Anaesthetic Efficacy of 4% Articaine in Comparison with 2% Lidocaine as Intraligamentary Injections after an Ineffective Inferior Alveolar Nerve Block in Mandibular Molars with Irreversible Pulpitis: A Prospective Randomised Triple-Blind Clinical Trial

Table 1

Success rates and confidence intervals of supplemental intraligamentary injections with lidocaine and articaine in the mandibular first and second molars.

	Total	Lidocaine	Articaine	Success ratio(95% CI)	value	Effect size	Power
First molar; 95% CI^1	59.4% (19/32); 0.41 to 0.77	62.5% (10/16); 0.36 to 0.89	56.3% (9/16); 0.29 to 0.84	0.9 (0.5–1.6)	1.000	0.064	0.065
Second molar; 95% CI	90.6% (29/32); 0.80 to 1.00	81.3% (13/16); 0.60 to 1.00	100% (16/16); —	1.2 (0.9–1.5)	0.226	0.322	0.445
Total; 95% CI	75% (48/64); 0.64 to 0.86	71.9% (23/32); 0.63 to 0.93	78.1% (25/32); 0.55 to 0.88	1.1 (0.8–1.4)	0.564	0.072	0.089
Success ratio (95% CI)	0.6 (0.5–0.9)	0.8 (0.5–1.2)	0.6 (0.4–0.9)
value	0.004	0.433	0.007
Effect size	0.361	0.209	0.529
Power	0.823	0.219	0.849

The success ratio of the lidocaine group to articaine group. ¹CI: confidence interval.