1
|
Ai X, Liu Z, Wang T, Xie Q, Xie W. POSS hybrid bioactive glass dental composite resin materials: Synthesis and analysis. J Dent 2024; 142:104860. [PMID: 38281618 DOI: 10.1016/j.jdent.2024.104860] [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: 10/04/2023] [Revised: 01/14/2024] [Accepted: 01/22/2024] [Indexed: 01/30/2024] Open
Abstract
INTRODUCTION This study create a dental composite by hybirding polyhedral oligo-sesquioxide nano monomers and bioactive glass BG 45S5. METHODS Make an experimental composite resin material with a 60 % filler content overall by substituting 20 % of the filler with BG 45S5. The experimental resins are grouped and named P0, P2, P4, P6 and P8 based on the reactive nanomonomer methacrylic acid-based multifaceted oligomeric sesquisiloxane (POSS) added by 2 %-8 % in the resin matrix portion of each group. Utilize a universal testing machine to analyze and compare the mechanical properties of these, then perform Fourier infrared spectrum analysis, double bond conversion analysis, and scanning electron microscope analysis. Based on this, after soaking the experimental materials artificial saliva solution or lactic acid solution for a while, the pH changes of the solution, the release of Ca2+ and PO43- ions, and the precipitation of apatite on the resin material's surface were tested and analyzed. Cell viability tests were used to assess sample cell viability and quantify the cytotoxicity of biological cells. The independent sample t-test was used to examine the group comparisons, and a difference was considered statistically significant at P<0.05. RESULTS Outstanding mechanical and the double bond conversion are demonstrated by the nanocomposites when the POSS concentration hits 4 wt%. Agglomeration will cause the performance to deteriorate if the concentration beyond this threshold. In the P4 group, the double bond conversion, CS, and FS rose by a large margin, respectively, in comparison to the blank control group P0. Thankfully, the data demonstrate that adding POSS increases adhesive ability when compared to the blank group P0, however, there is no discernible difference between the other experimental groups. The acid neutralization capacity of the P4 group is essentially the same as that of the control group (P0). Ca2+ and PO43- ions are released in significant amounts following treatment with lactic acid solution, although this tendency is clearly less pronounced in artificial saliva. SEM and EDX data indicate that when the experimental resin is soaked in lactic acid solution and artificial saliva, apatite precipitation will happen on its surface. The results of the cell viability test indicated that there was no statistically significant difference between the experimental groups, and the viability of the cells increased after 24hours and 48 hours. CONCLUSIONS POSS was included into the composite resin along with 20% bioactive glass as a filler. When the proportion of POSS is less than 4%, the indices of composite resin materials rise in a dose-dependent way. When this value is surpassed, performance begins to deteriorate. The inclusion of POSS has no influence on the biological activity of the composites, which means that the hybrid composite resin is capable of acid neutralization, ion release, and apatite precipitation. CLINICAL SIGNIFICANCE The experimental composite resin can be used as an intelligent material in clinical treatment. It has the clinical application potential of preventing demineralization of tooth hard tissue, promoting remineralization, and improving edge sealing through apatite precipitation.
Collapse
Affiliation(s)
- XuanMei Ai
- The First Affiliated Hospital Of Harbin Medical Uhiversity, School of Stomatology, Harbin Medical University, Harbin 150001, China.
| | - ZhaoNan Liu
- The First Affiliated Hospital Of Harbin Medical Uhiversity, School of Stomatology, Harbin Medical University, Harbin 150001, China.
| | - TianQi Wang
- The First Affiliated Hospital Of Harbin Medical Uhiversity, School of Stomatology, Harbin Medical University, Harbin 150001, China.
| | - Qi Xie
- Department of Stomatology, Harbin Medical University, Harbin 150001, China.
| | - WeiLi Xie
- The First Affiliated Hospital Of Harbin Medical Uhiversity, School of Stomatology, Harbin Medical University, Harbin 150001, China.
