The Effect of Zirconium Silicate Nanopowder Reinforcement on Some Mechanical and Physical Properties of Heat Cured Poly Methyl Methacrylate Denture Base Materials

2015 ◽  
Vol 27 (4) ◽  
pp. 37-43 ◽  
Author(s):  
Mohammed Moudhaffer ◽  
Saja Kareem
Keyword(s):  
Methyl Methacrylate ◽  
Physical Properties ◽  
Denture Base ◽  
Poly Methyl Methacrylate ◽  
Base Materials ◽  
Zirconium Silicate ◽  
Mechanical And Physical Properties

Novel cinnamon-laden nanofibers as a potential antifungal coating for poly(methyl methacrylate) denture base materials

2022 ◽  
Author(s):  
Juliana Silva Ribeiro ◽  
Ester Alves Ferreira Bordini ◽  
Gabriel Kalil Rocha Pereira ◽  
Rohitha Rao Polasani ◽  
Cristiane Helena Squarize ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Denture Base ◽  
Poly Methyl Methacrylate ◽  
Base Materials

scholarly journals The Mechanical Properties of a Poly(methyl methacrylate) Denture Base Material Modified with Dimethyl Itaconate and Di-n-butyl Itaconate

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Pavle Spasojevic ◽  
Milorad Zrilic ◽  
Vesna Panic ◽  
Dragoslav Stamenkovic ◽  
Sanja Seslija ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Methyl Methacrylate ◽  
Surface Hardness ◽  
Base Material ◽  
Dynamic Mechanical Properties ◽  
Denture Base ◽  
Mean Values ◽  
Poly Methyl Methacrylate ◽  
Base Materials ◽  
Wide Range

This study investigates a wide range of clinically relevant mechanical properties of poly(methyl methacrylate) (PMMA) denture base materials modified with di-methyl itaconate (DMI) and di-n-butyl itaconate (DBI) in order to compare them to a commercial PMMA denture base material. The commercial denture base formulation was modified with DMI and DBI by replacing up to 10 wt% of methyl methacrylate (MMA) monomer. The specimens were prepared by standard bath curing process. The influence of the itaconate content on hardness, impact strength, tensile, and thermal and dynamic mechanical properties was investigated. It is found that the addition of di-n-alkyl itaconates gives homogenous blends that show decreased glass transition temperature, as well as decrease in storage modulus, ultimate tensile strength, and impact fracture resistance with increase in the itaconate content. The mean values of surface hardness show no significant change with the addition of itaconates. The magnitude of the measured values indicates that the poly(methyl methacrylate) (PMMA) denture base material modified with itaconates could be developed into a less toxic, more environmentally and patient friendly product than commercial pure PMMA denture base material.

scholarly journals Poly(methyl methacrylate) denture base materials modified with ditetrahydrofurfuryl itaconate: Significant applicative properties

2015 ◽  
Vol 80 (9) ◽  
pp. 1177-1192 ◽  
Author(s):  
Pavle Spasojevic ◽  
Vesna Panic ◽  
Sanja Seslija ◽  
Vladimir Nikolic ◽  
Ivanka Popovic ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Methyl Methacrylate ◽  
Itaconic Acid ◽  
Sem Analysis ◽  
Denture Base ◽  
Elongation At Break ◽  
Poly Methyl Methacrylate ◽  
Base Materials ◽  
Monomer Content ◽  
Acid Esters

The aim of this work was to examine the possibility of modification of commercial denture base materials with itaconic acid esters, in order to obtain material with less toxicity and higher biocompatibility. Despite their relatively higher price compared to methacrylates, itaconic acid and itaconates are materials of choice for environmentally friendly applications, because they are not produced from petrochemical sources, but from plants. Commercial system based on poly(methyl methacrylate) was modified using ditetrahydrofurfuryl itaconate (DTHFI), wherein the ratio of DTHFI was varied from 2.5 to 10% by weight. Copolymerization was confirmed using FTIR spectroscopy, while SEM analysis showed the absence of micro defects and pores in the structure. The effect of the itaconate content on the absorption of fluids, the residual monomer content, thermal, dynamic-mechanical and mechanical properties (hardness, toughness, stress and elongation at break) was investigated. It was found that the addition of DTHFI significantly reduced the amount of residual methyl methacrylate, what made these materials less toxic. It was shown that the increase in DTHFI content gave materials with decreased glass transition temperature, as well as with decreased storage modulus, ultimate tensile strength and impact fracture resistance, however mechanical properties were in the rang prescribed by ADA standards, and can be used in practice. The deterioration of mechanical properties was therefore worth losing in order to gain lesser toxicity of the leached monomer.

scholarly journals Removable partial or complete dentures exposed to beverages and mouthwashes: evaluation of microhardness and roughness

2015 ◽  
Vol 44 (4) ◽  
pp. 189-194 ◽  
Author(s):  
Fernanda Alves Feitosa ◽  
Mateus Guimarães Lage Reggiani ◽  
Rodrigo Máximo de Araújo
Keyword(s):  
Methyl Methacrylate ◽  
Artificial Saliva ◽  
Soft Drink ◽  
Initial Period ◽  
Lemon Juice ◽  
Chlorhexidine Gluconate ◽  
Denture Base ◽  
Mean Values ◽  
Poly Methyl Methacrylate ◽  
The Mean

<title>Abstract</title><sec><title>Purpose</title><p>To evaluate microhardness and roughness of denture base polymethylmethacrylate resinn exposed to acid beverages and mouthwashes.</p></sec><sec><title>Material and method</title><p>Rectangular samples (n=80) were prepared from poly (methyl methacrylate) (PMMA). They were divided into 8 groups and had the initial microhardness and Knoop roughness measured. Samples of each group were immersed for 10 min into a test solution (coffee, lemon juice, chlorhexidine gluconate, red wine, cola-based soft drink, vinegar or antiseptic with and without alcohol) and after stored in artificial saliva for 23 h and 50 min, completing a period of 24 h. This procedure was performed for 14 consecutive days and after this period the microhardness and surface roughness measurements were made again. Data were statistically analyzed using ANOVA non parametric, Kruskal-Walis and the Dunn´s test for microhardness and the t-Student and ANOVA for roughness.</p></sec><sec><title>Result</title><p>For microhardness there were found statistically significant differences among the chlorhexidine gluconate solution, antiseptic without alcohol and cola-based soft drink. For roughness was observed that the mean values between the initial period and after immersion in the test products differed statistically in all groups, without difference among groups.</p></sec><sec><title>Conclusion</title><p>The microhardness of poly(methyl methacrylate) was affected by continue exposition to chlorhexidine gluconate, antiseptic without alcohol and cola-based soft drink. The roughness of poly(methyl methacrylate) is negatively influenced by the exposure to all tested products. It may be concluded that both, microhardness and roughness, were affected by the treatments.</p></sec>

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