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Yang SY, Han AR, Choi JW, Kim KM, Kwon JS. Novel antibacterial and apatite forming restorative composite resin incorporated with hydrated calcium silicate. Biomater Res 2023; 27:25. [PMID: 36978203 PMCID: PMC10053114 DOI: 10.1186/s40824-023-00364-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 03/15/2023] [Indexed: 03/30/2023] Open
Abstract
Abstract
Background
White Portland cement is a calcium silicate material. It exhibits antibacterial properties and is biocompatible. In addition, calcium silicate-based materials are known to release calcium ions and form apatite. The purpose of this study was to develop a novel bioactive restorative resin composite with antibacterial and apatite forming properties to prevent tooth caries at the interface of teeth and restorative materials, by incorporation of hydrated calcium silicate (hCS) derived from white Portland cement.
Methods
To prepare the experimental composite resins, a 30 wt% light-curable resin matrix and 70 wt% filler, which was mixed with hCS and silanized glass powder were prepared in following concentrations: 0, 17.5, 35.0, and 52.5 wt% hCS filler. The depth of cure, flexural strength, water sorption, solubility, and antibacterial effect were tested. After immersion in artificial saliva solution for 15, 30, 60, and 90 days, ion concentration by ICP-MS and apatite formation using SEM-EDS, Raman spectroscopy and XRD from experimental specimens were analyzed.
Results
All experimental groups showed clinically acceptable depths of cure and flexural strength for the use as the restorative composite resin. Water sorption, solubility, released Ca and Si ions increased with the addition of hCS to the experimental composite resin. Experimental groups containing hCS showed greater antibacterial effects compared with the 0 wt% hCS filler group (p < 0.05). The 52.5 wt% hCS filler group produced precipitates mainly composed of Ca and P detected as hydroxyapatite after immersion in artificial saliva solution for 30, 60, and 90 days.
Conclusions
This results show that composite resins containing hCS filler is effective in antibacterial effects. hCS has also apatite formation ability for reducing gap size of microleakage by accumulating hydroxyapatite precipitates at the restoration-tooth interface. Therefore, novel composite resin containing hCS is promising bioactive resin because of its clinically acceptable physiochemical properties, antibacterial properties, and self-sealing potential for prevention of microleakage for longer usage of restorations.
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Komandin GA, Zaytsev KI, Dolganova IN, Nozdrin VS, Chuchupal SV, Anzin VB, Spektor IE. Quantification of solid-phase chemical reactions using the temperature-dependent terahertz pulsed spectroscopy, sum rule, and Arrhenius theory: thermal decomposition of α-lactose monohydrate. OPTICS EXPRESS 2022; 30:9208-9221. [PMID: 35299355 DOI: 10.1364/oe.453528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
Transformations of the low-energy vibrational spectra are associated with structural changes in an analyte and closely related to the instability of weak chemical bounds. Terahertz (THz)/far-infrared optical spectroscopy is commonly used to probe such transformation, aimed at characterization of the underlying solid-phase chemical reactions in organic compounds. However, such studies usually provide quite qualitative information about the temperature- and time-dependent parameters of absorption peaks in dielectric spectra of an analyte. In this paper, an approach for quantitative analyses of the solid-phased chemical reactions based on the THz pulsed spectroscopy was developed. It involves studying an evolution of the sample optical properties, as a function of the analyte temperature and reaction time, and relies on the classical oscillator model, the sum rule, and the Arrhenius theory. The method allows one to determine the temperature-dependent reaction rate V1(T) and activation energy Ea. To demonstrate the practical utility of this method, it was applied to study α-lactose monohydrate during its temperature-induced molecular decomposition. Analysis of the measured THz spectra revealed the increase of the reaction rate in the range of V1 ≃ ~9 × 10-4-10-2 min-1, when the analyte temperature rises from 313 to 393 K, while the Arrhenius activation energy is Ea ≃ ~45.4 kJ/mol. Thanks to a large number of obtained physical and chemical parameters, the developed approach expands capabilities of THz spectroscopy in chemical physics, analytical chemistry, and pharmaceutical industry.
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Braun D, Rivalta A, Giunchi A, Bedoya-Martinez N, Schrode B, Venuti E, Della Valle RG, Werzer O. Surface Induced Phenytoin Polymorph. 1. Full Structure Solution by Combining Grazing Incidence X-ray Diffraction and Crystal Structure Prediction. CRYSTAL GROWTH & DESIGN 2019; 19:6058-6066. [PMID: 31728132 PMCID: PMC6839513 DOI: 10.1021/acs.cgd.9b00857] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 09/15/2019] [Indexed: 05/31/2023]
Abstract
Understanding the behavior and properties of molecules assembled in thin layers requires knowledge of their crystalline packing. The drug phenytoin (5,5-diphenylhydantoin) is one of the compounds that can be grown as a surface induced polymorph. By using grazing incidence X-ray diffraction, the monoclinic unit cell of the new form II can be determined, but, due to crystal size and the low amount of data, a full solution using conventional structure solving strategies fails. In this work, the full solution has been obtained by combining computational structure generation and experimental results. The comparison between the bulk and the new surface induced phase reveals significant packing differences of the hydrogen-bonding network, which might be the reason for the faster dissolution of form II with respect to form I. The results are very satisfactory, and the method might be adapted for other systems, where, due to the limited amount of experimental data, one must rely on additional approaches to gain access to more detailed information to understand the solid-state behavior.
