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Background: Exact estimation of root canal length is imperative for the achievement of root canal treatment. Working length (WL) has been defined as „„the distance from a coronal reference point to the point at which canal preparation and obturation should terminate‟‟. Aim: The aim of this study was to evaluate and compare the accuracy of two generations of apex locators in teeth with simulated apical root resorption using stainless steel and nickel titanium hand files. Materials and methods: Eighty single-rooted, maxillary anterior teeth were selected. The extracted teeth were soaked in 5% sodium hypochlorite for 6 hours and then in sterile 0.9% saline until use. An oblique cut of 45 degree was made from facial to palatal wall. Access cavities were prepared and the Haneen Al Otheem, Swati Srivastava, Shahad Alogayyel, Maymonah Abdurhman Alghadouni. Comparative analysis of two electronic apex locators in working length determination using stainless steel and nickel titanium hand files in permanent teeth with simulated apical root resorption - An in vitro study. IAIM, 2018; 5(5): 45-50. Page 46 Visual Working Length (VWL) was measured. The samples were then embedded in alginate and the electronic measurements were recorded using stainless steel and nickel titanium hand files. Statistical analysis was done by Analysis of variance (ANOVA) followed by Tukey HSD test were used for statistical analysis. Results: There was no statistically significant difference seen with DentaPort ZX and i-Root along with the use of stainless steel and NiTi hand files. Conclusion: In the present study, DentaPort ZX and i-Root apex locators showed similar efficacy in determining working length with the use of both stainless steel and NiTi hand files under present study conditions
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OBJECTIVES: The purpose of this in vitro study was to evaluate the accuracy of working length (WL) determination of four electronic apex locators (EALs), namely, Root ZX (RZX), Elements diagnostic unit and apex locator (ELE), SybronEndo Mini Apex locator (MINI) and Propex pixi (PIXI) using Stainless steel (SS) and nickel-titanium (NiTi) hand files. The null hypothesis was that there was no difference between canal length determination by SS and NiTi files of 4 EALs. MATERIALS AND METHODS: Sixty extracted, single rooted human teeth were decoronated and the canal orifice flared. The actual length (AL) was assessed visually, and the teeth were embedded in an alginate model. The electronic length (EL) measurements were recorded with all four EALs using SS and NiTi files at '0.5' reading on display. The differences between the AL and EL were compared. RESULTS: The results obtained with each EAL with SS and NiTi files were compared with AL. A paired sample t test showed that there was a statistical significant difference between EAL readings with SS and NiTi files for RZX and MINI (p < 0.05). The accuracy of RZX, ELE, MINI and PIXI within +/- 0.5 mm of AL with SS/NiTi files were 93.3%/70%, 90%/91.7%, 95%/68.3%, and 83.3%/83.3%, respectively. CONCLUSIONS: The results of this study indicate that Root ZX was statistically more accurate with NiTi files compared to SS files, while MINI was statistically more accurate with SS files compared to NiTi files. ELE and PIXI were not affected by the alloy type of the file used to determine WL.
Subject(s)
Humans , Alloys , Hand , Reading , Stainless Steel , ToothABSTRACT
OBJECTIVES: The purpose of this in vitro study was to evaluate the accuracy of working length (WL) determination of four electronic apex locators (EALs), namely, Root ZX (RZX), Elements diagnostic unit and apex locator (ELE), SybronEndo Mini Apex locator (MINI) and Propex pixi (PIXI) using Stainless steel (SS) and nickel-titanium (NiTi) hand files. The null hypothesis was that there was no difference between canal length determination by SS and NiTi files of 4 EALs. MATERIALS AND METHODS: Sixty extracted, single rooted human teeth were decoronated and the canal orifice flared. The actual length (AL) was assessed visually, and the teeth were embedded in an alginate model. The electronic length (EL) measurements were recorded with all four EALs using SS and NiTi files at '0.5' reading on display. The differences between the AL and EL were compared. RESULTS: The results obtained with each EAL with SS and NiTi files were compared with AL. A paired sample t test showed that there was a statistical significant difference between EAL readings with SS and NiTi files for RZX and MINI (p < 0.05). The accuracy of RZX, ELE, MINI and PIXI within +/- 0.5 mm of AL with SS/NiTi files were 93.3%/70%, 90%/91.7%, 95%/68.3%, and 83.3%/83.3%, respectively. CONCLUSIONS: The results of this study indicate that Root ZX was statistically more accurate with NiTi files compared to SS files, while MINI was statistically more accurate with SS files compared to NiTi files. ELE and PIXI were not affected by the alloy type of the file used to determine WL.