Apex Locators in Primary Teeth-Review

Maintaining the integrity of the primary dentition until physiologic exfoliation is a major goal when treating young patients. The removal of all pulp tissue, necrotic material and microorganisms from the root canal is essential for endodontic success. This can only be achieved if the length of the tooth and the root canal is determined with accuracy. Radiographic examination is most common method but in children it is usually achieved with difficulty because of the sensor size which cannot be used comfortably in a child's small mouth. Secondly, there is radiation exposure. To overcome these difficulties apex locators are introduced, but there is qualm about its use in primary teeth in various condition. Aim of this review article to map out in brief about need, evolution and accuracy of electronic apex locators in primary teeth.