Objective: This in vitro study assessed the radiopacity changes of Biodentine as a root-end filling
material, using soft and hard tissue simulation by direct digital radiographic techniques.
Materials and methods: Sixty disk specimens of Biodentine (6 mm diameter and 1 mm thickness)
were prepared. The specimens were stored at 37°C for 48 h. Then they were divided into three
groups (n = 20); Group I: specimens radiographed with aluminium step-wedge; Group II: bone segment
was prepared to insert and standardise the specimen placement and then positioned between
the digital sensor and X-ray machine; Group III: utility wax (30 mm thickness) was placed at the
buccal aspect of bone, covering the whole test region. For all groups, three radiographs were taken
for each specimen using intraoral sensor Carestream CS, operating at 60 kV, 7 mA and 0.24 s. The
object-to-focus distance was 30 cm. The mean grey value (MGV) was measured using the densitometry
analysis tool of the Image Tool of CS2100 software. The radiopacity value was determined
according to the radiographic density, which was also converted into millimetres of thickness of aluminium
equivalent (mm Al). Data (mm Al) were submitted to the one-way ANOVA and Tukey’s test.
Results: The specimens evaluated under conditions with simulated hard and soft tissue showed
values above the minimum recommended by the ISO 6867: 2012 specification, while the materials
alone displayed the lowest values (group I).
Conclusion: Biodentine is suitable as a root-end filling material in terms of radiographic features.