Determination of Mean Distance of Obturation from Radiographic Apex by Using Electronic
Method of Working Length MeasurementMuhammad Qasim Javed, Alia Ahmed, Adil Shahnawaz, Hira Zaman.
Objective: The aim of the study was to determine the mean distance of obturation from the radiographic apex,
in maxillary and mandibular teeth, using electronic apex locator for working length measurement.
Study Design: Cross sectional study.
Place and Duration of Study: The study was conducted in the Department of Operative Dentistry, at Islamic
International Dental Hospital, Riphah International University from September 1 , 2016 to March 15 , 2017.
Materials and Methods: The mean distance of obturation from radiographic apex was evaluated in 97 canals of
43 patients, between 14 to 55 years of age. Working length was determined by using Dentaport ZX apex locator.
Canals were prepared by using step back technique and obturated by cold lateral condensation technique.
Postoperative radiographs were taken by using paralleling technique and the results were evaluated in SPSS
Results: The mean distance of obturation from radiographic apex was found to be -0.52mm with standard
deviation (SD) of + 0.57.No statistically significant difference was found between the apical limit of canal filling
on the basis of tooth vitality and tooth type. (P-value > 0.05).
Conclusion: This study suggested that appropriate use of apex locator can decrease the required number of
radiographs during endodontic treatment and can be used reliably with no statistically significant difference in
mean distance of obturation from radiographic apex when used in maxillary and mandibular teeth.
Key words: Electronic Apex Locator, Obturation, Working Length Determination.