Characterisation of dental resin composite with natural and synthetic hydroxyapatite-yttria stabilised zirconia fillers
<p>This study aimed to prepare and characterise dental resin composite with</p><p>hydroxyapatite-yttria stabilised zirconia (HAp-YSZ) fillers from natural and synthetic sources of</p><p>hydroxyapatite (HAp). The yttria stabilised...
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| Main Author: | |
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| Format: | thesis |
| Language: | eng |
| Published: |
2019
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| Subjects: | |
| Online Access: | https://ir.upsi.edu.my/detailsg.php?det=7231 |
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| Summary: | <p>This study aimed to prepare and characterise dental resin composite with</p><p>hydroxyapatite-yttria stabilised zirconia (HAp-YSZ) fillers from natural and synthetic sources of</p><p>hydroxyapatite (HAp). The yttria stabilised zirconia (YSZ) and HAp were used as reinforcement</p><p>inorganic fillers, while the organic resin were the blended monomers of bisphenol A glycerolate</p><p>dimethacrylate (Bis-GMA), triethylene glycol dimethacrylate (TEGDMA) and diurethane dimethacrylate</p><p>(UDMA). The composites were thoroughly blended at ratio of 70:30 wt/wt of fillers and resin. The</p><p>mixing ratios of fillers (YSZ:HAp) were fixed at 0:100; 10:90; 25:75; 50:50 and 75:25 wt/wt. The</p><p>composites were moulded and crosslinked under UV-light for 60 s on the both sides of samples</p><p>surfaces. The degree of conversion, flexural strength (FS), compression strength (CS), Vickers</p><p>hardness (VH), surface roughness (SR), water sorption, water solubility and cytotoxicity of</p><p>composites were measured. The results exhibited that the mechanical properties of YSZ-natural HAp</p><p>composites with ratio of 10:90 wt/wt (FS = 65.61 MPa; CS = 160.34 MPa; VH = 50.80 HV; SR = 120.00</p><p>nm) were better</p><p>performance than YSZ-synthetic HAp composites. Water sorption and solubility of this composite are</p><p>25.19 g mm? and 5.58 g mm?, respectively. The cytotoxicity test showed that this compositeis</p><p>non-toxic. As a conclusion, HAp-YSZ dental resin composites were successfully prepared and</p><p>characterised. The implication of this study is that the composite produced shows a potential to be</p><p>used as dental resin</p><p>composite.</p><p></p> |
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