The effects of adding various ratios of zirconium oxide nanoparticles to poly(methyl methacrylate) on physical and mechanical properties

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ERGÜN G., Sahin Z., Ataol A. S.

JOURNAL OF ORAL SCIENCE, cilt.60, sa.2, ss.304-315, 2018 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 60 Sayı: 2
  • Basım Tarihi: 2018
  • Doi Numarası: 10.2334/josnusd.17-0206
  • Dergi Adı: JOURNAL OF ORAL SCIENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.304-315
  • Anahtar Kelimeler: denture base material, zirconium oxide nanoparticles, physical properties, mechanical properties, DENTURE BASE MATERIAL, POLYMETHYL METHACRYLATE, WATER SORPTION, ACRYLIC RESIN, SURFACE-ROUGHNESS, CANDIDA-ALBICANS, PMMA, SOLUBILITY, STRENGTH, FUNCTIONALIZATION
  • Gazi Üniversitesi Adresli: Evet

Özet

The aim of the present study is to evaluate the transverse strength, modulus of elasticity, surface roughness, hardness, and water sorption/solubility of nanoparticle zirconium oxide (nano-ZrO2) added to heat-cured poly(methyl methacrylate) (PMMA) after thermocycling. The specimens were divided into four groups according to the ratio of nano-ZrO2 addition to heat-cured PMMA; group 1: 5% nano-ZrO2; group 2: 10% nano-ZrO2; group 3: 20% nano-ZrO2, and group 4 (control): PMMA without nano-ZrO2. A statistically significant decrease in transverse strength was observed by all additional rates of nano-ZrO2 compared with group 4 (control; P < 0.025). When hardness results were evaluated, groups 1 and 2 showed statistically higher values compared with groups 3 and 4 (P < 0.025). The surface roughness of group 3 was statistically higher than the other groups (P < 0.025), but it was within the clinically acceptable limits. As the nano-ZrO2 addition rate increased, water sorption/solubility values of the specimens also increased. Although nano-ZrO2 addition had an adverse effect on some mechanical and physical properties of heat-cured PMMA, it increased hardness values, implying that the addition of nano-ZrO2 would contribute positively to some mechanical properties of PMMA denture base material when nano-ZrO2 was homogeneously distributed in PMMA.