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Affiliation(s)
- Doris
E. Braun
- Institute
of Pharmacy, University of Innsbruck, Innrain 52c, 6020 Innsbruck, Austria
| | - Arianna Rivalta
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Andrea Giunchi
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | | | - Benedikt Schrode
- Institute
of Solid State Physics, NAWI Graz, Graz
University of Technology, Petersgasse 16, 8010 Graz, Austria
- Institute
of Pharmaceutical Science, Department of Pharmaceutical Technology, University of Graz, Univertitaetsplatz 1, 8010 Graz, Austria
| | - Elisabetta Venuti
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Raffaele Guido Della Valle
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Oliver Werzer
- Institute
of Pharmaceutical Science, Department of Pharmaceutical Technology, University of Graz, Univertitaetsplatz 1, 8010 Graz, Austria
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Giunchi A, Rivalta A, Bedoya-Martínez N, Schrode B, Braun DE, Werzer O, Venuti E, Della Valle RG. Surface Induced Phenytoin Polymorph. 2. Structure Validation by Comparing Experimental and Density Functional Theory Raman Spectra. CRYSTAL GROWTH & DESIGN 2019; 19:6067-6073. [PMID: 33828438 PMCID: PMC8016182 DOI: 10.1021/acs.cgd.9b00863] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 09/15/2019] [Indexed: 06/12/2023]
Abstract
A method for structure solution in thin films that combines grazing incidence X-ray diffraction data analysis and crystal structure prediction was presented in a recent work (Braun et al. Cryst. Growth Des.2019, DOI: 10.1021/acs.cgd.9b00857). Applied to phenytoin form II, which is only detected in films, the approach gave a very reasonable, but not fully confirmed, candidate structure with Z = 4 and Z' = 2. In the present work, we demonstrate how, by calculating and measuring the crystal Raman spectrum in the low wavenumber energy region with the aim of validating the candidate structure, this can be further refined. In fact, we find it to correspond to a saddle point of the energy landscape of the system, from which a minimum of lower symmetry may be reached. With the new structure, with Z = 4 and Z' = 2, we finally obtain an excellent agreement between experimental and calculated Raman spectra.
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Affiliation(s)
- Andrea Giunchi
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Arianna Rivalta
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | | | - Benedikt Schrode
- Institute
of Pharmaceutical Science, Department of Pharmaceutical Technology, University of Graz, 8010 Graz, Austria
- Institute
of Solid State Physics, NAWI Graz, Graz
University of Technology, Petersgasse 16, 8010 Graz, Austria
| | - Doris E. Braun
- Institute
of Pharmacy, University of Innsbruck, Innrain 52c, 6020 Innsbruck, Austria
| | - Oliver Werzer
- Institute
of Pharmaceutical Science, Department of Pharmaceutical Technology, University of Graz, 8010 Graz, Austria
| | - Elisabetta Venuti
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Raffaele Guido Della Valle
- Department
of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
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Shah HS, Chaturvedi K, Zeller M, Bates S, Morris K. A threefold superstructure of the anti-epileptic drug phenytoin sodium as a mixed methanol solvate hydrate. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2019; 75:1213-1219. [PMID: 31484808 DOI: 10.1107/s2053229619010696] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Accepted: 07/30/2019] [Indexed: 11/11/2022]
Abstract
Phenytoin sodium, a salt of 5,5-diphenylimidazolidine-2,4-dione, or phenytoin, is commercially available in various dosage forms for its anti-epileptic properties to treat and prevent seizures. The title compound, poly[aquatris(μ3-4,4-diphenyl-2,5-dioxoimidazolidin-1-ido)trimethanoltrisodium(I)], [Na3(C15H11N2O2)3(CH4O)3(H2O)1.08]n, a methanol solvate and hydrate of phenytoin sodium, forms a modulated crystal structure that consists of a supercell made up of three close-to-identical repeat units. Each of the basic fragments consists of one phenytoin anion, a sodium cation, and either a methanol, or a methanol and a water molecule coordinated to the sodium ion, yielding a formula unit of Na(C15H11N2O2)(CH3OH)x(H2O)y for each of the three segments (x, y = 0 or 1; x + y = 1 or 2). Modulation along the b axis is introduced due to the presence or absence of water or methanol molecules at sodium and by the alternating torsion angles of one of the two phenytoin phenyl rings. Individual segments within the asymmetric unit are linked by covalent Na-O and Na-N bonds, with each sodium ion coordinated to one anionic amide N atom and three keto O atoms. The Na-N and one of the Na-O bonds connect (C15H11N2O2)·Na units along the modulation direction, creating an infinite [(C15H11N2O2)·Na]n chain that is further stabilized by intramolecular N-H...O hydrogen bonding parallel to [010]. The second Na-O bond connects this chain with a symmetry-equivalent copy of itself created by a screw-axis operation, yielding double strands of [(C15H11N2O2)·Na]n chains. Two of these double strands, propagating in opposite directions, constitute the content of the unit cell. Neighboring double strands are connected with each other to form layers perpendicular to the a axis, tethered together via O-H...O hydrogen bonds involving the water and methanol molecules. In addition to modulation, each of the repeat units also exhibits disorder of the modulated segments. Phenyl rings of each repeat unit are rotationally disordered, and sodium-coordinated methanol and water molecules are also positionally disordered and/or partially occupied. The solvated structure reported here, while not matching the patterns reported for any of the known forms of phenytoin sodium, does provide a first insight into the complications and complexities involved in resolving the structure of anhydrous phenytoin sodium.
