title: Effectiveness of two-liquid silane primers on bonding sintered feldspathic porcelain with a dual-cured composite luting agent.
abstract: The purpose of the current study was to evaluate the effect of two-component ceramic primers on the bond strength of a composite material joined to a sintered porcelain material. Two sizes of porcelain discs (VMK 68; 10 and 8 mm in diameter by 2.5 mm thick) were ground (No. 1000 SiC), and surface-conditioned using one of the following systems: (i) unprimed, (ii) Liquid A of the Porcelain Liner M material (PLM-A), (iii) Liquid B of Porcelain Liner M (PLM-B), (iv) Liquids A and B of Porcelain Liner M (PLM-AB), (v) Liquid A of the Tokuso Ceramics Primer material (TCP-A), (vi) Liquid B of Tokuso Ceramics Primer (TCP-B) and (vii) Liquids A and B of Tokuso Ceramics Primer (TCP-AB). All specimens were bonded with the Bistite II dual-cured composite luting agent, and shear bond strengths were determined both after 24 h immersion in water and after subsequent thermocycling (4-60 degrees C, 1 min each, 20,000 cycles). Of the seven groups assessed, two groups (PLM-AB and TCP-AB) showed the greatest bond strength both before (30.7 MPa for PLM-AB and 29.7 MPa for TCP-AB) and after (19.7 MPa for PLM-AB and 22.4 MPa for TCP-AB) thermocycling (P < 0.05). No significant differences were found between the PLM-AB and TCP-AB groups regardless of the application of thermocycling (P > 0.05). It can be concluded that both of the acid-catalysed two-liquid ceramic primers showed superior bonding to the unhydrolysed single-liquid silane agents (PLM-B and TCP-A) when the feldspathic porcelain was bonded with the Bistite II luting composite.
authors.affiliation: Department of Fixed Prosthodontics, Nagasaki University Hospital of Dentistry, Nagasaki, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nogami
authors.forename: N
authors.initials: N
authors.lastname: Tanoue
authors.forename: M
authors.initials: M
authors.lastname: Atsuta
authors.forename: H
authors.initials: H
authors.lastname: Matsumura
mesh_terms: D000704:Analysis of Variance; D001840:Dental Bonding; D003738:Dental Cements; D003776:Dental Porcelain; D008422:Materials Testing; D012821:Silanes
chemical_list: D003738:Dental Cements; D012821:Silanes; D003776:Dental Porcelain