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. 2022 Aug 16;9:974056. doi: 10.3389/fmed.2022.974056

Table 3.

Time needed to open SC for both groups. Excluding the cases wherein penetration occurred and resulted in failed identification of the canal.

Laser surgery group
(N = 21) 		Conventional surgery group
(N = 20) 		p †
• Mean (SD) Median
(P25, P75) 		• Mean (SD) Median
(P25, P75)
Time needed to open the canal (second) 49.33 (25.23) 40.0 (30.0, 65.0) • 116.50 (31.79) 111.5 (93.3, 139.8) <0.001

†Wilcoxon Mann-Whitney tests (Time needed to open the canal non-normally distributed in any group).