Table 1 Accuracy of length measurement with EAL.

From: Accuracy and stability of electronic apex locator length measurements in root canals with wide apical foramen: an ex vivo study

File used with EAL

Size of apical foramen

#60

#70

#80

#15

1.00 (±0.77)

1.70 (±1.71)

1.80 (±1.78)

#20

1.16 (±0.81)

1.7 (± 1.09)

1.90 (±1.55)

#25

1.00 (±0.81)

1.50 (±1.17)

2.70 (±1.3)

#30

0.44 (±0.52)

1.43 (±1.01)

1.91 (±1.39)

#35

0.50 (±0.47)

1.05 (±0.91)

1.64 (±1.49)

#40

0.45 (±0.43)

0.83 (±0.79)

0.93 (±1.08)

#45

0.25 (±0.35)

0.50 (±0.47)

0.60 (±0.93)

#50

0.30 (±0.42)

0.45 (±0.36)

0.75 (±0.97)

#55

0.15 (±0.24)

0.40 (±0.39)

0.40 (±0.65)

#60

0

0.15 (±0.33)

0.30 (±0.67)

#70

Not used

0.05 (±0.15)

0

#80

Not used

Not used

0

SAF

0

0

0

  1. The difference between “true length” and EAL measurement is shown in mm (±SEM).
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