IADR Abstract Archives
Tensile Bond Strength of a Novel Self-Adhesive-Resin Cement to Dentin
Objectives: Measure tensile bond strength (TBS) of a novel self-adhesive resin cement to dentin in self and light-cure modes.
Methods: Seven self-adhesive resin cements 1(EXP)-Experimental(3M); 2(RXU)-RelyX Unicem 2 Automix(3M); 3(CAU)-Calibra Universal(Dentsply/Sirona); 4(GCEM)-G-CEM LinkAce(GC); 5(MEC)-Maxcem Elite Chroma(KERR); 6(PSA)-Panavia SA cement Plus(Kuraray) and 7(SCP)-SpeedCEM Plus(Ivoclar) were used. Bovine incisor teeth were allocated into 14 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. For the self-cure mode,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 are shown in Figure-1 and Table-1. Failure modes are shown in Table-2 and Table-3. There was a statistically significant difference (p<0.05) in TBS between the cements. Subgroups are identified with letters in Figure-1. EXP was the only cement that did not have statistically significant difference (p>0.05) between curing modes. All cements presented adhesive failures. EXP presented two in the self-cure and one adhesive failure in the light-cure mode. All other were cohesive or combination of adhesive/cohesive failures.
Conclusions: Under the limitations of this study, it can be concluded that the EXP performed statistically significantly better in the self-curing mode. In light-curing mode, EXP, GCEM, RXU and SCP showed significantly highest TBS values. EXP obtained highest adhesion performance in both curing modes and presented combinations of adhesive/cohesive failures, indicating the limitations by the strength of the dentin.
Methods: Seven self-adhesive resin cements 1(EXP)-Experimental(3M); 2(RXU)-RelyX Unicem 2 Automix(3M); 3(CAU)-Calibra Universal(Dentsply/Sirona); 4(GCEM)-G-CEM LinkAce(GC); 5(MEC)-Maxcem Elite Chroma(KERR); 6(PSA)-Panavia SA cement Plus(Kuraray) and 7(SCP)-SpeedCEM Plus(Ivoclar) were used. Bovine incisor teeth were allocated into 14 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. For the self-cure mode,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 are shown in Figure-1 and Table-1. Failure modes are shown in Table-2 and Table-3. There was a statistically significant difference (p<0.05) in TBS between the cements. Subgroups are identified with letters in Figure-1. EXP was the only cement that did not have statistically significant difference (p>0.05) between curing modes. All cements presented adhesive failures. EXP presented two in the self-cure and one adhesive failure in the light-cure mode. All other were cohesive or combination of adhesive/cohesive failures.
Conclusions: Under the limitations of this study, it can be concluded that the EXP performed statistically significantly better in the self-curing mode. In light-curing mode, EXP, GCEM, RXU and SCP showed significantly highest TBS values. EXP obtained highest adhesion performance in both curing modes and presented combinations of adhesive/cohesive failures, indicating the limitations by the strength of the dentin.
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