Oral surgery
Lac. Innervation
-The posterior superior alveolar nerve.
It decending from the main trunk of maxillary N.in the pterrgopalatine fossa befor the maxillary devision inter infra orbital fissure.this N. will pass down ward through the pterigoplatin fossa.they reach the post. Surface of maxilla.gives 2 branchs.
one remains external of bone&supply sensory innervintion to the buccal gingival in the max. molars&odjacent facial sursafe.
The other branch the maxilla along with a branch of internal max. artery to inter maxillary sinus.
Branches in the infra orbital canal
Within the canal ,the v2 gives the middle sup.&ant. Sup. Alveolar nerves. The N in the infra orbital grove&canal is called infra orbital nerves .
Denal plexuse
Terminal branches of long nerves forms anerve network to inn. Root of teeth,bone &PDL in both maxilla and mandible.
?Summary of the branches of V3
1-Undevided N.(main trunk)
A-nervous spinosus
B-N. to med pterygoid muscle.
2-Devided nerve
a-ant. Division
• N. to lateral pterygoid muscle.
• N. to the masseter muscle.
• N.to the temporal muscle .
• N. to buccal .or buccal nerve
b-posterior division.
I. Articulo temporal nerve.
II. Lingual nerve.
III. Mylohyoid nerve.
IV. Inferior alveolar nerve (dental branches)
V. Mental nerve.
VI. Incisive branch.
long buccal nerve
? wholly sensory , branch of ant.division of V3.
? Passes between 2 head of the lat. Pterygoid muscle at the level of occlusal plane.
Ligual nerve
? The 2end branch of the posterior division of V3
? It passes downwards medial to the lateral pterygoid muscle.
? It lies between the ramus of mandible&the medial pterrygoid muscle.
? Reach the side of the base of the tongue.
? Slighty below &behind the mand.3rd molar
? Provide general sensation for
? All ligual gingival
? Mucosa of the floor of mouth.
? The ant. Two third of the tongue(sens&taste)
The inferior alveolar nerve
? Abranch of mandibular division,
? it passes medial to lateral pterygoid muscle.
? Posterior to lingual nerve.
? It gives the mylohyoid m.
? With the inferior alveolar artery&vein inter the mandibular canal
? Through the mandibular foramen.
The mental nerve
? It exite the man. Through mental foramen
? Located several mm inf. To the apex of the 2nd premolar
? Or slightly anterior or posterior.
? It devided into 3 branches
? Inn. The skin of the chin+lower lip+mucos membrane of lower lip.
The incisive nerve
It remains within the man. Canal
Form anerve plexus
Innervat the pulpal tissue of the mand. 1st premolar ,canine&incisor via dental branches.