The accuracy of extraoral periapical radiography on determining the working length in endodontic treatment: narrative review

Objectives: This review article is aimed to determine the accuracy of extraoral periapical radiography as a determinant working length in endodontic treatment and advantages disadvantages this technique.
 Review: Endodontic dental for damages reaching pulp which aims maintain tooth. One way succeed an accurate length. The can be determined by intraoral examination but some people are sensitive film placement. placement on extraorally needed.
 Conclusion: study showed that had more than 75% determining depending angulation used. concludes used patients who not tolerate with significantly different from meant replaced radiography.