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Philipps-Universität Marburg
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Abstract
Aim of the study
Aim of this in-vitro study was to evaluate the chromadaptive resin composite
Omnichroma, which was launched on the market in 2019, and the associated blocker
regarding it´s adhesion to deep dentin. Syntac was used as an adhesive system in the
selective-etch and etch-and-rinse approaches. The long-established packable
composites Venus Diamond and Tetric Prime have been used in reference groups. In the
Tetric Prime groups, the effects of increasing increment thickness from 2 mm to 4 mm,
which is not recommended by the manufacturer, was also investigated.
Materials and methods
4 x 4 x 4 mm Class-I cavities were prepared in 50 caries- and filling-free human
permanent third molars, which were then randomly assigned to 10 test groups. One half
of the groups was bonded with Syntac in selective-etch mode (SE), while the other half
used it as four-step etch-and-rinse adhesive system (TE). Subsequently, one of these
groups was filled with the sculptable composites Omnichroma, Omnichroma in
combination with the corresponding blocker, Venus Diamond in 2 mm increments and
Tetric Prime in 2 and 4 mm increments. The cutting process produced dentin composite
beams with a cross-section area of 1 x 1 mm, which were loaded until failure in the
subsequent microtensile test. Finally, the fracture surface of the dentin parts was
examined under a scanning electron microscope (SEM). SPSS was used for the statistical
analysis. Tests such as the Kolmogorov-Smirnov test, the Mann-Whitney-Wilcoxon test
and the a error inflation were carried out.
Results
The results of the present investigation revealed that the application of Syntac in the
etch-and-rinse technique leads to higher bond strengths between dentin and composite
than in the selective-etch technique. Furthermore, it was confirmed that an increase in
the increment thickness of Tetric Prime from 2 mm to 4 mm, which is not approved by
the manufacturer, leads to a deterioration of bond strength. The chromadaptive
composite Omnichroma and the associated blocker can achieve similar bond strengths
in the etch-and-rinse mode as the comparable groups of Venus Diamond and Tetric
Prime.
Conclusion
The following conclusions can be drawn from the present study: Syntac should be
applied using the four-step etch-and-rinse technique. This improves the bond strength
and the dentist does not have to spend any additional time compared to the selective-
etch technique. The manufacturer's instructions should be strictly followed when using
the products, as increasing the increment thickness to 4 mm instead of the permitted 2
mm had a negative effect on bond strength. Finally, the results show that the chroma-
adaptive resin composite Omnichroma can achieve comparable bond strengths as the
packable resin composites Venus Diamond and Tetric Prime using the etch-and-rinse
technique with the corresponding blocker. Whether Omnichroma can also achieve
clinically comparable results in terms of mechanical properties and colour stability in the
long term must be investigated in further studies.
Review
Metadata
Contributors
Supervisor:
Dates
Created: 2025Issued: 2025-06-04Updated: 2025-06-04
Faculty
Medizin
Publisher
Philipps-Universität Marburg
Language
ger
Data types
DoctoralThesis
Keywords
Venus DiamondOmnichromaChromoadaptive resin compositeadhesion testingSelective enamel etchingSelektive SchmelzätzungClass-IVenus Diamondchromadaptive KompositeOmnichromaKlasse-IEtch-and-rinse; SyntacSyntacTetric PrimeTetric Prime
DDC-Numbers
610
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Kelter, Berit Nora: Haftfestigkeit von chromadaptiven Kompositen in Klasse-I-Kavitäten. : Philipps-Universität Marburg 2025-06-04. DOI: https://doi.org/10.17192/z2025.0269.
License
This item has been published with the following license: In Copyright