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Year : 2015  |  Volume : 3  |  Issue : 1  |  Page : 24-28

Accuracy of Root ZX apex locator in primary teeth with different root canal irrigants: An in vivo study

Department of Pedodontics and Preventive Dentistry, College of Dental Sciences, Davangere, Karnataka, India

Correspondence Address:
Dr. I E Neena
Department of Pedodontics and Preventive Dentistry, College of Dental Sciences, Pavilion Road, Davangere - 577 004, Karnataka
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/2348-0149.158161

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Objective: The aim of this in vivo study was to determine the accuracy of 3 rd generation apex locator (Root ZX) in determining the canal length in primary teeth with normal saline and 0.12% chlorhexidine as root canal irrigants. Study Design: A total of 36 primary anterior teeth with minimum of 2/3 rd root lengths (indicated for extraction) were selected for this study. Working length (WL) was measured in dry, saline and chlorhexidine mode respectively and the standardized WL was measured using stereomicroscope under ×30. The data were evaluated using one-way ANOVA and Tukey's post-hoc test using SPSS software version 19 (IBM Company). The critical value for statistical significance was 5%. Results : For teeth without root resorption, the accuracy of Root ZX was 83% in dry mode and 92% in saline and chlorhexidine mode. For root canals with resorption the accuracy of Root ZX was 67% in dry mode and 83% in saline and chlorhexidine mode within ± 1 mm. However these figures decreased to 17%, 58% and 75% without resorption and 0%, 17% and 50% with resorption respectively for within ± 0.5. No significant differences were detected between the three different modes with the tolerance ± 1 mm under without resorption. However, significant difference was found without resorption as well as with resorption under tolerance ± 0.5 mm. Conclusion: The study concluded that Root ZX electronic Root apex locator is accurate with tolerance ± 1 mm in determining the root canal length in primary teeth without root resorption under different root canal irrigants that is, saline and chlorhexidine.

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