REFERENCES

1. Gordon MN, Chandler NP. Electronic apex locators. Int End J 2004;37:425-37.

2. Himel VT, Schott RN. An evaluation of the durability of apex locater insulated probes after autoclaving. J Endod 1993;19:392-4.

3. Inoue. Dental stethoscope measures root canal. Dental Survey 1972;48:38-9.

4. Fouad AF, Krell KV. An in vitro comparison of five root canal length measuring instruments. J Endod 1989;15:573-7.

5. Ebrahim AK, Wadachi R, Suda H. Electronic apex locators - a review. J Med Dent Sci 2007;54:125-36.

6. Frank AL, Torabinajed M. An in vitro evaluation of Endex electronic apex locater. J Endod 1993;19:177-9.

7. Koboyashi C, Suda H. New electronic canal measuring device based on ratio method. J Endod 1994;20:111-4.

8. Welk AR, Baumgartner JC, Marshalll JG. An in vivo comparison of two frequency based electronic apex locaters. J Endod 2003;29:497-500.

9. Nekoofar MH, Ghandi MM, Hayes SJ, Dummer PM. The fundamental operating principles of electronic root canal length measurement devices. Int Endod J 2006;39:595-609.

10. Dimitrov S, Roshkev D. Sixth generation adaptive apex locator. Available from: https://www.researchgate.net/publication/239591380_SIXTH_GENERATION_ADAPTIVE_APEX_LOCATOR. [Last accessed on 14 Mar 2019].