Answer :
Both statements are true that the smaller-diameter nerve fibers associated with supraperiosteal injections are more sensitive to local anesthetics.
Supraperiosteal injection (commonly called native infiltration) is indicated whenever dental procedures are confined to a localized space in either the jaw or jawbone. The terminal endings of the nerves innervating the region square measure anaesthetised.
A-fibers is one of the larger-diameter nerve fibers, with the thickest myelination and quickest physical phenomenon speed, and act as sensory and motor fibers at intervals the physical systema nervosum. The diameter of dorsal roots from T1 to S5 was largest at S1 (2.95 ± 0.57 mm) and smallest at S5 (0.27 ± 0.13 mm), respectively.
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