1
|
Gandolfi MG, Taddei P, Zamparini F, Ottolenghi L, Polimeni A, Prati C. Dentine surface modification and remineralization induced by bioactive toothpastes. Int J Dent Hyg 2024; 22:554-574. [PMID: 37424392 DOI: 10.1111/idh.12710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 04/05/2023] [Accepted: 06/14/2023] [Indexed: 07/11/2023]
Abstract
OBJECTIVE In this study, dentine surface was analysed through Environmental-scanning-electron-microscopy (ESEM) with energy-dispersive-X-ray-spectrometry (EDX) and Fourier-transform-infrared-spectroscopy (FTIR) with attenuated total-reflectance (ATR) to assess the morpho-chemical changes and variations in mineralization degree after demineralizing treatment, after five toothpastes application (HA & Citrate toothpaste, Zinc-HA toothpaste, Calcium Sodium Phosphosilicate toothpaste, Arginine & Calcium carbonate toothpaste, Colgate-Triple-Action, and Control toothpaste), after soaking in artificial saliva and after citric acid attack. METHODS Ca/P, Ca/N and P/N ratios were calculated from EDX atomic data to evaluate the mineralization degree of dentine surface. The IR calcium phosphate (CaP)/collagen and carbonate/collagen ratios has been evaluated to assess the remineralization changes in dentine; the carbonate/collagen IR ratio was calculated to identify the nucleation of B-type-carbonated apatite and calcium carbonate. RESULTS ESEM-EDX and ATR-FTIR showed residuals of toothpastes after the treatments in all cases, with a general increase in the mineralization degree after soaking in artificial saliva and a decrease after acid attack. Treatment with Arginine & Calcium carbonate toothpaste showed the highest Ca/P value after treatment (Ca/P 1.62) and acid attack (Ca/P 1.5) in confirmation, IR showed the highest amount of carbonate after treatment and soaking in artificial saliva. Arginine and calcium carbonate toothpaste and HA and citrate toothpaste remained to a higher extent on the dentine surface and revealed a higher remineralization activity. These formulations showed higher resistance to demineralization attack, as demonstrated by a higher ICaP/IAmide II intensity ratio than those obtained after EDTA treatment. CONCLUSIONS Toothpastes that remained to a higher extent on dentine surface (arginine and calcium carbonate toothpaste in particular) were more able to promote remineralization. The formed calcium phosphate (CaPs) phase was intimately bound to dentine rather than a simple deposit.
Collapse
Affiliation(s)
- Maria Giovanna Gandolfi
- Laboratory of Green Biomaterials and Oral Pathology, School of Dentistry, Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Paola Taddei
- Biochemistry Unit, Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Fausto Zamparini
- Laboratory of Green Biomaterials and Oral Pathology, School of Dentistry, Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Livia Ottolenghi
- Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, Rome, Italy
| | - Antonella Polimeni
- Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, Rome, Italy
| | - Carlo Prati
- Endodontic Clinical Section, School of Dentistry, Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| |
Collapse
|
2
|
Taddei P, Di Foggia M, Zamparini F, Prati C, Gandolfi MG. Guttapercha Improves In Vitro Bioactivity and Dentin Remineralization Ability of a Bioglass Containing Polydimethylsiloxane-Based Root Canal Sealer. Molecules 2023; 28:7088. [PMID: 37894568 PMCID: PMC10609493 DOI: 10.3390/molecules28207088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 10/05/2023] [Accepted: 10/12/2023] [Indexed: 10/29/2023] Open
Abstract
Guttapercha (GP, trans-1,4-polyisoprene) is the most used tooth root filling material, and it must be used with an appropriate cement (typically a polydimethylsiloxane (PDMS)-based sealer) to ensure an adequate canal obturation. This study aimed to assess the bioactivity and dentin remineralization ability of a bioglass containing PDMS commercial endodontic sealer, BG-PDMS (GuttaFlow Bioseal), and to evaluate the possible influence of a GP cone (Roeko GP point) on the mineralization process. To this end, BG-PDMS disks were aged alone or in the presence of a GP cone in Hank's Balanced Salt Solution (28 d, 37 °C). Dentin remineralization experiments were carried out under the same conditions. Micro-Raman and IR analyses demonstrated that BG-PDMS is bioactive, thanks to the formation of a silica-rich layer with nucleation sites for B-type carbonated apatite deposition. This phase was thicker when BG-PDMS was aged in the presence of GP. The two materials influenced each other because GP, which alone did not show any bioactivity, nucleated a calcium phosphate phase under these conditions. Analogously, dentin remineralization experiments showed that BG-PDMS is able to remineralize dentin, especially in the presence of GP. Under the experimental conditions, GP acted as a templating agent for calcium phosphate deposition.
