dc.contributor.author
Toelle, Sophia
dc.contributor.author
Holtkamp, Agnes
dc.contributor.author
Blunck, Uwe
dc.contributor.author
Paris, Sebastian
dc.contributor.author
Schwendicke, Falk
dc.date.accessioned
2020-10-15T10:09:14Z
dc.date.available
2020-10-15T10:09:14Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/28495
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-28244
dc.description.abstract
After selective carious tissue removal, residual carious lesions remain radiographically detectable. Radiopaque tagging resolves the resulting diagnostic uncertainty but impedes bond strengths of adhesives to tagged dentin. We developed a protocol mitigating these detrimental effects. A 30%/50%/70% SnCl2 solution was dissolved in distilled water or a 30%/50%/90% ethanol solution (E30/60/90) and applied to artificially induced dentin lesions. Tagging effects were radiographically evaluated using transversal wavelength-independent microradiography (n = 6/group). Groups with sufficient tagging effects at the lowest SnCl2 concentrations were used to evaluate how tagging affected the microtensile bond strength of a universal adhesive (Scotchbond Universal) to sound and carious dentin (n = 10/group). Two different protocols for removing tagging material were tested: 15 s phosphoric acid etching and 5 s rotating brush application. Scanning/backscattered electron microscopy (SEM/BSE) and energy-dispersive X-ray spectroscopy (EDS) were used to assess surfaces after tagging and removal. The most promising removal protocol was revalidated microradiographically. Tagging significantly increased the radiopacity, with consistent effects for 30% SnCl2 dissolved in water or E30. Microscopically, tagged surfaces showed a thick carpet of SnCl2, and tagging reduced bond strengths significantly on carious dentin but not on sound dentin (p < 0.01). On carious dentin, removal of tagging material using acid etching and rotating brush was microscopically confirmed. Acid etching also mitigated any bond strength reduction (median: 21.3 MPa; interquartile range: 10.8 MPa) compared with nontagged dentin (median: 17.4 MPa; interquartile range: 20.6 MPa). This was not the case for brushing (median: 13.2 MPa; interquartile range: 13.9 MPa). Acid etching minimally reduced the radiographic tagging effect (p = 0.055). Phosphoric acid etching reduces the detrimental bond-strength effects of tagging without significantly decreasing radiographic tagging effects when using a universal adhesive.
en
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
residual caries
en
dc.subject.ddc
600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit
dc.title
Improving the Bond Strength of Radiographically Tagged Caries Lesions In Vitro
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
3702
dcterms.bibliographicCitation.doi
10.3390/ma13173702
dcterms.bibliographicCitation.journaltitle
Materials
dcterms.bibliographicCitation.number
17
dcterms.bibliographicCitation.originalpublishername
MDPI AG
dcterms.bibliographicCitation.volume
13
refubium.affiliation
Charité - Universitätsmedizin Berlin
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.bibliographicCitation.pmid
32825695
dcterms.isPartOf.eissn
1996-1944