[Aspiration in intraligamentous anesthesia].

The authors conducted a prospective, randomized, crossover study of positive aspiration frequency in intraligamentous anesthesia (ILA). The aims of the study were (1) to determine the frequency of positive aspiration in ILA and (2) to evaluate the depth of the pulp anesthesia in lower first molar (L6) by means of electrotesting in positive or negative aspiration. Intraligamentous injections with 4% articaine with epinephrine in L6 were carried out with computer syringe in 36 dental students.