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Properties of A Model Self-Healing Microcapsule-Based Dental Composite Reinforced with Silica Nanoparticles
| Content Provider | MDPI |
|---|---|
| Author | Althaqafi, Khaled Abid Alshabib, Abdulrahman Satterthwaite, Julian Silikas, Nikolaos |
| Copyright Year | 2022 |
| Description | Aim: The purpose of this study was to evaluate the mechanical properties of an experimental self-healing dental composite model (SHDC) composed of $SiO_{2}$ nanoparticles with varying percentages of triethylene glycol dimethacrylate (TEGDMA) monomer and N,N-dihydroxyethyl-p-toluidine (DHEPT) amine microcapsules. Materials and methods: Microcapsules were prepared by in-situ polymerisation of PUF shells, as explained in our previous work. The model SHDC included bisphenol A glycidyl dimethacrylate (Bis-GMA:TEGDMA) (1:1), 1 wt% phenyl bis(2,4,6-trimethylbenzoyl) phosphine oxide (BAPO), 0.5 wt% benzoyl peroxide (BPO) catalyst, 20 wt% silanised silica dioxide $(SiO_{2}$) (15 nm) and (0, 2.5, 5, 7.5, 10 wt%) of microcapsules (120 ± 45 μm). Light transmission, hardness, degree of conversion (DC), flexural strength and elastic modulus of the SHDC model were measured. Results: The degree of conversion of the SHDC ranged from 73 to 76% 24 h after polymerisation. Hardness measurements ranged from 22 to 26 VHN (p > 0.05); however, the flexural strength was adversely affected from 80 to 55 MPa with increasing microcapsules of up to 10 wt% in the composites (p < 0.05). Conclusion: Only flexural strength decreased drastically ~30% with increasing microcapsules (>10 wt%) in the composites. All other measured properties were not significantly affected. Accordingly, we recommend a stronger composite material that could be created by increasing the filler content distribution in order to achieve a hybrid self-healing composite with enhanced mechanical properties. |
| Starting Page | 19 |
| e-ISSN | 20794983 |
| DOI | 10.3390/jfb13010019 |
| Journal | Journal of Functional Biomaterials |
| Issue Number | 1 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-02-14 |
| Access Restriction | Open |
| Subject Keyword | Journal of Functional Biomaterials Dentistry and Oral Surgery Self Healing Self Sealing Microcapsules Resin Composites Dental Composites |
| Content Type | Text |
| Resource Type | Article |
