Effects of X-rays and magnetic resonance imaging on mercury release from dental amalgam into artificial saliva

Kurşun, Şebnem; Öztaş, Bengi; Ataş, Havva Bekiroğlu; Taştekin, Mustafa

doi:10.1007/s11282-013-0154-0

Cited by 35 publications

(33 citation statements)

References 16 publications

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“…We believe that the disagreement between our results and those reported by Müller-Miny may be due to the in vitro nature of their experiment. On the other hand, our observations are in line with those reported by Kursum et al who measured the mercury release from amalgam restorations after X-ray exposures and showed that mercury release increases after exposure to X-ray (11) . Mortazavi et al have recently shown that a few published papers which reported no increased release of mercury after MRI, may have some methodological errors (18) .…”

Section: Discussionsupporting

confidence: 93%

“…Moreover, our recent studies on the effects of stronger magnetic ields entirely con irmed our previous indings (10) . From the other point of view, we have also shown that papers which reported no increased release of mercury after MRI, may have some methodological laws (11) . On the other hand, other investigators and our team have previously evaluated the impact of MRI on microleakage of amalgam restorations (12)(13)(14)(15) .…”

Section: Introductionmentioning

confidence: 72%

“…Before irradiation, teeth samples were poured into a 500-mL plastic tube. As discussed by Kursun et al the thickness of the arti icial saliva over teeth samples was 1.5 cm to mimic soft tissue (11) . We used X-ray ilms (Fuji SHB ilms) for measuring the area of the exposure ield (4.7 × 3.8 cm 2 ).…”

Section: Irradiation Of the Samplesmentioning

confidence: 99%

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Increased Mercury release due to exposure to electromagnetic radiation as a limiting factor for using dental amalgam

Paknahad

Dehghani

Jarideh

et al. 2016

IJRR

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Background:Although it is one of the most toxic nonradioac ve elements, mercury is widely used in dental amalgam. Mercury is a toxic element which can damage various organs such as central nervous system, renal, respiratory and hematologic systems. The adverse health impacts associated to exposure to some common sources of electromagne c fields including laptop computers, mobile phones, MRI and mobile phone jammers have been evaluated by our laboratory in our previous inves ga ons. In this study, we aimed to evaluate the effect of X ray exposure on microleakage of amalgam restora on. Materials and Methods: Standardized class V cavi es were prepared on the buccal surfaces of 46 non-carious freshly extracted human premolars. The teeth were randomly divided into experimental and control groups. Experimental group were exposed to X-ray using an intraoral radiography machine at 60 kVp, 0.1 s, 7 mA with 2.5 mm Al total filtra on. The absorbed dose was 245.0 ± 0.5 µGy. All specimens were placed in 2 % basic fuchsin solu on for 24 hours. Then the specimens were sec oned and microleakage was assessed according to dye penetra on using a stereomicroscope. Sta s cal analysis was performed with the Mann-Whitney U-test. Results: Microleakage was significantly higher in the X-ray exposed teeth compared to those of the non-irradiated samples. Conclusion: The results of the present study suggest that X-ray exposure increased microleakage of amalgam restora ons.

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Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 72%

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Increased Mercury release due to exposure to electromagnetic radiation as a limiting factor for using dental amalgam

Paknahad

Dehghani

Jarideh

et al. 2016

IJRR

View full text Add to dashboard Cite

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“…This observation was in line with our findings. Moreover, in another in-vitro study, treated teeth and the effects of irradiation with MRI and X-ray fields were assessed separately (without exploring the combined effects), and was reported that Xrays could cause a significant difference (p <0.05) in the release of mercury in comparison with MRI [25].…”

Section: Post-radiation Stepsmentioning

confidence: 99%

“…Briefly after, the role of MRI irradiation (1.5T) in the release of mercury in the urine of students with restored teeth was reported [24]. In vitro study on restored teeth in the presence of MRI (1.5T) and X-rays was performed, separately, and it was stated that despite the presence of mercury in saliva in the presence of X-rays, there was no specific MRI effect [25]. However, in the criticism of this report, the absence of MRI effects was attributed to methodological errors [26].…”