| |
Collapse
|
2
|
He X, Zhang S, Zhong Y, Huang X, Liu F, He J, Mai S. A low-shrinkage-stress and anti-bacterial adherent dental resin composite: physicochemical properties and biocompatibility. J Mater Chem B 2024; 12:814-827. [PMID: 38189164 DOI: 10.1039/d3tb01556d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Abstract
Polymerisation shrinkage and biofilm accumulation are the two main problems associated with dental resin composites (DRCs) that induce secondary caries, which can cause restoration failure. Polymerisation shrinkage can lead to microleakage gaps between the tooth and the DRCs, causing the aggregation of bacteria and development of secondary caries. Reducing the shrinkage stress (SS) and improving the resistance to bacterial adhesion have always been the focus of this field in modifying DRCs. A thiol-ene resin system can effectively reduce the polymerisation SS via its step-growth mechanism for delaying the gel point. Fluorinated compounds can reduce the surface free energies, thereby reducing bacterial adhesion. Thus, in this study, a range of mass fractions (0, 10, 20, 30, and 40 wt%) of a fluorinated thiol-ene resin system were added to a fluorinated dimethacrylate resin system/tricyclo decanedimethanol diacrylate to create a fluorinated methacrylate-thiol-ene ternary resin matrix. DRCs were prepared using the obtained ternary resin matrix, and their physical and chemical properties, effect on bacterial adhesion, and biocompatibility were investigated. The results demonstrated that the volumetric shrinkage and SS of the DRCs were reduced with no reduction in conversion degree even after the thiol-ene resin system was added. All DRC-based fluorinated resin systems exhibited an excellent anti-bacterial adhesion effect, as evidenced by the colony-forming unit counts, live/dead bacterial staining, and crystal violet staining tests against Streptococcus mutans (S. mutans). The genetic expressions associated with the bacterial adhesion of S. mutans were substantially affected after being cultured with fluorinated DRCs. All fluorinated DRCs demonstrated good biocompatibility through the in vitro cytotoxicity test and live/dead staining images of the L-929 cells. The above results illustrate that the DRCs based on the fluorinated methacrylate-thiol-ene resin matrix can be potentially applied in clinical practice due to their low SS and anti-bacterial adhesion effect.
Collapse
Affiliation(s)
- Xinlin He
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong, 510055, People's Republic of China.
- Guanghua School of Stomatology, Sun Yat-sen University, Guangdong, 510055, People's Republic of China
- Institute of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong, 510055, People's Republic of China
| | - Shengcan Zhang
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong, 510641, People's Republic of China.
| | - Yewen Zhong
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong, 510055, People's Republic of China.
- Guanghua School of Stomatology, Sun Yat-sen University, Guangdong, 510055, People's Republic of China
- Institute of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong, 510055, People's Republic of China
| | - Xiangya Huang
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong, 510055, People's Republic of China.
- Guanghua School of Stomatology, Sun Yat-sen University, Guangdong, 510055, People's Republic of China
- Institute of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong, 510055, People's Republic of China
| | - Fang Liu
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong, 510641, People's Republic of China.
| | - Jingwei He
- College of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong, 510641, People's Republic of China.
| | - Sui Mai
- Hospital of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong, 510055, People's Republic of China.
- Guanghua School of Stomatology, Sun Yat-sen University, Guangdong, 510055, People's Republic of China
- Institute of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong, 510055, People's Republic of China
| |
Collapse
|
3
|
POSS and SSQ Materials in Dental Applications: Recent Advances and Future Outlooks. Int J Mol Sci 2023; 24:ijms24054493. [PMID: 36901923 PMCID: PMC10003367 DOI: 10.3390/ijms24054493] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/07/2023] [Accepted: 02/11/2023] [Indexed: 03/03/2023] Open
Abstract
Recently, silsesquioxanes (SSQ) and polyhedral oligomeric silsesquioxanes (POSS) have gained much interest in the area of biomaterials, mainly due to their intrinsic properties such as biocompatibility, complete non-toxicity, the ability to self-assemble and to form a porous structure, facilitating cell proliferation, creating a superhydrophobic surface, osteoinductivity, and ability to bind hydroxyapatite. All the above has resulted in new developments in medicine. However, the application of POSS-containing materials in dentistry is still at initial stage and deserves a systematic description to ensure future development. Significant problems, such as reduction of polymerization shrinkage, water absorption, hydrolysis rate, poor adhesion and strength, unsatisfactory biocompatibility, and corrosion resistance of dental alloys, can be addressed by the design of multifunctional POSS-containing materials. Because of the presence of silsesquioxanes, it is possible to obtain smart materials that allow the stimulation of phosphates deposition and repairing of micro-cracks in dental fillings. Hybrid composites result in materials exhibiting shape memory, as well as antibacterial, self-cleaning, and self-healing properties. Moreover, introducing POSS into polymer matrix allows for materials for bone reconstruction, and wound healing. This review covers the recent developments in the field of POSS application in dental materials and gives the future perspectives within a promising field of biomedical material science and chemical engineering.
