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Lookup NU author(s): Dr Ian Corbett, Aesa Jaber, Professor John Whitworth, Dr John Meechan
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Background The authors conducted a study to compare the efficacy of the anterior middle superior alveolar (AMSA) nerve block with that of the infra orbital nerve block (IONB) in achieving pulpal anes them in the anterior maxilla Methods Twenty eight healthy adult volunteers received 1 0 milliliter of 2 percent lidocaine with 1 80 000 epinephrine as an AMSA nerve block or IONB via computer controlled local anesthetic delivery (CCLAD) across two visits The authors used electronic pulp testing to measure pulpal anesthesia Participants provided subjective reports of hp numbness and injection discomfort The authors analyzed the data by using the McNemar Mann Whitney and t tests Results Anesthetic success defined as two or more consecutive episodes of no sensation m response to maximal stimulation was significantly greater with the AMSA nerve block than with the IONB in central (P = 012) and lateral (P < 001) incisors however anesthesia was achieved in only 429 percent of central incisors with the AMSA nerve block The authors observed a significantly greater number of episodes of no response m the premolar and canine teeth after IONB Onset of anesthesia was shorter after ION,B in canines (P = 002) and central incisors (P = 022) The incidence of subjective hp numbness was 100 percent after IONB and 143 percent after AMSA nerve block (P < 001) with numbness lasting twice as long after IONB (P = 019) The authors noted no significant difference in injection discomfort between the two techniques (P = 768) Conclusions The IONB produced anesthetic success in canine and premolar teeth With a more rapid onset than that for the AMSA nerve block Although the AMSA technique was significantly more successful than IONS m attaining incisor anesthesia it was ineffective for central incisors as assessed according to rigorous electronic pulp testing The IONB and AMSA nerve block Produced similar levels of injection discomfort
Author(s): Corbett IP, Jaber AA, Whitworth JM, Meechan JG
Publication type: Article
Publication status: Published
Journal: Journal of the American Dental Association
Year: 2010
Volume: 141
Issue: 12
Pages: 1442-1448
Print publication date: 01/12/2010
ISSN (print): 0002-8177
ISSN (electronic): 1943-4723
Publisher: American Dental Association
URL: http://jada.ada.org/content/141/12/1442
