Uluslarası Diş Hekimliği ve Sağlık Kongresi, İzmir, Turkey, 28 - 29 November 2020, pp.427-428
Introduction and Purpose: Hybrid ceramics have superior properties such as physical prope
rties similar to natural teeth, high polishability and easy repair. The aim of this study is to exa
mine the changes in surface roughness and biocompatibility of different hybrid ceramics due t
o thermal aging.
Material and Methods: In this study, hybrid ceramic materials (Lava ultimate-LU; Cerasmart-
CS; Enamic-EN) were compared with the control group (MarkII-M2). Polishing process was
applied to all samples by using polishing kit and diamond polishing paste by same operator.
Surface roughness and cytotoxicity were measured before and after thermal aging. Thermal
aging was applied in the range of 5-55 °C as 10000 cycles. Cytotoxicity was evaluated by MTT
viability test. Paired-samples t test, one-way ANOVA and Tukey 's multiple comparison tests
were used for statistical analysis. P<0.05 were considered statistically significant.
Results: Initial and final roughness values of the LU group were found significantly lower than
M2 control group (p = 0.001). The roughness of the EN group was similar to M2 (p = 0.533)
but was significantly higher than other hybrid ceramics (p <0.001). EN was significantly higher
than M2 in initial cell viability values (p = 0.002), but other hybrid ceramics were found similar.
There was no significant difference between the groups in cell viability after aging (p = 0.180).
Cell viability values increased significantly in the CS group (p = 0.028) with the effect of aging,
whereas it decreased significantly in the EN group (p = 0.049).
Conclusion: Thermal aging slightly increased surface roughness of hybrid ceramics. However,
it doesn't cause an increase in roughness that would impair clinical usability. Thermal aging
affects the biocompatibility of hybrid ceramics. Although the EN hybrid ceramic material was
initially more biocompatible than CS, LU and M2 ceramics, similar biocompatibility was
observed in all ceramic materials after aging.