Preferred Label : posterior superior alveolar nerve;
Uberon definition : 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 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.;
Uberon synonym : posterior superior dental nerve;
Uberon related term : posterior superior alveolar branches;
Origin ID : 0018401;
Automatic exact mappings (from CISMeF team)
- Uberon cross reference
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 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.
