The effect of application sustained seating pressure on adhesive luting procedure

Chieffi, Nicoletta; Chersoni, Stefano; Papacchini, Federica; Vano, Michele; Goracci, Cecilia; Davidson, Carel L.; Tay, Franklin R.; Ferrari, Marco

doi:10.1016/j.dental.2006.01.006

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Volume 23, Issue 2 , Pages 159-164, February 2007

The effect of application sustained seating pressure on adhesive luting procedure

Nicoletta Chieffi
- Department of Dental Materials, University of Siena, Siena, Italy
- Corresponding author. Tel.: +39 0577 233131; fax: +39 0577 233117.
Stefano Chersoni
- Department of Dental Materials, University of Siena, Siena, Italy
- Department of Dental Sciences, University of Bologna, Bologna, Italy
Federica Papacchini
- Department of Dental Materials, University of Siena, Siena, Italy
Michele Vano
- Department of Dental Materials, University of Siena, Siena, Italy
- Department of Oral Surgery, University of Pisa, Pisa, Italy
Cecilia Goracci
- Department of Dental Materials, University of Siena, Siena, Italy
Carel L. Davidson
- Department of Dental Materials, University of Siena, Siena, Italy
Franklin R. Tay
- Department of Dental Materials, University of Siena, Siena, Italy
- Department of Oral Biology & Maxillofacial Pathology, Medical College of Georgia, Augusta, GA, USA
Marco Ferrari
- Department of Dental Materials, University of Siena, Siena, Italy

Received 25 August 2005; accepted 4 January 2006.

Abstract

Objectives

To evaluate the effect of short versus long application seating pressure on the bond strength of resin blocks, luted with a dual-cured resin cement (Panavia F) to pre-coated or non pre-coated dentin with an hydrophobic light-cured adhesive (Clearfil Protect Bond).

Methods

Sixteen non-carious human third molars were randomly divided into six Groups (four teeth each). Cylindrical composite blocks were luted with Panavia F (Group Ia) and with Clearfil Protect Bond with Panavia F (Group IIa) and seating pressure was applied for 5s. In Groups Ib and IIb, the two bonding procedures were respectively repeated, but the resin cylinder was maintained under constant pressure during the entire 3min polymerization period for the resin cement. After storing in distilled water for 24h, 0.9mm×0.9mm sticks were produced from these luted specimens for microtensile bond testing and SEM examination.

Results

The use of Clearfil Protect Bond with Panavia F produced higher bond strengths than the use of Panavia F (p<0.05). Extending the time of pressure application up to 3min increased the bond strength (p<0.001) and improved the integrity of the interfacial quality.

Significance

The application of sustained seating pressure during luting procedures and the additional use of a hydrophobic light-cured adhesive both improve the final bond strength of the resin cement.

Keywords: Seating pressure, Resin cement, Dentin adhesive system, Bond strength