1
|
Majeed R, Elnawawy HM, Kutty MG, Yahya NA, Azami NH, Abu Kasim NH, Nabhan MS, Cooper PR, Camilleri J, Ahmed HMA. Physicochemical, mechanical and biological properties of nano-calcium silicate-based cements: a systematic review. Odontology 2023; 111:759-776. [PMID: 36864211 DOI: 10.1007/s10266-023-00786-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 01/17/2023] [Indexed: 03/04/2023]
Abstract
This systematic review evaluated the effects of nano-sized cement particles on the properties of calcium silicate-based cements (CSCs). Using defined keywords, a literature search was conducted to identify studies that investigated properties of nano-calcium silicate-based cements (NCSCs). A total of 17 studies fulfilled the inclusion criteria. Results indicated that NCSC formulations have favourable physical (setting time, pH and solubility), mechanical (push out bond strength, compressive strength and indentation hardness) and biological (bone regeneration and foreign body reaction) properties compared with commonly used CSCs. However, the characterization and verification for the nano-particle size of NCSCs were deficient in some studies. Furthermore, the nanosizing was not limited to the cement particles and a number of additives were present. In conclusion, the evidence available for the properties of CSC particles in the nano-range is deficient-such properties could be a result of additives which may have enhanced the properties of the material.
Collapse
Affiliation(s)
- Rabia Majeed
- Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Hoda Mohamed Elnawawy
- Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Muralithran Govindan Kutty
- Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Noor Azlin Yahya
- Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Noor Hayati Azami
- Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Noor Hayaty Abu Kasim
- Faculty of Dentistry, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300, Kuala Lumpur, Malaysia
| | - Mohamed Shady Nabhan
- Department of Removable Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
| | - Paul Roy Cooper
- Department of Oral Sciences, University of Otago, Otago, New Zealand
| | - Josette Camilleri
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Hany Mohamed Aly Ahmed
- Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, 50603, Kuala Lumpur, Malaysia.
| |
Collapse
|
2
|
Padrón-Alvarado K, García-Mendoza LA, Ramírez-Ortega JP, Rodríguez-Chavéz JA, Moyaho-Bernal MDLA, Arreguín-Cano JA, Hoz-Rodríguez LA, Wintergerst A, Arenas-Alatorre JA, Flores-Ledesma A. Cell viability and physicochemical effects of different concentrations of bismuth trioxide in a mineral trioxide aggregate cement. J Oral Sci 2023; 65:10-14. [PMID: 36529511 DOI: 10.2334/josnusd.22-0139] [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: 12/23/2022]
Abstract
PURPOSE To evaluate the effect of three concentrations of bismuth trioxide (Bi2O3) on the biological and physicochemical properties of an experimental mineral trioxide aggregate-type (MTA-type) cement at different time points. METHODS Three experimental groups with white Portland cement containing 15, 20, or 25 wt% of Bi2O3 were assessed. Cellular proliferation in human periodontal ligament fibroblasts was evaluated with an MTT assay. Radiopacity, dimensional stability, pH, and compressive strength were evaluated at different time points. RESULTS Bismuth trioxide induced cell proliferation in the Bi15 and Bi25 groups in a time-dependent manner; pH was similar in all groups. Compressive strength was associated with time and bismuth concentration. Bi25 had significantly contracted at day 7 and expanded at day 14 (ANOVA P < 0.05, post hoc Tukey test P < 0.05). CONCLUSION A higher Bi2O3 concentration had a negative effect on the physical properties of the cement at all time points.
Collapse
Affiliation(s)
- Karla Padrón-Alvarado
- Dental Materials and Biomaterials Research Laboratory, Postgraduate Studies and Research Division, Faculty of Dentistry, National Autonomous University of México
| | - Laura A García-Mendoza
- Dental Materials and Biomaterials Research Laboratory, Postgraduate Studies and Research Division, Faculty of Dentistry, National Autonomous University of México
| | - Juana P Ramírez-Ortega
- Dental Materials and Biomaterials Research Laboratory, Postgraduate Studies and Research Division, Faculty of Dentistry, National Autonomous University of México
| | | | - María D L A Moyaho-Bernal
- Dental Materials and Biomaterials Laboratory Faculty of Stomatology, Meritorious Autonomous University of Puebla
| | | | - Lia A Hoz-Rodríguez
- Periodontal Biology and Mineralized Tissue Laboratory, Postgraduate Studies and Research Division, School of Dentistry, National Autonomous University of México
| | - Ana Wintergerst
- Division of Postgraduate Studies and Research, School of Dentistry, National Autonomous University of México
| | - Jesús A Arenas-Alatorre
- Central Microscopy Laboratory, Institute of Physics, National Autonomous University of México
| | - Abigailt Flores-Ledesma
- Dental Materials and Biomaterials Laboratory Faculty of Stomatology, Meritorious Autonomous University of Puebla
| |
Collapse
|
3
|
Guneser MB, Ozturk TY, Sahin AND, Uysal BA, Eldeniz AU. Effect of nanosized bioactive glass addition on some physical properties of biodentine. J Appl Biomater Funct Mater 2023; 21:22808000231184059. [PMID: 37680087 DOI: 10.1177/22808000231184059] [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: 09/09/2023] Open
Abstract
The aim of this in vitro study was to investigate some physical properties of Biodentine (BD) (Septodont, France) that has been modified by adding nanosized bioactive glass (nBG) particles to it in different ratios. The cement was modified by adding 1% (7 mg) and 2% (14 mg) nBG powder to BD. BD was used as the control group in its commercial form. A total of 240 cement samples (n = 80) were prepared according to the standard measurements for each test. Subsequently, tests to determine compressive strength, microhardness, initial setting time, and solubility of the samples were performed. The obtained data were statistically analyzed using one-way ANOVA and Tukey's HDS tests, and the significance level was found to be 0.05. The compressive strength values of the samples modified with 1% and 2% nBG were higher than those of the unmodified BD; however, no statistically significant difference was found between them [BD + nBG (2 wt%) ⩾ BD+nBG (1 wt%) ⩾ control BD], (p > 0.05). The microhardness values of the samples modified with 1% and 2% nBG were found to be significantly higher than those of the control group [BD + nBG (2 wt%) > BD+nBG (1 wt%) > control BD], p < 0.05. Initial setting times were determined as 14 min for unmodified BD, 13 min for BD + nBG (1 wt%), and 12 min for BD + nBG (2 wt%). The addition of nBG to BD significantly reduced the initial setting time of BD (p < 0.05). A significant decrease was observed in the solubility of the BD modified with nBG samples compared to that of the control group [control BD > BD+nBG (1 wt%) >BD+nBG (2 wt%)], p < 0.05. Within the limitations of this study, it was found that the addition of certain amounts of nBG to BD positively affected some physical properties of the cement. Future in vitro and in vivo studies should be performed to prove the clinical applicability of the cements used in this study.
Collapse
Affiliation(s)
- Mehmet Burak Guneser
- Department of Endodontics, Faculty of Dentistry, Bezmialem Vakif University, Istanbul, Turkey
| | | | | | - Betul Aycan Uysal
- Department of Endodontics, Faculty of Dentistry, Bezmialem Vakif University, Istanbul, Turkey
| | - Ayce Unverdi Eldeniz
- Department of Endodontics, Faculty of Dentistry, Selcuk University, Konya, Turkey
| |
Collapse
|
4
|
Bilvinaite G, Drukteinis S, Brukiene V, Rajasekharan S. Immediate and Long-Term Radiopacity and Surface Morphology of Hydraulic Calcium Silicate-Based Materials. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6635. [PMID: 36233978 PMCID: PMC9572346 DOI: 10.3390/ma15196635] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 09/22/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
The present study aimed to evaluate and compare the radiopacity and surface morphology of AH Plus Bioceramic Sealer (AHPB), Bio-C Sealer (BIOC), Biodentine (BD), BioRoot RCS (BR), Grey-MTAFlow (GMF), White-MTAFlow (WMF), TotalFill BC Sealer (TF), and TotalFill BC Sealer HiFlow (TFHF) at different time moments—30 min, 24 h, and 28 days. Ten specimens of each material were prepared according to the ISO-6876:2012 standard and radiographed next to an aluminum step wedge using a digital sensor. The specimens were stored in a gelatinized Hank’s balanced salt solution at 37 °C between assessments. The mean grayscale values of each specimen were converted into equivalent aluminum thickness by a linear regression model. Characterization of the surface morphology was performed by using a scanning electron microscope at ×4.0k and ×10.0k magnifications. The radiographic analysis revealed that all the tested materials exceeded the ISO-specified limit of 3 mm Al, with the highest radiopacity presented by AHPB and the lowest by BD. None of the tested materials demonstrated considerable variances between the 30 min and the 24 h radiopacity level (p < 0.05), and statistically significant long-term radiopacity changes were exhibited by BR, TFHF, and TF (p > 0.05). All the specimens demonstrated a common feature of limited precipitate formation, with numerous unreacted particles still presented on the surface after 24 h, whereas the particle rearrangement and the deposition of precipitates were clearly observed after 28 days.
Collapse
Affiliation(s)
- Goda Bilvinaite
- Institute of Dentistry, Faculty of Medicine, Vilnius University, Zalgirio 115, LT-08217 Vilnius, Lithuania
| | - Saulius Drukteinis
- Institute of Dentistry, Faculty of Medicine, Vilnius University, Zalgirio 115, LT-08217 Vilnius, Lithuania
| | - Vilma Brukiene
- Institute of Dentistry, Faculty of Medicine, Vilnius University, Zalgirio 115, LT-08217 Vilnius, Lithuania
| | - Sivaprakash Rajasekharan
- Department of Paediatric Dentistry, School of Oral Health Sciences, Ghent University, B-9000 Ghent, Belgium
| |
Collapse
|
5
|
Recent Progress on the Applications of Nanomaterials and Nano-Characterization Techniques in Endodontics: A Review. MATERIALS 2022; 15:ma15155109. [PMID: 35897542 PMCID: PMC9331596 DOI: 10.3390/ma15155109] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 07/19/2022] [Accepted: 07/20/2022] [Indexed: 02/06/2023]
Abstract
The impact of nano-based technologies in endodontics for the identification and treatment of various dental infections is showing fast progress. Studies show that nanoparticles could serve as useful agents with many beneficial results and continue to be promising in the field of endodontics. To ensure progress and improvements on novel nanomaterials in relation to their physicochemical and biological properties, nano-identification methods for the detection and evaluation of diseases need to be further highlighted. This study aims to review the current technological progress and recent research outcomes as well as possible prospective applications of nano-based technologies in endodontics. A comprehensive literature survey has been carried out on the utilizations of nanomaterials and nano-characterization techniques in endodontics. The current status and recent applications in endodontics are discussed with illustrative examples. The results have shown that the progress and improved accuracy of nano-identification techniques enabled a better characterization, evaluation and selection of appropriate treatment plans for endodontics-related diseases. The results have been inspiring for further clinical investigations. Nano-endodontics is still a developing field with a strong potential for revolutions of novel materials and techniques in the diagnosis and treatment of dental diseases. Further improvements in nanoparticles properties will pave the way for the development of many beneficial endodontic therapeutic agents. The future looks encouraging for sustainable products and testing methods for clinical endodontic applications.
Collapse
|
6
|
Evaluation of Mechanical Activation and Chemical Synthesis for Particle Size Modification of White Mineral Trioxide Aggregate. Eur Endod J 2020; 5:128-133. [PMID: 32766523 PMCID: PMC7398986 DOI: 10.14744/eej.2020.84803] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 04/06/2020] [Indexed: 11/20/2022] Open
Abstract
Objective Initial setting time is one of the most important properties of calcium silicate cements (CSCs) such as white mineral trioxide aggregate (WMTA). This study aimed to evaluate the effect of two methods used to reduce the particle size of WMTA, mechanical activation and chemical synthesis. Methods WMTA without bismuth oxide (WMTA-B) was provided and divided into four groups (n=5) including: WMTA-B, WMTA-B+10 min milling, WMTA-B+30 min milling, and sol-gel. In groups 2 and 3, the milling was performed by using tungsten carbide balls in a ratio 1:15 (w/w) and a vibration frequency of 30 Hz together with absolute ethanol. For the fourth group, polyethylene glycol (PEG), calcium acetate (Ca(C2H3O2)2), SiO2, and aluminum oxide (Al2O3) were used for the sol-gel process. After preparation, sample powders were mixed with distilled water and placed in cylindrical molds, covered with water-moistened gauze, and incubated at 37°C for 24 hours. The Vicat needle test analyzed the initial setting time. Data were analyzed by ANOVA and Tukey tests at a significance level of P<0.05. The correlation between particle size and setting time was determined. Results Initial setting time of the sol-gel and WMTA-B+30 min milling was significantly lower than in the other two groups (P<0.05). A significant correlation was noticed between particle size and initial setting time (P<0.05). Conclusion Sol-gel process introduces a promising alternative strategy for the reduction of initial setting time of CSC materials. While both methods increased surface area, mechanical activation was not as successful in reducing surface area and initial setting time as effectively as the sol-gel process.
Collapse
|
7
|
Paula A, Carrilho E, Laranjo M, Abrantes AM, Casalta-Lopes J, Botelho MF, Marto CM, Ferreira MM. Direct Pulp Capping: Which is the Most Effective Biomaterial? A Retrospective Clinical Study. MATERIALS 2019; 12:ma12203382. [PMID: 31623190 PMCID: PMC6829284 DOI: 10.3390/ma12203382] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 10/05/2019] [Accepted: 10/14/2019] [Indexed: 12/20/2022]
Abstract
(1) Background: Recently, tricalcium silicate cements, such as Biodentine™, have emerged. This biomaterial has a calcium hydroxide base and characteristics like mineral aggregate trioxide cements, but has tightening times that are substantially more suitable for their application and other clinical advantages. (2) Methods: A retrospective clinical study was conducted with 20 patients, which included a clinical evaluation of the presence or absence of pulp inflammation compatible symptoms, radiographic evaluation of the periapical tissues, and structural alterations of the coronary restoration that supports pulp capping therapies with Biodentine™ and WhiteProRoot®MTA. (3) Results: This clinical study revealed similar success rates between mineral trioxide cement and tricalcium silicates cements at 6 months, with 100% and 95% success rates, respectively. There were no statistically significant differences between both biomaterials and between these and the various clinical circumstances, namely the absolute isolation of the operating field, exposure size, the aetiology of exposure, and even the type of restorative material used. (4) Conclusions: Biodentine™ demonstrated a therapeutic effect on the formation of a dentin bridge accompanied by slight inflammatory signs, with a high clinical success rate, indicating the possibility of its effective and safe use in dental pulp direct capping in humans, similar to the gold standard material.
Collapse
Affiliation(s)
- Anabela Paula
- Institute of Integrated Clinical Practice, Institute for Clinical and Biomedical Research (iCBR), Centre for Innovative Biomedicine and Biotechnology (CIBB), Area of Environment Genetics and Oncobiology (CIMAGO), CNC.IBILI, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal.
| | - Eunice Carrilho
- Institute of Integrated Clinical Practice, Institute for Clinical and Biomedical Research (iCBR), Centre for Innovative Biomedicine and Biotechnology (CIBB), Area of Environment Genetics and Oncobiology (CIMAGO), CNC.IBILI, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal.
| | - Mafalda Laranjo
- Biophysics Institute, Institute for Clinical and Biomedical Research (iCBR), Centre for Innovative Biomedicine and Biotechnology (CIBB), Area of Environment Genetics and Oncobiology (CIMAGO), CNC.IBILI Consortium, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal.
| | - Ana M Abrantes
- Biophysics Institute, Institute for Clinical and Biomedical Research (iCBR), Centre for Innovative Biomedicine and Biotechnology (CIBB), Area of Environment Genetics and Oncobiology (CIMAGO), CNC.IBILI Consortium, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal.
| | - João Casalta-Lopes
- Biophysics Institute, Institute for Clinical and Biomedical Research (iCBR), Centre for Innovative Biomedicine and Biotechnology (CIBB), Area of Environment Genetics and Oncobiology (CIMAGO), CNC.IBILI Consortium, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal.
