Bones Flashcards
Bones of face
- Mandible
- Two maxillae
- Two zygomatic(cheek bones)
- Vomer
- Two palatine
- Two nasal
- Two lacrimal
- Two inferior nasal conchae
Maxilla shape
- Large hollow body
- Four projecting processes of bone
Parts of maxillae
- Body
- Maxillary sinus/antrum
- Bony processes
Shape of body of maxilla
- Four sided, hollow pyramid
- Base oriented vertically toward nasal cavity
-Apex extending laterally toward Zygomatic bone
Superior portion of maxilla forms
Floor of orbit of eye(location of infraorbital fissure which becomes infraorbital canal)
-(Infraorbital nerves and vessels exit canal on face through infraorbital foramen)
Foramen on the anterior surface of body of maxilla
Infraorbital foramen
Sinus
-Hollow space within bones
-Found on Sphenoid, Frontal, Ethmoid and Maxilla bones
Function of maxillary sinus
(a) lighten the skull, (b) give resonance to the voice, (c) warm breathed air (d) moisten the nasal cavity
Capacity of maxillary sinus
15ml/1 tablespoon
Shape of Maxillary sinus
- Large four sided, pyramid shaped cavity
- On body of each maxilla
Importance of Maxillary sinus and teeth
-Sinus floor extends onto superior portion of maxillary alveolar process(apices of molar and premolar roots found)
-Very thin bone between sinus and roots or no bone replaced with PDL fibres
Enter the maxilla and sinus
- Nerves to maxillary molars(PSA nerve)
- Enter through alveolar canals
can be mistaken for tooth pain
Infection in sinus
Maxillary sinus opens into
-Nasal cavity from anterosuperior wall
Bony processes of each maxilla
–Frontal(nasofrontal)process
-Zygomatic process
-Alveolar process
-Palatine process
