20.500.12556/RUL-155601 Rheological properties and setting kinetics of bioceramic hydraulic cements ProRoot MTA versus RS+ Hydraulic calcium silicate-based cements (HCSCs) have become a superior bioceramic alternative to epoxy-based root canal sealers in endodontics. A new generation of purified HCSCs formulations has emerged to address the several drawbacks of original Portland-based mineral trioxide aggregate (MTA). This study was designed to assess the physio-chemical properties of a ProRoot MTA and compare it with newly formulated RS+, a synthetic HCSC, by advanced characterisation techniques that allow for in situ analyses. Visco-elastic behaviour was monitored with rheometry, while phase transformation kinetics were followed by X-ray diffraction (XRD), attenuated total reflectance Fourier transform infrared (ATR-FTIR), and Raman spectroscopies. Scanning electron microscopy with energy-dispersive spectroscopy, SEM-EDS, and laser-diffraction analyses was performed to evaluate the compositional and morphological characteristics of both cements. While the kinetics of surface hydration of both powders, when mixed with water, were comparable, an order of magnitude finer particle size distribution of RS+ coupled with the modified biocompatible formulation proved pivotal in its ability to exert predictable viscous flow during working time, and it was more than two times faster in viscoelastic-to-elastic transition, reflecting improved handling and setting behaviour. Finally, RS+ could be completely transformed into hydration products, i.e., calcium silicate hydrate and calcium hydroxide, within 48 h, while hydration products were not yet detected by XRD in ProRoot MTA and were obviously bound to particulate surface in a thin film. Because of the favourable rheological and faster setting kinetics, synthetic, finer-grained HCSCs, such as RS+, represent a viable option as an alternative to conventional MTA-based HCSCs for endodontic treatments. hydraulic calcium silicate cements HCSCs mineral trioxide aggregate MTA bioactive materials handling rheological properties setting kinetics true false true Angleški jezik Ni določen Članek v reviji 2024-04-08 11:03:43 2024-04-08 11:03:44 2024-09-05 08:43:35 0000-00-00 00:00:00 2023 0 0 14 str. iss. 8, art. 3174 Vol. 16 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.1/.2 1996-1944 10.3390/ma16083174 149530371 materials-16-03174-v2.pdf materials-16-03174-v2.pdf 1 DDF167C9B8FFC310A9140DEEDFDEE294 474089dc23e1bffb77c46f8519a1cfe7b8845a186c81f80cf846b21b5bbb5228 3bdfe910-f587-11ee-937a-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=182572 https://www.mdpi.com/1996-1944/16/8/3174 0 1a19c8fb-f587-11ee-937a-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=182571 Medicinska fakulteta 0 0 0