Effect of Hygroscopic Expansion on the Push-Out Resistance of Glass Ionomer-Based Cements Used for the Luting of Glass Fiber Posts

Álvaro H. Cury, Cecilia Goracci, Maria Fidela de Lima Navarro, Ricardo M. Carvalho, Fernanda T. Sadek, Franklin Chi Meng Tay, Marco Ferrari

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

This study examined the contribution of hygroscopic expansion of glass-ionomer (GIC) and resin modified glass-ionomer (RMGIC) luting cements to the push-out resistance of fiber posts. Glass fiber posts were luted to post spaces using different cements. Experimental specimens were stored in water, while control specimens were desiccated and stored in mineral oil to eliminate water from intraradicular dentinal tubules and/or the external environment that could have contributed to hygroscopic expansion of the cements. Thin slice push-out tests revealed no difference in retention strengths of resin composite cements that were stored in water or oil. Conversely, GIC and RMGIC cements exhibited increased retention strengths after water sorption. As unfavorable cavity geometry is taxing to dentin bond integrity in root canals, a strategy that relies on increasing the frictional resistance to post dislodgement via delayed hygroscopic expansion of glass-ionomer based materials may be a more pragmatic approach to fiber post retention.

Original languageEnglish (US)
Pages (from-to)537-540
Number of pages4
JournalJournal of Endodontics
Volume32
Issue number6
DOIs
StatePublished - Jun 1 2006

Fingerprint

Glass Ionomer Cements
Water
Resin Cements
Mineral Oil
Dental Pulp Cavity
Dentin
Oils
fiberglass
glass ionomer

Keywords

  • Dislocation resistance
  • fiber post
  • glass-ionomer cement
  • hygroscopic expansion
  • resin modified glass-ionomer cement

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Effect of Hygroscopic Expansion on the Push-Out Resistance of Glass Ionomer-Based Cements Used for the Luting of Glass Fiber Posts. / Cury, Álvaro H.; Goracci, Cecilia; de Lima Navarro, Maria Fidela; Carvalho, Ricardo M.; Sadek, Fernanda T.; Tay, Franklin Chi Meng; Ferrari, Marco.

In: Journal of Endodontics, Vol. 32, No. 6, 01.06.2006, p. 537-540.

Research output: Contribution to journalArticle

Cury, Álvaro H. ; Goracci, Cecilia ; de Lima Navarro, Maria Fidela ; Carvalho, Ricardo M. ; Sadek, Fernanda T. ; Tay, Franklin Chi Meng ; Ferrari, Marco. / Effect of Hygroscopic Expansion on the Push-Out Resistance of Glass Ionomer-Based Cements Used for the Luting of Glass Fiber Posts. In: Journal of Endodontics. 2006 ; Vol. 32, No. 6. pp. 537-540.
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