Impact strength of an experimental polyurethane- based polymer

Authors

  • Z. Radzi Department of Children’s Dentistry & Orthodontics Faculty of Dentistry, University of Malaya 50603, Kuala Lumpur.
  • N.H. Abu Kasim Department of Conservative Dentistry Faculty of Dentistry, University of Malaya 50603, Kuala Lumpur
  • N.A. Yahya Department of Conservative Dentistry Faculty of Dentistry, University of Malaya 50603, Kuala Lumpur.
  • S.N. Gan Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur.
  • N.M. Daud Dental Officer Ministry of Health Malaysia
  • L. Saffai Dental Officer Ministry of Health Malaysia
  • F.A. Fadhel Department of Conservative Dentistry Faculty of Dentistry, University of Malaya 50603, Kuala Lumpur.

DOI:

https://doi.org/10.22452/adum.vol14no1.8

Keywords:

impact strength, denture based material, dental polymer

Abstract

The impact strength of a newly developed experimental polyurethane-based polymer which is derived from palm oil (Experimental PU) was compared with denture polymers; heat-cured and self cured polymethyl methacrylate (PMMA) and ? Eclipse , light-activated urethane dimethacrylate prosthetic resin system. Ten specimens were ? prepared using heat-cured PMMA (Meliodent Heat Cure, Heraeus Kulzer, Germany), self cured PMMA ? (Meliodent Rapid Repair, Heraeus Kulzer, ? Germany), Eclipse baseplate resin (Dentsply, USA) and Experimental PU material. Specimens were prepared following manu- facturer?s instructions except for the Experimental PU material where it was prepared in bulk and sectioned to the desired dimension, 64 x 6 x 4 mm. A ?V? notch of approximately 0.8mm in depth was machine cut across the 6mm width. Prior to the Charpy type impact test, specimens were soaked in a water bath for 50 hours at 37?C. ? Eclipse baseplate resin showed the highest 2 impact strength (2.73 kJ/m ?0.54) followed by ? 2 Meliodent Rapid Repair (2.50kJ/m ?0.65), ? 2 Meliodent Heat Cure (1.96kJ/m ?0.42) and 2 Experimental PU (1.04kJ/m ?0.29). One-way ANOVA showed significant interaction between materials (p<.05) and Tukey HSD revealed that Experimental PU exhibited significantly lower impact strength compared to other materials. ? Meliodent Rapid Repair was not significantly ? ? different from Meliodent Heat Cure and Eclipse baseplate resin. It can be concluded that the Experimental PU ? exhibited the lowest impact strength while Eclipse baseplate resin the highest.

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Published

2007-12-31

Issue

Vol. 14 No. 1 (2007)

Section

Articles

License

  1. The Faculty of Dentistry, Universiti Malaya holds the copyright of the published manuscript including all its components such as supplementary information, graphical contents and raw data without any restrictions.
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  3. After acceptance for publication in Ann Dent UM, the author(s) have the right to use any of its components in whole or in part for academic purposes such as, presentation in scientific conferences and seminars.

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