Collapse
|
4
|
Madhuranthakam CMR, Pandiyan S, Elkamel A. Molecular Simulations of Low-Shrinkage Dental Resins Containing Methacryl-Based Polyhedral Oligomeric Silsesquioxane (POSS). Polymers (Basel) 2023; 15:polym15020432. [PMID: 36679311 PMCID: PMC9864306 DOI: 10.3390/polym15020432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/07/2023] [Accepted: 01/09/2023] [Indexed: 01/15/2023] Open
Abstract
Nanocomposites of methacrylate-based polyhedral oligomeric silsesquioxane (POSS) are used as resins in dentistry to fill dental cavities. In this article, molecular dynamics simulations (MDS) are used to study and understand the interactions of monofunctional and multifunctional methacrylate groups on hybrid resins containing POSS additives for dental applications. These interactions are further related to the structural properties of the nanocomposites, which in turn affect their macro-properties that are important, especially when used for specific uses such as dental resins. For monofunctional methacrylate, nanocomposite of methacryl isobutyl POSS (MIPOSS) and for multifunctional methacrylate, methacryl POSS (MAPOSS) are used in this study. Molecular dynamic simulations (MDS) are performed on both MIPOSS and MAPOSS systems by varying the amount of POSS. On a weight percent basis, 1%, 3%, 5%, and 10% POSS are added to the resin. Density calculations, stress-strain, and powder diffraction simulations are used to evaluate the macro-properties of these nanocomposites and compare them with the experimental findings reported in the literature. The observations from the simulation results when compared to the experimental results show that MDS can be efficiently used to design, analyze, and simulate new nanocomposites of POSS.
Collapse
Affiliation(s)
| | | | - Ali Elkamel
- Chemical Engineering Department, University of Waterloo, Waterloo, ON N2L 3G5, Canada
- Chemical Engineering Department, Khalifa University, Abu Dhabi 127788, United Arab Emirates
| |
Collapse
|
5
|
Novel Multifunctional Spherosilicate-Based Coupling Agents for Improved Bond Strength and Quality in Restorative Dentistry. MATERIALS 2022; 15:ma15103451. [PMID: 35629479 PMCID: PMC9147205 DOI: 10.3390/ma15103451] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 04/27/2022] [Accepted: 05/06/2022] [Indexed: 02/07/2023]
Abstract
The aim of this study was to investigate the restorative connections of composite materials after fracture, under controlled conditions of treating the materials with novel, spherosilicate-based (SS) primers bearing both methacryl (MA) and trimethoxysilyl (TMOS) groups. The chemistry of methacrylate group insertion and reactive groups hydrolysis has been studied with the aid of 1H NMR (Nuclear Magnetic Resonance) spectroscopy. The light-cured resin composites were repaired by activating the connection site with the obtained primers and, for comparison, a silane (methacryloxypropyltrimethoxysilane, MATMOS) as a conventional coupling agent bearing the same reactive groups. The resistance of such a joint was tested in a three-point bending test after 24 h and 28 days period of sample conditioning. The effect of bond application was also studied, showing that spherosilicate-based primers may be used more effectively than MATMOS for two-step (primer-composite) restorative process, while for silane, the three-step process with bond application is crucial for satisfactory joint quality. The joint failure mode was determined by microscopic analysis and it was found that SS-4MA-4TMOS and SS-2MA-6TMOS application resulted in mostly composite, and not joint, failure. After 28 days of conditioning, the flexural strength of the joint repaired with SS-4MA-4TMOS was at 94% of the neat, solid material under the same procedure. However, the strength of the neat composite was observed to decline during the conditioning process by ~30%. The joint behavior was explained on the basis of the gradual hydrolysis effect (the greatest decrease being observed for silane).
