Shear bond strength of conventional glass ionomer cements bound to mineral trioxide aggregate.
BACKGROUND
This study measured the shear bond strength of conventional glass ionomer cements (GICs; Ketac Molar Easymix and Fuji IX) bonded to white mineral trioxide aggregate (WMTA) that had been allowed to set for 2 different time intervals.


METHODS
Forty-eight WMTA specimens were prepared; half were stored for 45 minutes, and the remaining 24 specimens were stored for 72 hours at 37 degrees C and 100% humidity. Then each group was divided into 2 subgroups of 12 specimens, and each GIC was layered on each of the 2 WMTA preparations. The GIC-WMTA shear bond strengths were measured and were compared by using one-way analysis of variance.


RESULTS
The shear bond strengths with the 45-minute and 72-hour WMTAs were 8.85 and 9.16 MPa, respectively, for Ketac Molar Easymix and 9.34 and 9.96 MPa, respectively, for Fuji IX. The GIC-WMTA bond strength was not different between GIC applications to WMTA that had set for 45 minutes versus 72 hours (P >.05).


CONCLUSIONS
GICs might be used over MTA after the MTA has set for 45 minutes to allow single-visit procedures.
Yesilyurt
Cemal
C
Department of Operative Dentistry, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey.
Yildirim
Tahsin
T
Taşdemir
Tamer
T
Kusgoz
Adem
A
D017607:Aluminum Compounds / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D001840:Dental Bonding; D003799:Dental Stress Analysis / Q000295:instrumentation; D004338:Drug Combinations; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D006813:Humidity; D008422:Materials Testing; D010087:Oxides / Q000737:chemistry*; D012387:Root Canal Filling Materials / Q000737:chemistry*; D033081:Shear Strength; D017640:Silicates / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors
D017607:Aluminum Compounds; D017610:Calcium Compounds; D004338:Drug Combinations; D005899:Glass Ionomer Cements; C515713:Ketac Molar Easymix; D010087:Oxides; D012387:Root Canal Filling Materials; D017640:Silicates; C110713:fuji IX; C086631:mineral trioxide aggregate