Influence of ultrasonic agitation on bond strength, marginal adaptation, and tooth discoloration provided by three coronary barrier endodontic materials

Abstract

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Micro‐CT analysis of the marginal adaptation and porosity associated with ultrasonic activation of coronally placed tricalcium silicate‐based cements

“…Aguiar et al compared the marginal adaptation of Biodentine, MTA Repair HP and MTA Angelus and concluded that Biodentine provided a better adaptation than others. Also, ultrasonic activation favoured a better adaptation of all three coronal barrier materials (12). They claimed that the mechanical vibration of ultrasonic energy provides better penetration of material into the dentinal tubules.…”

“…In previous studies, stereomicroscopy, scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM) and micro-CT have been used to evaluate the marginal adaptation of MTA to the dentin wall; however, these studies are focused on root-end filling and apical plug adaptation (16)(17)(18)(19). Coronal marginal adaptation evaluation was performed in one of these studies, Table 1 The median with quartile values of the external voids between dentine-coronal barrier material, microporosity and coronal barrier material volume (mm 3 but the CLSM technique was used (12). In another study, the effect of intracanal medicaments on marginal adaptation was evaluated (13).…”

“…In a study that evaluates both mixing technique and ultrasonic activation on the marginal adaptation and porosity of MTA material apical plugs, it has been stated that while mechanical mixing yielded less porosity within the material, there was no difference between hand condensation and ultrasonic activation on the marginal adaptation (11). On the other hand, Aguiar et al reported a better adaptation of coronal barrier materials with ultrasonic agitation (12).…”

Intratubular penetration of endodontic sealers depends on the fluorophore used for CLSM assessment

“…Fluo‐3 has been deployed mainly to detect intracellular calcium ion gradients by CLSM or flow cytometry in biological chemistry (Jeong et al, 2017; Minta, Kao, & Tsien, 1989). It is a non‐fluorescent indicator that significantly increases fluorescence after binding to calcium (Aguiar et al, 2019). The calcium in calcium silicate‐based sealers binds to Fluo‐3 and promotes the fluorescence of the sealer observed at CLSM (Aguiar et al, 2019; Jeong et al, 2017).…”

“…It is a non‐fluorescent indicator that significantly increases fluorescence after binding to calcium (Aguiar et al, 2019). The calcium in calcium silicate‐based sealers binds to Fluo‐3 and promotes the fluorescence of the sealer observed at CLSM (Aguiar et al, 2019; Jeong et al, 2017).…”