the duration of anesthesia with 4% lidocaine was longer than that with 2% (228 ± 55 min vs. 207 ± 54 min), although this was not significantly different.
4% lidocaine along with 1:100,000 epinephrine
2% lidocaine along with 1:100,000 epinephrine
the intensity of intra-operative pain during the administration of the drug