Research Information System
Selçuk Üniversitesi Diş Hekimliği Fakültesi, vol.17, no.2, pp.93-97, 2008 (Peer-Reviewed Journal)
Background:
All ceramic restorations benefit from resin cement
bonding to the tooth. However, the literature is unclear on which
cement produces the highest and longest-lasting bond strength.
The aim of this study was to examine shear bond strength of the vita
celay alumina ceramic discs luted to dentin with 3 different resin
cements.
Methods:
Thirty human molars were embedded in acrylic resin and
cut below 2 mm enamel-dentin junction which expose deep dentin.
30 Vita Celay alumina ceramic discs were prepared with Celay CAD/
CAM system. Alumina ceramic discs were cemented to the dentin
surface with 2 different resin cements [Clearfil esthetic cement (CES),
Rely X U100 (RX)] and a resin modified glass ionomer cement [G
Cem (GC)] according to the manufacturer’s directions. Shear test
was performed with an universal testing machine at a crosshead
speed of 1 mm/min until bonding failure. Data were analyzed with
one way ANOVA. Means were compared with Tukey’s test at the
0.05 level of significance.
Results:
The 1-way ANOVA revealed statistically differences in shear
bond strength among the 3 cementation groups. Mean shear bond
strengths were 12.45 MPa, 7.58 MPa, 6.11 MPa for CES, GC, RX
respectively. It was found statistically significant difference between
all test groups. The highest shear bond strength value was observed
in the specimens which were cemented with CES. GC group
demonstrated higher shear bond strength than RX group.
Conclusion:
Within the limitations of this study, the 3 luting agents
were significantly different. Self adhesive cement (RX) has the lowest
shear bond strength to dentin and the highest shear bond strength
was observed at resin composite cement (CES).
KEY WORDS
Shear bond strength, resin cement, alumina ceramics