Radzi, Z.; Abu Kasim, N.H.; Yahya, NA; Gan, SN (2007) Impact strength of an experimental polyurethane-based polymer. Annal Dent Univ Malaya, 14. pp. 46-51.
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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 EclipseÂ®, light-activated urethane dimethacrylate prosthetic resin system. Ten specimens were prepared using heat-cured PMMA (MeliodentÂ® Heat Cure, Heraeus Kulzer, Germany), self cured PMMA (MeliodentÂ® Rapid Repair, Heraeus Kulzer, Germany), EclipseÂ® baseplate resin (Dentsply, USA) and Experimental PU material. Specimens were prepared following manufacturerâ��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 â��Vâ�� 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 37ÂºC. EclipseÂ® baseplate resin showed the highest impact strength (2.73 kJ/m2Â±0.54) followed by MeliodentÂ® Rapid Repair (2.50kJ/m2Â±0.65), MeliodentÂ® Heat Cure (1.96kJ/m2Â±0.42) and Experimental PU (1.04kJ/m2Â±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. MeliodentÂ® Rapid Repair was not significantly different from MeliodentÂ® Heat Cure and EclipseÂ® baseplate resin. It can be concluded that the Experimental PU exhibited the lowest impact strength while EclipseÂ® baseplate resin the highest.
|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|
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:||02 Feb 2012 16:58|
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