Comparative evaluation of volumetric changes of three different retrograde calcium silicate materials placed under diffe
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Comparative evaluation of volumetric changes of three different retrograde calcium silicate materials placed under different pH condititions So Yeon Kwon and Min‑Seock Seo*
Abstract Background: The present study aimed to compare the volumetric changes of three calcium silicate cements after retrofilling and placing under different pH conditions via micro-computed tomography (micro-CT) scan. Methods: Forty-two extracted human single-rooted teeth were randomly assigned to three groups according to the retrofilling materials used (Biodentine, Endocem MTA, and ProRoot MTA). Each group was divided into two subgroups according to the setting condition. The teeth in one group were immersed in normal saline for 5 days at room tem‑ perature, and the teeth in the other group were immersed in butyric acid (pH = 5.4) for 5 days at room temperature. The volume ratios of the retrofilling material were calculated via micro-CT imaging. Results: The volume ratios of the Biodentine and Endocem MTA groups were significantly different between the two setting environment, and these groups had significantly lower filled volume ratio (Vf, %) in the acidic environment than in the saline environment (pH = 5.4). Meanwhile, the volume ratio of the ProRoot MTA group did not significantly differ between the two setting environments. All materials under the acidic setting condition had relative radiolu‑ cency in the area in contact with the acidic solution. Conclusion: The Vf ratio of the Biodentine and Endocem MTA cements was significantly lower in the acidic environ‑ ment than in the saline environment. No statistically significant difference was observed in the Vf ratio of ProRoot MTA between the two setting environments. Keywords: Calcium silicate cement, Human incisors, Retrofilling, Acidic setting condition, Micro-computed tomogrphy Background Mineral trioxide aggregate (MTA) is a calcium silicatebased cement commonly used in endodontic treatment, such as perforation repair or root end filling in apical surgery. It has several advantages in terms of biocompatibility, sealing ability, and setting ability in a hydrophilic *Correspondence: [email protected] Department of Conservative Dentistry, Wonkwang University Daejeon Dental Hospital, 77 Dunsan‑Ro, Seo‑Gu, Daejeon 35233, Republic of Korea
condition. In terms of advantages, particularly during surgeries, MTA can reduce micro-leakage at the end of the apex when used as a retrofilling material, act as a stable barrier, and improve the healing ability of the periapical tissue with high biocompatibility [1–3]. Nevertheless, MTA has some disadvantages, which typically include difficulty in handling and slow setting time [4]. Challenges in handling make it difficult to fill MTA into the cavity [5]. In apical surgery, a long setting time makes it difficult to confirm complete setting of
© The Author(s) 2020. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution
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