This study was to determine the relative radiopacities of cavity lining materials (Compomer and Flowable resin) for posterior composite resin restoration.
Compomers (Dyract, Compoglass, F2000, and Dyract flow, Compoglass F) and Flowable resins (Tetric flow, Aeliteflo, Revolution) were used for this study. Five specimens of 5mm in diameter and 2mm thick were fabricated with each material. Human molars were horizontally sectioned 2mm thick to include both enamel and dentin. The radiopacities of enamel, dentin, cavity lining materials, and aluminum step wedge were obtained from conventional radiograph and NIH image program.
The results were as follows :
1. All the tested lining materials showed the same levels of radiopacity as or greater than that of dentin.
2. All compomer tested (Dyract, Compoglass, F2000, and Dyract flow, Compoglass F) and Tetric flow were more radiopaque than enamel.
3. The radiopacities of Revolution were between enamel and dentin, and all compomer and Tetric-flow were greater than those of Revolution, Aeliteflo or dentin.
Clinican should be able to distinguish these cavity lining materials radiographically from recurrent decay, voids, gaps, or other defects that lead to clinical failure. Utilization of materials ranked more radiopaque than enamel would enable clinicans to distinguish th lining material from tooth structure.
|