As a result of modern electronic digital circuits, the manufacturer claims that this device has more consistent readings than its predecessors (Serota et al. 2004). Nevertheless, the fundamental principle of all the ERCLMDs is the same, i.e. an electrical model is assumed and the characteristics of that model are measured to diagnose the clinical properties. Based on clinical observations, Vera & Gutierrez (2004) reported that when using the ElementsTM Diagnostic Unit the file should be withdrawnto the 0.5 mm mark instead of the 0.0 mm mark to achieve the accurate identification of the apical constriction that they assumed should be 0.5 mm shortof the external (major) foramen. Therefore, taking the file to the 0.0 mark on the display and then withdrawing it 0.5 mm appears to be the most accurate way to use this device. In an attempt to achieve better results Vera & Gutierrez (2004) also recommended the access cavity should be dried before introducing the file into the canal.