Local Infiltration (Dental)

Local Infiltration (Dental) is a type of local anaesthesia in which a small amount of anaesthetic is injected into the soft tissues close to the terminal branches of sensory nerves that supply a specific tooth or small area of the mouth. It creates a reversible loss of sensation limited to the immediate site, making it suitable for procedures that affect one or a few adjacent teeth rather than an entire jaw.

The technique is usually quick and effective, with onset in minutes and a duration that depends on the agent used, such as lidocaine or articaine. Side effects are generally minor and temporary, including numbness, mild swelling or bruising at the injection site, and patients are advised to avoid biting lips or cheeks while numb; clinicians assess medical history and explain aftercare to reduce rare risks like prolonged numbness or allergic reactions.