Effect of cell phone radiation on determination of exact working length with two different generations of electronic apex locator”- an in-vivo study

Abstract

Introduction: Electronic apex locators (EALs) are now being used for accurate working length measurements but it can be affected by electromagnetic waves. The aim of the study was to evaluate and compare the cell phone radiation effect on determination of exact working length with two different generations of electronic apex locators.

Materials and methodology: Thirty-two single rooted mandibular premolars (Vertucci’s Type I) were selected. After pre-op and working length IOPA, working length was measured with two electronic apex locators (Root ZX; third generation and Propex II; fifth generation). Smart phone (Samsung galaxy Note Edge) was used to evaluate the interference. Electronic working length was determined under four different conditions; Group I -No mobile present within 2 feet radius of the dental chair, Group II- mobile placed next to EAL with Wi-Fi and Bluetooth activation Group III - mobile placed next to EAL in standby mode, and Group IV - mobile placed next to EAL activated by calling mode for 25 sec, in a closed room (9 feet × 9 feet).

Result: Intergroup and intragroup comparison had no statistically significant difference when the above-mentioned groups were compared.

Conclusion: Apex locators worked efficiently even in the presence of cell phone.