Page 39 - Edited - Webster HEAD AND NECK - part 2-Merge PDF

HN 237
NERVE BLOOD SUPPLY OF LOWER TEETH
The acterial blood supply/venous drainage are to/from the

MAXILLARY ARTERY & VEIN ( ). These inferior alveolar vessels
enter/leave the alveolar canal at the MANDIBULAR FORAMEN ( )
accompanied by the INFERIOR ALVEOLAR NERVE (VI).

Notice at A the LINGUAL N. INFERIOR
ALVEOLAR N (V1)
close proximity of the (V1)
canal to the roots
of the third molar
(“Wisdom") tooth: extraction FACIAL NERVE
of this tooth after can damage (VII)
The inferior alveolar n.,

PAROTID
SALNARY
GLAND

A

INF. ALVEOLAR
CANAL FOR CANAL, NERVE TO MYLOHYOID m.
MENTAL NERVE CONTAINING INF. (& ANT. BELLY DIGASTRICM.)
ALVEOLARN. & VESSELS

anessthetiging the recovery teeth and also the their of the chin
& lower lip (mental nerve).
Notice that injection of local anaesthetic for an inferior dental

block will amaesthetize notony The inferior alveolar nerve,
but also the lingual nerve : oral tongue & remaining oral
floor will also be anoscretized. The chin & lower lip will
also be anaesthetic (mental nerve) -
Notice that advancing the hypothamic needle too for will

introduce local anaesthetle into the parotid salivary gland
and paralyze (temporarily, you hope) the facial nerve, producing
at least partial facial palsy. (This DOES happen!).

Notice the depthe of the tooth sockets: after extraction of a tooth
a sochet fills with "woven" bone BUT if regular “exercise”
pressure (e.g. by of bridge) is not applied, the alvedar bone
will resorts: the alvedor margin receeds by ¼ to ½ the full
depth of the mandibular body. This is why to the mansibles
of the chronically edentulous, look to bone narrow bodies.
COMPARE with pterygopalatine block - K.E.W.