INFLUENCE OF DIFFERENT SURFACE TREATMENTS OF CAD/CAM HYBRID NANOCERAMICS CROWNS ON BOND STRENGTH OF RESIN COMPOSITE CEMENT

Authors

  • Valentina Veselinović University of Banja Luka, Faculty of Medicine, Department of Dentistry, Bulevar vojvode Petra Bojovića 1А, Banja Luka, Bosnia and Herzegovina
  • Rebeka Rudolf University of Maribor, Faculty of Mechanical Engineering, Smetanova ulica 17, Maribor, Slovenia
  • Nataša Trtić University of Banja Luka, Faculty of Medicine, Department of Dentistry, Bulevar vojvode Petra Bojovića 1А, Banja Luka, Bosnia and Herzegovina
  • Verica Pavlić Institute of Dentistry Banja Luka, Zdrave Korde 4, Banja Luka, Bosnia and Herzegovina
  • Radmila Arbutina University of Banja Luka, Faculty of Medicine, Department of Dentistry, Bulevar vojvode Petra Bojovića 1А, Banja Luka, Bosnia and Herzegovina
  • Saša Marin University of Banja Luka, Faculty of Medicine, Department of Dentistry, Bulevar vojvode Petra Bojovića 1А, Banja Luka, Bosnia and Herzegovina
  • Zoran Tatić Military Medical Academy, Dental Clinic, Crnotravska 17, Beograd, Serbia

DOI:

https://doi.org/10.7251/COMEN1801075V

Abstract

Introduction: Urgent demand for high-esthetic material, which at the same
time has the possibility of absorption of mastication stress, has led to the technological
development of hybrid nanoceramics used in CAD / CAM technology.
Aim: The aim of the study was to evaluate the effects of different surface modification
of hybrid nanoceramic crowns on the quality of the cement retention and the influence
of the mastication stress after one year of function.
Material and methods: 50 hybrid nanoceramic CAD/CAM crowns (CERASMART,
GC) are cemented on titanium implant abutments with self-adhesive resin cement (G-CEM,
LinkAce). The samples were divided into five main groups according to surface treatment
(n=10): I (sandblasted with 50 microns Al2O3), II (treated with CERAMIC PRIMER II,
GC), III (treated with 5% hydrofluoric acid), IV (treated with combination of 5%
hydrofluoric acid and CERAMIC PRIMER II), V (control, non-treated group). The samples
were storaged during 24 hours at 37°C, thermocycled and loaded under 10 000 mechanical
cycles loads (simulation of 12 months of function). Retention forces measured in Universal
testing machine. The data were represented as mean ± standard deviation, and for statistical
analysis ANOVA test was used.
Results: The highest initial retention force was demonstrated in the group IV
(6.99±1.18), followed by group I (6.22±1.29), group III (5,97±1,25), group II (5,86±1,17)
and control group samples (4.92±1.19). A statistically significant decline in retention force
was recorded in all tested groups, with the lowest decrease observed in samples treated with
a combination of 5% hydrofluoric acid and CERAMIC PRIMER II (6.08 ± 1.03).
Conclusion: Mechanical and chemical surface modification can strongly influence
the retentions between resin cement and hybrid nanoceramics. The results from this study
are suggesting that the most efficient clinical outcome is the combination of 5% hidrofluoric
acid and CERAMIC PRIMER II.

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Published

2021-10-26

Issue

Vol. 9 No. 1 (2018): Contemporary Materials IX-1

Section

Articles