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Affiliation(s)
- Harsh S Shah
- Department of Pharmaceutical Sciences, Long Island University, 1 University Plaza, Brooklyn, NY 11201, USA
| | - Kaushalendra Chaturvedi
- Department of Pharmaceutical Sciences, Long Island University, 1 University Plaza, Brooklyn, NY 11201, USA
| | - Matthias Zeller
- Department of Chemistry, Purdue University, 560 Oval Dr., W. Lafayette, IN 47907-2084, USA
| | - Simon Bates
- Triclinic Labs, 2660 Schuyler Avenue, Suite A, Lafayette, IN 47905, USA
| | - Kenneth Morris
- Lachman Institute of Pharmaceutical Analysis, Long Island University, 75 Dekalb Ave, Brooklyn, New York 11201, USA
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Tanaka R, Hattori Y, Ashizawa K, Otsuka M. Kinetics Study of Cocrystal Formation Between Indomethacin and Saccharin Using High-Shear Granulation With In Situ Raman Spectroscopy. J Pharm Sci 2019; 108:3201-3208. [PMID: 31279736 DOI: 10.1016/j.xphs.2019.06.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 06/06/2019] [Accepted: 06/20/2019] [Indexed: 10/26/2022]
Abstract
Pharmaceutical manufacturing processes are necessary to make solid dosage form even in cocrystal formation. In an effort to reduce the number of unit operations, high-shear wet granulation with cocrystallization system was proposed. In the present study, indomethacin-saccharin was chosen as a model compound, and the cocrystal formation kinetics was investigated during the consistent process. The role of each initial indomethacin crystal state (γ-form, α-form, or amorphous) for the kinetics was explored using in situ Raman spectroscopy with multivariate curve resolution by alternating least-squares analysis as a chemometrics. Obtained granules were characterized by X-ray diffraction and tablet dissolution testing. The Raman peaks assigned to indomethacin-saccharin cocrystal were increased with granulation when ethanol was used as a binding solvent. In addition, the reaction kinetics of run samples which had different indomethacin forms was distinguished by best fitting using Avrami-Erofeev or Ginstling-Brounshtein model. The kinetic variance depended on the initial thermodynamic state of indomethacin because they had a different crystallization mechanism for the cocrystal. The scalable and feasible granulation method is required in the pharmaceutical industry.
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Affiliation(s)
- Ryoma Tanaka
- Graduate School of Pharmaceutical Sciences, Musashino University, 1-1-20 Shin-machi, Nishi-Tokyo, Tokyo 202-8585, Japan; Department of Pharmaceutics, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota 55455
| | - Yusuke Hattori
- Graduate School of Pharmaceutical Sciences, Musashino University, 1-1-20 Shin-machi, Nishi-Tokyo, Tokyo 202-8585, Japan; Research Institute of Pharmaceutical Sciences, Musashino University, 1-1-20 Shin-machi, Nishi-Tokyo, Tokyo 202-8585, Japan
| | - Kazuhide Ashizawa
- Research Institute of Pharmaceutical Sciences, Musashino University, 1-1-20 Shin-machi, Nishi-Tokyo, Tokyo 202-8585, Japan
| | - Makoto Otsuka
- Graduate School of Pharmaceutical Sciences, Musashino University, 1-1-20 Shin-machi, Nishi-Tokyo, Tokyo 202-8585, Japan; Research Institute of Pharmaceutical Sciences, Musashino University, 1-1-20 Shin-machi, Nishi-Tokyo, Tokyo 202-8585, Japan.
