Evaluate the Influence of Combined Composite Restorations Radiopacity in Deep Class II Cavities with Three Imaging Systems: Conventional Film, Digital System and Cone Beam Computed Tomography
Author(s): Davari Abdolrahim, Ezoddii Ardekani Fatemeh, Daneshkazemi Alireza, Moeini Maliheh, Sadoughi Monireh*
Statement of the Problem: The radiopacity of esthetic restorative materials is important requirement in radiographic diagnosis especially in secondary caries.
Purpose: The aim of this study was to evaluate the influence of combined composite restorations radiopacity in deep class II cavities with three radiographic systems.
Materials and Methods: Class II preparations were made in 40 extracted molar teeth. The teeth were divided into four groups: fully current resin composite, flow composite associated with current resin composite, glass ionomer associated with current resin composite, amalgam associated with current resin composite. Groups 2, 3, and 4 were filled as combined restorations (sandwich technique). The images on film, charge-coupled device (CCD) digital systems, and cone beam computed tomography (CBCT) were evaluated by two examiners and the data were achieved. The systems for obtaining images presented were similar for each material. The data were analyzed according to ANOVA and Kendall’s tau-b, Kruskal- Wallis, Exact, and Fisher’s exact tests were applied.
Results: Amalgam had the highest radiopacity among the materials being tested (equivalent to 9 mm Aluminium). The groups 2 and 3 ranked next (equivalent to 8 mm Al). Group 1 had the lowest radiopacity among the materials being tested (equivalent to 7 mm Al). All groups were more radiopaque than enamel (enamel=6 mm Al).
Conclusion: Radiopacity rates were as follows: Amalgam>flow glass ionomer>current composite>enamel>dentin. According to this study amalgam, between the said combined composite restorations, has the maximum radiopacity in deep class II cavities with these three imaging systems.