- Radiation Oncology Department, Coimbra University Hospital Centre, 3000-548 Coimbra, Portugal.
| | - Maria Filomena Botelho
- Biophysics Institute, Institute for Clinical and Biomedical Research (iCBR), Centre for Innovative Biomedicine and Biotechnology (CIBB), Area of Environment Genetics and Oncobiology (CIMAGO), CNC.IBILI Consortium, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal.
| | - Carlos Miguel Marto
- Institute of Experimental Pathology, Institute for Clinical and Biomedical Research (iCBR), Centre for Innovative Biomedicine and Biotechnology (CIBB), Area of Environment Genetics and Oncobiology (CIMAGO), CNC.IBILI, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal.
| | - Manuel M Ferreira
- Institute of Endodontics, Institute for Clinical and Biomedical Research (iCBR), Centre for Innovative Biomedicine and Biotechnology (CIBB), Area of Environment Genetics and Oncobiology (CIMAGO), CNC.IBILI, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal.
| |
Collapse
|
8
|
Estrela C, Decurcio DDA, Rossi-Fedele G, Silva JA, Guedes OA, Borges ÁH. Root perforations: a review of diagnosis, prognosis and materials. Braz Oral Res 2018; 32:e73. [DOI: 10.1590/1807-3107bor-2018.vol32.0073] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 06/06/2018] [Indexed: 11/22/2022] Open
|
9
|
SAGHIRI MA, ORANGI J, ASATOURIAN A, GUTMANN JL, Garcia-Godoy F, LOTFI M, SHEIBANI N. Calcium silicate-based cements and functional impacts of various constituents. Dent Mater J 2017; 36:8-18. [PMID: 27773894 PMCID: PMC5293667 DOI: 10.4012/dmj.2015-425] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Calcium silicate-based cements have superior sealing ability, bioactivity, and marginal adaptation, which make them suitable for different dental treatment applications. However, they exhibit some drawbacks such as long setting time and poor handling characteristics. To overcome these limitations calcium silicates are engineered with various constituents to improve specific characteristics of the base material, and are the focus of this review. An electronic search of the PubMed, MEDLINE, and EMBASE via OVID databases using appropriate terms and keywords related to the use, application, and properties of calcium silicate-based cements was conducted. Two independent reviewers obtained and analyzed the full texts of the selected articles. Although the effects of various constituents and additives to the base Portland cement-like materials have been investigated, there is no one particular ingredient that stands out as being most important. Applying nanotechnology and new synthesis methods for powders most positively affected the cement properties.
Collapse
Affiliation(s)
- Mohammad Ali SAGHIRI
- Department of Ophthalmology and Visual Sciences, and McPherson Eye Research Institute, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Jafar ORANGI
- Department of Materials Science and Engineering, Auburn University, Auburn, AL, USA
- Sector of Angiogenesis and Regenerative Surgery, Dr. H Afsar Lajevardi Cluster, Shiraz, Iran
| | - Armen ASATOURIAN
- Sector of Angiogenesis and Regenerative Surgery, Dr. H Afsar Lajevardi Cluster, Shiraz, Iran
| | - James L. GUTMANN
- Department of Restorative Sciences, Texas A&M University College of Dentistry, Dallas, TX, USA
| | - Franklin Garcia-Godoy
- Bioscience Research Center, Health Science Center, College of Dentistry, University of Tennessee, Memphis, TN, USA
| | - Mehrdad LOTFI
- Sector of Angiogenesis and Regenerative Surgery, Dr. H Afsar Lajevardi Cluster, Shiraz, Iran
- Research Center for Pharmaceutical Nanotechnology and Department of Endodontics, Dental Faculty, Tabriz University (Medical Sciences), Tabriz, Iran
| | - Nader SHEIBANI
- Department of Ophthalmology and Visual Sciences, Biomedical Engineering, and McPherson Eye Research Institute, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| |
Collapse
|
10
|
Ha WN, Shakibaie F, Kahler B, Walsh LJ. Deconvolution of the particle size distribution of ProRoot MTA and MTA Angelus. ACTA BIOMATERIALIA ODONTOLOGICA SCANDINAVICA 2016; 2:7-11. [PMID: 27335899 PMCID: PMC4894085 DOI: 10.3109/23337931.2015.1129611] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 12/06/2015] [Indexed: 11/13/2022]
Abstract
Objective Mineral trioxide aggregate (MTA) cements contain two types of particles, namely Portland cement (PC) (nominally 80% w/w) and bismuth oxide (BO) (20%). This study aims to determine the particle size distribution (PSD) of PC and BO found in MTA. Materials and methods The PSDs of ProRoot MTA (MTA-P) and MTA Angelus (MTA-A) powder were determined using laser diffraction, and compared to samples of PC (at three different particle sizes) and BO. The non-linear least squares method was used to deconvolute the PSDs into the constituents. MTA-P and MTA-A powders were also assessed with scanning electron microscopy. Results BO showed a near Gaussian distribution for particle size, with a mode distribution peak at 10.48 μm. PC samples milled to differing degrees of fineness had mode distribution peaks from 19.31 down to 4.88 μm. MTA-P had a complex PSD composed of both fine and large PC particles, with BO at an intermediate size, whereas MTA-A had only small BO particles and large PC particles. Conclusions The PSD of MTA cement products is bimodal or more complex, which has implications for understanding how particle size influences the overall properties of the material. Smaller particles may be reactive PC or unreactive radiopaque agent. Manufacturers should disclose particle size information for PC and radiopaque agents to prevent simplistic conclusions being drawn from statements of average particle size for MTA materials.