Collapse
|
6
|
Jagannathan JR, Targos K, Franz AK. Synthesis of Functionalized Silsesquioxane Nanomaterials by Rhodium‐Catalyzed Carbene Insertion into Si−H Bonds. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202110417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jake R. Jagannathan
- Department of Chemistry University of California, Davis One Shields Avenue Davis CA USA
| | - Karina Targos
- Department of Chemistry University of California, Davis One Shields Avenue Davis CA USA
| | - Annaliese K. Franz
- Department of Chemistry University of California, Davis One Shields Avenue Davis CA USA
| |
Collapse
|
7
|
Jagannathan JR, Targos K, Franz AK. Synthesis of Functionalized Silsesquioxane Nanomaterials by Rhodium-Catalyzed Carbene Insertion into Si-H bonds. Angew Chem Int Ed Engl 2021; 61:e202110417. [PMID: 34693589 DOI: 10.1002/anie.202110417] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 10/10/2021] [Indexed: 12/12/2022]
Abstract
We report carbene insertion into Si-H bonds of polyhedral oligomeric silsesquioxanes (POSS) for the synthesis of highly functionalized siloxane nanomaterials. Dirhodium(II) carboxylates catalyze insertion of aryl-diazoacetates as carbene precursors to afford POSS structures containing both ester and aryl groups as orthogonal functional handles for further derivatization of POSS materials. Four diverse and structurally varied silsesquioxane core scaffolds with one, three, or eight Si-H bonds were evaluated with diazo reactants to produce a total of 20 new POSS compounds. Novel diazo compounds containing a fluorinated octyl group and boron-dipyrromethene (BODIPY) chromophore demonstrate the use of highly functionalized substrates. Transformations of aryl(ester)-functionalized POSS compounds derived from this method are demonstrated, including ester hydrolysis and Suzuki-Miyaura cross-coupling.
Collapse
Affiliation(s)
- Jake R Jagannathan
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, CA, USA
| | - Karina Targos
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, CA, USA
| | - Annaliese K Franz
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, CA, USA
| |
Collapse
|
8
|
Modified POSS nano-structures as novel co-initiator-crosslinker: Synthesis and characterization. Dent Mater 2021; 37:1283-1294. [PMID: 34023144 DOI: 10.1016/j.dental.2021.04.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Accepted: 04/30/2021] [Indexed: 11/21/2022]
Abstract
OBJECTIVE To synthesize an amine-modified polyhedral oligomeric silsesquioxane (POSS) nano-structure as a novel co-initiator-crosslinker (co-Ini-Linker) and to determine the effect of the co-Ini-linker on the physical and mechanical behavior of an experimental dental composite. METHODS The amine-methacrylate POSS nano-structures (AMA-POSS) were chemically synthesized by anchoring a tertiary amine functionality on the methacrylate POSS (MA-POSS) branches. Three types of AMA-POSS, having different amine branches in their structures, were synthesized through the Aza Michael reaction. The chemical structure of AMA-POSSs were evaluated by1H-NMR spectroscopy. Afterward, the AMA-POSS was incorporated into a dental resin system composed of Bis-GMA, TEGDMA, and photo-initiator. Three resin systems with different AMA-POSS types were then prepared, and their properties were compared with a resin containing DMAEMA as a conventional co-initiator. The degree of conversion evaluated by FTIR spectroscopy and the shrinkage kinetics of the resins were determined through the bonded-disk technique. The flexural properties of the photopolymerized resins were also investigated. The distribution of nano-structures in the matrix resin was analyzed using EDX analysis. RESULTS The modified POSS structure and the number of amine branches were confirmed with1H-NMR spectroscopy. The resin containing 8 amine branches (P8) showed the same degree of conversion (DC%) as the resin containing DMAEMA (P > 0.05). Decreasing the amine branches in the POSS structure, however, revealed an increasing trend in DC%. The resin containing P8 showed the lowest shrinkage strain. By incorporating AMA-POSS into the resin system, the water sorption significantly decreased (P < 0.05). The flexural strength and modulus increased by adding P3 into the resin system (P < 0.05). EDX Si-map revealed that the co-Ini-linker was well dispersed in the resin matrix. SIGNIFICANCE The synthesized novel amine-methacrylate POSS nanostructures not only act as an amine co-initiator but also work as a reinforcing filler and a cross-linking agent.
