Properties Of Different Fillers In Acrylic Resin For Denture Application
Dental base which fabricated by Polymethyl methacrylate (PMMA) resin are commonly used due to its good physical and aesthetic properties. In this project, the aim is to identify the most suitable filler and optimum filler loading to improve PMMA resin properties. The mechanical properties of PMMA...
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| Main Author: | |
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| Format: | Monograph |
| Language: | English |
| Published: |
Universiti Sains Malaysia
2017
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| Subjects: | |
| Online Access: | http://eprints.usm.my/52767/1/Properties%20Of%20Different%20Fillers%20In%20Acrylic%20Resin%20For%20Denture%20Application_Tan%20Jia%20Sheng_B1_2017.pdf http://eprints.usm.my/52767/ |
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| Summary: | Dental base which fabricated by Polymethyl methacrylate (PMMA) resin are
commonly used due to its good physical and aesthetic properties. In this project, the aim
is to identify the most suitable filler and optimum filler loading to improve PMMA resin
properties. The mechanical properties of PMMA composites were determined based on
flexural properties, fracture toughness, hardness and impact strength. PMMA composites
were mixed by using Stryker Mixevac III bowl under vacuum condition. In the first stage,
mechanical testing was carried out to determine the most suitable weight loading
percentage between HA and β-TCP fillers. PMMA/2% HA composite showed better
improvement than other filler loadings. Hence in the second stage, PMMA/2% HA
composite was modified by various weight loading percentage of NBR and the
mechanical properties, thermal stability and water absorption were measured. It is
observed that no significant improvement in mechanical properties was obtained by
adding NBR in PMMA/2% HA. However addition of NBR is able to increase the thermal
stability and reduce water absorption. In third stages, PMMA/2% HA was added with
hybrid fillers where 2% HA was hybridized with 2% PLA microsphere, untreated Al2O3
or treated Al2O3. PMMA/2% HA/2% PLA microsphere showed small improvement
toward impact strength and fracture toughness while PMMA/2% HA/2% treated Al2O3
showed improvement in flexural strength. In conclusion, 2% HA filler able to increase
the mechanical properties of PMMA resin significantly and the properties can be further
improved by hybrid fillers |
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