. Regional anesthesia : its technic and clinical application . uscle and to the anterior belly of the digastric muscle,and filaments to the oral mucosa and periosteum. During its coursethrough the inferior dental canal it gives off numerous branches whichinosculate to form the inferior dental plexus, supplying twigs to themolars and bicuspids. On reaching the mental foramen the inferiordental nerve gives off the incisor nerve, which continues its course withinthe mandible to the midline, supplying the canine and incisor teeth. lOO REGIONAL ANESTHESIA The mental nerve supplies the skin and inte
. Regional anesthesia : its technic and clinical application . uscle and to the anterior belly of the digastric muscle,and filaments to the oral mucosa and periosteum. During its coursethrough the inferior dental canal it gives off numerous branches whichinosculate to form the inferior dental plexus, supplying twigs to themolars and bicuspids. On reaching the mental foramen the inferiordental nerve gives off the incisor nerve, which continues its course withinthe mandible to the midline, supplying the canine and incisor teeth. lOO REGIONAL ANESTHESIA The mental nerve supplies the skin and integument and mucous mem-brane of the lower Up; it overlaps the midline just like all the othersjTnmetric nerves of the body. The anatomy of the mandible should be studied very closely beforeany attempt is made to block the inferior dental and lingual facing the bone in its natural position (Fig. 72), and consideringthe ascending ramus on either side, one can see behind the last molartooth a smooth triangular surface, the retromolar trigone (Braun),. Fig. 72.—Front view of the mandible, with special reference to the retromolar trigoneand medial aspect of the ascending ramus. bounded on each side by the external and internal oblique lines. Theexternal oblique line forms the anterior edge of the ascending ramusand is in the majority of cases sharp, while the internal oblique lineis very often blunt and smooth. The retromolar trigone lies a littleoutward of the general direction of the lateral aspect of the dental medial aspect of the ascending ramus is hidden by the retromolartrigone when facing the mandible; but when looking at the bone a littlelaterally it is seen to be in the plane passing through the space betweenthe central incisors, sometimes through the canine on the opposite side; BLOCKING or CRANIAL NERVES and one can easily see the lingula (spine of Spix) which overlaps theinferior dental foramen at the entrance of the inferior dental canal. When fac
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