Evaluation of Surface hardness of Denture Base Acrylic Resin Modified with Different Techniques | ||
| Al-Rafidain Dental Journal | ||
| Volume 23, Issue 2, September 2023, Pages 284-297 PDF (633.05 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.33899/rdenj.2023.133348.1160 | ||
| Authors | ||
| Inas Aziz M. Jawad* 1; Ammar Abdulghani Qasim2; Rizgar M.A. Hasan3 | ||
| 1Prosthodontic Dep. University of Mosul / college of Dentistry | ||
| 2University of Mosul/College of Dentistry/Dep. Of Dental Basic Sciences | ||
| 3Hawler Medical University/College of Dentistry / Dep. Of Prosthodontics | ||
| Abstract | ||
| Aims: Evaluation of the surface hardness of heat-treated acrylic resin after modifying it with three different techniques. Materials and Methods: Heat cured acrylic resin was modified by: (a) The copolymerization of acrylic resin with 5% and 10% of acrylic acid (AA), (b) The addition of 5% and 10% thermally activated zinc oxide (ZnO) and (c) The chemical bonding or engagement of Zinc ions into the polymer chain by an organic link, zinc diacrylate (ZDA) in 5% and 10%, to get a copolymer. The acrylic specimens have dimensions of (30, 15 and 3) ± 0.2 mm. Surface hardness was determined using a Durometer (Shore D) hardness tester. Results: There was general increase of the surface hardness of the experimental (modified) groups. A statical significant increase in the hardness of both acrylic groups modified by 10% ZnO and 10% ZDA compared to the control group and the remaining modified samples. Conclusion: Two techniques had significantly improved the hardness of heat cured acrylic resin; either by adding 10% by weight of thermally activated ZnO or by copolymerizing it with 10% by weight of ZDA to get poly (methyl methacrylate -co-zinc acrylate) copolymer. | ||
| Keywords | ||
| Acrylic Resin,,; ,،,؛Denture Base,,; ,،,؛Hardness,,; ,،,؛ZnO,,; ,،,؛Acrylic Acid,,; ,،,؛Shore D,,; ,،,؛PMMA | ||
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