Using 1.8 ml of anesthesia in inferior alveolar nerve (Spix-Technique)

Objectives: It is described to use one anesthetic tube (1.8 ml) for Spix technique. However, in clinical practice anesthesia is not achieved with this dose. The aim of this in vivo study is to evaluate the anesthetic efficacy using one tube (1.8 m) of lidocaine 2% in the truncal technique. Methods: Descriptive study. 72 patients of the SAPU-Dental-Valdivia, with indication of mandibular teeth extraction using only one tube were included. After 15' teeth were extracted. Results: measured the possibility of extracting the tooth (yes / no), pain (VAS) and gender / age association. Chi-square test was used (p <0.05) in data analysis. Results: 62 patients were attended. In 47 patients (75.8%) tooth extraction was possible with only one tube and a mean VAS of 4 (SD 2.88). There was no association between gender (p = 0.21) or age (P = 0.82) with the anesthetic effect. Conclusion: The dose demonstrated a high effectiveness. However, a percentage of patients (24%) required infiltration technique supplement.