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Type: Artigo de periódico
Title: In vivo preservation of the hybrid layer by chlorhexidine
Author: Carrilho, MRO
Geraldeli, S
Tay, F
de Goes, MF
Carvalho, RM
Tjaderhane, L
Reis, AF
Hebling, J
Mazzoni, A
Breschi, L
Pashley, D
Abstract: Host-derived proteases have been reported to degrade the collagen matrix of incompletely-resinin-filtrated dentin. This study tested the hypothesis that interfacial degradation of resin-dentin bonds may be prevented or delayed by the application of chlorhexidine (CHX), a matrix metalloproteinase inhibitor, to dentin after phosphoric acid-etching. Contralateral pairs of resin-bonded Class I restorations in non-carious third molars were kept under intra-oral function for 14 months. Preservation of resin-dentin bonds was assessed by microtensile bond strength tests and TEM examination. In vivo bond strength remained stable in the CHX-treated specimens, while bond strength decreased significantly in control teeth. Resin-infiltrated dentin in CHX-treated specimens exhibited normal structural integrity of the collagen network. Conversely, progressive disintegration of the fibrillar network was identified in control specimens. Auto-degradation of collagen matrices can occur in resin-infiltrated dentin, but may be prevented by the application of a synthetic protease inhibitor, such as chlorhexidine.
Subject: etch-and-rinse adhesive
in vivo
hybrid layer
Country: EUA
Editor: Int Amer Assoc Dental Researchi A D R/a A D R
Citation: Journal Of Dental Research. Int Amer Assoc Dental Researchi A D R/a A D R, v. 86, n. 6, n. 529, n. 533, 2007.
Rights: fechado
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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