The Journal of the American Dental Association
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J Am Dent Assoc, Vol 123, No 1, 69-73.
© 1992 American Dental Association
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Journal of the American Dental Association, Vol 123, Issue 1, 69-73
Copyright © 1992 by American Dental Association

Journal Article

Reasons for local anesthesia failures



MK Wong and PL Jacobsen
University of the Pacific, School of Dentistry, San Francisco.

U.S. dental practitioners administer about 4,000,000 local anesthetic blocks and infiltrations annually. The failure rate to achieve adequate anesthesia for the procedure is estimated to be 5 percent to 15 percent. This article describes five different categories of failures and suggest ways to troubleshoot them.




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