IADR Abstract Archives
Bonding Ability to Dentin of Resin-cement: Dual-cure vs. Self-cure
Objectives: One of the major concerns with resin-cements is their ability to achieve effective initial bonding to tooth substrate (Dent Mater 2010; 26: 608-615). The purpose of this study was to evaluate dual-cure mode versus self-cure mode of resin-cements on the shear bond-strength to dentin substrate (SBS). Five cement+adhesive types [Experimental Cement R1096/Prime & Bond elect: Dentsply/Caulk (DC), RelyX Ultimate/Scotchbond Universal: 3M ESPE (3E), Variolink Esthetic DC/AdheSE Universal: Ivoclar Vivadent (IV), ESTECEM/ESTELINK: Tokuyama Dental (TD), HPC-100/HPC-100 Primer: Kuraray Noritake (KN)], and three self-adhesive types [PermaCem 2.0: DMG (DM), G-Cem LinkAce: GC (GC), BeautiCem SA: Shofu (SF)] were used.
Methods: Dentin surfaces for adhesive types alone were pretreated by each primer. Stock stainless steel rods (3.5 mm diameter and 2 mm height) were positioned by a Teflon mold (3.6 mm diameter and 2.0 mm height) on dentin surfaces, and luted with each cement. SBS were measured immediately after setting (Dual-cure: at 3 min after the start of light irradiation, Self-cure: 10 min storage in 37 oC and 100 %RH) and after 24-h storage in water (37 oC). Statistical analyses were performed by t-Test (Dual-cure vs. Self-cure).
Results: Summary of SBS: Mean (S.D.), MPa, N=10, S: significant difference (p<0.05), NS: Not significant difference (p>0.05).
Adhesive type Self-adhesive type
DC 3M IV TD KN DM GC SF
Immediately:
Dual-cure 5.4(1.5) 15.3(1.7) 9.9(2.9) 17.9(4.2) 12.2(3.2) 5.5(1.9) 5.4(1.6) 8.4(2.3)
S S S S NS S NS S
Self-cure 3.7(1.1) 6.0(1.6) 3.9(1.2) 8.4(2.6) 13.5(3.5) 1.4(0.6) 6.7(1.8) 1.2(0.3)
After one-day:
Dual-cure 15.8(3.1) 19.5(4.2) 16.8(2.8) 19.0(3.1) 23.3(3.6) 13.9(3.1) 13.0(2.3) 12.8(2.5)
NS S S NS NS S NS NS
Self-cure 15.7(3.0) 14.0(3.5) 10.5(2.1) 16.4(3.3) 24.0(3.4) 6.9(1.2) 10.6(2.8) 11.7(3.1)
Conclusions: Light irradiation increased the SBS over self-cure alone immediately after setting, but one-day storage brought the same SBS without depending on light irradiation.
Methods: Dentin surfaces for adhesive types alone were pretreated by each primer. Stock stainless steel rods (3.5 mm diameter and 2 mm height) were positioned by a Teflon mold (3.6 mm diameter and 2.0 mm height) on dentin surfaces, and luted with each cement. SBS were measured immediately after setting (Dual-cure: at 3 min after the start of light irradiation, Self-cure: 10 min storage in 37 oC and 100 %RH) and after 24-h storage in water (37 oC). Statistical analyses were performed by t-Test (Dual-cure vs. Self-cure).
Results: Summary of SBS: Mean (S.D.), MPa, N=10, S: significant difference (p<0.05), NS: Not significant difference (p>0.05).
Adhesive type Self-adhesive type
DC 3M IV TD KN DM GC SF
Immediately:
Dual-cure 5.4(1.5) 15.3(1.7) 9.9(2.9) 17.9(4.2) 12.2(3.2) 5.5(1.9) 5.4(1.6) 8.4(2.3)
S S S S NS S NS S
Self-cure 3.7(1.1) 6.0(1.6) 3.9(1.2) 8.4(2.6) 13.5(3.5) 1.4(0.6) 6.7(1.8) 1.2(0.3)
After one-day:
Dual-cure 15.8(3.1) 19.5(4.2) 16.8(2.8) 19.0(3.1) 23.3(3.6) 13.9(3.1) 13.0(2.3) 12.8(2.5)
NS S S NS NS S NS NS
Self-cure 15.7(3.0) 14.0(3.5) 10.5(2.1) 16.4(3.3) 24.0(3.4) 6.9(1.2) 10.6(2.8) 11.7(3.1)
Conclusions: Light irradiation increased the SBS over self-cure alone immediately after setting, but one-day storage brought the same SBS without depending on light irradiation.