Posterior superior alveolar nerve
|Posterior superior alveolar nerve|
A sketch of the Posterior Super Nasal Nerve
|Latin||rami alveolares superiores posteriores nervi maxillaris|
|Innervates||maxillary sinus, molars, dental alveolus|
|Anatomical terms of neuroanatomy|
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 then enter the 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 apical foramina at 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). When giving a posterior superior alveolar nerve block, it will anesthetize the mesialbuccal root of the maxillary first molar approximately 72% of the time.
- cranialnerves at The Anatomy Lesson by Wesley Norman (Georgetown University) (V)
- lesson9 at The Anatomy Lesson by Wesley Norman (Georgetown University) (latnasalwall4)
- MedEd at Loyola GrossAnatomy/h_n/cn/cn1/cnb2.htm
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