In-Vitro Representation of Mercury Release from Amalgam Restorations after Cone-Beam Computed Tomographic Imaging

Abstract

Objective: In this study, we aimed to evaluate the mercury leakage of from dental amalgam fillings after cone beam computed tomography CBCT scan.Material and Methods: This study was approved by the Kırıkkale University Clinical Research Ethics Committee. Written informed consent was obtained from the patients for the use of the extracted teeth in this project. Forty caries-free molar or premolar teeth that had been extracted for clinical indications were used. Two-sided cavities were prepared and amalgam fillings applied to each tooth. One week after amalgam setting process, two groups of 20 randomly selected teeth were placed in 20 mL of artificial saliva. In the experiment group, tubes were immediately exposed with CBCT. The control group was kept under normal conditions. Twenty-four hours later the teeth were removed from the artificial saliva, and the saliva was analyzed for mercury content by using Inductively Coupled Plasma Optical Emission Spectrometry. Results: The amount of mercury released to the artificial saliva was found to be 0.268±0.197 ppm in CBCT group within 24 hours, whereas this value was 0.141±0.152 ppm in the control group.Conclusion: The findings of this study indicated that CBCT imaging of teeth restored with amalgam leads an increase in mercury leakage under experimental conditions

Keywords

• Amalgam, Mercury, Cone beam computed tomography

Konik Işınlı Bilgisayarlı Tomografi ile Görüntüleme Sonrası Amalgam Dolgulardan Cıva Salınımının in-vitro Gösterimi

Öz

Amaç: Çalışmada amalgam dolgulardan konik ışın demetli bilgisayarlı tomografi KIBT ile görüntüleme sonrası oluşacak cıva sızıntısını test etmeyi amaçladık.Gereç ve Yöntemler: Çalışma Kırıkkale Üniversitesi Etik Kurul onayı alınarak yapıldı ve her dişin kullanımı için hastalardan yazılı onam alındı. Çeşitli nedenlerle çekilmiş 40 adet çürüksüz molar ve premolar dişe 2 yüzlü kaviteler açıldı, klinik prosedüre uygun olarak amalgam dolgular yapıldı. Dişler rastgele kontrol ve deney grubu olmak üzere iki gruba ayrıldı. Amalgamın sertleşme süreci tamamlandıktan bir hafta sonra dişler 20ml yapay tükürük Fusayama solüsyonu içeren tüpler içerisine kondu. Kontrol grubu 24 saat bekletilirken; deney grubundaki dişler tüpler içerisinde KIBT ile belirli parametrelerde görüntülendi. Görüntülemeyi takip eden 24 saat sonrasında dişler tüplerden çıkarılıp cıva konsantrasyonu için İndüktif Olarak Eşleştirilmiş Plazma – Optik Eisyon Spektrometresi ICP-OES ile analize gönderildi. Bulgular: KIBT ile ekspoze edilen amalgam dolgulu dişlerden 24 saat içerisinde yapay tükürüğe salınan cıva miktarı ortalama 0,268±0,197 ppm iken, kontrol grubunda bu değer 0,141±0,152 ppm olarak saptandı.Sonuç: Bu bulgular ışığında, deneysel koşullarda, amalgam dolgulu dişlerde KIBT ile gerçekleştirilen görüntüleme cıva salınımını artırmaktadır diyebiliriz

Anahtar Kelimeler

• Amalgam, Cıva, Konik ışın demetli bilgisayarlı tomografi

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