Evaluation of the antimicrobial activity, quality of removal and influence on the bond strength of calcium hydroxide pastes associated with different substances

Piazza, Bruno

doi:10.11606/t.25.2019.tde-25112019-155653

Cited by 1 publication

(1 citation statement)

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“…Various studies have shown that different methods are not able to completely remove this substance from the root canal system and its removal from the canal is not easy (15)(16)(17)(18)(19). On the other hand, several studies indicate that the residual calcium hydroxide that may remain at the entrance of dentinal tubules and walls can reduce the sealer penetration into dentinal tubules and have negative effects on the bond strength of resin sealers to the dentin wall (20). AHplus Sealer is an epoxy-based resin sealer that has been used as a standard in several studies to evaluate the seal bond strength (21)(22)(23).…”

Section: Introductionmentioning

confidence: 99%

Unveiling the Calcium Hydroxide Impact: Comparison of Push-out Bond Strength in AHplus and ADseal Resin-based Endodontic Sealers

Habashi,

Baghban,

Nabavizadeh

et al. 2023

Preprint

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Objectives: This in vitro study aimed to evaluate effects of calcium hydroxide (Ca(OH)2) on bond-strength of two resin-based endodontic sealers, AHplus and ADseal. In light of ADseal's recent introduction to the dental market and the absence of research on the effects of Ca(OH)2 on its bonding strength to dentinal walls, our investigation sought to fill this gap in knowledge. Methods: Root canals of 128 single-rooted teeth were prepared and randomly divided into two groups (n = 64): Control group without Ca(OH)2 and experimental group with Ca(OH)2 inside canals. After a week of keeping samples at 100% humidity and 37°C, Ca(OH)2 was removed, and the samples were further subdivided into two subgroups (n = 32) for filling with AHplus sealer or ADseal sealer. Following another week of incubation, the samples were cut into 2mm thick plates and subjected to pressure. Maximum force was measured in Newton just before bond failure and calculated using push-out bond-strength in MPa. Results: The results showed average bonding-strength of AHplus sealer in treatment group with Ca(OH)2 was significantly lower than in group without Ca(OH)2 (p-value=0.00). However, no significant was observed in the average bonding-strength between the control and treatment groups with Ca(OH)2 in ADseal (p-value=0.36). Comparing control groups, the average bond strength of AHplus sealer was significantly higher than that of ADseal sealer (p-value=0.01). Interestingly, the average bonding-strength of ADseal Sealer in experimental group was significantly more than AHplus sealer (p-value=0.00). Conclusions: This study highlights that the presence of Ca(OH)2 decreases bonding-strength of AHplus sealer while it does not significantly affect the bond strength of ADseal sealers. These findings provide valuable insights into the interplay between calcium hydroxide and resin-based endodontic sealers, contributing to a deeper understanding of their performance and potential applications in clinical settings.

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