THE EFFECT OF TWO CURING PROCESSING TIME BY IVOMAT ON THE POROSITY OF COLD CURE  ACRYLIC RESIN DENTURE BASE  (A COMPARATIVE STUDY)

	THE EFFECT OF TWO CURING PROCESSING TIME BY IVOMAT ON THE POROSITY OF COLD CURE ACRYLIC RESIN DENTURE BASE (A COMPARATIVE STUDY)
journal of kerbala university
Article 1, Volume 6, Issue 2, 2010, Pages 37-43 PDF (0 K)
Abstract
This study aimed at assessing the effect of two times curing by Ivomat on the porosity of cold cured acrylic resin denture base at the center and the periphery of the specimens for (15) and (20) minutes, and comparing that with cold cured acrylic resin polymerized chemically on air (Control group). 30 samples specimens of (65 x 62 x 64 x 61 mm), with (3 mm) thickness according to (ADA specification No.12) . There were 3 experimental groups, (n = 10 per group): G1) cold cure acrylic resin (chemical curing- 45 minutes) as a control group; G2) cold cure acrylic resin (Ivomat curing technique- 15 minutes); G3) cold cure acrylic resin (Ivomat curing technique- 20 minutes). The porosity test was assessed after specimens were completely cured, finished and polished, and then immersed in black ink and the pores counted in a microscope. Generally the results revealed that the cold cure acrylic specimens which processed in Ivomate for (15) and (20) minutes introduced less porosity level in the periphery than that of the center, and the cold cure acrylic specimens which processed in Ivomate for (15 minutes) have porosity level more than cold cure acrylic which polymerized for (20 minutes) in spite of the same processing technique, while the cold cure acrylic specimens which processed in Ivomate showed less level of porosity than that cold cure acrylic polymerized chemically on air and under hydraulic press.

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