Permeability of marginal hybrid layers in composite restorations

Carlo Prati, Stefano Chersoni, Giovanni Luca Acquaviva, Lorenzo Breschi, Pietro Suppa, Franklin Chi Meng Tay, David Henry Pashley

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The goal of adhesive dentistry is to restore the peripheral seal of dentin lost from removal of enamel. Unfortunately, the hybrid layer (HL) that is used to create that seal is permeable to small ions or molecules, even in the absence of detectable, interfacial gap formation via nanoleakage. This nanoleakage results from several mechanisms including incomplete infiltration of adhesive monomers into demineralized collagen matrix, presence of hydrophilic monomers, and insufficient removal of solvent or water that remains trapped inside the HL. These mechanisms lead to a porous interface with nanometer-sized channels that increase the permeability of the HL. The null hypothesis tested in this study was that water and acidic solution storage are able to alter in vitro the resin-dentin interface, further increasing the marginal hybrid layer (MHL) permeability. Class II cavities were made in vitro. The specimens were stored in water for 1 week and in lactic acid solution for 3 days. Polyvinyl siloxane impressions of restoration margins were taken before and after storage in water and lactic acid solution. Polyether replicas were obtained using the silicon impressions as molds. Replicas and original samples were observed under scanning electron microscopy. Lines of water droplets were detected on MHLs and overlying adhesive only after storage. Replicas obtained after acidic solution storage showed great numbers of irregularities such as gaps, voids, and degradation of the dentin-restoration surface margin, but also a great number of droplets. Dentin-restoration resin interfaces absorb water and are damaged by storage in dilute lactic acid. The presence of water droplets probably indicates water that flows out of the interface during the setting time of the impression and thus represents an index of marginal HL water permeability.

Original languageEnglish (US)
Pages (from-to)1-7
Number of pages7
JournalClinical oral investigations
Volume9
Issue number1
DOIs
StatePublished - Mar 1 2005

Fingerprint

Permeability
Water
Dentin
Adhesives
Lactic Acid
Silicon
Dental Enamel
Dentistry
Electron Scanning Microscopy
Fungi
Collagen
Ions

Keywords

  • Bonding agents
  • Dentin permeability
  • Hybrid layer
  • Replica
  • Restoration

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Prati, C., Chersoni, S., Acquaviva, G. L., Breschi, L., Suppa, P., Tay, F. C. M., & Pashley, D. H. (2005). Permeability of marginal hybrid layers in composite restorations. Clinical oral investigations, 9(1), 1-7. https://doi.org/10.1007/s00784-004-0273-4

Permeability of marginal hybrid layers in composite restorations. / Prati, Carlo; Chersoni, Stefano; Acquaviva, Giovanni Luca; Breschi, Lorenzo; Suppa, Pietro; Tay, Franklin Chi Meng; Pashley, David Henry.

In: Clinical oral investigations, Vol. 9, No. 1, 01.03.2005, p. 1-7.

Research output: Contribution to journalArticle

Prati, C, Chersoni, S, Acquaviva, GL, Breschi, L, Suppa, P, Tay, FCM & Pashley, DH 2005, 'Permeability of marginal hybrid layers in composite restorations', Clinical oral investigations, vol. 9, no. 1, pp. 1-7. https://doi.org/10.1007/s00784-004-0273-4
Prati, Carlo ; Chersoni, Stefano ; Acquaviva, Giovanni Luca ; Breschi, Lorenzo ; Suppa, Pietro ; Tay, Franklin Chi Meng ; Pashley, David Henry. / Permeability of marginal hybrid layers in composite restorations. In: Clinical oral investigations. 2005 ; Vol. 9, No. 1. pp. 1-7.
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