Effects of coloring procedures on shear bond strength between resin cement and colored zirconia

Year 2018, Volume: 52 Issue: 3, 122 - 126, 01.09.2018

İlkin Tuncel , İşıl Turp

Abstract

DOI: 10.26650/eor.2018.440

Purpose

Debonding is expected as a frequent failure
type in zirconia restorations. Therefore the aim of the current study is to
evaluate the shear bond strength between colored zirconia and resin cement.

Materials and methods

There were 11 groups evaluated each
containing 12 zirconia discs (15 mm x 12 mm x 1.6 mm). Groups were colored with
the colors A3, B1, C4, D2, and D4 of the VITA classical shade scale. Coloring
procedure was carried out for either 3 second or 60 seconds for the study
groups and the control group was left untreated. Specimens were then bonded to
translucent resin cement having a thickness of 3 mm and width of 3 mm. The
shear bond strength of the samples was measured in a universal testing machine
with a crosshead speed of 1 mm per minute. Two-way analysis of variance and
Tukey’s HSD test were used for pairwise comparisons. Also paired t-test was
used for comparing groups with the same color but having different shading
times.

Results

Any significant difference was not found
between the shear bond strengths of samples depending on whether color or
shading times. Among the groups, B1 (60 seconds of coloring) had the highest
bond strength (10.05 MPa), while A3 (60 seconds of coloring) showed the lowest
bond strength (6.72 MPa). However, these differences were not statistically
significant.

Conclusion

Coloring zirconia did not affect the shear
bond strength between zirconia and resin cement.

Keywords

Shear bond strength; ceramic; coloring; zirconia; resin cement

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