Effect of addition ZrO2-Al2O3 nanoparticles mixture on
some properties and denture base adaptation of heat cured
acrylic resin denture base material
الباحث الأول:
Ali MA Aljafery, B.D.S.
الباحثين الآخرين:
Basima MAH, B.D.S., M.Sc., Ph.D.
المجلة:
J Bagh College Dentistry
تاريخ النشر:
None
مختصر البحث:
ABSTRACT
Background: The PMMA polymer denture base materials are low mechanical properties, adaptation of the denture
base to underlying tissue is important for retention and stability of denture. The aim of the study was toevaluate the
effect of…
ABSTRACT
Background: The PMMA polymer denture base materials are low mechanical properties, adaptation of the denture
base to underlying tissue is important for retention and stability of denture. The aim of the study was toevaluate the
effect of mixtureZrO2-Al2O3 nanoparticles on impact strength, transverse strength, hardness, roughness, denture base
adaptation of heat cured acrylic resin denture base material.
Materials and methods: One hundred (100) specimens were prepared, the specimens were divided into five groups
(20 specimens to each) according to the test type, each group was subdivided in to two subgroups (control and
experimental) each subgroup consist of 10 specimens, the experimental group included mixture of 2% (ZrO2-
Al2O3ratio2:1) by weight. Theimpact strength was measured by Charpy's impact testing machine, the transverse
strength was measured by Instron testing machine while the hardness was measured byshore D durometer and
roughness was measured by Profilometer. Denture base adaptation was measured by digital microscope and
evaluated by computerized tomography (CT).
Results: Highly significant increaseofimpact and transverse strength, non-significant increase ofhardness, significant
increase ofroughness andreduction of denture base adaptation (measured at 3 point A, B and C) occurred in
experimental groupwhen compared to control group. CT evaluation, gap between the denture base and master
cast (control and experimental groups) increased from the anterior to posterior side of palate and from the alveolar
ridge to the mid palatal line.
Conclusion: The polymer nanocomposites had mechanical properties higher than neat PMMA at same time less
denture base adaptation.
Keywords: Acrylic denture base, nano fillers, mechanical properties, denture base adaptation.
