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ORIGINAL ARTICLE
Year : 2005  |  Volume : 5  |  Issue : 1  |  Page : 33-36

The effect on indirect tensile mechanical properties of light polymerized composites by polymerization under pressure


Department of Prosthodontics, Sharad Pawar Dental College, Sawangi, Wardha, India

Correspondence Address:
Nitu S Murarka
Department of Prosthodontics, Sharad Pawar Dental College, Sawangi (Meghe), Wardha - 442 004
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0972-4052.16339

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Flaws developed during the polymerization of composites cause weakness in the final product with a decrease in the value of its mechanical properties [dimetral tensile strength (DTS)]. Therefore, reducing the flaws within the material may improve its mechanical performance. The aim of this study is to determine the effect of polymerization under pressure on the indirect tensile mechanical properties (stiffness and DTS) of light polymerized composite. As composite is a brittle material and failure occurs because of low resistance to tensile stresses, comparison between materials and their failure probability should be based on tensile properties. A special mold is prepared that enables polymerization under pressure. Stiffness (N/mm) and DTS (MPa) are analysed while loading the specimen to failure with an Instron testing machine. Thus, the effect of polymerization under pressure on properties is studied.


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