Einfluss der "Etch-and-rinse" Technik auf die Dentinhaftung an sklerotischem Dentin
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Philipps-Universität Marburg
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Abstract
Aim of the Study
Aim of the study was to evaluate the influence of the etch-and-rinse technique on bonding to sclerotic dentin.
Material and method
Fifty six extracted human teeth (incisors, premolars and molars) providing non-carious cervical lesions were cleaned and divided into 7 groups (n=8). All teeth were conditioned with two adhesives (AdhSE and Syntac) in different ways. The dentin was not prepared. Group 1-3 were treated with Syntac. Group 1 in a selective-etch technique with 30s enamel etching. Groups 2 and 3 were treated with etch-and-rinse technique. Group 2 received a 15s dentin and a 30s enamel etching, in group 3 enamel and dentin were etched for 30s. Groups 4-7 were treated with „AdheSE“. Group 4 was conditioned after manufacturer’s instructions, groups 5-7 were etched analogical to groups 1-3.
Epoxy-resin replicas were made before and after thermomechanical loading (TML) in order to compare marginal quality under SEM magnification.
Results and observations
It could be shown that the etch-and-rinse technique with 30s dentin etching or the use of self-etching primers combined with 15 s dentin-etching produced best marginal integrity in dentin after TML (48.1% and 45.1%). Bond strength of the other groups in decreasing order were: self-etch with 30s etching (37.9%), self-etch without any further treatment (31.2% and 27.8%), etch-and-rinse with 15s etching time (18.0%) and finally selective-etch without any conditioning of dentin (10.8%). There was no gap formation seen before TML (100%).
Conclusions
Prolonged etching time is needed for bonding to sclerotic dentin in order to obtain adequate bond strength. 30 s etching is recommended when using the etch-and-rinse technique. When using self-etch adhesives, 15 s phosporic acid etching is needed before primer application, because the ability of dentin demineralization of self-etch adhesives is not enough to create adequate bond strengths.
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Supervisor:
Dates
Created: 2013Issued: 2013-07-04Updated: 2013-07-04
Faculty
Medizin
Publisher
Philipps-Universität Marburg
Language
ger
Data types
DoctoralThesis
Keywords
etch-and-rinsedentin bondingsclerotic dentinself-etch
DFG-subjects
Dentin Bondingsklerotisches DentinEtch-and-RinseSelf-Etch
DDC-Numbers
610
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Flöttmann, Heike: Einfluss der "Etch-and-rinse" Technik auf die Dentinhaftung an sklerotischem Dentin. : Philipps-Universität Marburg 2013-07-04. DOI: https://doi.org/10.17192/z2013.0433.
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This item has been published with the following license: In Copyright