[Local anesthesia failure problems in conservative dental therapy clinic].

There were evaluated the prevalence of local anesthetic injection failure in therapeutic dentistry. 121 practitioners were interrogated using a special questionnaire. In the second stage of our study 447 teeth in caries and pulpitis patients were treated using articaine based local anesthesia. Results showed that anesthesia failure problem is still important. Prevalence of anesthesia failure differs depending on dental diagnosis and number of tooth. It is more for pulpitis in comparison with caries. The most difficult for achieving adequate anesthesia teeth are lower molars.