Posterior superior alveolar nerve
- Posterior superior alveolar nerve
Infobox Nerve
Name = PAGENAME
Latin = rami alveolares superiores posteriores nervi maxillaris
GraySubject = 200
GrayPage = 890
Caption = Distribution of the maxillary and mandibular nerves, and the submaxillary ganglion. (Posterior sup. alveolar labeled at center.)
Caption2 =
Innervates = maxillary sinus, molars, dental alveolus
BranchFrom =
BranchTo =
MeshName =
MeshNumber =
DorlandsPre = r_02
DorlandsSuf = 12688688
The posterior superior alveolar branches (posterior superior dental branches) arise from the trunk of the maxillary nerve just before it enters the infraorbital groove; they are generally two in number, but sometimes arise by a single trunk.
They descend on the tuberosity of the maxilla and give off several twigs to the gums and neighboring parts of the mucous membrane of the cheek.
They then enter the posterior alveolar canals on the infratemporal surface of the maxilla, and, passing from behind forward in the substance of the bone, communicate with the middle superior alveolar nerve, and give off branches to the lining membrane of the maxillary sinus and gingival and dental branches to each molar tooth from a superior dental plexus; these branches enter the foramina at the apices of the roots of the teeth.
The posterior superior alveolar nerve innervates the second and third maxillary molars, and two of the three roots of the maxillary first molar (all but the mesiobuccal root).
ee also
* posterior superior alveolar artery
* anterior superior alveolar nerve
=Additional
External links
* (NormanAnatomyFig|V)
* (NormanAnatomyFig|latnasalwall4)
*
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