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Effect of Ceramics and Cements on the Color Stability of Hybrid Abutments

Effect of Ceramics and Cements on the Color Stability of Hybrid Abutments Stefani Eken1,Mehmet Akça1,Gülsüm SAYIN ÖZEL1,Işıl Karaokutan2 1- Istanbul Medipol University 2- Pamukkale University Purpose: The purpose of this in vitro study was to evaluate the color stability of resin cements for hybrid abutment crowns after accelerated aging using different ti-base surface treatments and ceramic materials. Material and methods: Total of 80 Titanium disc shape specimens were prepared using milling machine (10mm diameter and 3 mm thickness). And for Ti specimens 4 different surface treatment was applied. 1-Control-non-treated, 2-50m sandblasted with Al203 particules,3-110m sandblasted with Al203 particules, 4- Cojet treated. Ceramic specimens (thickness, 2mm ±0.05 mm; diameter, 4.00 ±0.10 mm) were prepared using lithium disilicate (low translucency [LT] n=80) ceramics and Zirconia reinforced lithium disilicate(ZLS) n=80. Self-Curing cement -SC(Multilink Hybrid Abutment Cement, Ivoclar Vivadent) and Dual curing cement -DC( Panavia V5 Cement, Kuraray) were used for cementation Color difference (ΔE00) values were obtained by spectrophotometric quantification of L* (lightness), a* (green-red), and b* (blue-yellow) values before and after 5000 cycle thermal aging. The Kruskal-Wallis, Mann-Whitney U, Wilcoxon signed rank, and Bonferroni post hoc tests were used for statistical analysis. Results: After specimens were subjected to accelerated aging, ZLS ceramic specimens luted with Multilink SC cement on the 50m sandblasted surfaces exhibited the greatest color change (ΔE00=3.17), whereas ZLS ceramic specimens luted with Panavia V5 DC cement on the nontreated ti surfaces exhibited the least color change (ΔE00=0.52). ΔE00 values for all specimens showed statistically significant difference (P<.001). Lithium disilicat ceramics had significantly higher ΔE00 values than ZLS ceramics(P<.001). Conclusion: Ceramic and resin-cement systems affected the color stability of hybrid abutment crowns. Relative to other ceramics, lithium disilicate ceramics exhibited greater color changes upon aging.Opaque color DC resin cement is recommended for lithium disilicate ceramics.

STEFANİ EKEN
ISTANBUL MEDIPOL UNIVERSITY
Turkey

MEHMET AKÇA
ISTANBUL MEDIPOL UNIVERSITY
Turkey

GÜLSÜM SAYIN ÖZEL
ISTANBUL MEDIPOL UNIVERSITY
Turkey

IŞIL KARAOKUTAN
PAMUKKALE UNIVERSITY
Turkey

 


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