Objectives: This study aims to assess the knowledge level, behavior, and attitude of dental practitioners regarding the
absolute maximum dose of local anesthetics, their MRD, and systemic complications.
Materials & Method: An electronic survey was distributed through social media platforms to dental practitioners in
Jeddah. The survey consisted of 4 sections: demographic information, knowledge, behavior, and attitude. Cronbach’s
alpha was used to test for the validity 0.86.
Results: A total of 403 participants completed the questionnaire, with a response rate of 60%. Of all, 55.8% were females.
The majority were undergraduate students 42.4%, and below the age of 25 44.9%. For the question “what is the MRD/
kg for 2% lidocaine with Epinephrine?” we found a statistically significant difference between the professional rankings
p=0.001. Although the undergraduate dentists were the least group to answer the questions “What does a 2% local
anesthetic solution mean?”, there was no statistically significant difference between those who answered correctly.
Conclusion: We found many of our participants to have false knowledge regarding the topics of LA, MRD/kg, and LAST. We
believe that the current levels are not acceptable, and that more efforts must be made to raise the knowledge pertaining
to this topic
Key words: Local Anesthesia, Knowledge, Behavior, Attitude, Local Anesthetic Systemic Toxicit
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