Collapse
Affiliation(s)
- Paola Taddei
- Biochemistry Unit, Department of Biomedical and Neuromotor Sciences, University of Bologna, Via Irnerio 48, 40126 Bologna, Italy;
| | - Michele Di Foggia
- Biochemistry Unit, Department of Biomedical and Neuromotor Sciences, University of Bologna, Via Irnerio 48, 40126 Bologna, Italy;
| | - Fausto Zamparini
- Endodontic Clinical Section, Unit of Odontostomatological Sciences, Department of Biomedical and Neuromotor Sciences, University of Bologna, Via San Vitale 59, 40136 Bologna, Italy; (F.Z.); (C.P.)
| | - Carlo Prati
- Endodontic Clinical Section, Unit of Odontostomatological Sciences, Department of Biomedical and Neuromotor Sciences, University of Bologna, Via San Vitale 59, 40136 Bologna, Italy; (F.Z.); (C.P.)
| | - Maria Giovanna Gandolfi
- Laboratory of Biomaterials and Oral Pathology, Unit of Odontostomatological Sciences, Department of Biomedical and Neuromotor Sciences, University of Bologna, Via San Vitale 59, 40136 Bologna, Italy;
| |
Collapse
|
3
|
Chen L, Tang Y, Zhao K, Liu J, Jiang X, Sun Y, Zhao Y, Tan Q, Yang Z, Wu Z. High water‐absorbent and fast‐expanding
PMMA
bone cement with double‐bridged structure. J Appl Polym Sci 2021. [DOI: 10.1002/app.50464] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Lei Chen
- School of Materials Science and Engineering Xi'an University of Technology Xi'an China
| | - Yufei Tang
- School of Materials Science and Engineering Xi'an University of Technology Xi'an China
| | - Kang Zhao
- School of Materials Science and Engineering Xi'an University of Technology Xi'an China
| | - Jiaxin Liu
- School of Materials Science and Engineering Xi'an University of Technology Xi'an China
| | - Xiashu Jiang
- School of Materials Science and Engineering Xi'an University of Technology Xi'an China
| | - Yani Sun
- School of Materials Science and Engineering Xi'an University of Technology Xi'an China
| | - Yan Zhao
- Institute of Orthopaedics Xi'jing Hospital, Fourth Military Medical University Xi'an China
| | - Quanchang Tan
- Institute of Orthopaedics Xi'jing Hospital, Fourth Military Medical University Xi'an China
| | - Zhao Yang
- Institute of Orthopaedics Xi'jing Hospital, Fourth Military Medical University Xi'an China
| | - Zixiang Wu
- Institute of Orthopaedics Xi'jing Hospital, Fourth Military Medical University Xi'an China
| |
Collapse
|
4
|
Taddei P, Affatato S. Comparative Raman study on the molecular structure and IN VIVO wear of poly(methyl methacrylate)-based devices used as temporary knee prostheses: Effect of the antibiotic. J Mech Behav Biomed Mater 2021; 116:104328. [PMID: 33508557 DOI: 10.1016/j.jmbbm.2021.104328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 12/16/2020] [Accepted: 01/09/2021] [Indexed: 11/24/2022]
Abstract
The infection rate of total knee arthroplasty is still high, in spite of the high success of this surgical procedure. The use of an antibiotic-loaded temporary spacer made of poly(methyl methacrylate) (PMMA) has been proposed to treat infected knee arthroplasties. This study was aimed at comparatively investigating, on a molecular scale, two types of spacers from the same manufacturer (Spacer K and Vancogenx-space knee, Tecres, Italy), which differ for the added antibiotic (gentamicin sulphate in Spacer K and gentamicin sulphate + vancomycin hydrochloride in Vancogenx). Raman spectroscopy was used to gain more insights into the possible effects of the antibiotic on the spacer composition and polymer structure both in the new components and after in vivo use. Vancogenx was found to contain a lower residual MMA content than Spacer K (about 0.15% versus 0.4%). The former contained a higher amount of isotactic stereosequences than the latter, while the syndiotactic content (the prevailing component) was not significantly different in the two prostheses. The presence of vancomycin hydrochloride influenced not only the degree of polymerization and PMMA tacticity and crystallinity, but in turn also the wear behavior. Actually, Spacer K retrievals were found more affected by in vivo implantation than Vancogenx-space knee ones, revealing slight variations in polymer tacticity and crystallinity and relative radiopacifier content, besides release of MMA and additives of polymerization. However, these changes did not appear worrisome, due to the temporary nature of the prosthesis. In view of these results, the addition of vancomycin hydrochloride could offer an advantage, in spite of the higher costs requested and the potential risks of its unselective use.
