Impact strength, fracture toughness and hardness improvement of PMMA denture base through addition of nitrile rubber/ceramic fillers
Background/purpose: PMMA resin mostly used the fabrication of denture base by heatcuring technique. It has poor strength, including low impact strength and low fatigue resistance. In this work the combination of nitrile butadiene rubber (NBR) with two types of ceramic fillers (Al2O3 and YSZ, resp...
| Main Authors: | , , |
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| Format: | Article |
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Elsevier
2017
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| Online Access: | http://eprints.usm.my/36983/ |
| _version_ | 1848878063773810688 |
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| author | Alhareb, Ahmed Omran Md Akil, Hazizan Ahmad, Zainal Arifin |
| author_facet | Alhareb, Ahmed Omran Md Akil, Hazizan Ahmad, Zainal Arifin |
| author_sort | Alhareb, Ahmed Omran |
| building | USM Institutional Repository |
| collection | Online Access |
| description | Background/purpose: PMMA resin mostly used the fabrication of denture base by heatcuring
technique. It has poor strength, including low impact strength and low fatigue resistance. In
this work the combination of nitrile butadiene rubber (NBR) with two types of ceramic fillers
(Al2O3 and YSZ, respectively) on the mechanical properties of denture base are investigated.
Materials and methods: The denture base composites were fabricated by incorporating PMMA
powder, 0.5 wt% of benzoyl peroxide (BPO), fixed at 7.5 wt% NBR particles and ceramic fillers
(fixed at 5 wt%) as powder components. In total, 180 specimens were prepared for all tests and
divided into 6 groups for each test (N= 10) coded G1–G6. Group 1 as the control group (without
fillers) was mixed between PMMA powder and BPO; whereas the other five groups (G2–G6) were
reinforced with NBR particles and different concentrations of ceramic fillers. The morphology of
the fracture surface of specimens was examined by Field Emission Scanning Electron Microscopy
(FESEM).
Results: Statistical analysis, shows that the mean impact strength (IS) and fracture toughness (KIC)
of control dentures when compared to reinforced PMMA at 7.5% NBR and 2.5% Al2O3/2.5%
YSZ improved significantly (5.27± 0.21–10.25 ± 0.41 kJ/m2 and 1.60 ± 0.24–2.58
±0.30 MPa�m1/2, respectively). |
| first_indexed | 2025-11-15T17:25:23Z |
| format | Article |
| id | usm-36983 |
| institution | Universiti Sains Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T17:25:23Z |
| publishDate | 2017 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | usm-369832017-10-09T09:15:34Z http://eprints.usm.my/36983/ Impact strength, fracture toughness and hardness improvement of PMMA denture base through addition of nitrile rubber/ceramic fillers Alhareb, Ahmed Omran Md Akil, Hazizan Ahmad, Zainal Arifin TN1-997 Mining engineering. Metallurgy Background/purpose: PMMA resin mostly used the fabrication of denture base by heatcuring technique. It has poor strength, including low impact strength and low fatigue resistance. In this work the combination of nitrile butadiene rubber (NBR) with two types of ceramic fillers (Al2O3 and YSZ, respectively) on the mechanical properties of denture base are investigated. Materials and methods: The denture base composites were fabricated by incorporating PMMA powder, 0.5 wt% of benzoyl peroxide (BPO), fixed at 7.5 wt% NBR particles and ceramic fillers (fixed at 5 wt%) as powder components. In total, 180 specimens were prepared for all tests and divided into 6 groups for each test (N= 10) coded G1–G6. Group 1 as the control group (without fillers) was mixed between PMMA powder and BPO; whereas the other five groups (G2–G6) were reinforced with NBR particles and different concentrations of ceramic fillers. The morphology of the fracture surface of specimens was examined by Field Emission Scanning Electron Microscopy (FESEM). Results: Statistical analysis, shows that the mean impact strength (IS) and fracture toughness (KIC) of control dentures when compared to reinforced PMMA at 7.5% NBR and 2.5% Al2O3/2.5% YSZ improved significantly (5.27± 0.21–10.25 ± 0.41 kJ/m2 and 1.60 ± 0.24–2.58 ±0.30 MPa�m1/2, respectively). Elsevier 2017-07 Article PeerReviewed Alhareb, Ahmed Omran and Md Akil, Hazizan and Ahmad, Zainal Arifin (2017) Impact strength, fracture toughness and hardness improvement of PMMA denture base through addition of nitrile rubber/ceramic fillers. Saudi Journal for Dental Research, 8 (1-2). pp. 26-34. ISSN 2352-0035 https://doi.org/10.1016/j.sjdr.2016.04.004 |
| spellingShingle | TN1-997 Mining engineering. Metallurgy Alhareb, Ahmed Omran Md Akil, Hazizan Ahmad, Zainal Arifin Impact strength, fracture toughness and hardness improvement of PMMA denture base through addition of nitrile rubber/ceramic fillers |
| title | Impact strength, fracture toughness and hardness
improvement of PMMA denture base through
addition of nitrile rubber/ceramic fillers |
| title_full | Impact strength, fracture toughness and hardness
improvement of PMMA denture base through
addition of nitrile rubber/ceramic fillers |
| title_fullStr | Impact strength, fracture toughness and hardness
improvement of PMMA denture base through
addition of nitrile rubber/ceramic fillers |
| title_full_unstemmed | Impact strength, fracture toughness and hardness
improvement of PMMA denture base through
addition of nitrile rubber/ceramic fillers |
| title_short | Impact strength, fracture toughness and hardness
improvement of PMMA denture base through
addition of nitrile rubber/ceramic fillers |
| title_sort | impact strength, fracture toughness and hardness
improvement of pmma denture base through
addition of nitrile rubber/ceramic fillers |
| topic | TN1-997 Mining engineering. Metallurgy |
| url | http://eprints.usm.my/36983/ http://eprints.usm.my/36983/ |