Objectives
This in vitro study aimed to investigate leakage of mercury from amalgam restorations
after cone beam computed tomography (CBCT) and magnetic resonance imaging (MRI) examinations.
Study Design
In total, 238 amalgam disks were prepared and placed in saline solution. The samples
were allocated randomly to 7 groups, with 34 samples in each group. CBCT imaging was
performed for 4 groups with different imaging parameters (narrow/wide field of view
[FOV]; standard/high-resolution). MRI procedures were performed with 3.0-T and 1.5-T
magnetic field strengths. No imaging was performed for the samples in the control
group. The amalgam samples were removed from the tubes 24 hours after imaging and
submitted for plasma mass spectrometry analysis. Kruskal-Wallis and Dunn's tests were
performed to compare data. A P value less than .05 was accepted as statistically significant.
Results
The highest mean mercury value was found in the 3.0-T MRI group, whereas the lowest
mean value was found in the narrow FOV, standard-resolution CBCT group. There were
no significant differences between the control group and the experimental groups (P ≥ .338) or between the experimental groups (P > .05).
Conclusions
CBCT and MRI procedures similar to those used in patient care caused no significantly
different mercury release compared with nonexposed samples.
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Article info
Publication history
Published online: August 07, 2020
Accepted:
July 14,
2020
Received in revised form:
July 4,
2020
Received:
April 16,
2020
Identification
Copyright
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