Paranasal or Sphenoid Sinuses (pair)
4 pairs of cavities in the bones around nasal cavity Behind maxillae
project down from body of Sphenoid, just behind Maxillae. Med. & Lat. Pter. plates.
largest, most troublesome of paranasal sinuses. Form thin wall of bone btw roots of maxillary posterior teeth & sinus spaces themselves.
anterior nasal spine
Small projection of maxillae at the bottom of the nasal aperture. Lower end, front nasal cavity. (landmark often used in ortho. xrays)
behind Maxillae 3rd molars. Posterior bulge of bone. Blood vessels, nerves enter bone to supply posterior teeth n part of maxill. sinus, much growth of maxil. takes place.
Insufficient growth of Maxillary Tuberosity
inadequate room for wisdom teeth to erupt & Maxil. may be shorter than should be. Mandible looks more forward, cause Class III occlusion.
Hiatus or Ostium of maxillary sinus
opening into nasal cavity, varies in size. Medial view of Maxillae.
slightly narrowed area just beneath condyle of mandible, which articulates with temporal bone to make TMJ
Bony projection at upper anterior ramus of mandible; point of attachment for temporal muscle. Just anterior to Cor. Notch.
External Oblique Line
anterior border of ramus ends here. Shows up as radiopacity on posterior periapical or pantographic radiographs.
Sublingual & Submandibular fossae
2 depressions in bone, toward anterior part of Myloh. line-one above, one below the line. Glands lie in these depressions.
Superior & Inferior Genial Tubercles or Mental Spines
2 small, grouped projections at midline, one above, one below. Attachments for muscles that aid in tongue movement & swallowing - Genioglossus, Geniohyoid.
just below Genial projections at inferior border of mandible. Pts of attachment for anterior digastric muscle.
Lingula is pt of attachment. Location & size may affect success of anesthetic injections in area.
Another name for each: