1
|
Ajcharanukul O, Kosakarn P, Sujjapong M, Berkbandee S, Bussabong P. Increased Fluorohydroxyapatite across Dentin after Fluoride Iontophoresis. J Dent Res 2024:220345241254017. [PMID: 38808538 DOI: 10.1177/00220345241254017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024] Open
Abstract
Due to the multiple factors contributing to dentin demineralization and hypersensitivity among individuals, the effectiveness of the available treatments in the long term remains unclear. A recent study reported a simple strategy to potentially mimic natural remineralization with increased crystallization on the enamel caries using fluoride iontophoresis. Such an effect is also ideal for accomplishing dentin biomineralization and structural strength. This study aimed to investigate structural and compositional characteristics and permeability changes after fluoride iontophoresis with different polarities, cathodal iontophoresis (CIP), anodal iontophoresis (AIP), and the control without iontophoresis for the treatment of etched dentin under simulated pulpal pressure. The 24 premolars were divided into 3 groups: CIP, AIP, and topical application of 5% sodium fluoride (NaF) for 40 s. Relative to before treatment, iontophoresis with both polarities significantly decreased the permeability with a visible increase in occluding tubules containing crystal formation and growth throughout the dentin structure and depth. The CIP not only restored the etched dentin surface into a sound condition but also reinforced the dentin across the structure and depth by the synergistic effects of remineralization, increasing crystal formation and transformation toward the more crystalline structure of fluorohydroxyapatite. Following topical treatment, X-ray diffraction analysis and Raman spectra revealed a significant reduction in the crystal size and crystallinity associated with the raised B-type carbonate substitution into the hydroxyapatite compared with that in the sound dentin. The result was the first to reveal the ideal strategy to rapidly restore the etched dentin surface into a sound condition, including reinforcing the dentin across the structure and depth by the synergistic effects of decreasing permeability, increasing crystal formation, and transformation toward the more crystalline structure of fluorohydroxyapatite using the 5% NaF applied with the DC cathode iontophoresis. The technique is noninvasive and simple and deserves further development for clinical application.
Collapse
Affiliation(s)
- O Ajcharanukul
- Department of Stomatology, Faculty of Dentistry, Srinakharinwirot University, Bangkok, Thailand
| | - P Kosakarn
- Department of Stomatology, Faculty of Dentistry, Srinakharinwirot University, Bangkok, Thailand
| | - M Sujjapong
- Department of Stomatology, Faculty of Dentistry, Srinakharinwirot University, Bangkok, Thailand
| | - S Berkbandee
- Department of Stomatology, Faculty of Dentistry, Srinakharinwirot University, Bangkok, Thailand
| | - P Bussabong
- Department of Stomatology, Faculty of Dentistry, Srinakharinwirot University, Bangkok, Thailand
| |
Collapse
|
2
|
Choe Y, Li CJ, Yeo DH, Kim YJ, Lee JH, Lee HH. Hierarchically porous surface of HA-sandblasted Ti implant screw using the plasma electrolytic oxidation: Physical characterization and biological responses. J Biomater Appl 2024; 38:1100-1117. [PMID: 38580320 DOI: 10.1177/08853282241246210] [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] [Indexed: 04/07/2024]
Abstract
The surface topological features of bioimplants are among the key indicators for bone tissue replacement because they directly affect cell morphology, adhesion, proliferation, and differentiation. In this study, we investigated the physical, electrochemical, and biological responses of sandblasted titanium (SB-Ti) surfaces with pore geometries fabricated using a plasma electrolytic oxidation (PEO) process. The PEO treatment was conducted at an applied voltage of 280 V in a solution bath consisting of 0.15 mol L-1 calcium acetate monohydrate and 0.02 mol L-1 calcium glycerophosphate for 3 min. The surface chemistry, wettability, mechanical properties and corrosion behavior of PEO-treated sandblasted Ti implants using hydroxyapatite particles (PEO-SB-Ti) were improved with the distribution of calcium phosphorous porous oxide layers, and showed a homogeneous and hierarchically porous surface with clusters of nanopores in a bath containing calcium acetate monohydrate and calcium glycerophosphate. To demonstrate the efficacy of PEO-SB-Ti, we investigated whether the implant affects biological responses. The proposed PEO-SB-Ti were evaluated with the aim of obtaining a multifunctional bone replacement model that could efficiently induce osteogenic differentiation as well as antibacterial activities. These physical and biological responses suggest that the PEO-SB-Ti may have a great potential for use an artificial bone replacement compared to that of the controls.
Collapse
Affiliation(s)
- YoungEun Choe
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, Republic of Korea
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea
| | - Cheng Ji Li
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, Republic of Korea
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea
| | - Dong-Hyeon Yeo
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, Republic of Korea
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea
| | - Yu-Jin Kim
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, Republic of Korea
- Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan, Republic of Korea
| | - Jung-Hwan Lee
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, Republic of Korea
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea
- Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan, Republic of Korea
- Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, Republic of Korea
- Cell & Matter Institute, Dankook University, Cheonan, Republic of Korea
| | - Hae-Hyoung Lee
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, Republic of Korea
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea
- Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan, Republic of Korea
| |
Collapse
|
3
|
Liu H, Jiang H, Liu X, Wang X. Physicochemical understanding of biomineralization by molecular vibrational spectroscopy: From mechanism to nature. EXPLORATION (BEIJING, CHINA) 2023; 3:20230033. [PMID: 38264681 PMCID: PMC10742219 DOI: 10.1002/exp.20230033] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Accepted: 06/25/2023] [Indexed: 01/25/2024]
Abstract
The process and mechanism of biomineralization and relevant physicochemical properties of mineral crystals are remarkably sophisticated multidisciplinary fields that include biology, chemistry, physics, and materials science. The components of the organic matter, structural construction of minerals, and related mechanical interaction, etc., could help to reveal the unique nature of the special mineralization process. Herein, the paper provides an overview of the biomineralization process from the perspective of molecular vibrational spectroscopy, including the physicochemical properties of biomineralized tissues, from physiological to applied mineralization. These physicochemical characteristics closely to the hierarchical mineralization process include biological crystal defects, chemical bonding, atomic doping, structural changes, and content changes in organic matter, along with the interface between biocrystals and organic matter as well as the specific mechanical effects for hardness and toughness. Based on those observations, the special physiological properties of mineralization for enamel and bone, as well as the possible mechanism of pathological mineralization and calcification such as atherosclerosis, tumor micro mineralization, and urolithiasis are also reviewed and discussed. Indeed, the clearly defined physicochemical properties of mineral crystals could pave the way for studies on the mechanisms and applications.
Collapse
Affiliation(s)
- Hao Liu
- State Key Laboratory of Digital Medical EngineeringSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjingJiangsuChina
| | - Hui Jiang
- State Key Laboratory of Digital Medical EngineeringSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjingJiangsuChina
| | - Xiaohui Liu
- State Key Laboratory of Digital Medical EngineeringSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjingJiangsuChina
| | - Xuemei Wang
- State Key Laboratory of Digital Medical EngineeringSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjingJiangsuChina
| |
Collapse
|
4
|
Khurshid Z, Alfarhan MFA, Bayan Y, Mazher J, Adanir N, Dias GJ, Cooper PR, Ratnayake J. Development, physicochemical characterization and in-vitro biocompatibility study of dromedary camel dentine derived hydroxyapatite for bone repair. PeerJ 2023; 11:e15711. [PMID: 37551347 PMCID: PMC10404400 DOI: 10.7717/peerj.15711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 06/15/2023] [Indexed: 08/09/2023] Open
Abstract
This study aimed to produce hydroxyapatite from the dentine portion of camel teeth using a defatting and deproteinizing procedure and characterize its physicochemical and biocompatibility properties. Biowaste such as waste camel teeth is a valuable source of hydroxyapatite, the main inorganic constituent of human bone and teeth which is frequently used as bone grafts in the biomedical field. Fourier Transform infrared (FTIR), and micro-Raman spectroscopy confirmed the functional groups as-sociated with hydroxyapatite. X-ray diffraction (XRD) studies showed camel dentine-derived hydroxyapatite (CDHA) corresponded with hydroxyapatite spectra. Scanning electron micros-copy (SEM) demonstrated the presence of dentinal tubules measuring from 1.69-2.91 µm. The inorganic phases of CDHA were primarily constituted of calcium and phosphorus, with trace levels of sodium, magnesium, potassium, and strontium, according to energy dispersive X-ray analysis (EDX) and inductively coupled plasma mass spectrometry (ICP-MS). After 28 days of incubation in simulated body fluid (SBF), the pH of the CDHA scaffold elevated to 9.2. in-vitro biocompatibility studies showed that the CDHA enabled Saos-2 cells to proliferate and express the bone marker osteonectin after 14 days of culture. For applications such as bone augmentation and filling bone gaps, CDHA offers a promising material. However, to evaluate the clinical feasibility of the CDHA, further in-vivo studies are required.
Collapse
Affiliation(s)
- Zohaib Khurshid
- Department of Prosthodontics and Dental Implantology, College of Dentistry, King Faisal University, Al-Ahsa, Saudi Arabia
- Department of Oral Science, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | | | - Yasmin Bayan
- Department of Oral Science, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Javed Mazher
- Department of Physics, College of Science, King Faisal University, Al-Ahsa, Saudi Arabia
| | - Necdet Adanir
- Department of Restorative Dentistry, College of Dentistry, King Faisal University, Al-Ahsa, Saudi Arabia
| | - George J. Dias
- Department of Anatomy, University of Otago, Dunedin, New Zealand
| | - Paul R. Cooper
- Department of Oral Science, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Jithendra Ratnayake
- Department of Oral Science, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| |
Collapse
|
5
|
Seredin P, Goloshchapov D, Buylov N, Kashkarov V, Shikhaliev K, Potapov A, Ippolitov Y, Kartsev V, Kuyumchyan S, de Oliveira Freitas R. A Study of the Peculiarities of the Formation of a Hybrid Interface Based on Polydopamine between Dental Tissues and Dental Composites, Using IR and Raman Microspectroscopy, at the Submicron Level. Int J Mol Sci 2023; 24:11636. [PMID: 37511394 PMCID: PMC10380397 DOI: 10.3390/ijms241411636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/14/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
The creation of buffer (hybrid) layers that provide improved adhesion to two heterogeneous materials is a promising and high-priority research area in the field of dental materials science. In our work, using FTIR and Raman microspectroscopy at the submicron level in a system of dental composites/intact dental enamel, we assessed the molecular features of formation and chemically visualized the hybrid interface formed on the basis of a nature-like adhesive, polydopamine (PDA). It is shown that a homogeneous bioinspired PDA-hybrid interface with an increased content of O-Ca-O bonds can be created using traditional methods of dental tissue pretreatment (diamond micro drilling, acid etching), as well as the subsequent alkalinization procedure and the developed synthesis technology. The development of the proposed technology for accelerated deposition of PDA-hybrid layers, as well as the creation of self-assembled biomimetic nanocomposites with antibacterial properties, may in the future find clinical application for minimally invasive dental restoration procedures.
Collapse
Affiliation(s)
- Pavel Seredin
- Solid State Physics and Nanostructures Department, Voronezh State University, University Sq. 1, 394018 Voronezh, Russia
| | - Dmitry Goloshchapov
- Solid State Physics and Nanostructures Department, Voronezh State University, University Sq. 1, 394018 Voronezh, Russia
| | - Nikita Buylov
- Solid State Physics and Nanostructures Department, Voronezh State University, University Sq. 1, 394018 Voronezh, Russia
| | - Vladimir Kashkarov
- Solid State Physics and Nanostructures Department, Voronezh State University, University Sq. 1, 394018 Voronezh, Russia
| | - Khidmet Shikhaliev
- Laboratory of Organic Additives for the Processes of Chemical and Electrochemical Deposition of Metals and Alloys Used in the Electronics Industry, Voronezh State University, University Sq. 1, 394018 Voronezh, Russia
| | - Andrey Potapov
- Laboratory of Organic Additives for the Processes of Chemical and Electrochemical Deposition of Metals and Alloys Used in the Electronics Industry, Voronezh State University, University Sq. 1, 394018 Voronezh, Russia
| | - Yuri Ippolitov
- Department of Pediatric Dentistry with Orthodontia, Voronezh State Medical University, Studentcheskaya St. 11, 394006 Voronezh, Russia
| | | | - Sergey Kuyumchyan
- Saint Petersburg State University Hospital, 154, Fontanka River Embankment, 198103 St. Petersburg, Russia
| | - Raul de Oliveira Freitas
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-970, Sao Paulo, Brazil
| |
Collapse
|
6
|
Black Drum Fish Teeth: Built for Crushing Mollusk Shells. Acta Biomater 2022; 137:147-161. [PMID: 34673226 DOI: 10.1016/j.actbio.2021.10.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 10/11/2021] [Accepted: 10/13/2021] [Indexed: 12/30/2022]