Collapse
Affiliation(s)
- Paola Taddei
- Dipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, Via Belmeloro 8/2, 40126, Bologna, Italy.
| | - Saverio Affatato
- Laboratorio di Tecnologia Medica, IRCCS - Istituto Ortopedico Rizzoli, Bologna, Italy
| |
Collapse
|
5
|
Secondary Root Canal Treatment with Reciproc Blue and K-File: Radiographic and ESEM-EDX Analysis of Dentin and Root Canal Filling Remnants. J Clin Med 2020; 9:jcm9061902. [PMID: 32570806 PMCID: PMC7355850 DOI: 10.3390/jcm9061902] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 06/11/2020] [Accepted: 06/12/2020] [Indexed: 12/14/2022] Open
Abstract
Secondary root canal treatment requires the complete removal of filling materials with different chemical-physical properties. A newly developed single-use NiTi instrument (Reciproc Blue, RB) may be more effective in root canal retreatment. The aim of the present study was to evaluate morphology and composition of remnants after retreatment with RB compared to traditional K-File technique, in canals obturated with Thermafil/AH Plus. Twenty-four single-rooted human teeth were shaped with NiTi obturated with AH-Plus/Thermafil and retreated using RB NiTi instruments or manual K-Files. Radiographs were taken to evaluate endodontic space and radiopacity of residual filling-material before/after procedures. After retreatment, samples were longitudinally split and observed by environmental scanning electron microscopy connected to energy dispersive X-Ray spectroscopy (ESEM-EDX) to analyze the debris/remnant position, microchemistry, and dentinal surface morphology. Time for retreatments was recorded and compared using one-way ANOVA (p-value = 0.05). Radiopaque filling residuals were found in both groups. RB system resulted statistically faster than manual K-File in retreatment procedure (p < 0.001). Root canal space radiographic appearance obtained after retreatment with RB was wider than K-File (p < 0.05). ESEM-EDX revealed 4 different morphological dentin area. Area-1: debris-free with typical Ca, P, and N composition of dentin and detected in 70% of the surface. Area-2: presence of deproteinized smear layer free from N and debris in 15% of the surface. Area-3: a thick packed smear layer N-free and with fine debris consisting of trace elements from sealer in 10% of the surface. Area-4: packed with debris and trace elements. No difference was observed between both instruments regarding root canal space appearance and ESEM-EDX analysis. Both systems were able to remove filling material but created a dentine morphology composed of packed debris and filling materials embedded into the smear layer. Dentin surface composition resulted in collagen depleted by irrigation procedures. The reciprocating system required less time to complete retreatment.
Collapse
|
6
|
Primus CM, Tay FR, Niu LN. Bioactive tri/dicalcium silicate cements for treatment of pulpal and periapical tissues. Acta Biomater 2019; 96:35-54. [PMID: 31146033 PMCID: PMC6717675 DOI: 10.1016/j.actbio.2019.05.050] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 05/15/2019] [Accepted: 05/19/2019] [Indexed: 12/11/2022]
Abstract
Over 2500 articles and 200 reviews have been published on the bioactive tri/dicalcium silicate dental materials. The indications have expanded since their introduction in the 1990s from endodontic restorative and pulpal treatments to endodontic sealing and obturation. Bioactive ceramics, based on tri/dicalcium silicate cements, are now an indispensable part of the contemporary dental armamentarium for specialists including endodontists, pediatric dentists, oral surgeons andfor general dentists. This review emphasizes research on how these materials have conformed to international standards for dental materials ranging from biocompatibility (ISO 7405) to conformance as root canal sealers (ISO 6876). Potential future developments of alternative hydraulic materials were included. This review provides accurate materials science information on these important materials. STATEMENT OF SIGNIFICANCE: The broadening indications and the proliferation of tri/dicalcium silicate-based products make this relatively new dental material important for all dentists and biomaterials scientists. Presenting the variations in compositions, properties, indications and clinical performance enable clinicians to choose the material most suitable for their cases. Researchers may expand their bioactive investigations to further validate and improve materials and outcomes.
