Bond strength of adhesive systems to mineral trioxide aggregate with different time intervals.
BACKGROUND
The aim of this study was to compare the shear bond strengths of various adhesive systems to white mineral trioxide aggregate (WMTA) with different time intervals.


METHODS
Two hundred cylindrical acrylic blocks with a hole (4-mm diameter and 2-mm height) were prepared. The holes were filled with WMTA, and the specimens were allocated into 5 groups. Forty specimens were stored for 4, 24, 48, 72, and 96 hours at 37°C and 100% humidity. Each group was divided into 4 subgroups: group 1, All-Bond SE (Bisco Inc, Schaumburg, IL); group 2, All-Bond 3 (Bisco Inc); group 3, One-Step Plus (Bisco Inc); and group 4, control. After the application of adhesive systems, composite resin (Aelite, Bisco) was applied over the WMTA. Shear bond strengths were measured using a universal testing machine, and the data were subjected to 1-way analysis of variance and the Scheffé post hoc test.


RESULTS
There was a significant difference between the 4-, 24-, 48-, 72-, and 96-hour measurements in all of the adhesive systems (P < .001). Among all time intervals, group 3 showed significantly higher bond strengths to WMTA than the other groups (P < .001). Groups 1 and 2 were similar (P = .365).


CONCLUSIONS
It was concluded that if a longer waiting time can be practiced after the mixing of WMTA, higher shear bond strength measurements can be obtained. Also, when WMTA was used with total-etch adhesive systems, it showed better shear bond strength.
Department of Pedodontics, Gazi University, Ankara, Turkey. dtdidem@hotmail.com
Didem
D
Atabek
Hilal
H
Sillelioğlu
Ayşegül
A
Olmez
D000134:Acid Etching, Dental / Q000379:methods; D000268:Adhesiveness; D017607:Aluminum Compounds / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry; D003799:Dental Stress Analysis / Q000295:instrumentation; D017220:Dentin-Bonding Agents / Q000737:chemistry; D004338:Drug Combinations; D005989:Glycerides / Q000737:chemistry; D006801:Humans; D006813:Humidity; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D010087:Oxides / Q000737:chemistry*; D019279:Resin Cements / 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
C485363:Aelite LS; C074864:All-Bond system; D017607:Aluminum Compounds; C103506:Bis-GMA, BPDM, HEMA dental-bonding resin; D017610:Calcium Compounds; D003188:Composite Resins; D003764:Dental Materials; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; D005989:Glycerides; D008689:Methacrylates; D010087:Oxides; D019279:Resin Cements; D012387:Root Canal Filling Materials; D017640:Silicates; C086631:mineral trioxide aggregate; C111558:phenyl methacrylate; C069750:glyceryl methacrylate; C005044:hydroxyethyl methacrylate; C039790:N-(4-tolyl)glycine-glycidyl methacrylate