Nerve supply to tongue & may anaesthetized during nerve block:
a- V
b-Vll (Facial N.)***
C- lX
d- Xll
Dental decks 1904
he said (May) so it VII by mistake
An injection into parotid capsule during nerve block injection MAY CAUSE Bell`s palsy facial expretion and The sensory portion of facial N supplies the taste to the anterior two-thirds of the tongue.
If needle is positioned too posteriorly, anesthetic may be put into parotid gland (dangerous systemic effects), or paralyse Cranial Nerve VII (7), resulting in Bell's Palsy-like symptoms. Also, if the needle is placed too medially the medial pterygoid muscle can be injected, resulting in trismus.
The sphenomandibular ligament is most often damaged in an inferior alveolar nerve block.