Collapse
|
9
|
da Silva Meirelles Dória Maia JN, Portela MB, Sanchez Candela DR, Neves ADA, Noronha-Filho JD, Mendes ADO, Barros MA, Moreira da Silva E. Fabrication and characterization of remineralizing dental composites containing calcium type pre-reacted glass-ionomer (PRG-Ca) fillers. Dent Mater 2021; 37:1325-1336. [PMID: 33962791 DOI: 10.1016/j.dental.2021.04.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 04/09/2021] [Accepted: 04/24/2021] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To fabricate and characterize dental composites with calcium type pre-reacted glass-ionomer (PRG-Ca) fillers. METHODS PRG-Ca fillers were prepared by the reaction of calcium fluoroaluminosilicate glass with polyacrylic acid. Seven dental composites were produced from the same organic matrix (70/30wt% Bis-GMA/TEGDMA), with partial replacement of barium borosilicate (BaBSi) fillers (60wt%) by PRG-Ca fillers (wt%): E0 (0) - control, E1 (10), E2 (20), E3 (30), E4 (40), E5 (50) and E6 (60). Enamel remineralization was evaluated in caries-like enamel lesions induced by S. mutans biofilm using micro-CT. The following properties were characterized: degree of conversion (DC%), roughness (Ra), Knoop hardness (KHN), flexural strength (FS), flexural modulus (FM), water sorption (Wsp), water solubility (Wsl), and translucency (TP). Data were analyzed to one-way ANOVA and Tukey's HSD test (α=0.05). RESULTS All composites with PRG-Ca induced enamel remineralization. E0 and E1 presented similar and highest DC% than E2=E3=E4=E5=E6. Ra and KHN were not influenced by PRG-Ca fillers (p<0.05). The higher the content of PRG-Ca, the lower FS, FM and TP (p<0.05). Wsp increased linearly with the content of PRG-Ca fillers (p<0.05). E6 presented the highest Wsl (p<0.05), while the Wsl of the other composites were not different from each other (p>0.05). SIGNIFICANCE Incorporation of 10-40wt.% of PRG-Ca fillers endowed remineralizing potential to dental composites without jeopardizing the overall behavior of their physicochemical properties. Dental composites with PRG-Ca fillers seems to be a good alternative for reinforcing the enamel against caries development.
Collapse
Affiliation(s)
| | - Maristela Barbosa Portela
- Odontopediatric Division, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | | | - Aline de Almeida Neves
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Brazil; Department of Paediatric Dentistry, King's College London, London, UK
| | - Jaime Dutra Noronha-Filho
- Analitical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Amanda de Oliveira Mendes
- Analitical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Mariana Araújo Barros
- Analitical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Eduardo Moreira da Silva
- Analitical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.
| |
Collapse
|
10
|
Characterization of Methacrylate-Based Resins Containing Methacryl-Polyhedral Oligomeric Silsesquioxanes (MA-POSS-8). MATERIALS 2021; 14:ma14071680. [PMID: 33805511 PMCID: PMC8036278 DOI: 10.3390/ma14071680] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 03/23/2021] [Accepted: 03/25/2021] [Indexed: 12/02/2022]
Abstract
The use of functionalized dental adhesives that might prevent degradation of the dentin hybrid layer has been proposed. The aim of the study was to characterize the physicochemical properties and the potential to induce mineral precipitation of methacrylate-based resins containing methacryl-functionalized polyhedral oligomeric silsesquioxane (MA-POSS-8). In total, six different compositions of resins based on bisphenol A glycerolate dimethacrylate (BisGMA, 40 to 60 wt.%), triethylene glycol dimethacrylate (TEGDMA, 5 to 35 wt.%) and 2-hydroxyethyl methacrylate (HEMA, 25 or 35 wt.%) were prepared and infiltrated with 5 wt.% MA-POSS-8. Unfilled resins served as control. Degree of conversion, viscosity, Martens hardness, indentation modulus, water sorption, and sol fraction were investigated. Polymerized specimens were examined by SEM/EDX for the presence of Ca/P precipitates after immersion in artificial saliva for 28 days at 37 °C. Statistical analysis was performed with two-way ANOVA and Tukey’s post-hoc test (p < 0.05). The degree of conversion ranged from 55.0 to 59.8% and was not affected by the addition of MA-POSS-8. Viscosity ranged from 60.0 to 422.3 mPa*s and was not affected by MA-POSS-8 except for one methacrylate-based resin with 60 wt.% BisGMA. Martens hardness and indentation modulus ranged from 161.3 to 138.1 N/mm2 and 4.2 to 3.9 kN/mm2 and were affected by MA-POSS-8 in only one resin (50 wt.% BisGMA, 25 wt.% TEGDMA, 25 wt.% HEMA). Water sorption was not affected by MA-POSS-8; sol fraction was below the detection limit. Formation of Ca/P precipitates was observed on all specimens of test and control groups. Material properties were not affected adversly by MA-POSS-8 except for slight differences in Martens Hardness, indentation modulus, viscosity, in some groups.
