris is boundedtoward the median line by the unciform process of theethmoid bone, this hook-like projection overlappin
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Keywords: ., bookauthoriv, bookcentury1900, bookdecade1910, booksubjectanatomy
