A novel dry-bonding approach to reduce collagen degradation and optimize resin-dentin interfaces

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http://hdl.handle.net/10138/277462

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Stape , T H S , Seseogullari-Dirihan , R , Tjäderhane , L , Abunas , G , Marcondes Martins , L R & Tezvergil-Mutluay , A 2018 , ' A novel dry-bonding approach to reduce collagen degradation and optimize resin-dentin interfaces ' , Scientific Reports , vol. 8 , 16890 . https://doi.org/10.1038/s41598-018-34726-8

Title: A novel dry-bonding approach to reduce collagen degradation and optimize resin-dentin interfaces
Author: Stape, Thiago Henrique Scarabello; Seseogullari-Dirihan, Roda; Tjäderhane, Leo; Abunas, Gabriel; Marcondes Martins, Luis Roberto; Tezvergil-Mutluay, Arzu
Contributor: University of Helsinki, Department of Oral and Maxillofacial Diseases
Date: 2018-11-15
Language: eng
Number of pages: 8
Belongs to series: Scientific Reports
ISSN: 2045-2322
URI: http://hdl.handle.net/10138/277462
Abstract: In dentistry, the wet-bonding approach relies on water to maintain demineralized collagen expanded for proper resin infiltration; nevertheless, hydrolytic instability of the resin-dentin interface is inevitable with current bonding techniques. Considering dimethyl sulfoxide's (DMSO) ability to "biomodify" collagen and precipitate enzymes, the aim was to test whether the use of DMSO would permit adequate resin bonding to H3PO4-etched dehydrated dentin and assess its impact on collagen degradation by host-derived enzymes. Etched dentin surfaces from extracted sound human molars were randomly bonded in wet or dry conditions using aqueous or ethanolic DMSO solutions as pretreatments and bonding resins with or without DMSO. Bonded teeth were sectioned into resin-dentin slabs for confocal in situ zymography and beams for microtensile bond strength test. Demineralized powdered dentin was incubated in the tested DMSO -media and a hydroxyproline assay evaluated dissolution of collagen peptides. Zymography was performed on protein extracts obtained from dry and wet H3PO4-ecthed dentin powder treated with the DMSO- media. The correlative biochemical analysis demonstrated that reduction of water content during dentin hybridization by the innovative dry-bonding approaches with DMSO is effective to inactivate host-derived MMP-2 and MMP-9 and thus reduce collagen degradation while simultaneously optimizing resin-dentin bonding.
Subject: DIMETHYL-SULFOXIDE
HYBRID LAYER
ENZYMATIC BIODEGRADATION
RINSE ADHESIVES
WATER
DURABILITY
MATRIX
STRENGTH
SOLVENT
DMSO
313 Dentistry
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