Fig. 1
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs42269-022-00772-6/MediaObjects/42269_2022_772_Fig1_HTML.png)
Flow chart of the patients enrolled in the study. Group A: Infiltration injection was performed using 4% Alexadricaine*. Group B: Infiltration injection was performed using 2% Mepecaine-L**. (4% Alexadricaine and 2% Mepecaine-L manufactured by Alexandria co. for pharmaceuticals—Egypt)