Anterior surface of the body of the maxilla
Encyclopedia
The anterior surface is directed forward and lateralward. It presents at its lower part a series of eminences corresponding to the positions of the roots of the teeth. Just above those of the incisor teeth is a depression, the incisive fossa, which gives origin to the Depressor alae nasi; to the alveolar border below the fossa is attached a slip of the Orbicularis oris; above and a little lateral to it, the Nasalis
arises.
Lateral to the incisive fossa is another depression, the canine fossa
; it is larger and deeper than the incisive fossa, and is separated from it by a vertical ridge, the canine eminence, corresponding to the socket of the canine tooth; the canine fossa gives origin to the levator anguli oris
(aka Caninus).
Above the fossa is the infraorbital foramen
, the end of the infraorbital canal; it transmits the infraorbital vessels and nerve.
Above the foramen is the margin of the orbit, which affords attachment to part of the Quadratus labii superioris.
Medially, the anterior surface is limited by a deep concavity, the nasal notch, the margin of which gives attachment to the Dilatator naris
posterior and ends below in a pointed process, which with its fellow of the opposite side forms the anterior nasal spine.
Nasalis muscle
The nasalis is a sphincter-like muscle of the nose whose function is to compress the nasal cartilage.It consists of two parts, transverse and alar:...
arises.
Lateral to the incisive fossa is another depression, the canine fossa
Canine fossa
Lateral to the incisive fossa is another depression, the canine fossa; it is larger and deeper than the incisive fossa, and is separated from it by a vertical ridge, the canine eminence, corresponding to the socket of the canine tooth; the canine fossa gives origin to the Caninus.-External links:*...
; it is larger and deeper than the incisive fossa, and is separated from it by a vertical ridge, the canine eminence, corresponding to the socket of the canine tooth; the canine fossa gives origin to the levator anguli oris
Levator anguli oris
The levator anguli oris is a facial muscle of the mouth arising from the canine fossa, immediately below the infraorbital foramen....
(aka Caninus).
Above the fossa is the infraorbital foramen
Infraorbital foramen
Above the canine fossa is the infraorbital foramen, the end of the infraorbital canal; it transmits the infraorbital artery, vein, and infraorbital nerve.-External links: *...
, the end of the infraorbital canal; it transmits the infraorbital vessels and nerve.
Above the foramen is the margin of the orbit, which affords attachment to part of the Quadratus labii superioris.
Medially, the anterior surface is limited by a deep concavity, the nasal notch, the margin of which gives attachment to the Dilatator naris
Nasalis muscle
The nasalis is a sphincter-like muscle of the nose whose function is to compress the nasal cartilage.It consists of two parts, transverse and alar:...
posterior and ends below in a pointed process, which with its fellow of the opposite side forms the anterior nasal spine.