title: Immediate and delayed micro-tensile bond strength of different luting resin cements to different regional dentin.
abstract: We sought to evaluate immediate and delayed micro-tensile bond strength of Panavia F2.0 and Multilink Sprint resin cement to superficial, deep and cervical dentin. Thirty-six freshly extracted non-carious human molars were sectioned in the mesiodistal direction to expose three different dentin regions including superficial dentin (1 mm below the dentine-enamel junction), deep dentin (1 mm above the highest pulp horn) and cervical dentin (0.5 mm above the cemento-enamel junction and 0.5 mm below the dentine-enamel junction). Resin cements were applied on dentin surfaces and composite blocks were luted under constant seating pressure. Each group was divided into three subgroups according to time intervals. Specimens were sectioned to obtain sticks of 1 mm(2) in diameter and subjected to microtensile bond strength testing at a cross head speed of 1 mm/min. Both resin cements showed higher micro-tensile bond strength to superficial dentin than that to deep or cervical dentin (P < 0.001). Micro-tensile bond strengths of Panavia F2.0 were higher than those of Multilink Sprint at different dentin regions (P < 0.001). Immediate micro-tensile bond strengths were higher than those of delayed micro-tensile bond strengths for both resin cements (P < 0.001). It was concluded that resin cements with different chemical formulations and applications yield significantly different micro-tensile bond strengths to different dentin regions.
authors.affiliation: Department of Conservative Dentistry, Faculty of Dentistry, Mansoura University, Mansoura, Dakahleya 35516, Egypt;
authors.forename: Abdelraheem Mohamed
authors.initials: AM
authors.lastname: Ali
authors.forename: Ibrahim Mohamed
authors.initials: IM
authors.lastname: Hamouda
authors.forename: Mohamed Hamed
authors.initials: MH
authors.lastname: Ghazy
authors.forename: Manal Mohamed
authors.initials: MM
authors.lastname: Abo-Madina
keywords: immediate and delayed micro-tensile bond strength; luting resin cements; regional dentin
references.citation: J Adhes Dent. 2000 Autumn;2(3):201-8
references.pmid: 11317393
references.citation: J Dent. 2006 Jan;34(1):52-61
references.pmid: 15922502
references.citation: J Esthet Restor Dent. 2005;17(3):165-71; discussion 171
references.pmid: 15996387
references.citation: Dent Mater. 2004 Sep;20(7):669-76
references.pmid: 15236942
references.citation: Arch Oral Biol. 1995 Dec;40(12):1109-18
references.pmid: 8850649
references.citation: J Dent Res. 1955 Dec;34(6):849-53
references.pmid: 13271655
references.citation: Dent Mater. 2002 May;18(3):269-75
references.pmid: 11823020
references.citation: J Dent Res. 2000 Jun;79(6):1385-91
references.pmid: 10890717
references.citation: J Dent Res. 1979 Apr;58(4):1364-70
references.pmid: 372267
references.citation: J Dent Res. 1999 Feb;78(2):699-705
references.pmid: 10029469
references.citation: Dent Mater. 2006 Jan;22(1):45-56
references.pmid: 16040114
references.citation: Dent Mater. 2008 Jul;24(7):944-50
references.pmid: 18190957
references.citation: J Dent Res. 2005 Feb;84(2):118-32
references.pmid: 15668328
references.citation: J Esthet Restor Dent. 2008;20(2):119-28; discussion 129
references.pmid: 18380843
references.citation: J Prosthet Dent. 1999 May;81(5):597-609
references.pmid: 10220666
references.citation: J Dent. 2001 Feb;29(2):139-44
references.pmid: 11239589
references.citation: J Prosthet Dent. 2004 Sep;92(3):265-73
references.pmid: 15343162
references.citation: J Dent Res. 1984 Feb;63(2):146-8
references.pmid: 6229557
references.citation: Dent Mater. 2007 Jan;23(1):71-80
references.pmid: 16426673
references.citation: Dent Mater. 2001 Mar;17(2):156-64
references.pmid: 11163386
references.citation: Dent Mater. 2005 Mar;21(3):224-31
references.pmid: 15705429
references.citation: J Dent Res. 2004 May;83(5):420-4
references.pmid: 15111636