Collapse
Affiliation(s)
- Carolyn M Primus
- Department of Endodontics, The Dental College of Georgia, Augusta University, USA.
| | - Franklin R Tay
- Department of Endodontics, The Dental College of Georgia, Augusta University, USA
| | - Li-Na Niu
- Department of Endodontics, The Dental College of Georgia, Augusta University, USA; State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, China; The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang, Hena, China
| |
Collapse
|
7
|
Di Foggia M, Prati C, Gandolfi MG, Taddei P. Spectroscopic and morphological data assessing the apatite forming ability of calcium hydroxide-releasing materials for pulp capping. Data Brief 2019; 23:103719. [PMID: 31372388 PMCID: PMC6661258 DOI: 10.1016/j.dib.2019.103719] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 01/20/2019] [Accepted: 01/24/2019] [Indexed: 11/18/2022] Open
Abstract
A pulp capping material must perform as a barrier and protect the dental pulpal complex by inducing the formation of a new dentin bridge or dentin-like tissue. Being a favorable condition for the healing process, the apatite forming ability of TheraCal (light-curable Portland-dimethacrylate cement) and Dycal (calcium hydroxide-based) pulp capping materials was studied in two simulated body fluids, i.e. Dulbecco’s Phosphate Buffered Saline (DPBS) and Hank’s Balanced Salt Solution (HBSS). The cements were analyzed before and after soaking in these media for different times (1–28 days) by ESEM-EDX, micro-Raman and IR spectroscopy. This data article refers to “An in vitro study on dentin demineralization and remineralization: collagen rearrangements and influence on the enucleated phase” (Di Foggia et al., 2019).
Collapse
Affiliation(s)
- Michele Di Foggia
- Biochemistry Unit, Department of Biomedical and Neuromotor Sciences, University of Bologna, Via Belmeloro 8/2, 40126 Bologna, Italy
| | - Carlo Prati
- Endodontic Clinical Section, Unit of Odontostomatological Sciences, Department of Biomedical and Neuromotor Sciences, University of Bologna, Via San Vitale 59, 40136 Bologna, Italy
| | - Maria Giovanna Gandolfi
- Laboratory of Biomaterials and Oral Pathology, Unit of Dental Sciences, Department of Biomedical and Neuromotor Sciences, University of Bologna, Via San Vitale 59, 40136 Bologna, Italy
| | - Paola Taddei
- Biochemistry Unit, Department of Biomedical and Neuromotor Sciences, University of Bologna, Via Belmeloro 8/2, 40126 Bologna, Italy
| |
Collapse
|
8
|
Di Foggia M, Prati C, Gandolfi MG, Taddei P. An in vitro study on dentin demineralization and remineralization: Collagen rearrangements and influence on the enucleated phase. J Inorg Biochem 2019; 193:84-93. [PMID: 30685550 DOI: 10.1016/j.jinorgbio.2019.01.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 12/24/2018] [Accepted: 01/10/2019] [Indexed: 01/17/2023]
Abstract
Dentin remineralization is of clinical relevance in the therapy of caries and dentin hypersensitivity. This study is aimed at gaining more insights on a molecular scale, through IR spectroscopy, into dentin demineralization and remineralization. The dentin demineralization by ethylenediaminetetraacetic acid, EDTA (17%, 2 h) significantly altered the secondary structure distribution of collagen, upon loss of interaction with calcium ions. To investigate dentin remineralization, previously demineralized human dentin slices were soaked in Dulbecco's Phosphate Buffered Saline (DPBS) or Hank's Balanced Salt Solution HBSS, in close contact with three commercial cements used as sustained releasing sources of Ca2+ and OH- ions (i.e. calcium hydroxide- and calcium silicate-based cements). IR spectroscopy showed the occurrence of remineralization under these conditions. Collagen did not lose its ability to chelate Ca2+, and these interactions allowed collagen to rearrange into a conformation similar to that of sound dentin. This process appeared slower in HBSS than DPBS, as also shown by the lower degree of maturation of the inorganic phase enucleated in the former medium (amorphous calcium phosphate versus B-type carbonated apatite). Collagen appeared to act as a spatial constraint to crystal deposition, affecting crystallinity and carbonate content of the enucleated phase. Remineralization was found to strongly depend on the calcium releasing ability of the cements. The fast formation of a rough apatite biocoating may represent a favorable clinical condition in the context of mineralized tissue regeneration.
