Effect of different remaining dentin thickness and long term water storage on dentin bond strength

Ting, Shihchun; Chowdhury, Abu Faem Mohammad Almas; Sun, Jihao; Kakuda, Shinichi; Sidhu, Sharanbir K.; Yoshida, Yasuhiro; Selimović, Denis; Sano, Hidehiko

doi:10.4012/dmj.2017-140

Cited by 11 publications

(18 citation statements)

References 22 publications

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“…In previous studies, the effect of RDTs, ranging from 0.5 to 4.5 mm, on bond strength was investigated [24,25]. However, it has been reported that 64-76% of the tooth structure is removed after the tooth preparation process [39].…”

Section: Discussionmentioning

confidence: 99%

“…Most previous studies measured the bond strength of bleached dentin without thermocycling [ 8 , 9 , 13 , 18 , 24 – 26 , 28 , 29 ]. Thermocycling is the in vitro process of subjecting a restoration and tooth to temperature limits similar to those experienced in the oral cavity [ 30 ].…”

Section: Discussionmentioning

confidence: 99%

“…After testing, the fracture surface was checked and confirmed under a measuring microscope at 40× magnification. The fracture modes were reported as follows: adhesive, failure at the adhesive-tooth interface in over 75% of the areas; cohesive, failure mainly in the resin cement such that over 75% of the tooth bonding area was covered with resin cement; and mixed, a combination of the abovementioned modes of fracture [12,24,37,38]. The failure mode of each specimen was recorded as 1 of 3 types mentioned above.…”

Section: Fracture Mode Analysismentioning

confidence: 99%

“…In addition to the bleaching regimens, specimen preparation, such as the remaining dentin thickness (RDT), may play an important role in the bond strength of resin composites to bleached dentin [23][24][25][26][27][28][29]. It has been reported that the bond strength of resin composites to dentin is significantly correlated with the RDT.…”

Section: Introductionmentioning

confidence: 99%

“…It has been reported that the bond strength of resin composites to dentin is significantly correlated with the RDT. The thicker the RDT is, the higher the bond strength of the dentin [24,25]. It could be postulated that the RDT influences the bleaching effects on the bond strength of resin composites to dentin and might be the cause of the inconsistencies in the previous reports.…”

Section: Introductionmentioning

confidence: 99%

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Effects of remaining dentin thickness on the bond strength of bleached dentin

et al. 2020

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Background: The bond strength of resin composites to dentin was reported to be related to either the remaining dentin thickness (RDT) or bleaching treatment. However, information is limited regarding the effects of RDT on the bond strength of bleached dentin. The present study aimed to investigate the effects of RDT on the microshear bond strength (μSBS) of resin cement to bleached dentin. Methods: A total of 120 dentin specimens were prepared and randomly divided into 2 groups: a bleaching group (group B) and a control group (group C). Hydrogen peroxide with a concentration of 35% (Ultradent, USA) was applied on the dentin surface for 2 × 1 d for group B, while no bleaching treatment was performed for group C. After the treatment, the specimens were finished and polished to obtain different RDTs (2, 1, and 0.5 mm) and divided into 3 groups of 20 specimens each. The bonding procedure was performed using Panavia V5 (Kuraray, Japan) with a bonding area of 0.785 mm 2. For each group, half of the specimens were subjected to 5000 thermal cycles (subgroup T), while the other half did not receive thermocycling (subgroup N) (n = 10). The specimens were then subjected to the μSBS test using a universal testing machine. Data were analyzed by a three-way analysis of variance (α = 0.05). The fracture modes of the specimens were confirmed with a measuring microscope. Representative specimens with different fracture modes were observed with scanning electron microscopy (SEM). Results: The μSBS values were significantly affected by bleaching treatment (p < 0.001), whereas no significant effect was observed for thermocycling (p = 0.293). In terms of RDT, a significantly different μSBS value was found among the subgroups with different RDTs in group C (p = 0.003). However, the RDT did not significantly affect the μSBS values of bleached dentin in group B (p = 0.779). The μSBS values were significantly lower in group B than in group C (p < 0.001). A higher percentage of adhesive failure was observed in group B than in group C. Conclusion: Based on the present findings, it can be concluded that the RDT did not affect the bond strength of resin cement to bleached dentin. Clinical significance: Since RDT did not affect the bond strength of resin cement to bleached dentin, bonding procedures should not be performed immediately after intracoronal bleaching, even if the dentin is planned to be removed due to a tooth preparation process.

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Section: Discussionmentioning

confidence: 99%