The effect of maxillary first molar root length on the success rate of buccal infiltration anesthesia.

Ehsan Askari, Masoud Parirokh, Nouzar Nakhaee, Hamid Hosseini, Paul Abbott

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Introduction: Several variables may influence anesthesia success in maxillary molars. This investigation was conducted to evaluate the effect of root length on the success rate of infiltration injections of 2% lidocaine with 1:80,000 epinephrine. Methods: One hundred maxillary first molars with irreversible pulpitis were treated. After the administration of a buccal infiltration injection of 2% lidocaine with 1:80,000 epinephrine, the patients’ pain during dentin cutting, pulp exposure, and root canal instrumentation were evaluated using the Heft-Parker visual analog scale. No or mild pain was considered as success. Data were analyzed by the point-biserial correlation test and receiver operating characteristic curve analysis. Results: Overall, 61% of the teeth had successful anesthesia after the administration of a single buccal infiltration injection of anesthetic solution. The point-biserial correlation test showed that the teeth that had palatal and distobuccal roots with longer root lengths showed significantly higher anesthesia failure (P < .05). However, receiver operating characteristic curve analysis did not show a clinically useful cutoff point of root length corresponding with anesthesia failure. Conclusions: Maxillary first molars having irreversible pulpitis with longer roots may have more anesthesia failures after a single buccal infiltration injection with 2% lidocaine and 1:80000 epinephrine.
Original languageEnglish
Pages (from-to)1462-1466
Number of pages5
JournalJournal of Endodontics
Volume42
Issue number10
DOIs
Publication statusPublished - 2016

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