. Cunningham's Text-book of anatomy. Anatomy. THE FACE. 1379 (2) through the canine fossa, lateral to the prominence caused by the root of the canine tooth; or (3) through the lateral wall of the inferior meatus of the nose. In an antero-posterior skiagram of the skull, the shadow of the maxillary sinus presents a pyramidal outline, the base corresponding to the floor of the orbit and the rounded apex to the alveolar recess of the sinus. Sometimes the floor of the sinus extends medially, below the floor of the nose, into the palatine process of the maxilla so as to form a distinct palatine rec
. Cunningham's Text-book of anatomy. Anatomy. THE FACE. 1379 (2) through the canine fossa, lateral to the prominence caused by the root of the canine tooth; or (3) through the lateral wall of the inferior meatus of the nose. In an antero-posterior skiagram of the skull, the shadow of the maxillary sinus presents a pyramidal outline, the base corresponding to the floor of the orbit and the rounded apex to the alveolar recess of the sinus. Sometimes the floor of the sinus extends medially, below the floor of the nose, into the palatine process of the maxilla so as to form a distinct palatine recess. The medial outline of the sinus area is formed by the foreshortened shadow of the nasal wall of the sinus and the lateral pterygoid lamina, while laterally it is outlined by the zygomatic bone. The petrous portion of the temporal bone throws a deep shadow across the superior half of the sinus. In taking the skiagram, therefore, the head should be placed in such a position that this shadow is raised as much as possible into the orbits. In the living subject the inferior and medial portion of the outline of the maxillary sinus is considerably obscured by that caused by the cervical portion of the vertebral column (Killian). In a profile skiagram of the facial region of the dried skull, the shadow of the outline of the maxillary sinus is well defined. It is represented below by the dense horizontal shadow of the hard palate which crosses the tips of the roots of the molar teeth. Above it is limited anteriorly by the dark curved shadow of the floor of the orbit, while above and posteriorly is the shadow of the posterior ethmoidal-cell area. Behind the maxillary area are the vertical linear shadows of the pterygoid laminae overlapped by that of the coronoid process of the mandible. The anterior part of the sinus area is overlapped and to a considerable extent obscured by the shadow caused by the denser and somewhat triangular shadow of the zygomatic bone. Lips.âIn compressing
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
