Table 3.

Meta-analysis outcomes in onset time of pulpal anaesthesia

Comparison	Number of studies included	Mean difference (95% CI)	P	Heterogeneity (I2) %
3% Plain mepivacaine versus 2% lidocaine with 1:100,000 adrenaline	317., 19., 21.	−1.13 (−1.77–0.49)	0.0005	0
3% Plain mepivacaine versus 2% lidocaine with 1:50,000 adrenaline	217., 19.	−0.83 (−1.40–0.26)	0.004	0
2% Mepivacaine with 1:20,000 levonordefrin versus 2% lidocaine with 1:100,000 adrenaline	122	0.20 (−2.87–3.27)	0.90	_
2% Mepivacaine with 1:100,000 adrenaline versus 2% lidocaine with 1:100,000 adrenaline	230., 31.	−0.19 (−0.57–0.20)	0.34	0