The Effect of File Size and Type and Irrigation Solutions on the Accuracy of Electronic Apex Locators: An In Vitro Study on Canine Teeth

Table 1

Basic statistics of the measurement results of the distance between the instrument and the apical constriction performed in the 5.25% NaOCl environment with the use of steel S-files (Poldent) with the size ranging from 08 to 30 in accordance with ISO and with the use of two apex locators: Endopilot and iPex NSK as well as the results of comparison made with the use of Student’s -test for dependent variables.

Instrument size	Endopilot	iPex NSK
mm, ⌀8 mm	3.23 ± 0.03	2.58 ± 0.03	27.577	<0.001
mm, ⌀10 mm	2.93 ± 0.12	2.22 ± 0.10	7.985	0.001
mm, ⌀15 mm	3.02 ± 0.12	2.07 ± 0.15	8.593	0.001
mm, ⌀20 mm	2.58 ± 0.10	2.00 ± 0.05	8.750	0.001
mm, ⌀25 mm	2.48 ± 0.06	1.98 ± 0.03	13.416	<0.001
mm, ⌀30 mm	2.08 ± 0.06	1.88 ± 0.13	2.370	0.077
mm, ⌀8 mm	1.82 ± 0.08	1.70 ± 0.10	1.606	0.184
mm, ⌀10 mm	1.73 ± 0.15	1.67 ± 0.03	0.499	0.499
mm, ⌀15 mm	1.52 ± 0.06	1.38 ± 0.03	3.578	0.023
mm, ⌀20 mm	1.37 ± 0.03	1.30 ± 0.05	2.000	0.116
mm, ⌀25 mm	1.25 ± 0.00	1.23 ± 0.03	1.000	0.374
mm, ⌀30 mm	1.12 ± 0.08	1.22 ± 0.03	−2.121	0.101
mm, ⌀8 mm	1.48 ± 0.08	1.38 ± 0.03	2.121	0.101
mm, ⌀10 mm	1.38 ± 0.08	1.32 ± 0.03	1.414	0.230
mm, ⌀15 mm	1.15 ± 0.05	1.03 ± 0.03	3.500	0.025
mm, ⌀20 mm	0.93 ± 0.03	0.83 ± 0.03	4.243	0.013
mm, ⌀25 mm	0.78 ± 0.03	0.62 ± 0.03	7.071	0.002
mm, ⌀30 mm	0.53 ± 0.03	0.52 ± 0.03	0.707	0.519