Collapse
Affiliation(s)
- William Nguyen Ha
- School of Dentistry, Oral Health Centre, The University of Queensland , Herston , Queensland , Australia
| | - Fardad Shakibaie
- School of Dentistry, Oral Health Centre, The University of Queensland , Herston , Queensland , Australia
| | - Bill Kahler
- School of Dentistry, Oral Health Centre, The University of Queensland , Herston , Queensland , Australia
| | - Laurence James Walsh
- School of Dentistry, Oral Health Centre, The University of Queensland , Herston , Queensland , Australia
| |
Collapse
|
11
|
Antonijevic D, Jeschke A, Colovic B, Milovanovic P, Jevremovic D, Kisic D, vom Scheidt A, Hahn M, Amling M, Jokanovic V, Busse B, Djuric M. Addition of a Fluoride-containing Radiopacifier Improves Micromechanical and Biological Characteristics of Modified Calcium Silicate Cements. J Endod 2015; 41:2050-7. [DOI: 10.1016/j.joen.2015.09.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 09/10/2015] [Accepted: 09/13/2015] [Indexed: 02/02/2023]
|
12
|
Saghiri MA, Orangi J, Tanideh N, Asatourian A, Janghorban K, Garcia-Godoy F, Sheibani N. Repair of bone defect by nano-modified white mineral trioxide aggregates in rabbit: A histopathological study. Med Oral Patol Oral Cir Bucal 2015; 20:e525-31. [PMID: 26034924 PMCID: PMC4598919 DOI: 10.4317/medoral.20290] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Accepted: 03/21/2015] [Indexed: 11/25/2022] Open
Abstract
Background Many researchers have tried to enhance materials functions in different aspects of science using nano-modification method, and in many cases the results have been encouraging. To evaluate the histopathological responses of the micro-/nano-size cement-type biomaterials derived from calcium silicate-based composition with addition of nano tricalcium aluminate (3CaO.Al2O3) on bone healing response. Material and Methods Ninety mature male rabbits were anesthetized and a bone defect was created in the right mandible. The rabbits were divided into three groups, which were in turn subdivided into five subgroups with six animals each based on the defect filled by: white mineral trioxide aggregate (WMTA), Nano-WMTA, WMTA without 3CaO.Al2O3, Nano-WMTA with 2% Nano-3CaO.Al2O3, and empty as control. Twenty, forty and sixty days postoperatively the animals were sacrificed and the right mandibles were removed for histopathological evaluations. Kruskal-Wallis test with post-hoc comparisons based on the LSMeans procedure was used for data analysis. Results All the experimental materials provoked a moderate to severe inflammatory reaction, which significantly differed from the control group (p< 0.05). Statistical analysis of bone formation and bone regeneration data showed significant differences between groups at 40- and 60- day intervals in all groups. Absence of 3CaO.Al2O3 leads to more inflammation and foreign body reaction than other groups in all time intervals. Conclusions Both powder nano-modification and addition of 2% Nano-3CaO.Al2O3 to calcium silicate-based cement enhanced the favorable tissue response and osteogenesis properties of WMTA based materials. Key words:Bone regeneration, cement, endodontics, histopathology, nano-wmta, tricalcium aluminate.
Collapse
|
13
|
|