Applied anatomy and oral surgery for dental students . shape, with its base directed toward thenasal fossa, and its apex extending toward and sometimesinto the malar bone. Though this may be given as thet>pical shape, yet the maxillary sinus varies very muchin form and size in different individuals, and on the twosides in the same individual. The cavity is lined withmucoperiosteum surmounted by a layer of ciliated col-umnar epithelium. The roof of the maxillary sinus is formed by the orbitalplate of the maxillary bone, which separates it from theorbit. It presents a ridge of bone inclosing
Applied anatomy and oral surgery for dental students . shape, with its base directed toward thenasal fossa, and its apex extending toward and sometimesinto the malar bone. Though this may be given as thet>pical shape, yet the maxillary sinus varies very muchin form and size in different individuals, and on the twosides in the same individual. The cavity is lined withmucoperiosteum surmounted by a layer of ciliated col-umnar epithelium. The roof of the maxillary sinus is formed by the orbitalplate of the maxillary bone, which separates it from theorbit. It presents a ridge of bone inclosing the canal forthe passage of the infra-orbital vessels and nerve. Theprominence of this ridge varies in different subjects. Inthe negro race especially, where the bones are very thick,it is scarcely perceptible. 40 APPLIED ANATOMY The anterior wall is formed by the facial portion of themaxilla. It contains the anterior dental canal, trans-mitting nerves and vessels to the incisor teeth. The floor of the maxillary sinus is composed of the \ rontalbinus. Fig. lo.—Transverse section of face, showing probe passing from maxillary sinusthrough ostium maxillare and liiatus semilunaris into frontal sinus (Cryer). alveolar process. It presents conic elevations corres-ponding to the apices of the roots of the molar and some-times of the premolar teeth. It may also present partialsepta extending transversely. Complete septa are neverfound in the maxillary sinus. BONES 41 The posterior wall of the maxillary sinus is formed bythe zygomatic plate of the maxilla, which separates itfrom the sphenomaxillary fossa. The proximal or nasal wall is formed chiefly by themaxilla, aided by the inferior turbinated, ethmoid, andpalate bones (Fig. 11). This partition separates the
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Keywords: ., bookauthoriv, bookcentury1900, bookdecade1910, booksubjectanatomy