Abstract
With an exclusive diet of hard-shelled mollusks, the black drum fish (Pogonias cromis) exhibits one of the highest bite forces among extant animals. Here we present a systematic microstructural, chemical, crystallographic, and mechanical analysis of the black drum teeth to understand the structural basis for achieving the molluscivorous requirements. At the material level, the outermost enameloid shows higher modulus (Er = 126.9 ± 16.3 GPa, H = 5.0 ± 1.4 GPa) than other reported fish teeth, which is attributed to the stiffening effect of Zn and F doping in apatite crystals and the preferential co-alignment of crystallographic c-axes and enameloid rods along the biting direction. The high fracture toughness (Kc = 1.12 MPa⋅m1/2) of the outer enameloid also promotes local yielding instead of fracture during crushing contact with mollusk shells. At the individual-tooth scale, the molar-like teeth, high density of dentin tubules, enlarged pulp chamber, and specialized dentin-bone connection, all contribute to the functional requirements, including confinement of contact compressive stress in the stiff enameloid, enhanced energy absorption in the compliant dentin, and controlled failure of tooth-bone composite under excessive loads. These results show that the multi-scale structures of black drum teeth are adapted to feed on hard-shelled mollusks. STATEMENT OF SIGNIFICANCE: The black drum fish feeds on hard-shelled mollusks, which requires strong, tough, and wear-resistant teeth. This study presents a comprehensive multiscale material and mechanical analysis of the black drum teeth in achieving such remarkable biological function. At microscale, the fluoride- and zinc-doped apatite crystallites in the outer enameloid region are aligned perpendicular to the chewing surface, representing one of the stiffest biomineralized materials found in nature. In the inner enameloid region, the apatite crystals are arranged into intertwisted rods with crystallographic misorientation for increased crack resistance and toughness. At the macroscale, the molariform geometry, the two-layer design based on the outer enameloid and inner dentin, enlarged pulp chamber and the underlying strong bony toothplate work synergistically to contribute to the teeth's crushing resistance.
Collapse
|
7
|
Seredin P, Goloshchapov D, Ippolitov Y, Vongsvivut J. Development of a new approach to diagnosis of the early fluorosis forms by means of FTIR and Raman microspectroscopy. Sci Rep 2020; 10:20891. [PMID: 33262412 PMCID: PMC7708976 DOI: 10.1038/s41598-020-78078-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 11/20/2020] [Indexed: 11/09/2022] Open
Abstract
This study is aimed at investigating the features of mineralization of the enamel apatite at initial stages of fluorosis development. Samples of teeth with intact and fluorotic enamel in an early stage of the disease development (Thylstrup-Fejerskov Index = 1-3) were studied by Raman scattering and FTIR using Infrared Microspectroscopy beamline at Australian Synchrotron equipment. Based on the data obtained by optical microspectroscopy and calculation of the coefficient R [A-type/B-type], which represents the ratio of carbonation fraction of CO32-, replacing phosphate or hydroxyl radicals in the enamel apatite lattice, the features of mineralization of enamel apatite in the initial stages of development of the pathology caused by an increased content of fluorine in the oral cavity were established. Statistical analysis of the data showed significant differences in the mean values of R [A-type/B-type] ratio between the control and experimental groups for surface layers (p < 0.01). The data obtained are potentially significant as benchmarks in the development of a new approach to preventive diagnostics of the development of initial and clinically unregistered stages of human teeth fluorosis, as well as personalized control of the use of fluoride-containing caries-preventive agents.
Collapse
Affiliation(s)
- Pavel Seredin
- Department of Solid State Physics and Nanostructures, Voronezh State University, University Sq. 1, Voronezh, Russia, 394018.
