Nerve block analgesia is a mainstay for pain control in dentistry. It is relatively safe but can occasionally have complications.


Complications of dental nerve block analgesia:

(1) necrosis, which may extend into adjacent bone

(2) ulceration

(3) pain

(4) paresthesias

(5) infection


Risk factors for complications:

(1) operator error (inexperienced, error in judgment, ignorance, etc)

(2) inclusion of epinephrine in the anesthetic mixture

(3) inclusion of another toxic agent in the anesthetic mixture

(4) making a subperiosteal injection

(5) injecting too much fluid into a confined space, resulting in a localized compartment syndrome

(6) intra-arterial injection


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