Collapse
|
11
|
Lin GSS, Abdul Ghani NRN, Ismail NH, Singbal KP, Yusuff NMM. Polymerization Shrinkage and Degree of Conversion of New Zirconia-Reinforced Rice Husk Nanohybrid Composite. Eur J Dent 2020; 14:448-455. [PMID: 32599624 PMCID: PMC7440950 DOI: 10.1055/s-0040-1713951] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Objectives
This study aimed to compare the polymerization shrinkage and degree of conversion of new zirconia-reinforced rice husk nanohybrid composite with commercialized microhybrid and nanofilled composites.
Materials and Methods
Overall, 180 samples were used for polymerization shrinkage (buoyancy and optical methods) and degree of conversion tests in which they were divided into Group 1, nanofilled composite (Filtek-Z350- XT; 3M ESPE, St Paul, MN 55144-1000, USA), Group 2, microhybrid composite (Zmack-Comp), and Group 3, nanohybrid composite (Zr-Hybrid). Polymerization shrinkage test was performed using buoyancy and optical methods. For buoyancy method, samples were weighed in air and water to calculate the shrinkage value, whereas, for optical method, images of nonpolymerized samples were captured under a digital microscope and recaptured again after light-cured to calculate the percentage of shrinkage. Degree of conversion was tested using Fourier-transform infrared spectroscopy spectrometer.
Statistical Analysis
Data were analyzed using one-way analysis of variance complemented by post hoc Dunnett’s T3 test for polymerization shrinkage and Tukey’s honestly significant difference test for degree of conversion. Level of significance was set at
p
< 0.05.
Results
Group 3 demonstrated similar polymerization shrinkage with Group 1, but lower shrinkage (
p
< 0.05) than Group 2 based on buoyancy method. However, optical method (
p
< 0.05) showed that Group 3 had the lowest shrinkage, followed by Group 1 and lastly Group 2. Besides, Group 3 showed a significantly higher degree of conversion (
p
< 0.05) than Group 1 and comparable conversion value with Group 2.
Conclusions
Zirconia-reinforced rice husk nanohybrid composite showed excellent shrinkage and conversion values, hence can be considered as an alternative to commercially available composite resins.
Collapse
Affiliation(s)
- Galvin Sim Siang Lin
- Conservative Dentistry Unit, School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian, Kota Bharu, Kelantan, Malaysia
| | - Nik Rozainah Nik Abdul Ghani
- Conservative Dentistry Unit, School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian, Kota Bharu, Kelantan, Malaysia
| | - Noor Huda Ismail
- Prosthodontic Unit, School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian, Kota Bharu, Kelantan, Malaysia
| | - Kiran Prabhakar Singbal
- Department of Restorative Dentistry, Faculty of Dentistry, Mahsa University, Selangor, Malaysia
| | - Noraida Mamat Mohd Yusuff
- Paediatric Dentistry Unit, School of Dental Sciences, Universiti Sains Malaysia, Kubang Kerian, Kota Bharu, Kelantan, Malaysia
| |
Collapse
|
12
|
Bredov NS, Bykovskaya AA, Van Tuan N, Kireev VV, Tupikov AS, Sokol’skaya IB, Posokhova VF, Chuev VP. Oligomeric Silsesquioxane–Siloxane Modifiers for Polymer Dental Compounds. POLYMER SCIENCE SERIES B 2020. [DOI: 10.1134/s1560090420030033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
13
|
Jardim RN, Rocha AA, Rossi AM, de Almeida Neves A, Portela MB, Lopes RT, Pires Dos Santos TM, Xing Y, Moreira da Silva E. Fabrication and characterization of remineralizing dental composites containing hydroxyapatite nanoparticles. J Mech Behav Biomed Mater 2020; 109:103817. [PMID: 32543392 DOI: 10.1016/j.jmbbm.2020.103817] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 04/17/2020] [Accepted: 04/20/2020] [Indexed: 11/25/2022]
Abstract