- Ural Federal University, 19 Mira Street, Ekaterinburg, Russia, 620002.
| | - Dmitry Goloshchapov
- Department of Solid State Physics and Nanostructures, Voronezh State University, University Sq. 1, Voronezh, Russia, 394018
| | - Yuri Ippolitov
- Department of Pediatric Dentistry With Orthodontia, Voronezh State Medical University, Studentcheskaya St. 11, Voronezh, Russia, 394006
| | - Jitraporn Vongsvivut
- Australian Synchrotron (Synchrotron Light Source Australia Pty LTD), 800 Blackburn Rd, Clayton, VIC, 3168, Australia
| |
Collapse
|
8
|
Pessanha S, Silva S, Silveira JM, Otel I, Luis H, Manteigas V, Jesus AP, Mata A, Fonseca M. Evaluation of the effect of fluorinated tooth bleaching products using polarized Raman microscopy and particle induced gamma-ray emission. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 236:118378. [PMID: 32330822 DOI: 10.1016/j.saa.2020.118378] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 04/09/2020] [Accepted: 04/14/2020] [Indexed: 06/11/2023]
Abstract
In this in vitro study, the effect of the application of tooth bleaching products in human enamel was evaluated using polarized Raman microscopy, particle induced gamma-ray emission (PIGE) and Vickers Hardness test. Due to their acidic nature, teeth whitening products are associated with changes in enamel mineralization. Consequently, products have appeared in the market that promote the incorporation of fluorine in order to decrease the solubility of the hydroxyapatite in enamel and prevent demineralization. This way, four commercial products with different active principle concentrations: 16% carbamide peroxide (Opalescence PF® and VivaStyle®) or 6% hydrogen peroxide (Opalescence Go PF® and VivaStyle Paint On®) and presence or not of fluorine were compared. The information on the crystalline state of the enamel was provided by the determination of the depolarization ratio of the symmetric stretching band of phosphate (at 959 cm-1). Furthermore, the content and uptake of F was evaluated using PIGE in the two fluorinated products as well as in one negative control group. In order to evaluate the microhardness of enamel by means of Vickers test, another group of polished samples was prepared (using Opalescence PF®) and evaluated. Conversely to what could be expected, the obtained results determined a statistically significant decrease of depolarization ratio, leading to an increase of mineralization after the application of the bleaching products, except for VivaStyle®. For this group, no significant variation was obtained before-after treatment, most likely due to the acidity of the product (pH = 5.8). Additionally, an increase of concentration of F in the dental tissues was determined for the fluorinated products. On the other hand, enamel polishing, required for the application of the Vickers test, led to increased susceptibility to erosion, resulting in decreased hardness and an increased enamel depolarization ratio.
Collapse
Affiliation(s)
- S Pessanha
- Laboratório de Instrumentação, Engenharia Biomédica e Física das Radiações, Campus Caparica, 2829-516 Caparica, Portugal; Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus Caparica, 2829-516 Caparica, Portugal.
