Why does inferior alveolar nerve block anesthesia sometimes fail

Inferior alveolar nerve block anesthesia: one needle (intraoral method). It is simple and easy to use and is commonly used in the extraction of mandibular molars.

Operation note: needle direction, Angle, distance from edge height. Injection point, depth. The dosage of the drug, and the method of infusion.

Direction and Angle: The syringe is positioned at a 45 degree Angle between the injection needle and the puncture point from the opposite side above the fourth and fifth teeth.

The height from the edge of the tooth: 1 cm above the third molar.

Injection point: the tip of the cheek fat pad.

Depth: 2.5-3 cm.

Injection: 2ml, the back tip is slightly withdrawn, and the drug is injected while retreating. The inferior alveolar nerve, buccal nerve and lingual nerve were anesthetized. It'll kick in in five minutes. Individual patients with heavy inflammation will affect drug absorption. At this time, a small amount of anesthetic is injected next to the buccal teeth. Available to work.

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