Impact strength of an experimental polyurethane-based polymer

Radzi, Z.; Abu Kasim, N.H.; Yahya, N.A.; Gan, S.N. (2007) Impact strength of an experimental polyurethane-based polymer. Annal Dent Univ Malaya, 14. pp. 46-51.

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      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 manufacturer�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 37ºC. Eclipse® baseplate resin showed the highest impact strength (2.73 kJ/m2±0.54) followed by Meliodent® Rapid Repair (2.50kJ/m2±0.65), Meliodent® Heat Cure (1.96kJ/m2±0.42) and Experimental PU (1.04kJ/m2±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.

      Item Type: Article
      Creators:
      1. Radzi, Z.
      2. Abu Kasim, N.H.(Department of Conservative Dentistry, Faculty of Dentistry Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA)
      3. Yahya, N.A.
      4. Gan, S.N.
      Journal or Publication Title: Annal Dent Univ Malaya
      Additional Information: Associate Prof. Dr. Noor Hayaty Binti Abu Kasim Department of Conservative Dentistry, Faculty of Dentistry Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
      Uncontrolled Keywords: Impact Strength; Denture Based Material; Dental Polymer; Self-Repair; Culture-Conditions; Composite Resin; Dental Pulp Stem Cell; Functionally Graded Design; Multi Layered Post; Functionally Graded Dental Post; Soft Skills; Clinical Pairing; Dental Pulp Stromal Cells; Long-Term Expansion
      Subjects: R Medicine
      R Medicine > R Medicine (General)
      R Medicine > RK Dentistry
      Divisions: Faculty of Dentistry > Dept of Conservative Dentistry
      Depositing User: Associate Prof. Dr. Noor Hayaty Abu Kasim
      Date Deposited: 02 Feb 2012 16:58
      Last Modified: 27 Oct 2014 14:46
      URI: http://eprints.um.edu.my/id/eprint/2529

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