Correlation Between Endodontic Broken Instrument

Correlation Between Endodontic Broken Instrument and Nickel Level in Urine

Mohammad Ali Saghiri, Nader Sheibani, Franklin Garcia-Godoy, Armen Asatourian, Peiman Mehriar & Mark Scarbecz Biological Trace Element Research ISSN 0163-4984 Biol Trace Elem Res DOI 10.1007/s12011-013-9755-z

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Author's personal copy Biol Trace Elem Res DOI 10.1007/s12011-013-9755-z

Correlation Between Endodontic Broken Instrument and Nickel Level in Urine Mohammad Ali Saghiri & Nader Sheibani & Franklin Garcia-Godoy & Armen Asatourian & Peiman Mehriar & Mark Scarbecz

Received: 10 May 2013 / Accepted: 3 July 2013 # Springer Science+Business Media New York 2013

Abstract This study aims to evaluate the correlation between the presences of separated endodontic instrument inside the dental canal and the nickel (Ni) level in the urine samples of subjected patients. Same-gendered and near-aged participants were selected and were instructed to collect their urine in sterile nickel-free plastic containers. The procedures were carried out in the office, and samples were stored in low-temperature cooler for 1 day and then they were transferred to the laboratory for electrothermal atomic absorption spectrometry. The level of Ni was measured and the correlation coefficient was calculated. Data were analyzed using t tests, Pearson’s correlation coefficients, and linear regression analysis, at a level of significance Pcontrol a

Two-sided paired t test

b

Instrument time=0 for all control subjects

4.34 (1.99) 0.00 (0.0) 24.54 (6.21)

0.005 n/ab 0.000

Model I

Model II

Model III

Age difference Instrument time P for the regression df

0.398 – 0.347 1,26

– 0.231 0.447 1,26

0.024 0.220 0.441 2,25

r2

0.034

0.022

0.063

Model I bivariate relationship between difference in Ni levels and instrument time, Model II bivariate relationship between difference in Ni levels and age difference, Model III the result of regression between endodontic subjects and controls on both instrument time and age difference *P