The aim of this study was to fabricate and characterize dental composites containing hydroxyapatite nanoparticles (HApNPs). Four dental composites were produced from the same organic matrix (70 wt% Bis-GMA and 30 wt% TEGDMA), with partial replacement of BaBSi particles (65 wt%) by HApNPs in the following concentrations (wt%): E0 (0) - control, E10 (10), E20 (20) and E30 (30). Ca2+ and PO43- release was evaluated in solutions with different pHs (4, 5.5, and 7) using atomic emission spectroscopy with microwave-induced nitrogen plasma while the enamel remineralization potential was evaluated in caries-like enamel lesions induced by S. mutans biofilm using micro-CT. The following properties were characterized: degree of conversion (DC%), microhardness (KHN), flexural strength (FS), elastic modulus (EM) and translucency (TP). The higher the HApNPs content, the higher the Ca2+ and PO43- release. The ions release was influenced by pH (4 > 5.5 > 7) (p < 0.05). All composites loaded with HApNPs were able to remineralize the enamel (E30 = E20 > E10) (p < 0.05). Contrarily, E0 was not able of recovering the enamel mineral loss. E0 and E10 presented highest DC%, while E20 and E30 showed similar and lowest DC%. KHN and FS were decreased with the addition of HApNPs, while EM was not influenced by the incorporation of HApNPs. E10 presented statistically similar TP to E0, while this property decreased for E20 and E30 (p < 0.05). Incorporation of HApNPs into dental composites promoted enamel remineralization, mainly at potentially cariogenic pH (= 4), while maintained their overall performance in terms of physicomechanical properties.
Collapse
Affiliation(s)
- Renata Nunes Jardim
- Analytical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Anderson Araújo Rocha
- Department of Analytical Chemistry and NAB - Nucleus of Biomass Studies and Water Management - Federal Fluminense University, Niterói, Rio de Janeiro, Brazil
| | | | - Aline de Almeida Neves
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; Department of Paediatric Dentistry, King's College London, London, UK
| | - Maristela Barbosa Portela
- Odontopediatric Division, School of Dentistry, Federal Fluminense University, Niterói, Rio de Janeiro, Brazil
| | - Ricardo Tadeu Lopes
- Laboratory for Nuclear Instrumentation, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | | | - Yutao Xing
- High-resolution Electron Microscopy Lab, Advanced Characterization Center for Petroleum Industry, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - Eduardo Moreira da Silva
- Analytical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.
| |
Collapse
|
14
|
Li Z, Zhang H, Xiong G, Zhang J, Guo R, Li L, Zhou H, Chen G, Zhou Z, Li Q. A low-shrinkage dental composite with epoxy-polyhedral oligomeric silsesquioxane. J Mech Behav Biomed Mater 2020; 103:103515. [DOI: 10.1016/j.jmbbm.2019.103515] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 10/30/2019] [Accepted: 10/30/2019] [Indexed: 10/25/2022]
|
15
|
Wang J, Liu Y, Yu J, Sun Y, Xie W. Study of POSS on the Properties of Novel Inorganic Dental Composite Resin. Polymers (Basel) 2020; 12:polym12020478. [PMID: 32093186 PMCID: PMC7077635 DOI: 10.3390/polym12020478] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 02/14/2020] [Accepted: 02/18/2020] [Indexed: 11/16/2022] Open
Abstract
: Various amounts of methacryl polyhedral oligomeric silsesquioxane (POSS) were explored to be incorporated into novel nano SiO2 dental resin composites using light curing method. The scanning electron microscopy (SEM), optical microscopy, fourier transform infrared spectroscopy (FTIR), nanoindentation, nanoscratch and three-point flexure tests were performed. The volumetric shrinkage and mechanical properties such as hardness, elastic modulus, resistance, flexural strength and fracture energy were analyzed. With the additions of POSS, the volume shrinkage decreased and the mechanical properties initially increased. The effects of POSS on these properties were studied to provide a reference for clinically selecting a composite resin with excellent properties.
Collapse
Affiliation(s)
- Jiahui Wang
- College of materials, Shanghai Dianji University, Shanghai 200000, China
| | - Yizhi Liu
- Department of Astronautic Science and Mechanics, Harbin Institute of Technology, Harbin 150000, China
- Correspondence:
| | - Jianxin Yu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150000, China
| | - Yi Sun
- Department of Astronautic Science and Mechanics, Harbin Institute of Technology, Harbin 150000, China
| | - Weili Xie
- Department of Stomatology, Harbin Medical University, Harbin 150000, China
| |
Collapse
|