| | - S Silva
- Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus Caparica, 2829-516 Caparica, Portugal
| | - J M Silveira
- Laboratório de Instrumentação, Engenharia Biomédica e Física das Radiações, Campus Caparica, 2829-516 Caparica, Portugal; Faculdade de Medicina Dentária, Universidade de Lisboa, R. Prof. Teresa Ambrósio, Cidade Universitária, 1600-277 Lisboa, Portugal
| | - I Otel
- Laboratório de Instrumentação, Engenharia Biomédica e Física das Radiações, Campus Caparica, 2829-516 Caparica, Portugal; Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus Caparica, 2829-516 Caparica, Portugal
| | - H Luis
- Instituto Superior Técnico, Campus Tecnológico e Nuclear, Universidade Técnica de Lisboa, Estrada Nacional 10, 2686-953 Sacavém, Portugal
| | - V Manteigas
- Laboratório de Instrumentação, Engenharia Biomédica e Física das Radiações, Campus Caparica, 2829-516 Caparica, Portugal; Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus Caparica, 2829-516 Caparica, Portugal
| | - A P Jesus
- Laboratório de Instrumentação, Engenharia Biomédica e Física das Radiações, Campus Caparica, 2829-516 Caparica, Portugal; Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus Caparica, 2829-516 Caparica, Portugal
| | - A Mata
- Laboratório de Instrumentação, Engenharia Biomédica e Física das Radiações, Campus Caparica, 2829-516 Caparica, Portugal; Faculdade de Medicina Dentária, Universidade de Lisboa, R. Prof. Teresa Ambrósio, Cidade Universitária, 1600-277 Lisboa, Portugal
| | - M Fonseca
- Laboratório de Instrumentação, Engenharia Biomédica e Física das Radiações, Campus Caparica, 2829-516 Caparica, Portugal; Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus Caparica, 2829-516 Caparica, Portugal; Universidade Europeia, IADE, Av. Carlos I, 4, 1200-049 Lisboa, Portugal
| |
Collapse
|
9
|
Deep eutectic choline chloride-calcium chloride as all-in-one system for sustainable and one-step synthesis of bioactive fluorapatite nanoparticles. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2017.10.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
10
|
Nevatte RJ, Wueringer BE, Jacob DE, Park JM, Williamson JE. First insights into the function of the sawshark rostrum through examination of rostral tooth microwear. JOURNAL OF FISH BIOLOGY 2017; 91:1582-1602. [PMID: 29034467 DOI: 10.1111/jfb.13467] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 08/17/2017] [Indexed: 06/07/2023]
Abstract
Potential roles of the rostrum of sawsharks (Pristiophoridae), including predation and self-defence, were assessed through a variety of inferential methods. Comparison of microwear on the surface of the rostral teeth of sawsharks and sawfishes (Pristidae) show that microwear patterns are alike and suggest that the elongate rostra in these two elasmobranch families are used for a similar purpose (predation). Raman spectroscopy indicates that the rostral teeth of both sawsharks and sawfishes are composed of hydroxyapatite, but differ in their collagen content. Sawfishes possess collagen throughout their rostral teeth whereas collagen is present only in the centre of the rostral teeth of sawsharks, which may relate to differences in ecological use. The ratio of rostrum length to total length in the common sawshark Pristiophorus cirratus was found to be similar to the largetooth sawfish Pristis pristis but not the knifetooth sawfish Anoxypristis cuspidata. Analysis of the stomach contents of P. cirratus indicates that the diet consists of demersal fishes and crustaceans, with shrimp from the family Pandalidae being the most important dietary component. No prey item showed evidence of wounds inflicted by the rostral teeth. In light of the similarities in microwear patterns, rostral tooth chemistry and diet with sawfishes, it is hypothesised that sawsharks use their rostrum in a similar manner for predation (sensing and capturing prey) and possibly for self-defence.
Collapse
Affiliation(s)
- R J Nevatte
- Department of Biological Sciences, Macquarie University, New South Wales 2109, Australia
| | - B E Wueringer
- College of Marine and Environmental Sciences, James Cook University, P. O. Box 6811, Cairns, Queensland 4870, Australia
- Sharks and Rays Australia, P. O. Box 575, Bungalow, Queensland, 4870, Australia
| | - D E Jacob
- Department of Earth and Planetary Sciences, Macquarie University, New South Wales 2109, Australia
| | - J M Park
- Department of Biological Sciences, Macquarie University, New South Wales 2109, Australia
| | - J E Williamson
- Department of Biological Sciences, Macquarie University, New South Wales 2109, Australia
| |
Collapse
|
11
|
Ranjkesh B, Chevallier J, Salehi H, Cuisinier F, Isidor F, Løvschall H. Apatite precipitation on a novel fast-setting calcium silicate cement containing fluoride. ACTA BIOMATERIALIA ODONTOLOGICA SCANDINAVICA 2016; 2:68-78. [PMID: 27335901 PMCID: PMC4894078 DOI: 10.1080/23337931.2016.1178583] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Accepted: 04/11/2016] [Indexed: 12/01/2022]
Abstract
Aim: Calcium silicate cements are widely used in endodontics. Novel fast-setting calcium silicate cement with fluoride (Protooth) has been developed for potential applications in teeth crowns including cavity lining and cementation. Objective: To evaluate the surface apatite-forming ability of Protooth compositions as a function of fluoride content and immersion time in phosphate-buffered saline (PBS). Material and methods: Three cement compositions were tested: Protooth (3.5% fluoride and 10% radiocontrast), ultrafast Protooth (3.5% fluoride and 20% radiocontrast), and high fluoride Protooth (15% fluoride and 25% radiocontrast). Powders were cap-mixed with liquid, filled to the molds and immersed in PBS. Scanning electron microscopy, energy dispersive X-ray analysis, and Raman spectroscopy were used to characterize the precipitations morphology and composition after 1, 7, 28, and 56 days. Apatite/belite Raman peak height indicated the apatite thickness. Results: Spherical calcium phosphate precipitations with acicular crystallites were formed after 1-day immersion in PBS and Raman spectra disclosed the phosphate band at 965 cm−1, supporting the apatite formation over Protooth compositions. The apatite deposition continued and more voluminous precipitations were observed after 56 days over the surface of all cements. Raman bands suggested the formation of β-type carbonated apatite over Protooth compositions. High fluoride Protooth showed the most compact deposition with significantly higher apatite/belite ratio compared to Protooth and ultrafast Protooth after 28 and 56 days. Conclusions: Calcium phosphate precipitations (apatite) were formed over Protooth compositions after immersion in PBS with increasing apatite formation as a function of time. High fluoride Protooth exhibited thicker apatite deposition.
