part of part of connecting branch of system maxillary artery artery posterior superior alveolar artery Wikipedia:Posterior_superior_alveolar_artery UBERON:0018397 superior posterior alveolar artery FMA:49757 The posterior superior alveolar artery (posterior dental artery) is given off from the maxillary, frequently in conjunction with the infraorbital just as the trunk of the vessel is passing into the pterygopalatine fossa.