IADR Abstract Archives
Tensile Bond Strength of a Novel-Adhesive-Resin Cement to Dentin
Objectives: Measure tensile bond strength (TBS) of a novel adhesive resin cement to bovine dentin compared to other adhesive resin cements in the self-cure mode.
Methods: Four different adhesive-resin cements, 1(EXP)-Experimental Cement(3M Oral Care); 2(NX3)-Nexus™ NX3(Kerr); 3(PV5)-Panavia V5(Kuraray) and 4(VES)-Variolink®Esthetic(Ivoclar) were used with their correspondent adhesive system, a(EXA)-Experimental Adhesive(3M Oral Care); b(XTR)-Optibond™ XTR (Kerr); c(PTP)-Panavia V5 Tooth Primer(Kuraray) and d(ADU)-Adhese®Universal(Ivoclar) that was light cured. Bovine incisor teeth were allocated into 4 groups (n=12). Dentin was exposed and polished using a 320-grit sandpaper. Stainless-steel 4mm rods were cemented onto moist dentin. Excess cement was removed immediately. Airblock(Dentsply/Sirona) was applied around the specimensbefore storage (10min) under pressure at 36°C. For the light-cure mode, an LED unit (Elipar Deep Cure, 3M) was used to polymerize (40s) specimens. After initial preparation, the pressure was relieved, specimens were washed off with distilled water and stored at 36°C in 100% relative humidity for 24h. TBS was performed in a universal testing machine (Zwick/Roell) with a crosshead speed of 1mm/min. Results were analyzed with ANOVA followed by Tukey HSD test (α=0.05).
Results: Means and standard deviations of TBS values are shown in Figure1 and Table1. Failure modes are shown in Table2. There was a statistically significant difference (p<0.05) in TBS values between the tested cements. All cements presented with adhesive, cohesive and a mixture of adhesive/cohesive failures. One sample of NX3 failed before testing.
Conclusions: Under the limitations of this study, it can be concluded that there was no statistical significant difference between PV5 + PTP and the new EXP + EXA in the self-cure mode. NX3 and XTR presented the statistically lowest mean values. Many samples failed due to cohesive dentin failure, indicating the limitations of the study by the strength of the dentin.
Methods: Four different adhesive-resin cements, 1(EXP)-Experimental Cement(3M Oral Care); 2(NX3)-Nexus™ NX3(Kerr); 3(PV5)-Panavia V5(Kuraray) and 4(VES)-Variolink®Esthetic(Ivoclar) were used with their correspondent adhesive system, a(EXA)-Experimental Adhesive(3M Oral Care); b(XTR)-Optibond™ XTR (Kerr); c(PTP)-Panavia V5 Tooth Primer(Kuraray) and d(ADU)-Adhese®Universal(Ivoclar) that was light cured. Bovine incisor teeth were allocated into 4 groups (n=12). Dentin was exposed and polished using a 320-grit sandpaper. Stainless-steel 4mm rods were cemented onto moist dentin. Excess cement was removed immediately. Airblock(Dentsply/Sirona) was applied around the specimensbefore storage (10min) under pressure at 36°C. For the light-cure mode, an LED unit (Elipar Deep Cure, 3M) was used to polymerize (40s) specimens. After initial preparation, the pressure was relieved, specimens were washed off with distilled water and stored at 36°C in 100% relative humidity for 24h. TBS was performed in a universal testing machine (Zwick/Roell) with a crosshead speed of 1mm/min. Results were analyzed with ANOVA followed by Tukey HSD test (α=0.05).
Results: Means and standard deviations of TBS values are shown in Figure1 and Table1. Failure modes are shown in Table2. There was a statistically significant difference (p<0.05) in TBS values between the tested cements. All cements presented with adhesive, cohesive and a mixture of adhesive/cohesive failures. One sample of NX3 failed before testing.
Conclusions: Under the limitations of this study, it can be concluded that there was no statistical significant difference between PV5 + PTP and the new EXP + EXA in the self-cure mode. NX3 and XTR presented the statistically lowest mean values. Many samples failed due to cohesive dentin failure, indicating the limitations of the study by the strength of the dentin.
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