This study compared the
in vitro marginal integrity of
open-sandwich restorations based on aged calcium
silicate cement versus resin-modified glass ionomer
cement. Class II cavities were prepared on 30
extracted human third molars. These teeth were
randomly assigned to two groups (n = 10) to compare a new hydraulic calcium silicate cement
designed for restorative dentistry (Biodentine,
Septodont, Saint Maur des Fossés, France) with a
resin-modified glass ionomer cement (Ionolux, Voco,
Cuxhaven, Germany) in open-sandwich restorations
covered with a light-cured composite. Positive
(n = 5) and negative
(n = 5) controls were included. The
teeth simultaneously underwent thermocycling and
mechanocycling using a fatigue cycling machine (1,440
cycles, 5–55°C; 86,400 cycles,
50 N/cm2). The specimens were then
stored in phosphate-buffered saline to simulate aging.
After 1 year, the teeth were submitted to glucose
diffusion, and the resulting data were analyzed with a
nonparametric Mann-Whitney test. The Biodentine group
and the Ionolux group presented glucose concentrations
of 0.074 ± 0.035 g/L and 0.080 ±
0.032 g/L, respectively. No statistically
significant differences were detected between the two
groups. Therefore, the calcium silicate-based material
performs as well as the resin-modified glass ionomer
cement in open-sandwich restorations