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Wijethunga TK, Stojaković J, Bellucci MA, Chen X, Myerson AS, Trout BL. General Method for the Identification of Crystal Faces Using Raman Spectroscopy Combined with Machine Learning and Application to the Epitaxial Growth of Acetaminophen. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:9836-9846. [PMID: 30053784 DOI: 10.1021/acs.langmuir.8b01791] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Crystal morphology is one of the key crystallographic characteristics that governs the macroscopic properties of crystalline materials. The identification of crystal faces, or face indexing, is an important technique that is used to get information regarding a crystal's morphology. However, it is mainly limited to single crystal X-ray diffraction (SCXRD) and it is often not applicable to products of routine crystallizations becasue it requires high quality single crystals in a narrow size range. To overcome the limitations of the SCXRD method, we have developed a robust and convenient Raman face indexing method based on work by Moriyama et al. This method exploits small but detectable differences in Raman spectra of crystal faces caused by different orientations of the crystallographic axis relative to the direction and polarization of the excitation laser beam. The method requires the compilation of a Raman spectral library for each compound and must be built and validated by SCXRD face indexing. Once the spectral library is available for a compound, the identity of unknown crystal faces (from any crystal that is larger than laser beam) can be inferred by collecting and comparing the Raman spectra to spectra within the library. We have optimized this approach further by developing a machine-learning algorithm that identifies crystal faces by performing a statistical comparison of the spectra in the Raman library and the Raman spectra of the unknown crystal faces. Here, we report the development of the Raman face indexing method and apply it to three different epitaxial systems: Acetaminophen (APAP) grown as an overlayer crystal on d-mannitol (MAN), d-galactose (GAL), and xylitol (XYL) substrates. For each of these epitaxial systems, the crystals were grown under various experimental conditions and have a wide range of sizes and quality. Using the Raman face indexing method, we were able to perform high-throughput indexing of a large number of crystals from different crystallization conditions, which could not be achieved using SCXRD or other analytical techniques.
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Affiliation(s)
- Tharanga K Wijethunga
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Jelena Stojaković
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Michael A Bellucci
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Xingyu Chen
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Allan S Myerson
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Bernhardt L Trout
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
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8
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Yan S, Zhang H, Yang Z, Tang M, Zhang M, Du C, Cui HL, Wei D. Transformation and dehydration kinetics of methylene blue hydrates detected by terahertz time-domain spectroscopy. RSC Adv 2017. [DOI: 10.1039/c7ra07118c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Three methylene blue crystalline hydrates were identified by terahertz spectroscopy according to their different THz absorption features.
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Affiliation(s)
- Shihan Yan
- Chongqing Key Laboratory of Multi-Scale Manufacturing Technology
- Chongqing Institute of Green and Intelligent Technology
- Chinese Academy of Sciences
- Chongqing
- China
| | - Hua Zhang
- Chongqing Key Laboratory of Multi-Scale Manufacturing Technology
- Chongqing Institute of Green and Intelligent Technology
- Chinese Academy of Sciences
- Chongqing
- China
| | - Zhongbo Yang
- Chongqing Key Laboratory of Multi-Scale Manufacturing Technology
- Chongqing Institute of Green and Intelligent Technology
- Chinese Academy of Sciences
- Chongqing
- China
| | - Mingjie Tang
- Chongqing Key Laboratory of Multi-Scale Manufacturing Technology
- Chongqing Institute of Green and Intelligent Technology
- Chinese Academy of Sciences
- Chongqing
- China
| | - Mingkun Zhang
- Chongqing Key Laboratory of Multi-Scale Manufacturing Technology
- Chongqing Institute of Green and Intelligent Technology
- Chinese Academy of Sciences
- Chongqing
- China
| | - Chunlei Du
- Chongqing Key Laboratory of Multi-Scale Manufacturing Technology
- Chongqing Institute of Green and Intelligent Technology
- Chinese Academy of Sciences
- Chongqing
- China
| | - Hong-Liang Cui
- Chongqing Key Laboratory of Multi-Scale Manufacturing Technology
- Chongqing Institute of Green and Intelligent Technology
- Chinese Academy of Sciences
- Chongqing
- China
| | - Dongshan Wei
- Chongqing Key Laboratory of Multi-Scale Manufacturing Technology
- Chongqing Institute of Green and Intelligent Technology
- Chinese Academy of Sciences
- Chongqing
- China
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Yamashita M, Sasaki H, Moriyama K. Vapor Phase Alkyne Coating of Pharmaceutical Excipients: Discrimination Enhancement of Raman Chemical Imaging for Tablets. J Pharm Sci 2015; 104:4093-4098. [DOI: 10.1002/jps.24622] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 07/29/2015] [Accepted: 08/04/2015] [Indexed: 11/10/2022]
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