Abstract:
OBJECTIVES:To assess whether the bonding potential to dentin of self-adhesive resin cements was affected by their pre-cure temperature. METHODS:Composite overlays (Paradigm MZ100, 3M ESPE) were luted on 100 extracted molars with G-Cem (GC Corp.), BisCem (Bisco), Multilink Sprint (Ivoclar Vivadent), SAC-A (Kuraray Co.), XP Bond/Calibra (Detrey Dentsply). The cements were used at pre-cure temperatures that recur in their handling (4 degrees C refrigerator, 24 degrees C room and 37 degrees C intraoral), as well as following pre-heating up to 60 degrees C. Microtensile bond strengths to dentin were measured and compared with statistical tests. Scanning electron microscope observations of cement-dentin interfaces were performed. RESULTS:The bond strength of G-Cem and Calibra was not significantly affected by temperature changes from refrigerator storage to intraoral application. At any assessed pre-cure temperature the total-etch luting agent Calibra achieved a significantly stronger adhesion than the auto-adhesive cements. Limited to null adhesion was yielded by BisCem and SAC-A. The procedure of 60 degrees C pre-heating, proposed in previous studies for restorative resin composites, was of no use for the tested luting agents. Only the total-etch luting agent Calibra developed a distinct hybrid layer. The self-adhesive cements exhibited a more superficial interaction with dentin. CONCLUSIONS:Regardless of the pre-cure temperature, the bonding potential of the self-adhesive resin cements was inferior to that of the total-etch luting agent tested as control. The adhesive properties of the BisCem and SAC-A were extremely scarce.
journal_name
J Dentjournal_title
Journal of dentistryauthors
Cantoro A,Goracci C,Carvalho CA,Coniglio I,Ferrari Mdoi
10.1016/j.jdent.2009.02.006subject
Has Abstractpub_date
2009-06-01 00:00:00pages
454-61issue
6eissn
0300-5712issn
1879-176Xpii
S0300-5712(09)00044-Xjournal_volume
37pub_type
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