Der Haftverbund des Wurzelkanalsealers Well-Root ST zum Wurzelkanaldentin in Abhängigkeit verschiedener endodontischer Spüllösungen
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Philipps-Universität Marburg
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Abstract
A sufficient, stable root canal filling is crucial for successful endodontic treatment and a good prognosis for the root canal-treated tooth. While gutta-percha has proven to be the gold standard as the core material for root canal fillings for decades, new materials and material classes are constantly being developed in the field of sealers. Studies have already shown for various sealers that the use of different rinsing solutions also leads to varying adhesion values. In many cases, leaving the smear layer in place also resulted in higher adhesion values than after removing it.
The aim of this in vitro study was to determine the effects of different rinsing liquids on the adhesive bond between root canal dentin and the bioceramic sealer Well-Root ST as well as the influence of the smear layer.
Material and methods:
To conduct this study, 60 human, caries-free extracted teeth that had not previously undergone endodontic treatment were used. The teeth were decapitated to a length of 9 mm and prepared to ISO 55, AL 8 mm using the F360/Endopilot automated preparation system. The teeth were then manually prepared to ISO 60, 8 mm AL using a K-Reamer and to 7.5 mm AL using BioRaCe ISO 60.
The teeth were randomly assigned to 6 groups and rinsed with the rinsing solutions 1: distilled water, 2: ethylenediaminetetraacetate 17%, 3: citric acid 40%, 4: ethanol 95%, 5: sodium hypochlorite 5.25% and 6: chlorhexidine digluconate 2%, each with 3 ml for 1 min.
After rinsing and drying the canals, the steel spreader was inserted with the root canal sealer to be examined.
After 4 weeks of moist storage at 37 °C, the samples were subjected to a pull-out test using a universal testing machine. The maximum force up to adhesive failure was determined. The resulting fracture modes were also analyzed.
The statistical analysis was carried out using the Shapiro-Wilk, ANOVA, Levene, Gabriel and Chi-square tests.
Results:
The statistical analysis showed that the endodontic rinsing solutions used had a significant influence on the adhesion values of Well-Root ST.
By far the best adhesion values in this study were achieved when rinsing with ethanol (median 8.61 MPa). The rinsing solutions with distilled water, CHX and NaOCl also achieved solid adhesion values, but had a difference of around 3 MPa to ethanol. The chelators EDTA and especially citric acid achieved by far the worst adhesion values in this study (citric acid median 2.23 MPa). Thus, the use of chelators to dissolve the smear layer led to poorer adhesion values. However, the statistics showed no correlation between the fracture modes and the adhesive bond.
Conclusion:
Under the conditions of this study, the root canal sealer Well-Root ST exhibited high bond strength values. Rinsing with ethanol in particular resulted in very good adhesion values to the root canal dentin (median: 8.61 MPa), which is why a final rinse with alcohol should be considered when filling roots with Well-Root ST. Based on the results of the present study, EDTA should be given preference over citric acid when removing the smear layer.
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Created: 2025Issued: 2026-01-12Updated: 2025-07-01
Faculty
Medizin
Publisher
Philipps-Universität Marburg
Language
ger
Data types
DoctoralThesis
DFG-subjects
HaftverbundWell-Root STWurzelkanalsealerMedizinbioaktivSpüllösungenendodontics bioceramicroot canal treatmentmedicineirrigants
DDC-Numbers
610
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Vaupel, Pia: Der Haftverbund des Wurzelkanalsealers Well-Root ST zum Wurzelkanaldentin in Abhängigkeit verschiedener endodontischer Spüllösungen. : Philipps-Universität Marburg 2026-01-12. DOI: https://doi.org/10.17192/z2025.0025.