BLOOD-VESSELS OF THE TEETH. 261 



terminate by sending off several brandies. Its branches 

 supplying the teeth are, 



1. The superior dental or alveolar. 



2. Infra orbitar. 



3. Inferior dental or maxillary. 



The superior dental artery comes off from the internal 

 maxillary, at its entrance into ihepterygo maxillary fossa; 

 it then winds round the maxillary tuberosity, sending 

 branches through the posterior dental canals to supply the 

 molares and the antrum, and finally proceeds forward upon 

 the alveolar processes, supplying their cavities, and the 

 gums. Those branches going to the teeth enter by the 

 foramen at the apex of the roots, and are distributed over 

 the pulps. 



The infra-orbital artery arises from the internal maxil- 

 lary in the upper part of the pterygo maxillary fossa, enters 

 the infra orbital canal, traverses its whole extent along 

 with a nerve of the same name, and emerges upon the 



3 Posterior mental foramen, which gives passage to the inferior dental artery. 



4 Anterior mental foramen, where the same artery makes its exit. 5 5 The 

 anterior and inferior wall of the superior maxilla removed, so as to exhibit 

 the antrum, roots of the teeth, and arteries supplying each. 6 Infra-orbitar 

 foramen, for the passage of the infra-orbitar vessels. 8 Nasal process of su- 

 perior maxilla. 9 Pterygoideus intejnus muscle. 10 Angle of inferior max- 

 illary bone. 11 Orbit of the eye. 12 Superior thyroid artery. 13 13 Facial 

 artery. 14 Terminating branch of the lingual. 15 Where the external carotid 

 terminates by dividing into the internal maxillary and temporal. 16 Temporal 

 artery. 17 Internal maxillary. 18 18 Inferior dental artery. 19 Deep temporal 

 branch. 20 Transverse artery of the face. 2121 Muscular branches. 22 Alve- 

 olar branch. 23 Posterior dental branch. 24 Where the infra orbital artery 

 terminates. 25 Nasal branch of the facial. 26 Sub-mental branch. 



FIG. 73, B represents chiefly the external carotid artery, and its branches 

 which supply the exterior head, face, and part of the neck. 1 Common ca- 

 rotid artery. 2 External carotid. 3 Internal carotid. 4 Superior thyroid. 



5 Lingual. 6 Facial branches of external carotid. 7 Sub-mental. 8 Inferior 

 coronary. 9 Superior coronary branches of facial. 10 Occipital. 11 Infe- 

 rior pharyngeal branches of external carotid. 12 12 13 Branches of occipital. 

 14 Posterior-auricular branch of external carotid. 15 Transverse facial. 16 

 Posterior temporal. 17 Middle temporal. 18 Anterior temporal branches of 

 the temporal artery. 19 Supra orbitar, a branch of the ophthalmic. 20 Sub- 

 clavian, a branch of the arteria innominata on the right, and the aorta on the 

 left. 