Collapse
Affiliation(s)
- Bahram Ranjkesh
- Department of Dentistry Health, Aarhus University , Aarhus C , Denmark
| | - Jacques Chevallier
- Department of Physics and Astronomy, Aarhus University , Aarhus C , Denmark
| | - Hamideh Salehi
- Bioengineering and Nanoscience Laboratory, UFR d'Odontologie, Université Montpellier 1 , Montpellier , France
| | - Frédéric Cuisinier
- Bioengineering and Nanoscience Laboratory, UFR d'Odontologie, Université Montpellier 1 , Montpellier , France
| | - Flemming Isidor
- Department of Dentistry Health, Aarhus University , Aarhus C , Denmark
| | - Henrik Løvschall
- Department of Dentistry Health, Aarhus University , Aarhus C , Denmark
| |
Collapse
|
12
|
Arthur RA, Martins VB, de Oliveira CL, Leitune VCB, Collares FM, Magalhães AC, Maltz M. Effect of over-the-counter fluoridated products regimens on root caries inhibition. Arch Oral Biol 2015; 60:1588-94. [DOI: 10.1016/j.archoralbio.2015.07.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 06/28/2015] [Accepted: 07/26/2015] [Indexed: 11/15/2022]
|
13
|
Lee BS, Chou PH, Chen SY, Liao HY, Chang CC. Prevention of enamel demineralization with a novel fluoride strip: enamel surface composition and depth profile. Sci Rep 2015; 5:13352. [PMID: 26293361 PMCID: PMC4543969 DOI: 10.1038/srep13352] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 07/21/2015] [Indexed: 11/10/2022] Open
Abstract
There is no topically applicable low concentration fluoride delivery device available for caries prevention. This study was aimed to assess the use of a low concentration (1450 ppm) fluoride strip as an effective fluoride delivery system against enamel demineralization. The enamel surface composition and calcium-deficient hydroxyapatite or toothpaste treatments were investigated using X-ray photoelectron spectroscopy. In vitro enamel demineralization was assayed using a pH cycling model and the dissolution of calcium ions from the treated specimens was quantified using ion chromatography. After 24-hr fluoride-strip treatment, the enamel was covered with a CaF2 layer which showed a granular morphology of 1 μm in size. Below the CaF2 layer was a region of mixed fluorapatite and CaF2. Fluoride infiltrated extensively in enamel to produce highly fluorinated fluorohydroxyapatite. In comparison, low-fluoride-level fluorinated fluorohydroxyapatite was formed on the enamel specimen exposed to toothpaste. The treatments with the fluoride strip as short as 1 hr significantly inhibited enamel demineralization. The fluoride strip was effective for topical fluoride delivery and inhibited in vitro demineralization of enamel by forming CaF2 and fluoride-containing apatites at the enamel surface. It exhibited the potential as an effective fluoride delivery device for general use in prevention of caries.
