Effect of the seating pressure on the adhesive bonding of indirect restorations

Nicoletta Chieffi, Stefano Chersoni, Federica Papaccheni, Michele Vano, Cecilia Goracci, Carel L. Davidson, Franklin Chi Meng Tay, Marco Ferrari

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

Purpose: To evaluate the effect of two different techniques of seating pressure application on the adhesive-dentin bond of indirect restorations. Methods: Eight non-carious human third molars were randomly divided in two treatment groups (four teeth each). Cylindrical composite blocks were luted with a resin cement (Panavia F). In Group 1, the seating pressure was applied for 5 seconds. In Group 2, the resin cylinder was maintained under constant pressure during the entire 3-minute polymerization period of the resin cement. After storing in distilled water for 24 hours, 0.9 x 0.9 mm sticks were produced from these luted specimens for microtensile bond testing and SEM examination. Results: The Student t-test showed a significant difference (P< 0.05) in bond strength between Groups 1 and 2. SEM revealed the presence of structural defects and resin globules on the seating surface of the composites. These features were exclusively identified from Group 1 specimens and were probably caused by fluid transudation from the underlying dentin through the simplified self-etch adhesive (ED primer).

Original languageEnglish (US)
Pages (from-to)333-336
Number of pages4
JournalAmerican Journal of Dentistry
Volume19
Issue number6
StatePublished - Dec 1 2006
Externally publishedYes

ASJC Scopus subject areas

  • Dentistry(all)

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    Chieffi, N., Chersoni, S., Papaccheni, F., Vano, M., Goracci, C., Davidson, C. L., Tay, F. C. M., & Ferrari, M. (2006). Effect of the seating pressure on the adhesive bonding of indirect restorations. American Journal of Dentistry, 19(6), 333-336.