Collapse
Affiliation(s)
- Michele Di Foggia
- Biochemistry Unit, Department of Biomedical and Neuromotor Sciences, University of Bologna, Via Belmeloro 8/2, 40126 Bologna, Italy
| | - Carlo Prati
- Endodontic Clinical Section, Unit of Odontostomatological Sciences, Department of Biomedical and Neuromotor Sciences, University of Bologna, Via San Vitale 59, 40136 Bologna, Italy
| | - Maria Giovanna Gandolfi
- Laboratory of Biomaterials and Oral Pathology, Unit of Odontostomatological Sciences, Department of Biomedical and Neuromotor Sciences, University of Bologna, Via San Vitale 59, 40136 Bologna, Italy
| | - Paola Taddei
- Biochemistry Unit, Department of Biomedical and Neuromotor Sciences, University of Bologna, Via Belmeloro 8/2, 40126 Bologna, Italy.
| |
Collapse
|
9
|
Gandolfi MG, Taddei P, Pondrelli A, Zamparini F, Prati C, Spagnuolo G. Demineralization, Collagen Modification and Remineralization Degree of Human Dentin after EDTA and Citric Acid Treatments. MATERIALS 2018; 12:ma12010025. [PMID: 30577625 PMCID: PMC6337713 DOI: 10.3390/ma12010025] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 12/13/2018] [Accepted: 12/18/2018] [Indexed: 11/23/2022]
Abstract
The aim of the study was to investigate the effects of several decalcifying agents used as irrigant solutions in endodontic treatment on collagen and mineral components of dentin. Coronal dentin discs from five caries-free human third molars with a smear layer were treated for one minute with a chelating solution (1% Ethylenediaminetetraacetic acid (EDTA), 10% EDTA, 17% EDTA, 10% citric acid). Mineralization degree (Ca/N and P/N atomic ratios, IR Iapatite/Iamide II and I1410(carbonate)/I554(phosphate) spectroscopic ratios) and possible collagen rearrangements (collagen infrared (IR) amide II e III shifts) were evaluated by environmental scanning electron microscopy (ESEM)/energy dispersive X-ray spectroscopy (EDX) and IR spectroscopy before and after treatment (T0) and after ageing (T24h and T2m) in simulated body fluid (SBF). At T0, analysis showed that the highest demineralizing effect was achieved using a 10% citric acid solution and 10% EDTA, while the smallest effect was observed when using 17% EDTA. No significant collagen modifications were detected upon treatment with 1% EDTA, while subtle changes were observed after the other treatments. At T24h or T2m, analyses showed the highest remineralization values for 1% EDTA and the lowest for 10% citric acid, mainly at T2m. The samples treated with 17% EDTA showed slight collagen rearrangements upon remineralization. In conclusion, the highest demineralizing effect was observed for 10% EDTA and 10% citric acid. Collagen rearrangement was found for all the treatments except for 1% EDTA. The highest remineralization capability in SBF values was recorded for 1% EDTA and the lowest for 10% citric acid. A slight collagen rearrangement upon remineralization was still present in 17% EDTA-treated samples. Clinical use as a chelating agent in the endodontic therapy of citric acid and concentrated EDTA solutions should be reconsidered.