Collapse
Affiliation(s)
- Bor-Shiunn Lee
- Graduate Institute of Oral Biology, School of Dentistry, National Taiwan University and National Taiwan University Hospital, No.1, Changde St., Jhongjheng District, Taipei 100, Taiwan
| | - Po-Hung Chou
- Graduate Institute of Oral Biology, School of Dentistry, National Taiwan University and National Taiwan University Hospital, No.1, Changde St., Jhongjheng District, Taipei 100, Taiwan
| | - Shu-Yu Chen
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Hua-Yang Liao
- Research Center for Applied Sciences, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei 11529, Taiwan
| | - Che-Chen Chang
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
| |
Collapse
|
14
|
Carvalho FBD, Barbosa AFS, Zanin FAA, Brugnera Júnior A, Silveira Júnior L, Pinheiro ALB. Use of laser fluorescence in dental caries diagnosis: a fluorescence x biomolecular vibrational spectroscopic comparative study. Braz Dent J 2014; 24:59-63. [PMID: 23657415 DOI: 10.1590/0103-6440201302123] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Accepted: 12/04/2012] [Indexed: 11/22/2022] Open
Abstract
The aim of this work was to verify the existence of correlation between Raman spectroscopy readings of phosphate apatite (~960 cm-1), fluoridated apatite (~575 cm-1) and organic matrix (~1450 cm-1) levels and Diagnodent® readings at different stages of dental caries in extracted human teeth. The mean peak value of fluorescence in the carious area was recorded and teeth were divided in enamel caries, dentin caries and sound dental structure. After fluorescence readings, Raman spectroscopy was carried out on the same sites. The results showed significant difference (ANOVA, p<0.05) between the fluorescence readings for enamel (16.4 ± 2.3) and dentin (57.6 ± 23.7) on carious teeth. Raman peaks of enamel and dentin revealed that ~575 and ~960 cm-1 peaks were more intense in enamel caries. There was significant negative correlation (p<0.05) between the ~575 and ~960 cm-1 peaks and dentin caries. It may be concluded that the higher the fluorescence detected by Diagnodent the lower the peaks of phosphate apatite and fluoridated apatite. As the early diagnosis of caries is directly related to the identification of changes in the inorganic tooth components, Raman spectroscopy was more sensitive to variations of these components than Diagnodent.
Collapse
|
15
|
Ciobotă V, Salama W, Vargas Jentzsch P, Tarcea N, Rösch P, El Kammar A, Morsy RS, Popp J. Raman investigations of Upper Cretaceous phosphorite and black shale from Safaga District, Red Sea, Egypt. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 118:42-47. [PMID: 24036306 DOI: 10.1016/j.saa.2013.08.059] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Revised: 08/06/2013] [Accepted: 08/14/2013] [Indexed: 06/02/2023]
Abstract
The mineral composition of the Upper Cretaceous Duwi phosphorite deposits and underlying Quseir Variegated Shale from Safaga district, Red Sea Range, Egypt, was investigated by dispersive and Fourier transformed Raman spectroscopy. The only phosphorous containing mineral detected in the phosphorite deposits was carbonate fluorapatite. Often carbonate fluorapatite appears associated with calcium sulfate and seldom with calcium carbonate in the investigated samples. Iron is present in the form of goethite and pyrite in the phosphorite layer, while pyrite, marcasite and hematite were identified in the Quseir Shale samples. Also, a high amount of disordered carbon was detected in the black shale layers. The Raman results confirm the hypothesis that the formation of the phosphorites took place in a marine environment. During the formation of black shale, the redox conditions changed, with the pH reaching values of 4 or even lower. Diagenetic and weathering transformations had taken place in the phosphorite deposits, calcium sulfate and goethite being products of these types of processes.
Collapse
Affiliation(s)
- Valerian Ciobotă
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Germany
| | | | | | | | | | | | | | | |
Collapse
|
16
|
De Carvalho Filho ACB, Sanches RP, Martin AA, Do Espírito Santo AM, Soares LES. Energy dispersive X-ray spectrometry study of the protective effects of fluoride varnish and gel on enamel erosion. Microsc Res Tech 2010; 74:839-44. [DOI: 10.1002/jemt.20966] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2010] [Revised: 09/24/2010] [Accepted: 10/07/2010] [Indexed: 11/05/2022]
|