Shear bond strength to feldspathic porcelain of two luting cements in combination with three surface treatments.
BACKGROUND
Although selection of clinically reliable bonding system is essential, limited information concerning the combination of durable ceramic bonding and luting agents is available.


OBJECTIVE
This in vitro study was conducted for the purpose of evaluating bond strengths of ceramic bonding materials in conjunction with their initiation and silane-activation modes.


METHODS
Disk-shaped fired porcelain specimens were air-abraded with alumina, then bonded with six combinations of three silane priming and two luting agents; specimens were also bonded with two luting cements without priming. Shear bond strengths were determined both before and after thermocycling.


RESULTS
For the two unprimed control groups, as well as two of the groups bonded with Panavia 21 cement (Clearfil Porcelain Bond and Panavia 21; Panavia Ceramic Primer and Panavia 21) the reduction in bond strengths after thermocycling was remarkable as compared with the corresponding prethermocycling groups (p < 0.05). A dual-cured luting cement (Clapearl DC) used with each of three silane priming materials (Clapearl Bonding Agent, Clearfil Porcelain Bond, and Panavia Ceramic Primer) exhibited consistent shear bond strength greater than 30 MPa after 20,000 thermocycles.


CONCLUSIONS
The above three systems appeared to be useful for the long-term clinical success of feldspathic porcelain restorations.
Matsumura
H
H
Department of Fixed Prosthodontics, Nagasaki University School of Dentistry, Japan.
Kato
H
H
Atsuta
M
M
D000388:Air; D000537:Aluminum Oxide / Q000737:chemistry; D000538:Aluminum Silicates / Q000737:chemistry*; D000704:Analysis of Variance; D003722:Dental Alloys / Q000737:chemistry; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry*; D005069:Evaluation Studies as Topic; D008422:Materials Testing; D017646:Organosilicon Compounds / Q000737:chemistry; D010710:Phosphates / Q000737:chemistry; D017680:Potassium Compounds / Q000737:chemistry*; D015203:Reproducibility of Results; D019279:Resin Cements / Q000737:chemistry; D012821:Silanes / Q000737:chemistry; D012833:Siloxanes / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013816:Thermodynamics
D000538:Aluminum Silicates; C076805:Clearfil Porcelain Bond; D003722:Dental Alloys; D003738:Dental Cements; D017646:Organosilicon Compounds; C093719:Panavia TPN-S; D010710:Phosphates; D017680:Potassium Compounds; D019279:Resin Cements; D012821:Silanes; D012833:Siloxanes; C109836:clapearl DC; C109838:clapearl bonding agent; C109837:panavia ceramic primer; C109835:silbione; D003776:Dental Porcelain; C016447:feldspar; C047040:Vita VMK 68; D000537:Aluminum Oxide