Collapse
Affiliation(s)
- Maria Giovanna Gandolfi
- Laboratory of Biomaterials and Oral Pathology, Dental School, Department of Biomedical and NeuroMotor Sciences, University of Bologna, 40126 Bologna, Italy.
| | - Paola Taddei
- Biochemistry Unit, Department of Biomedical and NeuroMotor Sciences, University of Bologna, 40126 Bologna, Italy.
| | - Anna Pondrelli
- Laboratory of Biomaterials and Oral Pathology, Dental School, Department of Biomedical and NeuroMotor Sciences, University of Bologna, 40126 Bologna, Italy.
| | - Fausto Zamparini
- Laboratory of Biomaterials and Oral Pathology, Dental School, Department of Biomedical and NeuroMotor Sciences, University of Bologna, 40126 Bologna, Italy.
| | - Carlo Prati
- Endodontic Clinical Section, Dental School, Department of Biomedical and NeuroMotor Sciences, University of Bologna, 40126 Bologna, Italy.
| | - Gianrico Spagnuolo
- Department of Neuroscience and Reproductive and Odontostomatological Sciences, University of Napoli "Federico II", 80131 Napoli, Italy.
- Institute of Dentistry, I. M. Sechenov First Moscow State Medical University, 119146 Moscow, Russia.
| |
Collapse
|
10
|
Biswas N, Samanta A, Podder S, Ghosh CK, Ghosh J, Das M, Mallik AK, Mukhopadhyay AK. Phase pure, high hardness, biocompatible calcium silicates with excellent anti-bacterial and biofilm inhibition efficacies for endodontic and orthopaedic applications. J Mech Behav Biomed Mater 2018; 86:264-283. [PMID: 30006276 DOI: 10.1016/j.jmbbm.2018.06.046] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 06/26/2018] [Accepted: 06/27/2018] [Indexed: 01/06/2023]
Abstract
Here we report for the very first time the synthesis of 100% phase pure calcium silicate nanoparticles (CSNPs) of the α-wollastonite phase without using any surfactant or peptizer at the lowest ever reported calcination temperature of 850 °C. Further, the phase purity is confirmed by quantitative phase analysis. The nano-network like microstructure of the CSNPs is characterized by FTIR, Raman, XRD, FESEM, TEM, TGA, DSC etc. techniques to derive the structure property correlations. The performance efficacies of the CSNPs against gram-positive e.g., S. pyogenes and S. aureus (NCIM2127) and gram-negative e.g., E. coli (NCIM2065) bacterial strains are studied. The biocompatibility of the CSNPs is established by using the conventional mouse embryonic osteoblast cell line (MC3T3). In addition, the biofilm inhibition efficacies of two varieties of CSNPs e.g., CSNPs(W) and CSNPs(WC) are investigated. Further, the interconnection between ROS e.g., superoxide (O2.-) and hydroxyl radical (.OH) generation capabilities of CSNPs and their biofilm inhibition efficacies is clearly established for the very first time. Finally, the mechanical responses of the CSNPs at the microstructural length scale are investigated by nanoindentation. The results confirm that the α-wollastonite phases present in CSNPs(W) and CSNPs(WC) possess extraordinarily high nanohardness and Young's moduli values. Therefore, these materials are well suited for orthopaedic and endodontic applications.
Collapse
Affiliation(s)
- Nilormi Biswas
- Advanced Mechanical and Materials Characterization Division, CSIR-Central Glass and Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata 700032, India
| | - Aniruddha Samanta
- Advanced Mechanical and Materials Characterization Division, CSIR-Central Glass and Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata 700032, India; Department of Material Science and Nanotechnology, Jadavpur University, Kolkata 700032, India.
| | - Soumik Podder
- Department of Material Science and Nanotechnology, Jadavpur University, Kolkata 700032, India
| | - Chandan Kumar Ghosh
- Department of Material Science and Nanotechnology, Jadavpur University, Kolkata 700032, India
| | - Jiten Ghosh
- Advanced Mechanical and Materials Characterization Division, CSIR-Central Glass and Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata 700032, India
| | - Mitun Das
- Bioceramics and Coating Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata 700032, India
| | - Awadesh Kumar Mallik
- Fuel Cell & Battery Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata 700032, India
| | - Anoop Kumar Mukhopadhyay
- Advanced Mechanical and Materials Characterization Division, CSIR-Central Glass and Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata 700032, India.
| |
Collapse
|