Publicação da EEC no Endodontic Practice Today - Comparative study of the radiopacity of endodontic sealers with different chemical compositions

Comparative study of the radiopacity of endodontic sealers with different chemical compositions
Eduardo Gregatto Zeferino, Rodrigo Sanches Cunha, Thaís Sturion Bellato, José Edir Guedes Filho, Alexandre Sigrist De Martin, Carlos Eduardo da Silveira Bueno

Aim: The objective of the present study was to compare the radiopacity of endodontic sealers based on three different chemical compositions: epoxy resin and calcium hydroxide (Acroseal and Sealer 26), zinc oxide eugenol (Endofill, Endométhasone N, N-Rickert), and methacrylate resin (RealSeal). Materials and methods: Three specimens measuring 10 mm in diameter and 2 mm in thickness were prepared from each test material and radiographed next to a 1- to 8-mm-thick aluminium stepwedge using occlusal films. The radiographs were digitised, and optical density was used to determine the radiopacity of the materials according to a greyscale with levels ranging from 0 to 255. The data was submitted to the variance test (ANOVA, P < 0.05) as well as to the Ryan-Einot-Gabriel-Welch and Quiot test (REGWQ) for multiple comparisons of the means.
Results: The greyscale level means for the materials, in increasing order, were: Acroseal – 125.3; Sealer 26 – 144.3; Endométhasone N – 155; Endofill – 175.3; RealSeal – 183; N-Rickert – 188.3. None of the materials presented a radiopacity mean level significantly lower than that obtained with 4 mm of aluminium (111.3), which was used as a reference to compare the sealers following ANSI/ ADA specification 57 (2 mm thicker than the test specimen).

Conclusions: All of the endodontic sealers evaluated presented a radiopacity level above the min- imum required.


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