From: In vivo assessment of the impedance ratio method used in electronic foramen locators
Position of file tip using RL as reference [mm] (number of canals studied in vivo) | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
-3.0 (7 canals) | -2.5 (7 canals) | 2.0 (7 canals) | -1.5 (7 canals) | -1.0 (18 canals) | -0.5 (14 canals) | 0 (21 canals) | ||||||||
Frequency [Hz] | Mean | STD | Mean | STD | Mean | STD | Mean | STD | Mean | STD | Mean | STD | Mean | STD |
250 (Z6) | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 |
500 (Z5) | 0,929 | 0,024 | 0,935 | 0,021 | 0,931 | 0,022 | 0,923 | 0,019 | 0,917 | 0,021 | 0,899 | 0,020 | 0.861 | 0.019 |
1000 (Z4) | 0,862 | 0,037 | 0,869 | 0,036 | 0,862 | 0,035 | 0,850 | 0,033 | 0,839 | 0,033 | 0,808 | 0,035 | 0.724 | 0.030 |
2000 (Z3) | 0,789 | 0,044 | 0,797 | 0,044 | 0,789 | 0,041 | 0,775 | 0,039 | 0,759 | 0,041 | 0,722 | 0,045 | 0.598 | 0.028 |
4000 (Z2) | 0,772 | 0,049 | 0,784 | 0,051 | 0,772 | 0,047 | 0,756 | 0,048 | 0,735 | 0,048 | 0,694 | 0,053 | 0.533 | 0.023 |
8000 (Z1) | 0,712 | 0,056 | 0,747 | 0,077 | 0,711 | 0,066 | 0,692 | 0,071 | 0,669 | 0,062 | 0,634 | 0,069 | 0.454 | 0.032 |