A new 1-step self-etching bond system "DCB-100" (Kuraray Medical Inc.) has recently been developed. "DCB-100" is a dual-cured bond system, which consists of 2 components, liquid A and liquid B. Liquid A is comprised of an adhesive phosphate monomer (MDP), methacrylate monomers, initiators and nano-filler. Liquid B is comprised of water, ethanol and initiators. Objectives: The purpose of this study was to compare the adhesive properties to tooth structures of "DCB-100" with those of LINER BOND 2V (Kuraray Medical Inc.) and other dual-cured bond systems. Methods: Bovine dentin surfaces were treated with "DCB-100", air-dried, and cured with a halogen light (JETLITE3000/J.Morita). Then dual-cured composite-resin CLEARFIL DC CORE AUTOMIX (Kuraray Medical Inc.) was applied. Other core buid-up systems were treated according to each manufacturer's instruction, respectively. All samples were stored in 37˚C water for 24 hours prior to performing the tensile bond strength tests. Results: Table 1 showed the tensile bond strength of each adhesive. "DCB-100" showed similar in bond strength to LINER BOND 2V and superior one to other dual-cured bond systems in this study.
Table.1 Tensile bond strength to bovine dentin MPa (SD)
|
Core build-up system |
Curing mode; Bond/Composite |
||
|
Bond |
Composite |
light/light |
light/self |
|
DCB-100 |
DC CORE AUTOMIX |
17.1(7.6) |
17.4(4.0) |
|
LINER BOND 2V |
DC CORE AUTOMIX |
19.7(9.4) |
19.6(8.0) |
|
Prime & Bond NT+ Self Cure Activator |
FluoroCore |
13.2(6.2) |
10.9(5.6) |
|
AdheSE |
MultiCore |
12.5(5.9) |
3.5(2.8) |
|
UnifilCore SELF-ETCHING BOND |
UnifilCore |
10.9(2.8) |
13.7(3.3) |
Conclusions: These results indicated that "DCB-100" exhibits reliable clinical performance equal or superior to dual-cured bond system used in this study.