Maxilla : easy and short handout for oral examination

Maxilla

1.       Anatomical points:

·         Frontal process of maxilla is directed upward and medially

·         Palatine process is directed medially

·         Alveolar process is directed inferiorly  

2.       Morphological type:  Pneumatic irregular bone

3.       Ossification : intra membranous ossification

4.       Development: neural crest

5.       Parts:

·         four processes :

·         Frontal process of maxilla : it is directed upward and articulate with nasal notch of frontal bone, situated in between nasal bone and lacrimal bone

·         Zygomatic process of maxilla: is directed laterally  and articulate with zygomatic bone

·         Palatine process of maxilla: lies horizontally and directed medially. it is articulated with opposite palatine process of maxilla and formed anterior 2/3 of hard palate

·           Alveolar process of maxilla : it is directed downward , by uniting opposite maxilla it is formed alveolar arch forms upper jaw

·         Body of maxilla:

·         Anterior surface

·         Posterior surface

·         Orbital surface

·         Nasal surface

·         Foramen : infra orbital foramen : transmit infra orbital nerve and vessels

·         Identify following bony impression : maxillary hiatus , ethmoidal  and conchal crest and nasolacrimal groove, maxillary tuberosity ,

·         Show the attachment   of buccinator muscle  

6.       How maxillary hiatus is reduced in size?

·         It is reduced by

·         From above : Uncinate process of ethmoid and Descending process of lacrimal bone

·         From below : maxillary process of inferior nasal concha

·         From behind: maxillary process of perpendicular plate of palatine bone

7.       Dentoalveolar joint: Gomphosis variety of fibrous joint

8.       Related questions :

9.       Maxillary sinus: lining epithelium, functions, in which nasal meatus it is open? 

10.   What is intermaxillary segment? Mention its derivatives