Section: Introductionmentioning

confidence: 99%

The Assessment of Mercury Released from Dental Amalgams after Exposure to Wi-Fi and X-Ray Radiation in Artificial Saliva

Hosseini¹,

Mehdizadeh²,

Sanipour³

et al. 2018

Eurasian J Anal Chem

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Mercury is a well-known toxic element that is found in various forms in nature. Recently, dental amalgams have been recognized as a new source of mercury. This study was carried out under in vitro condition; the amount of mercury released from teeth restored with amalgams in the presence of Wi-Fi router radiation (non-ionizing radiation) and X-ray (ionizing radiation) using a protocol similar to Computed Tomography of Para-nasal Sinuses (CT) were analyzed separately, and in combination on the samples. For this reason, 50 human premolars were restored with a certain type of commercial amalgams. The samples were divided into five groups; control, only-CT, CT+Wi-Fi, Wi-Fi+CT and only-Wi-Fi groups, and mercury measurement were investigated at 24 and 48 hours after exposure to radiation by cold-vapor atomic absorption system. The results showed a significant difference between subgroups 24 and 48 h (p-values = 0.001 and 0.008). However, over time a significant difference was only found in CT+Wi-Fi group (p-value = 0.043). In addition, in comparison with the control group, only the subgroup that was exposed to Wi-Fi waves showed a significant difference after 24 hours (p = 0.033). In line with some of the previous studies, our findings showed that electromagnetic waves are involved in mercury release process, and warnings about the consequences of electromagnetic waves on mercury release and subtitling it with a new compound in restorative dentistry should be taken into consideration.

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No Increased Mercury Release from Dental Restorations at 1.5T, 3T, or 7T MRI

Burkett,

Rasmussen,

Fillmore

et al. 2023

Magnetic Resonance in Med

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PurposeDental amalgam contains mercury and is commonly used in dental restorations. The impact of MRI on mercury excretion from dental amalgam is not well understood across clinical field strengths, especially 7T. We investigated the effects of MRI exposure on mercury excretion using fresh, lab‐created dental amalgam restorations and in extracted teeth with old, pre‐existing restorations.MethodsDonated, unfilled human teeth (n = 120) were restored with amalgam before being stored in saline, artificial saliva, or a dry box prior to MRI scanning. The teeth were placed in individual tubes of fresh artificial saliva and scanned at 1.5T, 3T, or 7T or left unscanned as controls. Mercury concentrations were measured 24–30 h later. Donated teeth with pre‐existing restorations (n = 40) were stored in artificial saliva, scanned at 7T or left unscanned as controls, and mercury concentration tested.ResultsFor teeth extracted and restored in a laboratory, no significant difference was found (F = 2.42, P = 0.072) between mean mercury concentrations of unscanned teeth (13.72 μg/L) and teeth scanned at 1.5T (10.88 μg/L), 3T (12.65 μg/L), or 7T (8.88 μg/L). For teeth extracted with previously placed restorations, no significant difference (P = 0.288) was found between unscanned controls (4.28 μg/L) and teeth scanned at 7T (6.63 μg/L).ConclusionMRI of dental amalgam does not significantly increase mercury excretion at 1.5T, 3T, or 7T compared to unscanned teeth. This holds true for controlled laboratory restorations as well as for those placed and lived with prior to extraction and scanning, demonstrating no added risk to the clinical patient or research subject.

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Effects of X-rays and magnetic resonance imaging on mercury release from dental amalgam into artificial saliva

Cited by 35 publications

References 16 publications

Increased Mercury release due to exposure to electromagnetic radiation as a limiting factor for using dental amalgam

Increased Mercury release due to exposure to electromagnetic radiation as a limiting factor for using dental amalgam

The Assessment of Mercury Released from Dental Amalgams after Exposure to Wi-Fi and X-Ray Radiation in Artificial Saliva

No Increased Mercury Release from Dental Restorations at 1.5T, 3T, or 7T MRI

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