Physical Properties of Polyamide-12 versus PMMA Denture Base Material
Joint Authors
Wieckiewicz, Mieszko
Richter, Gert
Opitz, Volker
Boening, Klaus W.
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-03-09
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Objectives.
Polyamide-12 (PA) is a flexible material suited for denture bases and clasping.
This study investigated its potential aging effects with a focus on surface roughness, color stability, and elasticity.
Methods.
PA specimens (Valplast) of 40×10×2 mm and equally measuring PMMA specimens (Palapress) as control were fabricated.
Color changes after storage in air, water, coffee, and red wine (n=10) were measured using the CIE L*a*b* color specification.
Elasticity after thermocycling (1000, 3000, and 7000 cycles, n=15) was measured by three-point bending testing.
Mean surface roughness (Ra) was determined after storage in the liquids mentioned above and thermocycling (n=10).
Results.
Tukey’s HSD test (P<0.05) revealed statistically significant color changes of PA in red wine (ΔE=4.27 after 12 days, ΔE=6.90 after 12 days) and coffee (ΔE=3.93 after 36 days) but no color changes in PMMA.
Elastic modulus of PA was 845 MPa and not affected by thermocycling (Tukey's HSD test, P>0.81).
Dry specimens showed significantly decreased elasticity (P<0.001).
Mean surface roughness (PA 0.20 μm, PMMA 0.28 μm) did not change significantly after thermocycling or storage (Mann-Whitney U-test, 0.16
Significance.
PA exhibited a higher susceptibility to discoloration than PMMA.
Neither surface roughness nor elasticity of PA was altered by artificial aging.
American Psychological Association (APA)
Wieckiewicz, Mieszko& Opitz, Volker& Richter, Gert& Boening, Klaus W.. 2014. Physical Properties of Polyamide-12 versus PMMA Denture Base Material. BioMed Research International،Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-449765
Modern Language Association (MLA)
Wieckiewicz, Mieszko…[et al.]. Physical Properties of Polyamide-12 versus PMMA Denture Base Material. BioMed Research International No. 2014 (2014), pp.1-8.
https://search.emarefa.net/detail/BIM-449765
American Medical Association (AMA)
Wieckiewicz, Mieszko& Opitz, Volker& Richter, Gert& Boening, Klaus W.. Physical Properties of Polyamide-12 versus PMMA Denture Base Material. BioMed Research International. 2014. Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-449765
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-449765