to the inability to induce effective conduction blockade.

The term failure in local anesthesia refers

Troubleshooting anesthetic failures
LA

anatomy, choice of LA, technique, infection, patient perception

Administration
Volume considerations
Psychological barriers
Physical barriers
Chemical barriers
Anatomic barriers
Suggestions

Higher gauge = smaller diameter
Smaller diameter = deflection
Deeper injection = more deflection
In reality - not super significant for dental injections

Despite high quality control standards in the U.S. it&#039;s not impossible to have entire batches or &#039;lots&#039; go bad or become affected in some way
Shipping, handling, storage
Shelf-life - expired cartridges may become slightly more acidic

Total volume must be adequate to immerse targeted neurons
Mandibular injections (IA, GG, VA) require higher volumes
Most maxillary blocks and infiltrations require less

Consider treatment plan
Soft tissue always remains numb longer than pulp tissue
Utilize appropriate LA for procedure
2% Lido vs 4% Septo vs 0.5% Bupiv

Fear of dentistry
Phobias of needles
Involvement of parents or family
Perceived bad past experience

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Troubleshooting anesthetic failures
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Troubleshooting anesthetic failures LA