Effect of polymerization cycles on flexural strengths and microhardness of different denture base materials

Gungor H., GÜNDOĞDU M., Alkurt M., YEŞİL DUYMUŞ Z.

DENTAL MATERIALS JOURNAL, vol.36, no.2, pp.168-173, 2017 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 36 Issue: 2
  • Publication Date: 2017
  • Doi Number: 10.4012/dmj.2016-023
  • Journal Name: DENTAL MATERIALS JOURNAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.168-173
  • Keywords: Denture base material, Flexural strength, Microhardness, Polymerization cycle, ACRYLIC RESINS, RESIDUAL MONOMER, MICROWAVE-ENERGY, WATER-BATH, RELINE, CYTOTOXICITY, HARDNESS
  • Recep Tayyip Erdoğan University Affiliated: Yes

Abstract

The purpose of this study was to evaluate the effect of.different polymerization cycles on the flexural strengths and microhardness of two denture base materials (Meliodent and Paladent). Heat-polymerized acrylic resin specimens (65.0 mm longx10.0 mm widex2.5 mm in height) were prepared using different short and long polymerization cycles. After the specimens had been polymerized, they were stored in distilled water at 37 +/- 1 degrees C for 24 h. Flexural strength test was performed at a cross-head speed of 5 mm/min and Vickers microhardness was measured. Data were analyzed with a 1-way analysis of variance followed by Tukey test, and Student t-test (alpha=0.05). The flexural strengths and microhardness were significantly different between Meliodent and Paladent (p<0.05). Significant differences were found among the polymerization cycles in terms of flexural strengths and microhardness (p<0.05). Polymerization with G cycle may be suggested for Meliodent and H cycle may be suggested for Paladent.