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Tytuł:
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Effect of different manipulations on the physical, chemical and microstructural characteristics of Biodentine.
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Autorzy:
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Domingos Pires M; Department of Endodontics, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal. Electronic address: .
Cordeiro J; Department of Endodontics, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal.
Vasconcelos I; Department of Endodontics, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal.
Alves M; Department of Endodontics, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal.
Quaresma SA; Department of Endodontics, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal.
Ginjeira A; Department of Endodontics, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal; Unidade de Investigação em Ciências Orais e Biomédicas (UICOB), Faculdade de Medicina Dentária, Universidade de Lisboa, Portugal.
Camilleri J; School of Dentistry, University of Birmingham, Birmingham, UK.
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Źródło:
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Dental materials : official publication of the Academy of Dental Materials [Dent Mater] 2021 Jul; Vol. 37 (7), pp. e399-e406. Date of Electronic Publication: 2021 Apr 15.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Publication: 1998- : Kidlington, Oxford, UK : Elsevier Science
Original Publication: Copenhagen : Munksgaard, c1985-
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MeSH Terms:
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Calcium Compounds*
Silicates*
Aluminum Compounds ; Drug Combinations ; Materials Testing ; Microscopy, Electron, Scanning ; Oxides ; Spectroscopy, Fourier Transform Infrared ; Surface Properties ; X-Ray Diffraction
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Contributed Indexing:
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Keywords: Biodentine; Ion release; Micro-hardness; Setting time; Tricalcium silicate; Water-to-powder ratio
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Substance Nomenclature:
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0 (Aluminum Compounds)
0 (Calcium Compounds)
0 (Drug Combinations)
0 (Oxides)
0 (Silicates)
404G39282C (tricalcium silicate)
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Entry Date(s):
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Date Created: 20210417 Date Completed: 20210629 Latest Revision: 20210629
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Update Code:
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20240104
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DOI:
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10.1016/j.dental.2021.03.021
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PMID:
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33863567
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Objective: The water to powder ratio and method of mixing is important for the properties of hydraulic cements. For this purpose a number of clinicians prefer premixed materials. Dental manufacturing companies provide predosed materials, however the manufacturer instructions are not always adhered to. The aim of this research is to investigate physical and chemical alterations of the tricalcium silicate-based cement Biodentine when manipulated according to the manufacturer's instructions (control) or changing the doses and mixing of the material components.
Methods: 6 groups were constituted according to different mixing and dosing of powder and liquid. The hydrated cements were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Calcium ion concentration of the leachate was also investigated. Assessment of the physical characteristics included setting time and microhardness.
Results: Microstructural differences were visible only in the Biodentine mixed manually with water, in which early hydration rate was also affected, with lower calcium ion release. Increase of Biodentine liquid increased the calcium ion release, but also increased the setting time. Manual manipulation required more liquid (both water and Biodentine liquid) added to the mixture to guarantee a similar consistency to the control. A decrease in setting time was also noted. All groups showed higher values of microhardness at 24 h compared to the freshly set materials. In the freshly set materials, there was an overall decrease in microhardness in all groups when compared to group control, particularly significant when increasing the dosage of Biodentine liquid.
Significance: When mixing Biodentine, altering the mixing procedure in terms of type and amount of liquid added to the powder and mixing device chosen has an effect on the physical, chemical and mechanical characteristics and surface topography of the material, when compared to Biodentine mixed according to the manufacturer's recommendations. Hence, the manufacturer's instructions should be strictly followed.
(Copyright © 2021 The Academy of Dental Materials. Published by Elsevier Inc. All rights reserved.)
