J Adv Prosthodont.  2023 Jun;15(3):114-125. 10.4047/jap.2023.15.3.114.

Effect of abutment types and resin cements on the esthetics of implant-supported restorations

• Çeken A
• Kılınç H
• Turgut S

• KMID: 2544053
• DOI: http://doi.org/10.4047/jap.2023.15.3.114

Abstract

PURPOSE
. The aim of the study was to evaluate the optical properties of new generation (3Y-TZP) monolithic zirconia (MZ) with different abutment types and resin cement shades.
MATERIALS AND METHODS
. A1/LT MZ specimens were prepared (10 × 12 × 1 mm, N = 30) and divided into 3 groups according to cement shades as transparent (Tr), yellow (Y) and opaque (O). Abutment specimens were obtained from 4 different materials including zirconia (Group Z), hybrid (Group H), titanium (Group T) and anodized yellow titanium (Group AT). MZ and abutment specimens were then cemented. L*, a*, and b* parameters were obtained from MZ, MZ + abutment, and MZ + abutment + cement. ∆E₀₀₁ * (between MZ and MZ + abutment), ∆E₀₀₂ * (between MZ and MZ + abutment + cement) and ∆E₀₀₃ * (between MZ + abutment and MZ + abutment + cement) values were calculated. Statistical analyses included 2-way ANOVA, Bonferroni, and Paired Sample t-Tests (P < .05).
RESULTS
. Abutment types and resin cements had significant effect on L*, a*, b*, ∆E₀₀₁ *, ∆E₀₀₂ *, and ∆E₀₀₃ * values (P < .001). Without cementation, whereas zirconia abutment resulted in the least discoloration (∆E₀₀₁ * = 0.68), titanium abutment caused the most discoloration (∆E₀₀₁ * = 4.99). The least ∆E₀₀₂ * = 0.68 value was seen using zirconia abutment after cementation with yellow shaded cement. Opaque shaded cement caused the most color change (∆E₀₀₃ * = 5.24). Cement application increased the L* values in all groups.
CONCLUSION
. The least color change with/without cement was observed in crown configurations created with zirconia abutments. Zirconia and hybrid abutments produced significantly lower ∆E₀₀₂ * and ∆E₀₀₃ * values in combination with yellow shaded cement. The usage of opaque shaded cement in titanium/anodized titanium groups may enable the clinically unacceptable ∆E₀₀ * value to reach the acceptable level. [J Adv Prosthodont 2023;15:114-25]

Keyword

Monolithic zirconia; Color; Anodic oxidation; Hybrid abutment; Resin cement